Cu2−x Se Modification onto Monoclinic BiVO4 for Enhanced Photocatalytic Activity Under Visible Light
Abstract The rapid recombination of electron-hole pairs in BiVO4 has limited its performance as a photocatalysis. In this paper, BiVO4 is combined with Cu2−x Se semiconductor to slow down the recombination process, and thus improve its photocatalytic activity. This is enabled by careful band structu...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2019-03-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s11671-019-2929-7 |
| Summary: | Abstract The rapid recombination of electron-hole pairs in BiVO4 has limited its performance as a photocatalysis. In this paper, BiVO4 is combined with Cu2−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 Cu2−x Se is larger than that of BiVO4. Therefore, electrons flow to Cu2−x Se from BiVO4 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% Cu2−x Se/BiVO4 composite is 15.8 times than that of pure BiVO4. |
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| ISSN: | 1931-7573 1556-276X |