Enhanced Photoelectrochemical Water Splitting Performance of Titania Nanotubes by Anodization
J. Environ. Nanotechnol., Volume 14, No 2 (June 2025) pp. 479-485
Abstract
This study examines the effect of anodization voltage (12 V, 20 V, 30 V) on the electrochemical characteristics of TiO2 nanotubes for photoelectrochemical water splitting applications. Our findings indicate that elevated anodization voltages (30 V) result in TiO2 nanotubes with markedly diminished charge transfer resistance (625 Ω) and improved photoconversion efficiency (1.42%) relative to lower voltages. Electrochemical impedance spectroscopy verifies a linear correlation between anodization voltage and barrier layer thickness of roughly 0.8 nm/V, while also exhibiting enhanced electron transport properties for the 30 V samples. The results identify anodization voltage as a critical factor for enhancing TiO2 nanotube efficacy in sustainable hydrogen production systems. This study enhances the fundamental comprehension of the influence of electrochemical anodization parameters on the characteristics and efficacy of TiO2 nanotubes, offering critical insights for the systematic design and optimization of effective photoanodes for sustainable hydrogen production via solar water splitting.
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Reference
David, T. M., Wilson, P., Mahesh, R., Sagayaraj, P., Murugesan, N., Ramesh, C. and Seshadri, H., Photocatalytic water splitting of TiO2 nanotubes powders prepared via rapid breakdown anodization sensitized with Pt, Pd and Ni nanoparticles, Mater. Technol., 33(4), 288–300(2018).
https://doi.org/10.1080/10667857.2018.1433349
Gabov, A. V. and Lizikova, M. S., Hydrogen Energy: Legal Support and International Cooperation, Her. Russ. Acad. Sci., 92, S612–S626(2022).
https://doi.org/10.1134/S1019331622130020
Ge, M., Li, Q., Cao, C., Huang, J., Li, S., Zhang, S., Chen, Z., Zhang, K., Deyab, A. S. S. and Lai, Y., One-dimensional TiO2 Nanotube Photocatalysts for Solar Water Splitting, Adv. Sci., 4(1), 1600152(2016).
https://doi.org/10.1002/advs.201600152
Gong, D., Grimes, C. A., Varghese, O. K., Hu, W., Singh, R. S., Chen, Z. and Dickey, E. C., Titanium oxide nanotube arrays prepared by anodic oxidation, J. Mater. Res., 16, 3331-3334(2001a).
https://doi.org/10.1557/JMR.2001.0457
Gong, J., Lai, Y. and Lin, C., Electrochemically multi-anodized TiO2 nanotube arrays for enhancing hydrogen generation by photoelectrocatalytic water splitting, Electrochimica Acta, 55(16), 4776–4782(2010b).
https://doi.org/10.1016/j.electacta.2010.03.055
Grimes, C. A. and Mor, G. K., Fabrication of TiO2 Nanotube Arrays by Electrochemical Anodization: Four Synthesis Generations, TiO2 Nanotube Arrays, 1–66(2009).
https://doi.org/10.1007/978-1-4419-0068-5_1
Kumar, M. P., Jagannathan, R. and Ravichandran, S., Photoelectrochemical System for Unassisted High-Efficiency Water-Splitting Reactions Using N-Doped TiO2 Nanotubes, Energy Fuels, 34(7), 9030–9036(2020).
https://doi.org/10.1021/acs.energyfuels.0c00634
Lettieri, S., Pavone, M., Fioravanti, A., Amato, L. S. and Maddalena, P., Charge carrier processes and optical properties in TiO2 and TiO2-based heterojunction photocatalysts: A review, Mater., 14(7), 1645(2021).
https://doi.org/10.3390/ma14071645
Liu, M. T. H., Zhang, J. and Wang, B., Fabrication of Titanium dioxide nanotube photo-electrodes in different electrolyte mixtures and the impacts on their characteristics and photo-catalytic abilities under visible light, Pol. J. Chem. Technol., 19(1), 34–40(2017).
https://doi.org/10.1515/pjct-2017-0005
Meena, B., Kumar, M., Kumar, A., Sinha, G. N., Nagumothu, R., Subramanyam, P., Suryakala, D. and Subrahmanyam, C., Integrated p-n Junctions for Efficient Solar Water Splitting upon TiO2/CdS/BiSbS3 Ternary Hybrids for Improved Hydrogen Evolution and Mechanistic Insight, Catal., 12(10), 1117(2022).
https://doi.org/10.3390/catal12101117
Mishra, P. R., Shukla, P. K. and Srivastava, O. N., Study of modular PEC solar cells for photoelectrochemical splitting of water employing nanostructured TiO2 photoelectrodes, Int. J. Hydrogen Energy, 32(12), 1680–1685(2007).
https://doi.org/10.1016/j.ijhydene.2006.10.002
Momeni, M. M. and Ghayeb, Y., Fabrication, characterization and photoelectrochemical behavior of Fe-TiO2 nanotubes composite photoanodes for solar water splitting, J. Electroanal. Chem., 751, 43–48(2015).
https://doi.org/10.1016/j.jelechem.2015.05.035
Rafique, M., Hajra, S., Irshad, M., Usman, M., Imran, M., Assiri, M. A. and Ashraf, W. M., Hydrogen Production Using TiO2-Based Photocatalysts: A Comprehensive Review, ACS Omega, 8(29), 25640–25648(2023).
https://doi.org/10.1021/acsomega.3c00963
Rathod, P. B. and Waghuley, S. A., Synthesis and UV-Vis spectroscopic study of TiO2 nanoparticles, Int. J. Nanomanuf., 11(3–4), 185–193(2015).
https://doi.org/10.1504/IJNM.2015.071925
Roy, P., Berger, S. and Schmuki, P., TiO2 nanotubes: Synthesis and applications, Angewandte Chem. Int. Edt., 50(13), 2904–2939(2011).
https://doi.org/10.1002/anie.201001374
Schulte, K. L., DeSario, P. A. and Gray, K. A., Effect of crystal phase composition on the reductive and oxidative abilities of TiO2 nanotubes under UV and visible light, Appl. Catal. B Environ., 97(3–4), 354–360(2010).
https://doi.org/10.1016/j.apcatb.2010.04.017
Song, H., Luo, S., Huang, H., Deng, B. and Ye, J., Solar-Driven Hydrogen Production: Recent Advances, Challenges, and Future Perspectives, ACS Energy Lett., 7(3), 1043–1065(2022).
https://doi.org/10.1021/acsenergylett.1c02591
Zakir, O., Idouhli, R., Elyaagoubi, M., Khadiri, M., Aityoub, A., Koumya, Y., Rafqah, S., Abouelfida, A. and Outzourhit, A., Fabrication of TiO2 Nanotube by Electrochemical Anodization: Toward Photocatalytic Application, J. Nanomater., 2020(1), 4745726(2020).
https://doi.org/10.1155/2020/4745726
Zhang, J. Z., Metal oxide nanomaterials for solar hydrogen generation from photoelectrochemical water splitting, MRS Bulletin, 36(1), 48–55(2011).
