One-pot synthesized multi-functional graphene oxide as a water-tolerant and efficient metal-free heterogeneous catalyst for cycloaddition reaction

被引:105
作者
Lan, Dong-Hui [1 ]
Chen, Lang [1 ]
Au, Chak-Tong [1 ,2 ]
Yin, Shuang-Feng [1 ]
机构
[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[2] Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong, Peoples R China
关键词
CYCLIC CARBONATES; CHEMICAL FIXATION; CO2; DIOXIDE; ACID; ACTIVATION; CONVERSION; REDUCTION; COMPLEXES; EPOXIDES;
D O I
10.1016/j.carbon.2015.05.023
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A series of functional graphene oxide (F-GO) materials were prepared by silylanization of graphene oxide (GO) with chlorine-terminal silanes and subsequent nucleophilic substitution reaction with tertiary amine in a one-pot approach. The quaternary ammonium salt was generated and immobilized simultaneously in situ, and the primary amine is beneficial to improve the number of surface functionalities on GO. This is the first time that a multi-functional GO material was designed, prepared and used for the synthesis of cyclic carbonates through the cycloaddition of carbon dioxide (CO2) to epoxides. The F-GO catalyst can be easily separated and reused for at least five times without significant loss of activity (TOF = 46.4 h(-1)). The excellent performance is attributed to the synergetic effect of silanol group and halide anion for ring opening of epoxide as well as the role of amine for CO2 adsorption and activation. A possible mechanism is proposed for the cycloaddition reaction over F-GO. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:22 / 31
页数:10
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