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- W2954253090 abstract "Type I heterojunction films of α-Fe2 O3 /ZnO are reported here as a non-titania based photocatalyst, which shows remarkable enhancement in the photocatalytic properties towards stearic acid degradation under UVA-light exposure (λ=365 nm), with a quantum efficiency of ξ=4.42±1.54×10-4 molecules degraded/photon, which was about 16 times greater than that of α-Fe2 O3 , and 2.5 times greater than that of ZnO. Considering that the degradation of stearic acid requires 104 electron transfers for each molecule, this represents an overall quantum efficiency of 4.60 % for the α-Fe2 O3 /ZnO heterojunction. Time-resolved transient absorption spectroscopy (TAS) revealed the charge-carrier behaviour responsible for this increase in activity. Photogenerated electrons, formed in the ZnO layer, were transferred into the α-Fe2 O3 layer on the pre-μs timescale, which reduced electron-hole recombination. This increased the lifetime of photogenerated holes formed in ZnO, which oxidise stearic acid. The heterojunction α-Fe2 O3 /ZnO films grown herein show potential environmental applications as coatings for self-cleaning windows and surfaces." @default.
- W2954253090 created "2019-07-12" @default.
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- W2954253090 date "2019-08-01" @default.
- W2954253090 modified "2023-10-18" @default.
- W2954253090 title "Heterojunction α‐Fe <sub>2</sub> O <sub>3</sub> /ZnO Films with Enhanced Photocatalytic Properties Grown by Aerosol‐Assisted Chemical Vapour Deposition" @default.
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- W2954253090 doi "https://doi.org/10.1002/chem.201902175" @default.
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