Visible light active Bi3TaO7 nanosheets for water splitting
| Autor: | Miho Yamauchi, Hadi Razavi-Khosroshahi, Sara Mohammadzadeh, Masayoshi Fuji, Sho Kitano, Mirabbos Hojamberdiev |
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| Rok vydání: | 2019 |
| Předmět: |
Electron mobility
Materials science 010405 organic chemistry Band gap business.industry 010402 general chemistry Photochemistry 01 natural sciences 0104 chemical sciences Tantalate Inorganic Chemistry Semiconductor Photocatalysis Water splitting business Photocatalytic water splitting Visible spectrum |
| Zdroj: | Dalton Transactions. 48:9284-9290 |
| ISSN: | 1477-9234 1477-9226 |
| Popis: | Tantalate semiconductors are potential photocatalysts for hydrogen generation via photocatalytic water splitting reaction because the conduction band of tantalates is composed of the tantalum 5d orbital, which is located at a more negative potential than that of the H+/H2 half reaction, i.e., 0.0 V vs. NHE. Bi3TaO7 is a stable tantalate under acidic or alkaline conditions, with a band gap suitable for visible light absorption. However, the photocatalytic properties of Bi3TaO7 are only reported based on the dye degradation reactions, probably due to the fast electron/hole recombination losses. 2D crystal-like nanosheets with a thickness of a few nanometers show unique features such as high carrier mobility, the quantum Hall effect, high specific surface area, and excellent electrical/thermal conductivity. 2D structures can also enhance the photocatalytic properties because photo-generated charge carriers in nanosheets are less prone to fast recombinations as compared to their bulk counterparts. In this study, nanosheets of Bi3TaO7 are produced by a liquid exfoliation method and the photocatalytic hydrogen generation reaction is investigated for both the as-synthesized Bi3TaO7 nanoparticles and Bi3TaO7 nanosheets. |
| Databáze: | OpenAIRE |
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