Boosting visible-light photocatalytic redox reaction by charge separation in SnO2/ZnSe(N2H4)0.5 heterojunction nanocatalysts.

Boosting visible-light photocatalytic redox reaction by charge separation in SnO2/ZnSe(N2H4)0.5 heterojunction nanocatalysts. Chemistry. 2020 Mar 24;: Authors: Kim Y, Jeong DW, Lee J, Song MY, Lee SM, Choi J, Jang DJ, Kim HJ Abstract Herein, we report environmental photocatalysts with attractive catalytic properties prepared by introducing SnO 2 quantum dots (QDs) directly attached onto ZnSe(N 2 H 4 ) 0.5 substrates to induce advantageous charge separation. The SnO 2 /ZnSe(N 2 H 4 ) 0.5 nanocomposites could be easily synthesized via a one-pot hydrothermal process. Owing to the absence of capping ligands, the attached SnO 2 QDs displayed superior photocatalytic properties, generating many exposed reactive surfaces. Moreover, the addition of a specified amount of SnO 2 boosted the visible-light photocatalytic activity; however, the presence of excess SnO 2 QDs in the substrate resulted in aggregation and deteriorated the performance. The spectroscopic data revealed that the SnO 2 QDs act as a photocatalytic mediator and enhance the charge separation within the type-II band alignment system of the SnO 2 /ZnSe(N 2 H 4 ) 0.5 heterojunction photocatalysts. The separated charges in the heterojunction nanocomposites promote radical generation and react with pollutants, resulting in enhanced photocatalytic performance. PMID: 32212176 [PubMed - as supplied by publisher]
Source: Chemistry - Category: Chemistry Authors: Tags: Chemistry Source Type: research