Cu2−xSe Modification onto Monoclinic BiVO4 for Enhanced Photocatalytic Activity Under Visible Light | Zendy

Zirui Liu | Zendy; Xiaoyong Liu | Zendy; Xinxin Gu | Zendy; Renqing Guo | Zendy; Wenwu Zhong | Zendy

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Cu2−xSe Modification onto Monoclinic BiVO4 for Enhanced Photocatalytic Activity Under Visible Light

Author(s) -

Zirui Liu,

Xiaoyong Liu,

Xinxin Gu,

Renqing Guo,

Wenwu Zhong

Publication year - 2019

Publication title -

nanoscale research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.87

H-Index - 107

eISSN - 1931-7573

pISSN - 1556-276X

DOI - 10.1186/s11671-019-2929-7

Subject(s) - photocatalysis , monoclinic crystal system , materials science , nanochemistry , semiconductor , electron , recombination , band gap , nanotechnology , chemical engineering , optoelectronics , chemical physics , catalysis , crystallography , chemistry , physics , crystal structure , biochemistry , gene , quantum mechanics , engineering

The rapid recombination of electron-hole pairs in BiVO 4 has limited its performance as a photocatalysis. In this paper, BiVO 4 is combined with Cu 2− x Se semiconductor to slow down the recombination process, and thus improve its photocatalytic activity. This is enabled by careful band structure design. The work function of Cu 2− x Se is larger than that of BiVO 4 . Therefore, electrons flow to Cu 2− x Se from BiVO 4 after the composition. Accordingly, an inner field could be built, which facilitates the separation of electrons and holes. The experimental result shows that the photocatalytic efficiency of the 3 wt% Cu 2− x Se/BiVO 4 composite is 15.8 times than that of pure BiVO 4 .

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