Journal
MATERIALS LETTERS
Volume 232, Issue -, Pages 191-195Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.08.119
Keywords
Semiconductors; BiOI/Bi4O5I2; Nanocomposites; Heterojunction; Hg-0
Funding
- National Natural Science Foundation of China [21237003, 50806041, 51106133, 51606115]
- Natural Science Foundation of Shanghai [16ZR1413500, 18ZR1416200, 18YF1409000]
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BiOI/Bi4O5I2 heterojunction photocatalysts were prepared by in-situ crystallization. The influence of the heterostructure on the photocatalyst was investigated by XRD, SEM, HRTEM, UV-vis DRS and PL characterization. The photocatalytic performance of the sample was evaluated by the photocatalytic removal rate of Hg-0 under visible-light irradiation. The results show that BiOI-390 exhibits the best photocatalytic performance. It can be attributed to the construction of heterostructures, which inhibits the recombination of photogenerated electron-hole pairs. Based on characterization and experiments, a reasonable Z-scheme charge transfer and photocatalytic reaction mechanism were proposed. (C) 2018 Elsevier B.V. All rights reserved.
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