1. S-scheme carbon doped-TiO 2 /ZnIn 2 S 4 heterojunction for enhanced photocatalytic degradation of microcystin-LR and hydrogen evolution.
- Author
-
Wang X, Ding L, Li X, Wang Z, Xu X, Deng F, and Luo X
- Subjects
- Catalysis, Photolysis, Water Pollutants, Chemical chemistry, Wastewater chemistry, Light, Photochemical Processes, Zinc chemistry, Microcystins chemistry, Titanium chemistry, Marine Toxins chemistry, Hydrogen chemistry, Carbon chemistry
- Abstract
Photocatalytic degradation of pollutants coupled with hydrogen (H
2 ) evolution has emerged as a promising solution for environmental and energy crises. However, the fast recombination of photoexcited electrons and holes limits photocatalytic activities. Herein, an S-scheme heterojunction carbon doped-TiO2 /ZnIn2 S4 (C-TiO2 /ZnIn2 S4 ) was designed by substituting oxygen sites within C-TiO2 by ZnIn2 S4 . Under visible light irradiation, the optimal C-TiO2 /ZnIn2 S4 exhibits a higher degradation efficiency (88.6%) of microcystin-LR (MC-LR), compared to pristine C-TiO2 (72.9%) and ZnIn2 S4 (66.8%). Furthermore, the H2 yield of the C-TiO2 /ZnIn2 S4 reaches 1526.9 μmol g-1 h-1 , which is 3.83 times and 2.87 times that of the C-TiO2 and ZnIn2 S4 , respectively. Experimental and theoretical investigations reveal that an internal electric field (IEF) informed in the C-TiO2 /ZnIn2 S4 heterojunction, accelerates the separation of photogenerated charge pairs, thereby enhancing photocatalytic efficiency of MC-LR degradation and H2 production. This work highlights a new perspective on the development of high-performance photocatalysts for wastewater treatment and H2 generation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
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