Preparation of Cu2O/TiO2 nanotube arrays and their photoelectrochemical properties as hydrogen-evolving photoanode

Lixia Sang; Jing Zhang; Yudong Zhang; Yangbo Zhao; Jia Lin

doi:10.1117/12.2187908

25 September 2015 Preparation of Cu₂O/TiO₂ nanotube arrays and their photoelectrochemical properties as hydrogen-evolving photoanode

Lixia Sang, Jing Zhang, Yudong Zhang, Yangbo Zhao, Jia Lin

Author Affiliations +

Proceedings Volume 9560, Solar Hydrogen and Nanotechnology X; 95600M (2015) https://doi.org/10.1117/12.2187908
Event: SPIE Optics + Photonics for Sustainable Energy, 2015, San Diego, California, United States

Abstract

Cu₂O is an environment-friendly p-type semiconductor with narrow band gap (2.0~2.2eV), which has become a popular sensitizer of TiO₂. The present work is focused on the preparation of Cu₂O/TiO₂ nanotube arrays heterostructures via electrochemical deposition. TiO₂ nanotube arrays were prepared by anodic oxidation method and calcined at 450°C, then Cu₂O were deposited on TiO₂ nanotube arrays in a three-electrode system with surfactants PVP in electrolyte at different deposition potentials (-0.2V and-0.3V) for deposition time 5min. The results show that Cu₂O nanoparticles deposit on TiO₂ nanotube successfully. The obtained Cu₂O nanoparticles were quite different in size at deposition potential -0.2V and -0.3V. The resulting Cu₂O/TiO₂nanotube arrays have the significant photoresponse in visible light region. Under irradiation of solar simulator (AM1.5, 100mW/cm²), the photocurrent density of the Cu₂O/TiO₂ nanotube arrays when Cu₂O was deposited at a voltage of -0.3V is more than that of pure TiO₂ nanotube arrays.

Citation Download Citation

Lixia Sang, Jing Zhang, Yudong Zhang, Yangbo Zhao, and Jia Lin "Preparation of Cu₂O/TiO₂ nanotube arrays and their photoelectrochemical properties as hydrogen-evolving photoanode", Proc. SPIE 9560, Solar Hydrogen and Nanotechnology X, 95600M (25 September 2015); https://doi.org/10.1117/12.2187908

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