4.6 Article

Fabrication of Ti3+/TNS-CZTS heterostructures nanosheet arrays for photocatalytic enhancement

期刊

VACUUM
卷 201, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.vacuum.2022.111117

关键词

p-n heterojunction; Photocatalysis; TiO2 nanosheet arrays; Cu2ZnSnS4; Ti(3+)self-doping

资金

  1. National Natural Science Foundation of P. R. China [12065022]
  2. Project of Higher Education Teaching Achievement Cultivation of Gansu Province [2020-184]
  3. Innovation Foundation for Colleges and Universities of Gansu Province [2020A-138, 2021A-154]
  4. Education Science The Fourteenth Five-year Plan Project of Gansu Province [2021-2060]
  5. Scientific Research Foundation of Gansu Normal College for Nationalities [GSMYPYZD-2021-07, GSNUXM16-44]
  6. Project of Teaching Achievement Cultivation of Gansu Normal College for Nationalities [GNUNJXCGPY1818, GNUNJXCGPY2012]

向作者/读者索取更多资源

In this study, a Ti3+/TNS(TiO2 nanosheet arrays)-CZTS (Cu2ZnSnS4) photocatalyst was designed and synthesized. The Ti3+ modification evenly distributed p-type CZTS nanoflowers on the surface of n-type TNS, forming a CZTS/TiO2 p-n heterostructure. The Ti3+/TNS-CZTS photocatalyst exhibited significantly better photocatalytic activity for methyl orange degradation compared to TNS, which can be attributed to the doping of Ti3+ and the synergistic effect of the CZTS/TiO2 p-n heterojunction.
In this study, the Ti3+/TNS(TiO2 nanosheet arrays)-CZTS (Cu2ZnSnS4) photocatalyst had been designed and synthesized through a simple and effective method. The characteristics of microstructure showed that p-type CZTS nanoflowers are evenly distributed on the surface of n-type TNS after Ti3+ modification, forming CZTS/TiO2 p-n heterostructure. The photocatalytic activity of Ti3+/TNS-CZTS for methyl orange (MO) degradation was obviously better than that of TNS, with an elimination rate of 80% after 120 min. The excellent photocatalytic performance of Ti3+/TNS-CZTS may be ascribed to the doping of Ti3+ and the synergistic effect of CZTS/TiO(2)p-n heterojunction, which can narrow the band gap and inhibit the electron-hole recombination. Therefore, the study of Ti3+/TNS-CZTS photocatalyst in this paper provides new insights for the development of wastewater treatment and hydrogen evolution in the future.

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