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Enhanced Z-scheme Photocatalytic Activity of Conjugated π Heterojunction: MIL-53(Fe)/Ag/g-C3N4

Abstract

Remarkably competent visible light induced MIL-53(Fe)/Ag/g-C3N4 photocatalysts were fabricated by a facile ultrasonic technique. MIL-53(Fe)/Ag/g-C3N4 shows Z scheme charge transfer system, which performs excellent photocatalytic activity in contrast to pristine catalysts with an exposure to visible-light (λ>400 nm). Clioquinol was chosen as target pollutant. Photoluminescence analysis shows that the establishment of varying weight % of Ag/g-C3N4 with MIL-53(Fe) improves the segregation and transfer rate of photo-generated excitons and correspondingly results in the Z-scheme charge transfer system. Time dependent density functional theory calculations were also employed for both MIL-53(Fe) and g-C3N4 to predict the π conjugated system interaction in the heterojunction. Morphology, crystallinity and material opto-electronic properties were explained in order to analyze the photoelectric behavior of the photocatalyst. Cluster charges for both MIL-53(Fe) and g-C3N4 and their interactions were theoretically calculated to predict the charge distribution between these clusters. Based on the theoretical and experimental calculations, mechanism of photodegradation for Z-scheme system has also been proposed.

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Publication details

The article was accepted on 17 Sep 2018 and first published on 03 Oct 2018


Article type: Paper
DOI: 10.1039/C8NJ04080J
Citation: New J. Chem., 2018, Accepted Manuscript
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    Enhanced Z-scheme Photocatalytic Activity of Conjugated π Heterojunction: MIL-53(Fe)/Ag/g-C3N4

    S. K. Patra, S. Rahut and J. K. Basu, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ04080J

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