Challenges and future directions in photoelectro-Fenton techniques: A comprehensive review of emerging applications and innovations
DOI:
https://doi.org/10.31699/IJCPE.2025.3.7Keywords:
Electrode arrangements; Novel reactors; Fenton hybrid; Doping methods; Fenton's challengesAbstract
This comprehensive review examines the fundamental principles and practical applications of heterogeneous electrochemical wastewater treatment utilizing Fenton's reactions. The fundamental equations involved in generating hydroxyl-free radicals in electro-Fenton and photoelectro-Fenton processes have been reviewed. Photoelectro-Fenton processes have been proven to be the most effective methods for mineralizing and degrading pollutants in wastewater. The primary focus is on understanding the limitations of hybrid Fenton processes and proposing practical solutions to address these challenges. Additionally, the study evaluated the significance of electrode configuration development and light penetration enhancement in promoting hydrogen peroxide production and enhancing hydroxyl radical generation. These improvements contribute to the enhanced degradation and mineralization of contaminants in groundwater. A comparative analysis of electrode materials, novel reactor configurations, and operating conditions demonstrates the relationship between preparation methods and treatment efficiency. Research gaps for improving the photoelectro-Fenton process are identified, with suggestions for future work. Studies have shown that internal light irradiation leads to higher removal efficiency compared to external lighting systems with the same light source power. The most important recommendations were utilizing multi-electrode stacked reactors to reduce energy consumption, enhancing current efficiency, the shape of the electrodes also plays a vital role in increasing light exposure on the photoanode surfaces, and conducting long-term experiments with various contaminants to demonstrate the reactor's stability, efficiency, and efficacy in treating industrial wastewater.
Received on 19/05/2025
Received in Revised Form on 15/07/2025
Accepted on 22/07/2025
Published on 30/09/2025
References
[1] I. H. Dakhil, "Adsorption of Lead from Industrial Effluents using Rice Husk," International Journal of Engineering and Management Research (IJEMR), vol. 5, no. 1, pp. 109-116, 2015.
[2] S. Garcia-Segura, J. D. Ocon, and M. N. Chong, "Electrochemical oxidation remediation of real wastewater effluents : A review," Process Safety and Environmental Protection, vol. 113, pp. 48-67, 2018. https://doi.org/10.1016/j.psep.2017.09.014
[3] I. H. Dakhil, "Effect of Adding Zinc Oxide on Waste Rubber Tire Powder for Increasing Adsorption of Cadmium (II) from Wastewater," The Iraqi Journal For Mechanical And Material Engineering, 2015.
[4] O. M. Rodriguez-Narvaez, J. M. Peralta-Hernandez, A. Goonetilleke, and E. R. Bandala, "Treatment technologies for emerging contaminants in water: A review," Chemical Engineering Journal, vol. 323, pp. 361-380, 2017. https://doi.org/10.1016/j.cej.2017.04.106
[5] I. H. Dakhil, G. F. Naser, and A. H. Ali, "Assessment of Modified Rice Husks for Removal of Aniline in Batch Adsorption Process: Optimization and Isotherm Study," Journal of Ecological Engineering, vol. 22, no. 7, 2021. https://doi.org/10.12911/22998993/138900
[6] S. K. Barno, H. J. Mohamed, S. M. Saeed, M. J. Al-Ani, and A. S. Abbas, "Prepared 13X zeolite as a promising adsorbent for the removal of brilliant blue dye from wastewater," Iraqi Journal of Chemical and Petroleum Engineering vol. 22, no. 2, pp. 1-6, 2021. https://doi.org/10.31699/IJCPE.2021.2.1
[7] F. E. Titchou, H. Zazou, H. Afanga, J. El Gaayda, R. A. Akbour, and M. Hamdani, "Removal of persistent organic pollutants (POPs) from water and wastewater by adsorption and electrocoagulation process," Groundwater for Sustainable Development, vol. 13, p. 100575, 2021. https://doi.org/10.1016/j.gsd.2021.100575
[8] M. Banaś and B. Hilger, "Proposal for New Method for Calculating Sedimentation Process Efficiency in Water Treatment Plants," (in eng), Materials (Basel), vol. 17, no. 13, 2024. https://doi.org/10.3390/ma17133285
[9] S. K. Al-Amshawee, M. Y. Yunus, and I. H. Dakhil, "Ion exchange membrane electrodialysis for water and wastewater processing: application of ladder-type membrane spacers to impact solution concentration and flow dynamics," Environmental Science and Pollution Research, pp. 1-22, 2023. https://doi.org/10.1007/s11356-023-27940-z
[10] S. K. A. Al‐Amshawee, M. Y. Bin Mohd Yunus, and I. Habib Dakhil, "Multilayered membrane spacer: does it enhance solution mixing?," Journal of Chemical Technology & Biotechnology, vol. 98, no. 11, pp. 2627-2638, 2023. https://doi.org/10.1002/jctb.7344
[11] L. Mishra, K. K. Paul, and S. Jena, "Coke wastewater treatment methods: mini review," Journal of the Indian Chemical Society, vol. 98, no. 10, p. 100133, 2021. https://doi.org/10.1016/j.jics.2021.100133
[12] I. H. Dakhil, "Adsorption of Chromium (VI) from Aqueous Solutions using Low Cost Adsorbent: Equilibrium and Regeneration Studies," Journal of Engineering, vol. 19, no. 11, pp. 1395-1407, 2013. https://doi.org/10.31026/j.eng.2013.11.04
[13] I. H. Dakhil, G. F. Naser, and A. H. Ali, "Response Surface Modeling of Arsenic Adsorption by Modified Spent Tea Leaves," in IOP Conference Series: Materials Science and Engineering, 2021, vol. 1090, no. 1, p. 012129: IOP Publishing. https://doi.org/10.1088/1757-899X/1090/1/012129
[14] S. Roy, A. Garg, S. Garg, and T. A. Tran, Advanced industrial wastewater treatment and reclamation of water. Springer, 2022. https://doi.org/10.1007/978-3-030-83811-9
[15] B. Wang, Z. Song, and L. Sun, "A review: Comparison of multi-air-pollutant removal by advanced oxidation processes–Industrial implementation for catalytic oxidation processes," Chemical Engineering Journal, vol. 409, p. 128136, 2021. https://doi.org/10.1016/j.cej.2020.128136
[16] I. H. Dakhil, "Removal of Kerosene from Wastewater Using Locally Sawdust," in Proceeding of 1st International Conference of Southern Technical University/Iraq, 2016, vol. 16, p. 17.
