1. 2D/0D Bi2MoO6 nanosheets/BN quantum dots photocatalysts with enhanced charge separation for efficient elimination of antibiotic
- Author
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Haifeng Shi, Zicheng Zhai, Tongyu Han, Kaixu Ren, and Wenli Zhao
- Subjects
Nanocomposite ,Materials science ,General Physics and Astronomy ,Heterojunction ,02 engineering and technology ,Surfaces and Interfaces ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,Redox ,0104 chemical sciences ,Surfaces, Coatings and Films ,Catalysis ,Chemical engineering ,Quantum dot ,Photocatalysis ,Charge carrier ,0210 nano-technology - Abstract
Photocatalytic activity is mainly limited by recombination of photogenerated carriers and insufficient active sites, which would restrain the efficiency of photocatalytic redox reactions. Herein, 2D/0D heterojunctions of Bi2MoO6 nanosheets/BN quantum dots (BM/BNQDs) were prepared via a simple hydrothermal method, which exhibited enhanced photocatalytic performance for the tetracycline (TC) degradation under visible-light irradiation. Combing small-size BNQDs in the average diameter of ~ 5 nm with BM nanosheets displayed tremendous advantages such as rapid charge transport and sufficient active sites. Notably, the as-synthesized BNQDs acting as the photoinduced hole extractors effectively dispersed photogenerated holes and electrons, facilitating the apparent rate constant exhibited by the BM/2BNQDs catalyst 3.1 times that of pure BM. Moreover, PL and electrochemical test results indicated that the separation and transfer of photogenerated charge carriers were enhanced after introducing BNQDs in BM nanosheets. And this work is expected to provide design ideas and insights for the development of efficient photocatalysts based on 2D/0D nanocomposites.
- Published
- 2021