磺酸化石墨烯固体酸催化剂酯化反应催化性能研究.doc

文档介绍：
磺酸化石墨烯固体酸催化剂酯化反应催化
性能研究#
吉俊懿,董虹序,李阳,范晓彬**
5
10
(天津大学化工学院,天津 300072)
摘要:本研究利用石墨烯片层良好的化学稳定性,使用自由基加成的方法将对苯磺酸基团通
过共价键连接的方式接载在石墨烯片层表面,并作为石墨烯基固体酸催化剂进行酯化反应
的探索。对石墨烯、磺酸化氧化石墨烯以及磺酸化石墨烯进行 SEM,EDS,XPS 等分析,
证明了对苯磺酸自由基的成功加成,而磺酸化石墨烯相比磺酸化氧化石墨烯具有更高的自
由基加成量。通过催化酯化活性的测试,也证明了磺酸化石墨烯具有更加优异的酸催化性
能,是一种更加优良的固体酸催化剂。
关键词:石墨烯;自由基加成;固体酸;酯化反应
中图分类号:TB34
15
Catalytic Performance of Sulfonated Graphene as Solid Acid
Catalyst in Esterification Reaction
JI Junyi, DONG Hongxu, LI Yang, FAN Xiaobin
(School of Chemical Engineering and Technology,Tianjin University, Tianjin, 300072)
20
25
30
35
40
Abstract: In this paper, phenylsulfonic acid groups are covalent bonded onto the graphene sheets
via free-radical addition reaction. Take advantage of the chemical stability of graphene flakes and
the sulfonic groups as active cites, sulfonated graphene is used as a solid acid catalyst for
esterifucation reaction. The element content of the graphene, sulfonated graphene oxide and
sulfonated graphene is analysised by SEM, EDS and XPS, and the acid catalysis activity is tested
by esterification reaction. The result reveals that the sulfonated graphene contains higher
phenylsulfonic acid groups and shows higher catalytic activity.
Key words: Graphene; Free-radical addition; Solid acid catalyst; Esterification Reaction
0 引言
石墨烯是由碳原子之间以 sp2 杂化的方式紧密排列组成的六元蜂窝状晶体二维片状结构
[1]
106 S/m)、力学(抗拉强度和