[17] J. L. Wang and L. J. and Xu, "Advanced Oxidation Processes for Wastewater Treatment: Formation of Hydroxyl Radical and Application," Critical Reviews in Environmental Science and Technology, vol. 42, no. 3, pp. 251-325, 2012. https://doi.org/10.1080/10643389.2010.507698
[18] M. A. Oturan and J. J. Aaron, "Advanced oxidation processes in water/wastewater treatment: principles and applications. A review," Critical reviews in environmental science technology, vol. 44, no. 23, pp. 2577-2641, 2014. https://doi.org/10.1080/10643389.2013.829765
[19] Y. Liu and J. Wang, "Multivalent metal catalysts in Fenton/Fenton-like oxidation system: A critical review," Chemical Engineering Journal, vol. 466, p. 143147, 2023. https://doi.org/10.1016/j.cej.2023.143147
[20] S. Lim, J. L. Shi, U. von Gunten, and D. L. McCurry, "Ozonation of organic compounds in water and wastewater: A critical review," Water Research, vol. 213, p. 118053, 2022. https://doi.org/10.1016/j.watres.2022.118053
[21] R. Jassim and A. Abbas, “Congo red dye removal from aqueous solutions by photocatalytic redox reactions: Degradation kinetics and simulation using dispersion model”, Environmental Research and Technology, vol. 8, no. 3, pp. 672–681, 2025. https://doi.org/10.35208/ert.1527903
[22] A. H. Ali, Dakhil, I. H., "Photocatalytic decolorization of Methyl Red dye under solar light," Jornal of kerbala university, vol. 10, no. 3, 2012.
[23] C. Feng, N. Sugiura, S. Shimada, and T. Maekawa, "Development of a high performance electrochemical wastewater treatment system," Journal of Hazardous Materials, vol. 103, no. 1, pp. 65-78, 2003. https://doi.org/10.1016/S0304-3894(03)00222-X
[24] M. Z. Akbari, Y. Xu, Z. Lu, and L. Peng, "Review of antibiotics treatment by advance oxidation processes," Environmental Advances, vol. 5, p. 100111, 2021. https://doi.org/10.1016/j.envadv.2021.100111
[25] S. K. Kamal and A. S. Abbas, "Decrease in the organic content of refinery wastewater by photocatalytic Fenton oxidation using iron-doped zeolite: Catalyst preparation, characterization, and performance," Chemical Engineering Processing-Process Intensification, vol. 193, p. 109549, 2023. https://doi.org/10.1016/j.cep.2023.109549
[26] I. A. Taher, Dakhil, I.H., Kubba, Ziyad, Ali, Ahmed Hassan, "Degradation High Concentration of Eosin Yellowish Dye in Heterogeneous Catalyst Solution," Journal of Global Pharma Technology, vol. 10, no. 11, pp. 704-709, 2018.
[27] R. N. Abbas and A. S. Abbas, "Kinetics and energetic parameters study of phenol removal from aqueous solution by electro-fenton advanced oxidation using modified electrodes with PbO2 and graphene," Iraqi Journal of Chemical and Petroleum Engineering, vol. 23, no. 2, pp. 1-8, 2022. https://doi.org/10.31699/IJCPE.2022.2.1
[28] M. Kurian, "Advanced oxidation processes and nanomaterials-a review," Cleaner Engineering and Technology, vol. 2, p. 100090, 2021. https://doi.org/10.1016/j.clet.2021.100090
[29] S. K. Kamal and A. S. Abbas, "Fenton oxidation reaction for removing organic contaminants in synesthetic refinery wastewater using heterogeneous Fe-Zeolite: An experimental study, optimization, and simulation," Case Studies in Chemical Environmental Engineering, vol. 8, p. 100458, 2023. https://doi.org/10.1016/j.cscee.2023.100458
[30] H. J. H. Fenton, "Oxidation of tartaric acid in presence of iron," Journal of the Chemical Society, Transactions, vol. 65, pp. 899-910, 1894. https://doi.org/10.1039/CT8946500899
[31] J. J. Pignatello, E. Oliveros, and A. MacKay, "Advanced oxidation processes for organic contaminant destruction based on the Fenton reaction and related chemistry," Critical reviews in environmental science technology, vol. 36, no. 1, pp. 1-84, 2006. https://doi.org/10.1080/10643380500326564
[32] P. Nidheesh, M. Zhou, and M. A. Oturan, "An overview on the removal of synthetic dyes from water by electrochemical advanced oxidation processes," Chemosphere, vol. 197, pp. 210-227, 2018. https://doi.org/10.1016/j.chemosphere.2017.12.195
[33] A. Babuponnusami and K. Muthukumar, "A review on Fenton and improvements to the Fenton process for wastewater treatment," Journal of Environmental Chemical Engineering, vol. 2, no. 1, pp. 557-572, 2014. https://doi.org/10.1016/j.jece.2013.10.011
