期刊
ANALYST
卷 140, 期 13, 页码 4654-4661出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5an00641d
关键词
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资金
- National Natural Science Foundation of China [31270988]
- Undergraduate Innovational Experimentation Program of Xiangtan University [2014xtuxj40]
- Scientific Research Fund of Hunan Provincial Education Department [13B120]
- China Postdoctoral Science Foundation [2014M562118]
- Hunan Provincial Natural Science Foundation of China [2015JJ2133]
Bulk MoS2, a prototypical transition metal chalcogenide material, is an indirect band gap semiconductor with negligible photoluminescence. In this study, we have developed, for the first time, a simple and low-cost synthetic strategy to prepare boron- and nitrogen-doped MoS2 (B, N-MoS2) nanosheets. Through boron and nitrogen doping, the band gap of MoS2 increases from 1.20 eV to 1.61 eV, and the obtained B, N-MoS2 nanosheets exhibit an enhanced fluorescence. The B, N-MoS2 nanosheets can be used as a green and facile sensing platform for label-free detection of Hg2+ because of their high sensitivity and selectivity toward Hg2+. In addition, detection can be easily accomplished through one-step rapid (within 2 min) operation, with a limit as low as 1 nM. This study demonstrates that the introduction of boron and nitrogen elements into ultrathin MoS2 nanosheets for enhanced fluorescence properties is feasible through a facile and general preparation strategy and may also offer a unique idea as a potential way to design more efficient MoS2-based sensors and fluorescent materials.
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