A label-free fluorescent probe for Hg2+ based on boron- and nitrogen-doped photoluminescent WS2

作者：Feng, Bo^*; Liu, Xiaojia; Zheng, Yizhi; Xiao, Qian; Wu, Na; Wang, Suiping

来源：RSC Advances, 2016, 6(55): 49668-49674.

DOI：10.1039/c5ra27327g

• CARBON NANOPARTICLES
• MOS2
• CHEMOSENSOR
• TRANSPORT
• GREEN
• WATER
• IONS

The air-stable doping of transition-metal dichalcogenides is important in enabling a wide range of optoelectronic and electronic devices while exploring basic material properties. In this work, we develop for the first time a simple, low-cost synthesis route to preparing boron-and-nitrogen-doped WS2 (B, N-WS2) nanosheets. Bulk WS2, a prototypical transition-metal chalcogenide material, is an indirect band-gap semiconductor with negligible photoluminescence. The obtained B, N-WS2 nanosheets exhibited enhanced fluorescence. The B, N-WS2 nanosheets can be used as a green and easy sensing platform for the label-free detection of Hg2+ because of the high sensitivity and selectivity toward Hg2+. Detection can also be easily accomplished through a rapid, one-step (within 1 min) operation, with a limit as low as 23 nM (S/N = 3).

• 出版日期2016
• 单位湘潭大学