材料科学
二硫化钼
量子点
二硫化钨
单层
过电位
纳米技术
化学工程
电化学
物理化学
化学
电极
工程类
冶金
作者
Shengjie Xu,Dian Li,Peiyi Wu
标识
DOI:10.1002/adfm.201403863
摘要
In this work, uniform molybdenum disulfide (MoS 2 )/tungsten disulfide (WS 2 ) quantum dots are synthesized by the combination of sonication and solvothermal treatment of bulk MoS 2 /WS 2 at a mild temperature. The resulting products possess monolayer thickness with an average size about 3 nm. The highly exfoliated and defect‐rich structure renders these quantum dots plentiful active sites for the catalysis of hydrogen evolution reaction (HER). The MoS 2 quantum dots exhibit a small HER overpotential of ≈120 mV and long‐term durability. Moreover, the strong fluorescence, good cell permeability, and low cytotoxicity make them promising and biocompatible probes for in vitro imaging. In addition, this work may provide an alternative facile approach to synthesize the quantum dots of transition metal dichalcogenides or other layered materials on a large scale.
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