[34] C. A. Martínez-Huitle and E. Brillas, "Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods: A general review," Applied Catalysis B: Environmental, vol. 87, no. 3, pp. 105-145, 2009. https://doi.org/10.1016/j.apcatb.2008.09.017
[35] F. C. Moreira, R. A. R. Boaventura, E. Brillas, and V. J. P. Vilar, "Electrochemical advanced oxidation processes: A review on their application to synthetic and real wastewaters," Applied Catalysis B: Environmental, vol. 202, pp. 217-261, 2017. https://doi.org/10.1016/j.apcatb.2016.08.037
[36] W. P. Ting, M. C. Lu, and Y. H. Huang, "The reactor design and comparison of Fenton, electro-Fenton and photoelectro-Fenton processes for mineralization of benzene sulfonic acid (BSA)," Journal of hazardous materials, vol. 156, no. 1-3, pp. 421-427, 2008. https://doi.org/10.1016/j.jhazmat.2007.12.031
[37] S. Malato, P. Fernández-Ibáñez, M. I. Maldonado, J. Blanco, and W. Gernjak, "Decontamination and disinfection of water by solar photocatalysis: recent overview and trends," Catalysis today, vol. 147, no. 1, pp. 1-59, 2009. https://doi.org/10.1016/j.cattod.2009.06.018
[38] O. M. Cornejo, I. Sirés, and J. L. Nava, "Characterization of a flow-through electrochemical reactor for the degradation of ciprofloxacin by photoelectro-Fenton without external oxygen supply," Chemical Engineering Journal, vol. 455, p. 140603, 2023. https://doi.org/10.1016/j.cej.2022.140603
[39] A. Ledezma Estrada, Y.-Y. Li, and A. Wang, "Biodegradability enhancement of wastewater containing cefalexin by means of the electro-Fenton oxidation process," Journal of Hazardous Materials, vol. 227-228, pp. 41-48, 2012. https://doi.org/10.1016/j.jhazmat.2012.04.079
[40] H. Olvera-Vargas, C. Trellu, P. V. Nidheesh, E. Mousset, S. O. Ganiyu, C. A. Martínez-Huitle, M. Zhou, and M. A. Oturan, "Challenges and opportunities for large-scale applications of the electro-Fenton process," Water Research, vol. 266, p. 122430, 2024. https://doi.org/10.1016/j.watres.2024.122430
[41] C. A. Martínez-Huitle and M. Panizza, "Electrochemical oxidation of organic pollutants for wastewater treatment," Current Opinion in Electrochemistry, vol. 11, pp. 62-71, 2018. https://doi.org/10.1016/j.coelec.2018.07.010
[42] F. Yu, M. Zhou, and X. Yu, "Cost-effective electro-Fenton using modified graphite felt that dramatically enhanced on H2O2 electro-generation without external aeration," Electrochimica Acta, vol. 163, pp. 182-189, 2015. https://doi.org/10.1016/j.electacta.2015.02.166
[43] S. Garcia-Segura, M. Lanzarini-Lopes, K. Hristovski, and P. Westerhoff, "Electrocatalytic reduction of nitrate: Fundamentals to full-scale water treatment applications," Applied Catalysis B: Environmental, vol. 236, pp. 546-568, 2018. https://doi.org/10.1016/j.apcatb.2018.05.041
[44] M. Coha, G. Farinelli, A. Tiraferri, M. Minella, and D. Vione, "Advanced oxidation processes in the removal of organic substances from produced water: Potential, configurations, and research needs," Chemical Engineering Journal, vol. 414, p. 128668, 2021. https://doi.org/10.1016/j.cej.2021.128668
[45] G. F. Naser, I. H. Dakhil, and A. A. Hasan, "Evaluation of electro-fenton process for removal of amoxicillin from simulated wastewater," Global NEST Journal, vol. 26, pp. 1-6, 2024. https://doi.org/10.30955/gnj.006075
[46] R. V. McQuillan, G. W. Stevens, and K. A. Mumford, "Assessment of the electro-Fenton pathway for the removal of naphthalene from contaminated waters in remote regions," Science of the Total Environment, vol. 762, p. 143155, 2021. https://doi.org/10.1016/j.scitotenv.2020.143155
[47] R. Abbas and A. S. Abbas, "PbO2/graphite and graphene/carbon fiber as an electrochemical cell for oxidation of organic contaminants in refinery wastewater by electrofenton process; electrodes preparation, characterization and performance," Environmental Research and Technology, vol. 7, no. 2, pp. 175-185, 2024. https://doi.org/10.35208/ert.1378232
[48] H. H. Thwaini, R. H. Salman, and W. S. Abdul-Majeed, "Performance of Electro-Fenton Process for Phenol Degradation Using Nickel Foam as a Cathode," Iraqi Journal of Chemical Petroleum Engineering, vol. 24, no. 3, pp. 13-25, 2023. https://doi.org/10.31699/IJCPE.2023.3.2
[49] Z. I. Abbas and A. S. Abbas, "Optimization of the electro-Fenton process for cod reduction from refinery wastewater," Environmental Engineering Management Journal, vol. 19, no. 11, 2020.
