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Media type:
E-Book
Title:
3d Hierarchical Local Heterojunction as Ultra-High Efficient Fenton-Like Catalyst
:
Mechanism of Coupling the Proton-Coupled Electron Transfer Under Nanoconfinement Effect
Description:
The 3D-FeS 2 Mo 2 C aerogel is composed of chemical deposition and electrostatically driven self-assembly. FeS 2 @Mo 2 C composites exhibit excellent reusability and general applicability for Azo dyes degradation by peroxy monosulfate (PMS) under visible light irradiation. The degradation rate constant of the FeS 2 @Mo 2 C/PMS system is 11.4 times that of the PMS system and 2.6 times that of the Fe(II)+Mo 2 C+PMS Fenton-like system. The initial pH has almost no effect on the degradation rate of the FeS 2 @Mo 2 C/PMS system. The EPR results show that the FeS 2 @Mo 2 C heterostructure can effectively catalyze the production of [[EQUATION]] , [[EQUATION]] and 1 O 2 by PMS, which is in agreement with the quenching results. DFT calculations demonstrate the existence of stable S-Mo bonds in FeS 2 @Mo 2 C Schottky junctions, thus S vacancies in FeS 2 greatly accelerated the transfer of FeS 2 photogenerated electrons to Mo 2 C, FeS 2 photogenerated holes can directly oxidize Azo dyes, greatly promoting the catalytic oxidation reaction rate. The prepared mesoporous catalysts (average pore diameter = 58.13 nm) through nanoconfinement effect can effectively accelerate the transmission speed to achieve the target pollutants > 99.9% removal rate in five minutes under sufficient catalyst.This paper provides a new perspective on the application of Schottky heterojunctions coupled with photocatalytic technology for the effective degradation of Azo dyes