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Indirect Z-scheme assembly of 2D ZnV2O6/RGO/g-C3N4 nanosheets with RGO/pCN as solid-state electron mediators toward visible-light enhanced CO2 reduction

Bafaqeer, Abdullah and Tahir, Muhammad and Khan, Azmat Ali and Saidina Amin, Nor Aishah (2019) Indirect Z-scheme assembly of 2D ZnV2O6/RGO/g-C3N4 nanosheets with RGO/pCN as solid-state electron mediators toward visible-light enhanced CO2 reduction. Industrial and Engineering Chemistry Research, 58 (20). pp. 8612-8624. ISSN 0888-5885

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Official URL: http://dx.doi.org/10.1021/acs.iecr.8b06053

Abstract

Indirect Z-scheme assembly of graphene-bridged 2D ZnV2O6/pCN nanosheets composite has been fabricated by one-step solvothermal process and tested for photoinduced CO2 conversion under visible-light irradiations. The highest CH3OH production of 3488 μmol g-cat−1 was obtained over ZnV2O6/RGO/g-C3N4 composite, 1.02 and 1.25 times higher comparing to ZnV2O6/RGO and ZnV2O6/g-C3N4 samples, respectively. This enhanced efficiency can be ascribed to well-designed ternary heterojunction with hierarchical structure and efficient charges separation by RGO. More importantly, CH3OH yield was further improved by introducing RGO/pCN as an electron sink, which led to a 1.07 times higher yield than using only RGO. This reveals that ternary 2D ZnV2O6/RGO/pCN nanostructure has higher visible-light absorption, improved charge separation, and enhanced photocatalytic efficiency due to RGO/pCN as multiple mediators. The stability of composite catalyst also prevailed for 32 h for continuous CH3OH production. Therefore, structured Z-scheme composite with multiple electron mediators enables efficient CO2 conversion under visible-light irradiation.

Item Type:Article
Uncontrolled Keywords:enhanced efficiency, hierarchical structures, photocatalytic efficiency
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:88255
Deposited By: Yanti Mohd Shah
Deposited On:15 Dec 2020 08:19
Last Modified:15 Dec 2020 08:19

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