[50] Z. U. H. Khan, N. S. Gul, S. Sabahat, J. Sun, K. Tahir, N. S. Shah, N. Muhammad, A. Rahim, M. Imran, J. Iqbal, T. M. Khan, S. Khasim, U. Farooq, and J. Wu, "Removal of organic pollutants through hydroxyl radical-based advanced oxidation processes," Ecotoxicology and Environmental Safety, vol. 267, p. 115564, 2023. https://doi.org/10.1016/j.ecoenv.2023.115564
[51] A. S. Abbas and R. N. Abbas, "Phenol deterioration in refinery wastewater through advanced electrochemical oxidation reactions using different carbon fiber and graphite electrodes configurations," Egyptian Journal of Chemistry, vol. 65, no. 13, 2022. https://doi.org/10.21608/EJCHEM.2022.123342.5510
[52] Z. I. Abbas and A. S. Abbas, "Oxidative degradation of phenolic wastewater by electro-fenton process using MnO2-graphite electrode," Journal of Environmental Chemical Engineering, vol. 7, no. 3, p. 103108, 2019. https://doi.org/10.1016/j.jece.2019.103108
[53] A. Kuleyin, A. Gök, and F. Akbal, "Treatment of textile industry wastewater by electro-Fenton process using graphite electrodes in batch and continuous mode," Journal of Environmental Chemical Engineering, vol. 9, no. 1, p. 104782, 2021. https://doi.org/10.1016/j.jece.2020.104782
[54] R. Q. Al-Khafaji and A. H. Mohammed, "Performance of Combined Electrocoagulation-Advanced Electrochemical Oxidation Used for Oil Field Produced Water Treatment," Journal of Petroleum Research & Studies, no. 30, 2021. https://doi.org/10.52716/jprs.v11i1.432
[55] R. Salazar and M. Ureta-Zañartu, "Mineralization of triadimefon fungicide in water by electro-Fenton and photo electro-Fenton," Water, Air, and Soil Pollution, vol. 223, pp. 4199-4207, 2012. https://doi.org/10.1007/s11270-012-1184-7
[56] B. Nayebi and B. Ayati, "Degradation of emerging amoxicillin compound from water using the electro-Fenton process with an aluminum anode," Water Conservation Science and Engineering, vol. 6, pp. 45-54, 2021. https://doi.org/10.1007/s41101-021-00101-4
[57] R. Q. Al-Khafaji and A. H. A. Mohammed, "Optimization of continuous electro-fenton and photo electro-fenton processes to treat Iraqi oilfield produced water using surface response methodology," in IOP Conference Series: Materials Science and Engineering, 2019, vol. 518, no. 6, p. 062007: IOP Publishing. https://doi.org/10.1088/1757-899X/518/6/062007
[58] H. H. Vigil-Castillo, E. J. Ruiz-Ruiz, K. López-Velázquez, L. Hinojosa-Reyes, O. Gaspar-Ramírez, and J. L. Guzmán-Mar, "Assessment of photo electro-Fenton and solar photo electro-Fenton processes for the efficient degradation of asulam herbicide," Chemosphere, vol. 338, p. 139585, 2023. https://doi.org/10.1016/j.chemosphere.2023.139585
[59] D. Clematis and M. Panizza, "Electro-Fenton, solar photoelectro-Fenton and UVA photoelectro-Fenton: Degradation of Erythrosine B dye solution," Chemosphere, vol. 270, p. 129480, 2021. https://doi.org/10.1016/j.chemosphere.2020.129480
[60] I. C. Da Costa Soares, R. Oriol, Z. Ye, C. A. Martínez-Huitle, P. L. Cabot, E. Brillas, and I. Sirés, "Photoelectro-Fenton treatment of pesticide triclopyr at neutral pH using Fe (III)–EDDS under UVA light or sunlight," Environmental Science and Pollution Research, vol. 28, pp. 23833-23848, 2021. https://doi.org/10.1007/s11356-020-11421-8
[61] A. J. Dos Santos, C. A. Martínez‐Huitle, I. Sires, and E. Brillas, "Use of Pt and Boron‐Doped Diamond Anodes in the Electrochemical Advanced Oxidation of Ponceau SS Diazo Dye in Acidic Sulfate Medium," ChemElectroChem, vol. 5, no. 4, pp. 685-693, 2018. https://doi.org/10.1002/celc.201701238
[62] J. A. Banuelos, O. García-Rodríguez, F. J. Rodriguez-Valadez, and L. A. Godinez, "Electrochemically prepared iron-modified activated carbon electrodes for their application in electro-Fenton and photoelectro-Fenton processes," Journal of The Electrochemical Society, vol. 162, no. 9, p. E154, 2015. https://doi.org/10.1149/2.0581509jes
[63] A. Dirany, I. Sirés, N. Oturan, A. Özcan, and M. A. Oturan, "Electrochemical Treatment of the Antibiotic Sulfachloropyridazine: Kinetics, Reaction Pathways, and Toxicity Evolution," Environmental Science & Technology, vol. 46, no. 7, pp. 4074-4082, 2012. https://doi.org/10.1021/es204621q
[64] G. Coria, I. Sirés, E. Brillas, and J. L. Nava, "Influence of the anode material on the degradation of naproxen by Fenton-based electrochemical processes," Chemical Engineering Journal, vol. 304, pp. 817-825, 2016. https://doi.org/10.1016/j.cej.2016.07.012
