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Bi2S3-modified TiO2 nanotube arrays: easy fabrication of heterostructure and effective enhancement of photoelectrochemical property

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Abstract

A novel heterostructure of Bi2S3 nanoparticles (NPs) and TiO2 nanotube arrays (NAs) was fabricated by a conventional hydrothermal method. The morphological features and the X-ray diffractogram of the obtained Bi2S3/TiO2 NAs were characterized by field-emission scanning electron microscopy, transmission electron microscopy, and powder X-ray diffraction. The photoelectrochemical property of Bi2S3/TiO2 NAs was also evaluated. The results demonstrated that photoelectrochemical solar cells based on Bi2S3/TiO2 NAs had a short-circuit current of 4.54 mA/cm2 and photoelectric conversion efficiency of 1.86 %. Surface photovoltage spectroscopy and field-induced surface photovoltage spectroscopy data indicated the existence of a strong interfacial electronic field between the two components Bi2S3 NPs and TiO2 NAs, which can enhance the separation of photogenerated charge carriers.

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Acknowledgements

This work was partially supported by National Natural Science Foundation of China (50872116, 51202202, 51271155); International Thermonuclear Experimental Reactor (ITER) Program: 2011GB112001; Fundamental Research Funds for the Central Universities (SWJTU12CX017, WJTU11ZT31, SWJTU11ZT16); National High-tech R&D Program of China (863 Program) (2007AA03Z203); Research Fund for the Doctoral Program of Higher Education of China (SRFDP200806130023); the PCSIRT of the Ministry of Education of China (IRT0751); Doctor Innovation Fund of Southwest Jiaotong University (2012); Program of International S&T Cooperation (S2013ZR0595); New Teachers’ Fund for Doctor Stations, Ministry of Education (20120184120024).

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Authors and Affiliations

  1. Key Laboratory of Advanced Technology of Materials (Ministry of Education of China), Superconductivity and New Energy R&D Center, Southwest Jiaotong University, Mail Stop 165#, Chengdu, 610031, People’s Republic of China

    Fang-Gong Cai, Feng Yang, Yong-Fang Jia, Chuan Ke & Yong Zhao

  2. School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, 2052, Australia

    Cui-Hua Cheng & Yong Zhao

Authors
  1. Fang-Gong Cai
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  2. Feng Yang
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  3. Yong-Fang Jia
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  4. Chuan Ke
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  5. Cui-Hua Cheng
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  6. Yong Zhao
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Correspondence to Feng Yang or Yong Zhao.

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Cai, FG., Yang, F., Jia, YF. et al. Bi2S3-modified TiO2 nanotube arrays: easy fabrication of heterostructure and effective enhancement of photoelectrochemical property. J Mater Sci 48, 6001–6007 (2013). https://doi.org/10.1007/s10853-013-7396-4

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