石墨烯
催化作用
氧化物
反应性(心理学)
酸强度
水解
材料科学
化学
化学工程
无机化学
有机化学
纳米技术
替代医学
病理
沸石
工程类
医学
作者
Zuojun Wei,Yao Yang,Yaxin Hou,Yingxin Liu,Xiaodong He,Shuguang Deng
出处
期刊:Chemcatchem
[Wiley]
日期:2014-06-20
卷期号:6 (8): 2354-2363
被引量:72
标识
DOI:10.1002/cctc.201402100
摘要
Abstract Solid acid catalysts of graphene oxide and sulfonated graphene oxide nanosheets have been prepared by using the modified Hummers and sulfonation methods. Physical characterization indicated that a number of functional groups such as COOH, OH, O, and SO 3 H were introduced onto the surfaces of the as‐synthesized nanosheets. The catalytic performance of the synthesized catalysts was evaluated in the hydrolysis of the glycosidic bond and Fischer esterification. The experimental results indicated that the catalytic activity of the sulfonated graphene oxide was superior to that of other solid acid catalysts with the same or higher acid strength and has also exceeded that of H 2 SO 4 with 9.1 times of acid strength than that of the sulfonated graphene oxide. The high reactivity can be ascribed to the formation of hydrophobic cavities through the combination of graphene sheet and the oxygen‐containing groups on its surface, which may facilitate the catalyst to anchor with reactants and promote the attack of protons.
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