Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 229, Issue -, Pages 171-180Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.02.008
Keywords
Hydrothermal method; Plasmonic p-n heterojunction photocatalyst; Photocatalytic mechanism
Funding
- National Natural Science Foundation of China [51472101, 41373111, 51578279]
- China Postdoctoral Science Foundation [2017M610336, 2016M591757]
- Natural Science Foundation of Jiangsu Province of China [BK20160430]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1601179C]
- Huaian Key Research and Development (Social Development) Program of China [HAS201601]
- Key University Science Research Project of Jiangsu Province [11KJA150004]
- Natural Science Foundation of Jiangsu Provincial Department of Education [17KJA150002]
- Hong Kong Scholars Program
- Shanghai Tongji Gao Tingyao Environmental Science & Technology Development Foundation (STGEF)
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A novel 3D structure Ag/p-Ag2S/n-BiVO4 plasmonic p-n heterojunction photocatalyst was successfully fabricated via a depositing p-type Ag2S on n-type BiVO4, followed by light reduction. In this innovative plasmonic p-n heterojunction photocatalyst strcture, p-n heterojunction can play the role of suppression of charge recombination, and surface plasmon resonance of Ag can enhance the absorption of visible light confirmed by finite difference time domain (FDTD) simulations method. For the photocatalytic oxidation of oxytetracycline hydrochloride (OTH) and reduction of Cr6+, the Ag/p-Ag2S/n-BiVO(4)exhibits excellent photocatalytic performance, compared with BiVO4 and p-Ag2S/n-BiVO4. The results of active species detection reveal that h(+) radical is the main reactive species in the photocatalytic oxidation of OTH. Moreover, 13 photocatalytic degradation intermediates and products of OTH were also identified by the gas chromatography-mass spectrometer (GC-MS). Finally, the photocatalytic oxidation and reduction mechanism over Ag/p-Ag2S/n-BiVO4 was discussed in detail. The present study will benefit the development of the new plasmonic p-n heterojunction photocatalysts and would be of great importance to meet ever-increasing environmental demands in the future.
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