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Boosting Visible-Light Photocatalytic Redox Reaction by Charge Separation in SnO2 /ZnSe(N2 H4 )0.5 Heterojunction Nanocatalysts.


ABSTRACT: In this work, environmentally friendly photocatalysts with attractive catalytic properties are reported that have been prepared by introducing SnO2 quantum dots (QDs) directly onto ZnSe(N2 H4 )0.5 substrates to induce advantageous charge separation. The SnO2 /ZnSe(N2 H4 )0.5 nanocomposites could be easily synthesized through a one-pot hydrothermal process. Owing to the absence of capping ligands, the attached SnO2 QDs displayed superior photocatalytic properties, generating many exposed reactive surfaces. Moreover, the addition of a specified amount of SnO2 boosted the visible-light photocatalytic activity; however, the presence of excess SnO2 QDs in the substrate resulted in aggregation and deteriorated the performance. The spectroscopic data revealed that the SnO2 QDs act as a photocatalytic mediator and enhance the charge separation within the type?II band alignment system of the SnO2 /ZnSe(N2 H4 )0.5 heterojunction photocatalysts. The separated charges in the heterojunction nanocomposites promote radical generation and react with pollutants, resulting in enhanced photocatalytic performance.

SUBMITTER: Kim Y 

PROVIDER: S-EPMC7496910 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Boosting Visible-Light Photocatalytic Redox Reaction by Charge Separation in SnO<sub>2</sub> /ZnSe(N<sub>2</sub> H<sub>4</sub> )<sub>0.5</sub> Heterojunction Nanocatalysts.

Kim Yeonho Y   Jeong Dong-Won DW   Lee Jaewon J   Song Min Young MY   Lee Sang Moon SM   Choi Jihoon J   Jang Du-Jeon DJ   Kim Hae Jin HJ  

Chemistry (Weinheim an der Bergstrasse, Germany) 20200720 46


In this work, environmentally friendly photocatalysts with attractive catalytic properties are reported that have been prepared by introducing SnO<sub>2</sub> quantum dots (QDs) directly onto ZnSe(N<sub>2</sub> H<sub>4</sub> )<sub>0.5</sub> substrates to induce advantageous charge separation. The SnO<sub>2</sub> /ZnSe(N<sub>2</sub> H<sub>4</sub> )<sub>0.5</sub> nanocomposites could be easily synthesized through a one-pot hydrothermal process. Owing to the absence of capping ligands, the attached  ...[more]

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