Vertically-heterostructured TiO2-Ag-rGO ternary nanocomposite constructed with {001} facetted TiO2 nanosheets for enhanced Pt-free hydrogen production |
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| Authors: | Zhouyou Wang Ze-Xian Low Xiangkang Zeng Bin Su Yichun Yin Chenghua Sun Tim Williams Huanting Wang Xiwang Zhang |
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| Affiliation: | 1. Department of Chemical Engineering, Monash University, VIC 3800, Australia;2. ARC Centre of Excellence for Electromaterials Science, School of Chemistry, Monash University, VIC 3800, Australia;3. Department of Chemistry and Biotechnology, Faculty of Science, Engineering & Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia;4. Monash Centre for Electron Microscopy, Monash University, Clayton, Victoria 3800, Australia |
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| Abstract: | TiO2 nanosheets with high ratio of {001} facets were coupled with reduced graphene oxide (rGO) nanosheets through the link of silver (Ag) nanoparticles, forming a novel ternary nanocomposite photocatalyst with a vertical heterostructure, TiO2-Ag-rGO. The vertical anchoring of TiO2-Ag nanosheets between rGO sheets was confirmed by transmission electron microscopy (TEM), Raman spectroscopy, energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). Due to excellent separation of electron-hole pairs in the TiO2 nanosheets, enhanced electron transfer to rGO via Ag nanoparticles, the TiO2-Ag-rGO nanocomposite exhibited an outstanding performance in photocatalytic hydrogen production, with a hydrogen production rate of 593.56 μmol g?1 h?1. This study provides new insights to the development of Pt-free photocatalysts for hydrogen production. |
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| Keywords: | Ternary nanocomposite {001} facets Hydrogen production |
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