Journal
CHEMOSPHERE
Volume 310, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.136853
Keywords
Heterojunction; Nitrophenol; Z -scheme; Reusability; Quantum yield
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This review summarizes the recent progress on heterojunction photocatalysts for eliminating nitrophenols, highlighting the mechanisms of electron-hole pair separation and evaluating the performance of the photocatalysts. The results show that Z-scheme heterojunction exhibits the highest removal efficiency, and further research is needed to improve the reusability of the heterojunction photocatalyst.
Nitrophenols are the most widely used raw materials in the chemical, pesticide, and pharmaceutical industries. Due to improper waste management and excessive usage, nitrophenol is listed as a priority pollutant and garnered global research attention. This review highlights the recent progress on heterojunction photocatalysts toward eliminating nitrophenols. The detailed mechanisms of the electron-hole pair separation using different heterojunctions such as traditional, p-n, Z-scheme, S-scheme, and Schottky heterojunctions are elaborated. The performance of the photocatalysts is evaluated using quantum efficiency. Among the heterojunctions, Z-scheme exhibited maximum removal efficiency of 100% and found superior over other heterojunctions. Even though heterojunctions exhibit good efficiency, the reusability of the heterojunction photocatalyst is not reported beyond 5 cycles. Further research is indeed to develop a highly reusable photocatalyst for environmental remediation.
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