[65] A. Wang, Y. Y. Li, and A. L. Estrada, "Mineralization of antibiotic sulfamethoxazole by photoelectro-Fenton treatment using activated carbon fiber cathode and under UVA irradiation," Applied Catalysis B: Environmental, vol. 102, no. 3, pp. 378-386, 2011. https://doi.org/10.1016/j.apcatb.2010.12.007
[66] M. D. G. de Luna, M. L. Veciana, C.-C. Su, and M.-C. Lu, "Acetaminophen degradation by electro-Fenton and photoelectro-Fenton using a double cathode electrochemical cell," Journal of Hazardous Materials, vol. 217-218, pp. 200-207, 2012. https://doi.org/10.1016/j.jhazmat.2012.03.018
[67] A. C. Crispim, D. M. de Araújo, C. A. Martínez-Huitle, F. L. Souza, and E. V. Dos Santos, "Application of electro-Fenton and photoelectro-Fenton processes for the degradation of contaminants in landfill leachate," Environmental Research, vol. 213, p. 113552, 2022. https://doi.org/10.1016/j.envres.2022.113552
[68] I. H. Dakhil and A. S. Abbas, “Preparation, characterization, and performance of potential stainless steel electrodes modified with immobilized semiconductors for persistent organic pollutants via photoelectro-Fenton process”, Clean Technologies and Environmental Policy, 1–19, 2025. https://doi.org/10.1007/S10098-025-03334-2
[69] F. H. Kamil, S. K. Barno, F. Shems, A. Jihad, and A. S. Abbas, "Photocatalytic degradation of sulfamethoxazole from a synthetic pharmaceutical wastewater using titanium dioxide (TiO2) powder as a suspended heterogeneous catalyst," Iraqi Journal of Industrial Research, vol. 10, no. 1, pp. 26-33, 2023. https://doi.org/10.53523/ijoirVol10I1ID314
[70] S. K. Kamal, Z. M. Mustafa, and A. S. Abbas, "Comparative Study of Organics Removal from Refinery Wastewater by Photocatalytic Fenton Reaction Coupled with Visible Light and Ultraviolet Irradiation," Iraqi Journal of Industrial Research, vol. 10, no. 3, pp. 22-32, 2023. https://doi.org/10.53523/ijoirVol10I3ID370
[71] W. Wang, Y. Li, Y. Li, M. Zhou, and O. A. Arotiba, "Electro-Fenton and photoelectro-Fenton degradation of sulfamethazine using an active gas diffusion electrode without aeration," Chemosphere, vol. 250, p. 126177, 2020. https://doi.org/10.1016/j.chemosphere.2020.126177
[72] E. J. Ruiz, C. Arias, E. Brillas, A. Hernández-Ramírez, and J. M. Peralta-Hernández, "Mineralization of Acid Yellow 36azo dye by electro-Fenton and solar photoelectro-Fenton processes with a boron-doped diamond anode," Chemosphere, vol. 82, no. 4, pp. 495-501, 2011. https://doi.org/10.1016/j.chemosphere.2010.11.013
[73] Ç. Çalık and D. İ. Çifçi, "Comparison of kinetics and costs of Fenton and photo-Fenton processes used for the treatment of a textile industry wastewater," Journal of environmental management, vol. 304, p. 114234, 2022. https://doi.org/10.1016/j.jenvman.2021.114234
[74] A. Babuponnusami and K. Muthukumar, "Advanced oxidation of phenol: a comparison between Fenton, electro-Fenton, sono-electro-Fenton and photo-electro-Fenton processes," Chemical Engineering Journal, vol. 183, pp. 1-9, 2012. https://doi.org/10.1016/j.cej.2011.12.010
[75] S. Garcia-Segura, L. C. Almeida, N. Bocchi, and E. Brillas, "Solar photoelectro-Fenton degradation of the herbicide 4-chloro-2-methylphenoxyacetic acid optimized by response surface methodology," Journal of Hazardous Materials, vol. 194, pp. 109-118, 2011. https://doi.org/10.1016/j.jhazmat.2011.07.089
[76] A. Khataee, A. Khataee, M. Fathinia, B. Vahid, and S. W. Joo, "Kinetic modeling of photoassisted-electrochemical process for degradation of an azo dye using boron-doped diamond anode and cathode with carbon nanotubes," Journal of Industrial and Engineering Chemistry, vol. 19, no. 6, pp. 1890-1894, 2013. https://doi.org/10.1016/j.jiec.2013.02.037
[77] F. C. Walsh, L. F. Arenas, and C. Ponce de León, "Developments in electrode design: structure, decoration and applications of electrodes for electrochemical technology," Journal of Chemical Technology & Biotechnology, vol. 93, no. 11, pp. 3073-3090, 2018. https://doi.org/10.1002/jctb.5706
[78] L. F. Arenas, C. P. de León, R. P. Boardman, and F. C. Walsh, "Characterisation of platinum electrodeposits on a titanium micromesh stack in a rectangular channel flow cell," Electrochimica Acta, vol. 247, pp. 994-1005, 2017. https://doi.org/10.1016/j.electacta.2017.07.029
[79] F. Walsh and C. Low, "A review of developments in the electrodeposition of tin-copper alloys," Surface and Coatings Technology, vol. 304, pp. 246-262, 2016. https://doi.org/10.1016/j.surfcoat.2016.06.065
[80] X. Li, D. Pletcher, and F. C. Walsh, "Electrodeposited lead dioxide coatings," Chemical Society Reviews, vol. 40, no. 7, pp. 3879-3894, 2011. https://doi.org/10.1039/c0cs00213e
