期刊
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
卷 343, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2023.123524
关键词
Oxygen vacancy; Switching of Charge transfer; Photocatalysis; Bisphenol A; H 2 evolution
This study reports the fabrication of a heterojunction between defect induced CeO2 and iron based metal organic framework (MIL-53), and investigates its application in Bisphenol A breakdown and photocatalytic hydrogen generation from water splitting. The improved photocatalytic performance of the heterojunction can be attributed to the switching of charge transfer mechanism.
This work reports the fabrication of heterojunction between defect induced CeO2 and iron based metal organic framework (MIL-53). A simple chemical redox etching methodology was adopted to narrow the band gap of pristine CeO2 through oxygen vacancy engineering. The photocatalytic efficacy of defect induced CeO2/MIL-53 (MCO-X) heterojunction was studied in Bisphenol A (BPA) breakdown and photocatalytic hydrogen generation from water splitting. The significantly improved photocatalytic application of MCO-X heterojunction could be attributed to the switching of charge dynamics mechanism from Type-1 to Type-II due to defect formation in the pristine CeO2. The optimal photocatalyst (MCO-30) displayed the highest photocatalytic BPA degradation with rate constant (0.045 min-1) and H2 evolution (3286.2 mu mol.h-1. g-1) respectively. This study provides a comprehensive analysis on how defect in pristine CeO2 in MCO-X heterojunction can switch the charge transfer mechanism from Type-1 to Type-II to achieve remarkable visible light harnessing capacity and photocatalytic activity.
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