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Hierarchical CsPbBr3 Nanocrystal Decorated ZnO Nanowires/Macroporous Graphene Hybrids for Enhancing Charge Separation and Photocatalytic CO2 Reduction

Abstract

Solar-driven CO2 conversion for chemical fuel production has been regarded as an effective strategy to alleviate the environmental and energy issues. In this study, we construct a novel composite catalyst film in which the CsPbBr3 nanocrystals (NCs) are loaded on a hierarchical branched ZnO nanowires (BZNW)/macroporous graphene scaffold (CsPbBr3 NC/BZNW/MRGO). Such well-designed multi-dimensional architecture rationally integrates excellent visible-light absorption capability of CsPbBr3 NC, fast charge transport as well as improved CO2 capture ability afforded by the ZnO nanowire-branched macroporous graphene. By virtue of such favorable synergestic effect, a boosted photocatlaytic performance has been achieved with a photoelectron consumption rate of 52.02 μmol gcat-1 h-1 under visible light irradiation, which is 4.98 and 1.65 times higher than that of CsPbBr3 NC (10.44 μmol gcat-1 h-1) and CsPbBr3 NC/MRGO (31.52 μmol gcat-1 h-1), respectively. What’s more, a desirable CH4 selectivity up to 96.7% is achieved.

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Publication details

The article was received on 02 Apr 2019, accepted on 07 May 2019 and first published on 08 May 2019


Article type: Paper
DOI: 10.1039/C9TA03478A
J. Mater. Chem. A, 2019, Accepted Manuscript

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    Hierarchical CsPbBr3 Nanocrystal Decorated ZnO Nanowires/Macroporous Graphene Hybrids for Enhancing Charge Separation and Photocatalytic CO2 Reduction

    Y. Jiang, J. Liao, Y. Xu, H. Chen, X. Wang and D. Kuang, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA03478A

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