[81] I. Sirés, E. Brillas, M. A. Oturan, M. A. Rodrigo, and M. Panizza, "Electrochemical advanced oxidation processes: today and tomorrow. A review," Environmental Science and Pollution Research, vol. 21, pp. 8336-8367, 2014. https://doi.org/10.1007/s11356-014-2783-1
[82] S. Garcia-Segura and E. Brillas, "Applied photoelectrocatalysis on the degradation of organic pollutants in wastewaters," Journal of Photochemistry and Photobiology C: Photochemistry Reviews, vol. 31, pp. 1-35, 2017. https://doi.org/10.1016/j.jphotochemrev.2017.01.005
[83] S. O. Ganiyu, C. A. Martínez-Huitle, and M. A. Rodrigo, "Renewable energies driven electrochemical wastewater/soil decontamination technologies: A critical review of fundamental concepts and applications," Applied Catalysis B: Environmental, vol. 270, p. 118857, 2020. https://doi.org/10.1016/j.apcatb.2020.118857
[84] S. S. Al-Azawiey, I. H. Dakhel, G. F. Naser, and A. H. Ali, "Photocatalytic Decolorization Simulated Textile Dyebath Effluent under Solar Light and Reuse it for Industrial Propose," IOP Conference Series: Materials Science and Engineering, vol. 1090, no. 1, p. 012126, 2021. https://doi.org/10.1088/1757-899X/1090/1/012126
[85] R. Montenegro-Ayo, T. Pérez, M. R. Lanza, E. Brillas, S. Garcia-Segura, and A. J. dos Santos, "New electrochemical reactor design for emergent pollutants removal by electrochemical oxidation," Electrochimica Acta, vol. 458, p. 142551, 2023. https://doi.org/10.1016/j.electacta.2023.142551
[86] Y. Lei, Z. Zhan, M. Saakes, R. D. van der Weijden, and C. J. Buisman, "Electrochemical recovery of phosphorus from wastewater using tubular stainless-steel cathode for a scalable long-term operation," Water Research, vol. 199, p. 117199, 2021. https://doi.org/10.1016/j.watres.2021.117199
[87] D. Li, T. Zheng, Y. Liu, D. Hou, K. K. Yao, W. Zhang, H. Song, H. He, W. Shi, and L. Wang, "A novel Electro-Fenton process characterized by aeration from inside a graphite felt electrode with enhanced electrogeneration of H2O2 and cycle of Fe3+/Fe2+," Journal of hazardous materials, vol. 396, p. 122591, 2020. https://doi.org/10.1016/j.jhazmat.2020.122591
[88] J. Liang, Y. Hou, H. Zhu, J. Xiong, W. Huang, Z. Yu, and S. Wang, "Levofloxacin degradation performance and mechanism in the novel electro-Fenton system constructed with vanadium oxide electrodes under neutral pH," Chemical Engineering Journal, vol. 433, p. 133574, 2022. https://doi.org/10.1016/j.cej.2021.133574
[89] R. A. Jassim and S. A. Ammar, "Comparative study for degradation of Congo red dye from synthetic wastewater by photocatalytic redox reactions using various nanoscale semiconductors," Iraqi Journal of Chemical and Petroleum Engineering vol. 26, no. 2, pp. 83-91, 2025. https://doi.org/10.31699/IJCPE.2025.2.9
[90] R. Montenegro-Ayo, J. C. Morales-Gomero, H. Alarcon, S. Cotillas, P. Westerhoff, and S. Garcia-Segura, "Scaling up photoelectrocatalytic reactors: a TiO2 nanotube-coated disc compound reactor effectively degrades acetaminophen," Water, vol. 11, no. 12, p. 2522, 2019. https://doi.org/10.3390/w11122522
[91] S. McMichael, P. Fernández-Ibáñez, and J. A. Byrne, "A Review of Photoelectrocatalytic Reactors for Water and Wastewater Treatment," Water, vol. 13, no. 9, p. 1198, 2021. https://doi.org/10.3390/w13091198
[92] C. Flox, J. A. Garrido, R. M. Rodríguez, P. L. Cabot, F. Centellas, C. Arias, and E. Brillas, "Mineralization of herbicide mecoprop by photoelectro-Fenton with UVA and solar light," Catalysis Today, vol. 129, no. 1-2, pp. 29-36, 2007. https://doi.org/10.1016/j.cattod.2007.06.049
[93] J. Peralta-Hernández, Y. Meas-Vong, F. J. Rodríguez, T. W. Chapman, M. I. Maldonado, and L. A. Godínez, "In situ electrochemical and photo-electrochemical generation of the fenton reagent: a potentially important new water treatment technology," Water research, vol. 40, no. 9, pp. 1754-1762, 2006. https://doi.org/10.1016/j.watres.2006.03.004
[94] G. De OS Santos, K. I. Eguiluz, G. R. Salazar-Banda, C. Saez, and M. A. Rodrigo, "Testing the role of electrode materials on the electro-Fenton and photoelectro-Fenton degradation of clopyralid," Journal of Electroanalytical Chemistry, vol. 871, p. 114291, 2020. https://doi.org/10.1016/j.jelechem.2020.114291
[95] W. Zhou, X. Meng, J. Gao, F. Sun, and G. Zhao, "Janus graphite felt cathode dramatically enhance the H2O2 yield from O2 electroreduction by the hydrophilicity-hydrophobicity regulation," Chemosphere, vol. 278, p. 130382, 2021. https://doi.org/10.1016/j.chemosphere.2021.130382
