Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 7, Pages 8201-8211Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b04872
Keywords
CO2 photoreduction; Nanocomposite; Methanol; Photocatalysis; Z-scheme; Visible light
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Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi
- DST, New Delhi [GAP-3125]
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The present paper describes an excellent improvement in photoreduction of CO2 to methanol using a newly developed rGO/InVO4/Fe2O3 Z-scheme heterostructured photocatalyst, which was readily synthesized from chitosan-functionalized reduced graphene oxide and InVO4/Fe2O3 via a facile deposition-precipitation method. The maximum yield of methanol was reached at 16.9 mmol g(-1) cat over the Z-scheme photocatalyst by using TEA as a sacrificial electron donor. The obtained yield of methanol was very much higher in comparison to the rGO, InVO4, and InVO4/Fe2O3 semiconductors, i.e., 2.3, 1.1, and 9.8 mmol g(-1) cat, respectively, under identical experimental conditions. The synergistic effect of all components in the ternary rGO/InVO4/Fe2O3 Z-scheme heterostructure resulted in efficient charge carrier separation and charge mobility on a catalyst surface which led to highly efficient CO2 reduction and excellent improvement in methanol yield.
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