Organic salt-assisted liquid-phase exfoliation of graphite to produce high-quality graphene
Organic salt-assisted liquid-phase exfoliation of graphite to produce high-quality graphene
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DOI：
10.1016/j.cplett.2013.03.060
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发表时间：
2013-05-01
影响因子：
2.8
通讯作者：
Jiang, Xiaoqing
中科院分区：
文献类型：
--
作者：
Du, Wencheng;Lu, Jie;Jiang, Xiaoqing
乙二胺四乙酸二钠、酒石酸钠、酒石酸钾钠和柠檬酸钠等常见有机盐对石墨在常见有机溶剂中的液相剥离具有普遍而有效的辅助作用。当柠檬酸钠引入到由天然石墨粉和二甲基亚砜组成的剥离体系中时，观察到高达123倍的剥离效率。TEM、AFM、拉曼光谱、EDX、TGA和FTIR分析表明石墨被成功剥离成单层或少层石墨烯纳米片，其没有缺陷和氧化物。该方法简单、有效、安全、经济。(C)2013爱思唯尔有限公司版权所有。
Certain ordinary organic salts, such as edetate disodium, sodium tartrate, potassium sodium tartrate and sodium citrate were found to have universal and efficient assistant effect for liquid-phase exfoliation of graphite in common organic solvents to produce pristine graphene. Up to 123 times enhanced exfoliation efficiency was observed when sodium citrate was introduced into an exfoliation system consisting of natural graphite powder and dimethyl sulfoxide. TEM, AFM, Raman spectroscopy, EDX, TGA, and FTIR analysis showed graphite was successfully exfoliated into single or few-layer graphene nanosheets which were free of defects and oxides. The method is simple, effective, safe and economical. (C) 2013 Elsevier B.V. All rights reserved.