期刊
INORGANIC CHEMISTRY
卷 55, 期 10, 页码 4782-4789出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b00130
关键词
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资金
- National Natural Science Foundation of China [21501035, 21271055, 21471040]
- China Postdoctoral Science Foundation [2015M570298]
- Fundamental Research Funds for the Central Universities [HIT. IBRSEM. A.201410]
- Program for Innovation Research of Science in the Harbin Institute of Technology [B201412, B201508]
The creation of a phase junction structure in photocatalysts is a wise approach to promote photocatalytic performance, as phase junctions possess the potential to inhibit the recombination of photoinduced charge carriers. Here, Bi4V2O11 nanofibers with an alpha-beta phase junction are fabricated via electrospinning with subsequent calcination. Electrospinning offers the opportunity to keep alpha-Bi4V2O11 from transforming into beta-Bi4V2O11 completely due to an electrospinning retardation effect, leading to the formation of an alpha-beta Bi4V2O11 phase junction. Furthermore, the alpha-beta Bi4V2O11 phase junction realizes a well-established type-II band alignment. Photoelectrochemical measurements and photoluminescence spectroscopic investigations demonstrate that the phase junction structure has a significant impact on the separation and transfer of photogenerated electrons and holes. Thus, the alpha-beta phase junction on Bi4V2O11 holds the key to achieving promoted efficiency in the photocatalysis process.
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