[96] M. Panizza and M. A. Oturan, "Degradation of Alizarin Red by electro-Fenton process using a graphite-felt cathode," Electrochimica Acta, vol. 56, no. 20, pp. 7084-7087, 2011. https://doi.org/10.1016/j.electacta.2011.05.105
[97] J. F. Pérez, C. Sáez, J. Llanos, P. Cañizares, C. López, and M. A. Rodrigo, "Improving the Efficiency of Carbon Cloth for the Electrogeneration of H2O2: Role of Polytetrafluoroethylene and Carbon Black Loading," Industrial & Engineering Chemistry Research, vol. 56, no. 44, pp. 12588-12595, 2017. https://doi.org/10.1021/acs.iecr.7b02563
[98] S. Garcia-Segura, E. B. Cavalcanti, and E. Brillas, "Mineralization of the antibiotic chloramphenicol by solar photoelectro-Fenton: From stirred tank reactor to solar pre-pilot plant," Applied Catalysis B: Environmental, vol. 144, pp. 588-598, 2014. https://doi.org/10.1016/j.apcatb.2013.07.071
[99] S. Garcia-Segura and E. Brillas, "Combustion of textile monoazo, diazo and triazo dyes by solar photoelectro-Fenton: Decolorization, kinetics and degradation routes," Applied Catalysis B: Environmental, vol. 181, pp. 681-691, 2016. https://doi.org/10.1016/j.apcatb.2015.08.042
[100] E. Brillas, "Electro-Fenton, UVA photoelectro-Fenton and solar photoelectro-Fenton treatments of organics in waters using a boron-doped diamond anode: a review," Journal of the Mexican Chemical Society, vol. 58, no. 3, pp. 239-255, 2014. https://doi.org/10.29356/jmcs.v58i3.131
[101] E. Mousset and D. D. Dionysiou, "Photoelectrochemical reactors for treatment of water and wastewater: a review," Environmental Chemistry Letters, vol. 18, no. 4, pp. 1301-1318, 2020. https://doi.org/10.1007/s10311-020-01014-9
[102] J. Xiao, L. Peng, L. Gao, J. Zhong, Z. Huang, E. Yuan, V. Srinivasapriyan, S.-F. Zhou, and G. Zhan, "Improving light absorption and photoelectrochemical performance of thin-film photoelectrode with a reflective substrate," RSC Advances, 10.1039/D1RA02826J vol. 11, no. 27, pp. 16600-16607, 2021. https://doi.org/10.1039/D1RA02826J
[103] O. M. Cornejo, M. F. Murrieta, L. F. Castañeda, and J. L. Nava, "Characterization of the reaction environment in flow reactors fitted with BDD electrodes for use in electrochemical advanced oxidation processes: A critical review," Electrochimica Acta, vol. 331, p. 135373, 2020. https://doi.org/10.1016/j.electacta.2019.135373
[104] C. Zhang, Y. Jiang, Y. Li, Z. Hu, L. Zhou, and M. Zhou, "Three-dimensional electrochemical process for wastewater treatment: A general review," Chemical Engineering Journal, vol. 228, pp. 455-467, 2013. https://doi.org/10.1016/j.cej.2013.05.033
[105] I. S. Michie, J. R. Kim, R. M. Dinsdale, A. J. Guwy, and G. C. Premier, "The influence of anodic helical design on fluid flow and bioelectrochemical performance," Bioresource Technology, vol. 165, pp. 13-20, 2014. https://doi.org/10.1016/j.biortech.2014.03.069
[106] B. Wang, G. M. Biesold, M. Zhang, and Z. Lin, "Amorphous inorganic semiconductors for the development of solar cell, photoelectrocatalytic and photocatalytic applications," Chemical Society Reviews, vol. 50, no. 12, pp. 6914-6949, 2021. https://doi.org/10.1039/d0cs01134g
[107] D. Sengupta, P. Das, B. Mondal, and K. Mukherjee, "Effects of doping, morphology and film-thickness of photo-anode materials for dye sensitized solar cell application – A review," Renewable and Sustainable Energy Reviews, vol. 60, pp. 356-376, 2016. https://doi.org/10.1016/j.rser.2016.01.104
[108] H. Yoo, K. Heo, M. H. R. Ansari, and S. Cho, "Recent advances in electrical doping of 2D semiconductor materials: Methods, analyses, and applications," Nanomaterials, vol. 11, no. 4, p. 832, 2021. https://doi.org/10.3390/nano11040832
[109] O. Madkhali, "A review of novel methods to improve the optical and electrical properties of n-type and p-type sulphides and oxides: leading the frontiers of semiconductor technology," Physica Scripta, vol. 99, no. 2, p. 022004, 2024. https://doi.org/10.1088/1402-4896/ad1e44
[110] Y. P. Hsiao, W. L. Yang, Y. H. Lin, Y. C. Yang, C. C. Hsu, C. L. Peng, C. H. Liao, F. T. Chin, S. H. Liu, and Y. M. Chang, "Adjustable Switching Voltage Via Sol-Gel Derived and Ag In Situ Doped SiO2 Thin Films for ReRAM," ECS Transactions, vol. 53, no. 3, p. 223, 2013. https://doi.org/10.1149/05303.0223ecst
[111] Q.-H. Zhang, X.-R. Deng, W. Yang, H.-H. Hui, Y.-W. Wei, and J.-J. Chen, "Comparative study on cracking behavior of sol-gel silica antireflective coating for high-powered laser system," Engineering Failure Analysis, vol. 82, pp. 64-71, 2017. https://doi.org/10.1016/j.engfailanal.2017.08.026
