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Construction of α-Fe2O3-NPs@AgVO3-NRs Z-scheme heterojunction: An efficient photo(electro)catalyst for Cr(VI) reduction and oxygen evolution reactions under visible-light by Anuradha Chowdhury; Sridharan Balu; Thomas C.-K. Yang is a Environmental Science article available to read on EtoBox.

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In this work, we have prepared a mesoporous α-Fe2O3-NPs@AgVO3-NRs (0D/1D) Z-scheme semiconductor photocatalytic system for energy production and environmental remediation applications. The AgVO3-nanorods were prepared by the co-precipitation method, whereas α-Fe2O3-NPs were prepared via the hydrothermal method, and a α-Fe2O3@AgVO3 heterojunction was synthesized through the wet-impregnation method. The porous structure of α-Fe2O3@AgVO3 nanocomposite provides more surface-active sites for oxygen evolution reaction (OER) and facilitates mass transfer at the contact between α-Fe2O3-NPs and AgVO3-NRs. UV-DRS and photoluminescence showed that the α-Fe2O3@AgVO3 catalyst exhibits excellent visible light trapping capability, broadening the spectral absorption range and extending the life of photoinduced carriers. The synergetic effect of an α-Fe2O3-NPs@AgVO3-NRs core-shell-like heterojunction increases the specific surface area, light harvesting capability, and excellent charge separation. As a result, the optimal α-Fe2O3@AgVO3 photocatalyst displayed excellent photoreduction efficiency of 94.27% towards Cr(VI) within 20 min. Also, α-Fe2O3-NPs@AgVO3-NRs exhibited an OER overpotential of 1.0

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Author

Anuradha Chowdhury; Sridharan Balu; Thomas C.-K. Yang

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)