一种改进的MoS_2二维纳米片的高效液相剥离方法  

An improved liquid-phase exfoliation method for efficient preparation of 2D MoS_2 nanosheets

作　　者：孙贞燚 白露[1] 包睿莹[1] 杨鸣波[1] 杨伟[1] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065

出　　处：《功能材料》2017年第9期9171-9174,共4页Journal of Functional Materials

基　　金：国家自然科学基金优秀青年基金资助项目(51422305)

摘　　要：报道了一种改进的液相剥离方法以实现MoS_2二维纳米片的高效制备。在MoS_2球磨的过程中引入轻质CaCO_3粒子作为微磨球,引入少量N-甲基吡咯烷酮作分散剂,在400r/min下球磨一定时间得到充分研磨细化的MoS_2纳米粒子。将其与含适量HCl的45%的酒精水溶液充分混合后,再进行高速剪切液相剥离,可实现MoS_2二维纳米片的高效制备。利用纳米粒度仪、AFM、TEM、拉曼光谱等对所制得的MoS_2二维纳米片进行了表征。结果表明,这种改进的球磨结合高速剪切的液相剥离方法可获得的最高产量达54.43mg/mL。An improved liquid-phase exfoliation method for the preparation of MoS2 2D nanosheets combined ball- milling and high-speed shearing was reported. During the ball-milling process, CaCO3 particles were incorporated as micro milling balls and drops of NMP was also added as liquid lubrication. The mixture of MoS2, CaCO3 and NMP was ball-milled at 400rpm for a certain time. After that, the mixture was washed and dissolved in 45% ethanol/water with proper amount of HCl to get rid of CaCO3. Then high-speed shearing was used to exfoliate the ball-milled MoS2 nanoparticles, and high-speed centrifugation was used to precipitate the bulk MoS2 particles in the mixture, thus the supernatant full of MoS2 nanosheets was obtained. Malvern Zetasizer, SEM, AFM, TEM, Raman was used to characterize the obtained MoS2 nanosheets. It turned out that the MoS2 2D nanosheets were successfully obtained using this method, and the highest yield 54.43 mg/ml was achieved.

关 键 词：MoS2二维纳米片 液相剥离 

分 类 号：TB332[一般工业技术—材料科学与工程]