聚吡咯
插层(化学)
剥脱关节
二硫化钨
纳米复合材料
材料科学
热稳定性
单层
聚合
化学工程
石墨烯
电导率
电阻率和电导率
高分子化学
化学
聚合物
无机化学
复合材料
纳米技术
物理化学
工程类
电气工程
作者
Bai-Huan Xu,Bi-Zhou Lin,Zhijian Chen,Xiaoli Li,Qinqin Wang
标识
DOI:10.1016/j.jcis.2008.10.033
摘要
Lithium intercalated tungsten disulfide LixWS2 with x>1 was solvothermally obtained. It was revealed that LixWS2 can remain mostly unchanged under vacuum (about 4 kPa) for 5 days. The pH dependences of surface ζ potential for single molecular layers of WS2 were determined, illustrating that its isoeletric point is approximately at pH 3. The polypyrrole/WS2 layered nanocomposites were prepared via the combination of the exfoliation-restacking technique and in situ oxidative polymerization. The intercalation of PPy into the host galleries resulted in an interlayer expansion of about 3.7 Å, which suggested that the intercalated polymeric chains are in a monolayer arrangement with the pyrrole rings lying parallel to the WS2 host layers. The resulting material shows good thermal stability with the decomposition of the interacted chains within the disulfide galleries occurring at around 400 °C. The electrical conductivity of PPy/WS2 nanocomposite was found to be high in the order of 10−2 S cm−1 at ambient temperature.
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