Enhanced Exfoliation Effect of Solid Auxiliary Agent On the Synthesis of Biofunctionalized MoS₂ Using Grindstone Chemistry

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• 作者：Jing Wang ; Wentao Zhang ; Yanru Wang ; Wenxin Zhu ; Daohong Zhang ; Zhonghong Li and Jianlong Wang
• 刊名：Particle & Particle Systems Characterization
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：33
• 期：11
• 页码：825-832
• 全文大小：1668K
• ISSN：1521-4117

文摘

Mass production and commercial availability are prerequisites for the viability and wide application of MoS₂. Here, we demonstrate enhanced grindstone chemistry for a one-step synthesis of biofunctionalized MoS₂. By adding a SiO₂ auxiliary agent the exfoliation efficiency increases from 16.23% to 58.59% and a rapid and high-yield exfoliation of MoS₂ is seen. SiO₂ exhibits a fragmentation effect, which reduces the lateral size and facilitates the exfoliation of MoS₂, thus inducing a high-efficient paradigm in the top-down fabrication of biofunctionalized MoS₂ nanosheets. The as-prepared MoS₂-chitosan (MoS₂-CS) nanosheets display complete disaggregation and homogeneous dispersion, as well as a high content of chitosan (ca. 20 wt%). As a proof-of-concept application, the MoS₂-CS nanosheets act as a biosorbent for Pb^II removal, exhibiting a good adsorption capacity and recyclability. This green and facile enhanced grindstone chemistry with minimal use of organic solvents and high-throughput efficiency can be extended to the fabrication of other biocompatible inorganic 2D analogues for a variety of applications.