Zn-doped hematite modified by graphene-like WS2: A p-type semiconductor hybrid photocathode for water splitting to produce hydrogen |
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| Authors: | Dongmei Chu Kezhen Li Aijuan Liu Jie Huang Chunyong Zhang Ping Yang Yukou Du Cheng Lu |
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| Affiliation: | 1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China;2. Department of Chemistry, University of Toronto, Toronto, Ontario, M5S 3H6, Canada |
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| Abstract: | A p-type Zn-doped hematite (α-Fe2O3(Zn)) in spindle-shape with an acceptor density of ca. 4.21 × 1018 cm?3 were synthesized by a facile hydrothermal method. After α-Fe2O3(Zn) was modified with graphene-like WS2 (α-Fe2O3(Zn)/WS2), the photoelectrochemical performances of the composite can be further enhanced. A photocell composed of the p-type α-Fe2O3(Zn)/WS2 nanocomposite as photocathode and n-type α-Fe2O3 as photoanode was assembled to estimate the photocatalytic activity of α-Fe2O3(Zn)/WS2. The amount of the hydrogen and oxygen produced from this tandem cell with the optimal electrodes under 2 h simulated solar light irradiation is 12.5 μmol and 4.3 μmol, respectively. |
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| Keywords: | Photoelectrochemical tandem cell Water splitting Hydrogen production |
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