[112] K. Zhang, X. Wang, X. Guo, T. He, and Y. Feng, "Preparation of highly visible light active Fe–N co-doped mesoporous TiO2 photocatalyst by fast sol–gel method," Journal of Nanoparticle Research, vol. 16, no. 2, p. 2246, 2014. https://doi.org/10.1007/s11051-014-2246-0
[113] L. F. Pedrini, L. C. Escaliante, and L. V. Scalvi, "Deposition of TiO2 thin films by dip-coating technique from a two-phase solution method and application to photocatalysis," Materials Research, vol. 24, no. Suppl 1, p. e20210007, 2021. https://doi.org/10.1590/1980-5373-MR-2021-0007
[114] N. Dhiman and N. Singla, "Smart Nanocoating‐an Innovative Solution to Create Intelligent Functionality on Surface," Chemistry Select, vol. 9, no. 41, p. e202403038, 2024. https://doi.org/10.1002/slct.202403038
[115] R. A. Sathya and C. Ponraj, "Superhydrophobic route of fabricating antireflective, self-cleaning, and durable coatings for solar cell applications," Journal of Coatings Technology and Research, vol. 21, no. 1, pp. 1-30, 2024. https://doi.org/10.1007/s11998-023-00843-x
[116] T. Xia, M. Chen, L. Xiao, W. Fan, B. Mao, D. Xu, P. Guan, J. Zhu, and W. Shi, "Dip-coating synthesis of P-doped BiVO4 photoanodes with enhanced photoelectrochemical performance," Journal of the Taiwan Institute of Chemical Engineers, vol. 93, pp. 582-589, 2018. https://doi.org/10.1016/j.jtice.2018.09.003
[117] P. V. Shinde, D. P. Dutta, N. M. Shinde, and R. S. Mane, "Chapter 12 - Electrophoretic deposition of metal oxide nanostructures," in Solution Methods for Metal Oxide Nanostructures, R. Mane, V. Jadhav, and A. Al-Enizi, Eds.: Elsevier, 2023, pp. 221-266. https://doi.org/10.1016/B978-0-12-824353-4.00007-5
[118] L. Besra and M. Liu, "A review on fundamentals and applications of electrophoretic deposition (EPD)," Progress in Materials Science, vol. 52, no. 1, pp. 1-61, 2007. https://doi.org/10.1016/j.pmatsci.2006.07.001
[119] M. Atiq Ur Rehman, Q. Chen, A. Braem, M. S. P. Shaffer, and A. R. Boccaccini, "Electrophoretic deposition of carbon nanotubes: recent progress and remaining challenges," International Materials Reviews, vol. 66, no. 8, pp. 533-562, 2021. https://doi.org/10.1080/09506608.2020.1831299
[120] N. S. Peighambardoust and U. Aydemir, "Electrophoretic deposition and characterization of self-doped SrTiO(3) thin films," (in eng), Turk J Chem, vol. 45, no. 2, pp. 323-332, 2021. https://doi.org/10.3906/kim-2007-13
[121] N. Mehta, Overview of Coating Deposition Techniques (Tribology Characterization of Surface Coatings). 2022, pp. 1-32. https://doi.org/10.1002/9781119818878.ch1
[122] R. Garg, S. Gonuguntla, S. Sk, M. S. Iqbal, A. O. Dada, U. Pal, and M. Ahmadipour, "Sputtering thin films: Materials, applications, challenges and future directions," Advances in Colloid and Interface Science, vol. 330, p. 103203, 2024. https://doi.org/10.1016/j.cis.2024.103203
[123] A. Villamayor, T. Pomone, S. Perero, M. Ferraris, V. L. Barrio, E. G-Berasategui, and P. Kelly, "Development of photocatalytic nanostructured TiO2 and NiO/TiO2 coatings by DC magnetron sputtering for photocatalytic applications," Ceramics International, vol. 49, no. 11, Part B, pp. 19309-19317, 2023. https://doi.org/10.1016/j.ceramint.2023.03.058
[124] T. B. Yaqub, T. Vuchkov, P. Sanguino, T. Polcar, and A. Cavaleiro, "Comparative Study of DC and RF Sputtered MoSe2 Coatings Containing Carbon—An Approach to Optimize Stoichiometry, Microstructure, Crystallinity and Hardness," Coatings, vol. 10, no. 2, p. 133, 2020. https://doi.org/10.3390/coatings10020133
[125] F. Toma, M. S. Rahman, S. Rahman, K. Hussain, and S. Ahmed, "Thin Film Deposition Techniques: A Comprehensive Review," J Mod Nanotechnol, vol. 4, no. 6, 2024. https://doi.org/10.53964/jmn.2024006
[126] A. J. Jawad, "Review on Recent Developments in Coating Procedure by Using Direct Current (DC) Sputtering for Optical Medical Applications," Pakistan Journal of Scientific Industrial Research Series A: Physical Sciences, vol. 66, no. 1, 2023.
[127] R. B. A. Souza and L. A. M. Ruotolo, "Electrochemical treatment of oil refinery effluent using boron-doped diamond anodes," Journal of Environmental Chemical Engineering, vol. 1, no. 3, pp. 544-551, 2013. https://doi.org/10.1016/j.jece.2013.06.020
[128] O. M. Cornejo, M. F. Murrieta, L. F. Castañeda, and J. L. Nava, "Electrochemical reactors equipped with BDD electrodes: Geometrical aspects and applications in water treatment," Current Opinion in Solid State and Materials Science, vol. 25, no. 4, p. 100935, 2021. https://doi.org/10.1016/j.cossms.2021.100935
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