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Structures and photoelectrochemical performances of reduced TiO2 NTAs obtained by hydrogen thermal and electrochemical reduction methods

  • Guangqing XuEmail author
  • Qiang Feng
  • Zhiwei Wang
  • Jun Lv
  • Jun Huang
  • Yong Li
  • Pengjie ZhangEmail author
  • Yucheng WuEmail author
Original Paper
  • 22 Downloads

Abstract

Reduced TiO2 nanotube arrays were obtained by hydrogen-thermal and electrochemical reduction methods respectively, and the photoelectrochemical performances were studied. Phase structures, elemental compositions, and surficial morphologies were characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) to investigate the structural differences between as-prepared TiO2 NTAs and reduced TiO2 NTAs, including two different reducing products. The photoelectrochemical performances of TiO2 NTAs were found to be enhanced by both two reducing methods. The different mechanisms of hydrogen-thermal reduction and electrochemical reduction were investigated by comparing optical absorption, charge transport, separation efficiency of charge carriers, and surficial reactions during the photoelectrochemical processes. For hydrogen-thermal-reduced TiO2 NTAs, the improved photoelectrochemical performances are induced by high optical absorption and low recombination of charge carries, whereas for electrochemical reduced TiO2 NTAs, the enhanced performances are attributed to low charge transport resistance.

Keywords

Reduced TiO2 nanotubes arrays Photoelectrochemistry Hydrogen thermal reduction Electrochemical reduction 

Notes

Funding information

This work was financially supported by the 111 Project “New Materials and Technology for Clean Energy” (B18018) and the Key Technologies R & D Program of Anhui Province (1704c0402195).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringHefei University of TechnologyHefeiChina
  2. 2.Key Laboratory of Advanced Functional Materials and Devices of Anhui ProvinceHefei University of TechnologyHefeiChina
  3. 3.School of Instrument Science and Optoelectronics EngineeringHefei University of TechnologyHefeiChina
  4. 4.BGRIMM Magnetic Materials and Technology Co., LtdBeijingChina

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