Journal
NANOTECHNOLOGY
Volume 32, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/abcd63
Keywords
Ag; In2S3; ZnO composite; Z-scheme heterojunction; LSPR; photocatalytic activity; Schottky junction
Funding
- Tianjin Key Science and Technology Program Foundation [19PTZWHZ00030, 19YFSLQY00060, 19YFZCSF01110]
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Ag/In2S3/ZnO nanorods composite photocatalysts were successfully prepared via simple methods, showing good activity in oxidizing water or hydroxide ions into hydroxyl radicals. The composite exhibits higher photocatalytic activity in degrading 4-nitrophenol, attributed to the formation of Z-scheme heterojunction between ZnO NRs and In2S3, as well as the local surface plasmon resonance of Ag and Schottky junction formed between Ag and In2S3.
Herein, Ag/In2S3/ZnO nanorods (NRs) composite photocatalysts were successfully prepared via simple methods. Significantly, hydroxyl radical active substances were found in the electron spin resonance tests of In2S3/ZnO NRs and Ag/In2S3/ZnO NRs, which indicates that the oxidation reaction that oxidizes water or hydroxide ions into hydroxyl radicals occurs on the valence band of ZnO NRs. It suggests that Z-scheme heterojunction was successfully constructed. In the photocatalytic experiments of degrading 4-nitrophenol (PNP), the Ag/In2S3/ZnO NRs composite exhibits higher photocatalytic activity than ZnO NRs, In2S3, Ag/ZnO NRs and In2S3/ZnO NRs. The characteristic peak of PNP disappears completely in 50 min. The enhanced photocatalytic performance can be attributed to the formation of Z-scheme heterojunction between ZnO NRs and In2S3. In addition, local surface plasmon resonance of Ag and Schottky junction formed between Ag and In2S3 also promote the photocatalytic activity.
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