Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 320, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121979
Keywords
Photo -Fenton; Electron transfer; DFT calculation; Heterointerface; CuS; MIL-Fe
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In this study, a new CuS/MIL-Fe heterojunction catalyst was designed, which exhibited excellent removal ability of active pharmaceutical pollution. The heterojunction had a high-speed electron transfer channel, realizing the synergistic effect of photo and Fenton degradation.
Active pharmaceutical pollution has become a new force of water pollution, and a high-efficiency process is urgently required to remove it. Herein, the CuS/MIL-Fe heterojunction catalyst with high-speed electron transfer channel is designed by adjusting the energy band and regulating the direction of electron transfer, which exhibits excellent acetaminophen (APAP) removal ability in photo-Fenton reaction. The charge transfer pathway of heterojunction is identified by X-ray photoelectron spectroscopy analysis and density functional theory (DFT) calculation, which provides the evidence of electron transfer from CuS to MIL-101(Fe) at the heterointerface. Meanwhile, kelvin probe force microscopy measurement indicates that photogenerated electrons can be easily transported through the CuS/MIL-Fe interface. The close contact interface and high charge transfer conductivity realize the synergistic effect of photo and Fenton degradation by establishing high-speed electron transfer channel. This study will open up a new insight into the application of heterojunction photo-Fenton technology in environmental remediation.
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