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Performance of amorphous CoSx/oxygen vacancies ZnO heterojunction photocatalytic hydrogen evolution

  • Yanru Li
  • Jing XuEmail author
  • Zeying Liu
  • Hai Yu
Article
  • 62 Downloads

Abstract

CoSx/OV–ZnO is prepared by two-step hydro-thermal method. The photocatalytic hydrogen evolution amount of ZnO samples is near to zero. The novel composite photocatalyst CoSx/OV–ZnO have high photocatalytic liveness. It is up to 256 µmol under visible light irradiation for 5 h, which is about increased 30% than CoSx/ZnO. The hydrogen production number of CoSx/OV–ZnO do not reduce obviously after 15 h irradiation, it exhibits high photocatalytic stability. The morphologies, surface features and physical characteristics of catalyst are analysed by scanning electron microscope (SEM), X-ray diffraction, X-ray energy spectrum (XPS), Brunner–Emmet–Teller (BET), and fluorescence spectra etc. The SEM results demonstrates amorphous CoSx is uniformly diffused on the hexagonal wurtzite OV–ZnO. The XPS shows the successful synthesis of ZnO oxygen vacancies. The CoSx/OV–ZnO has better superficial area and pore volume (BET), which is conducive to the adsorption of EY molecules. The ZnO electron transfer and the charge separation are obviously improved (fluorescence and electrochemical). Accordingly, CoSx/OV–ZnO might be a latent new photocatalyst.

Notes

Acknowledgements

This work was supported by Ningxia Higher Institutions Scientific Research Program (NGY2016146), and the Graduate Student Innovation Project at North MinZu University (YCX18083).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringNorth Minzu UniversityYinchuanPeople’s Republic of China
  2. 2.Key Laboratory of Chemical Engineering & Technology, North Minzu UniversityThe State National Affairs Commission of People’s Republic of ChinaYinchuanPeople’s Republic of China

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