Preparation and characterization of silylated graphite oxide
Preparation and characterization of silylated graphite oxide
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DOI：
10.1016/j.carbon.2005.06.006
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发表时间：
2005-11-01
期刊：
影响因子：
10.9
通讯作者：
Sugie, Y
中科院分区：
文献类型：
--
作者：
Matsuo, Y;Tabata, T;Sugie, Y
在正丁胺和甲苯存在下，用不同的烷基氯硅烷对氧化石墨进行硅烷化，得到了新型的插层化合物。硅原子上含两个或三个氯原子的硅烷化试剂与氧化石墨发生反应，而只有一个氯原子的硅烷化试剂不发生反应。硅烷化试剂主要与氧化石墨的羟基反应，形成Si-O键。正丁胺的作用不仅是剥离氧化石墨层，而且还能清除引起氧化石墨分解的HCl分子。硅含量几乎是恒定的约0.6摩尔/氧化石墨的样品sitylated烷基三氯硅烷与较短的烷基链长度。随着烷基链长的增加，其最高可达1.7mol/氧化石墨。较高的硅含量可以归因于在硅烷基化试剂的硅原子上形成的羟基上的进一步硅烷基化，所述硅烷基化试剂键合到氧化石墨上，桥接两个硅烷基化试剂。(C)2005爱思唯尔有限公司保留所有权利。
Graphite oxide was silylated by various alkylchlorosilanes in the presence of butylamine and toluene, and new intercalation compounds were obtained. The silylating reagents with two or three chlorine atoms at silicon in them reacted with graphite oxide, while no reaction occurred when silylating reagents with only one chlorine atom was used. The silylating reagent mainly reacted with hydroxyl group of graphite oxide, forming Si-O bonding. The role of butylamine was not only exfoliating graphite oxide layer but also scavenging HCl molecule which Caused the decomposition of silylated graphite oxide. The silicon content was almost constant approximate to 0.6 mol/graphite oxide for the samples sitylated by alkyltrichlorosilane with shorter alkyl chain lengths. It increased with the increase of alkyl chain length and reached 1.7 mol/graphite oxide. The higher silicon content Could be ascribed to further silylation on hydroxyl groups formed at silicon atoms of silylating reagent bonded to graphite oxide, bridging two silylating reagents. (C) 2005 Elsevier Ltd. All rights reserved.