Electrically Conductive Poly(vinyl alcohol) Hybrid Films Containing Graphene and Layered Double Hydroxide Fabricated via Layer-by-Layer Self-Assembly
Electrically Conductive Poly(vinyl alcohol) Hybrid Films Containing Graphene and Layered Double Hydroxide Fabricated via Layer-by-Layer Self-Assembly
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DOI：
10.1021/am100307v
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发表时间：
2010-07-01
影响因子：
9.5
通讯作者：
Li, Jing
中科院分区：
文献类型：
--
作者：
Chen, Dan;Wang, Xiaoyan;Li, Jing
在这项工作中，通过剥离高度结晶的 Co-Al-NO3 LDH 制备了单层层状双氢氧化物 (LDH) 纳米片。氧化石墨烯（GO）纳米片是通过在水中剥离天然石墨氧化物制备的。利用氢键层层自组装方法，制备了具有高度取向的GO和LDH的聚乙烯醇（PVA）杂化薄膜。通过简单有效的原位还原过程，可以获得含有单层分散石墨烯和LDH的多层纳米复合材料薄膜。研究发现，石墨烯纳米片内的π共轭网络在还原过程中逐渐恢复，并获得了电子转移导电路径形成的关键时间。与未还原的混合薄膜相比，相对完整的还原混合薄膜表现出显着提高的电导率。这些具有单层分散和排列的石墨烯和LDH的异质复合薄膜有望在电极和多功能纳米复合材料中找到潜在的应用。
In this work, single-layer layered double hydroxide (LDH) nanosheets were prepared by exfoliation of highly crystalline Co-Al-NO3 LDH. Graphene oxide (GO) nanosheets were prepared by the exfoliation of natural graphite oxides in water. By utilizing the hydrogen-bonding layer-by-layer self-assembly method, poly(vinyl alcohol) (PVA) hybrid films with highly oriented GO and LDH were fabricated. By a simple and effective in situ reduction process, multilayer nanocomposite films containing monolayer dispersed graphene and LDHs can be obtained. It was Found that the pi-conjugation network within the graphene nanosheets was gradually recovered during the reduction process and a critical time for the formation of conductive paths for electron transfer was obtained. The relatively complete reduced hybrid film exhibited significantly improved electrical conductivity compared with the unreduced one. These heterogeneous composite films with monolayer dispersed and aligned graphene and LDHs are expected to find potential applications in electrodes and multifunctional nanocomposites.