功能化氧化石墨烯催化CO_(2)的化学固定  

Chemical Fixation of CO_(2) Catalyzed by Functionalized Graphene Oxide

作　　者：卢金凯 张梦 李斌 董丽辉 范闽光 LU Jinkai;ZHANG Meng;LI Bin;DONG Lihui;FAN Minguang(School of Chemistry and Chemical Engineering, Guangxi University∥Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Nanning 530004, China)

机构地区：[1]广西大学化学化工学院/广西石化资源加工及过程强化技术重点实验室,南宁530004

出　　处：《华南师范大学学报（自然科学版）》2021年第3期35-42,共8页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21968002);广西石化资源加工及过程强化技术重点实验室项目(2019k006)。

摘　　要：通过一锅法将氨基官能化的咪唑离子液体嫁接在氧化石墨烯(GO)和硅铝酸盐中孔分子筛(SBA-15)上,用来催化合成环状碳酸酯.通过傅里叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)、热重分析(TGA)和元素分析(EA)对催化剂的结构、热稳定性以及氨基官能化咪唑离子液体的嫁接量进行了研究.在环加成反应过程中,GO-NH2的活性高于SBA-15-NH2.最佳条件:催化剂用量0.15 g、反应温度130℃、CO_(2)压力1.5 MPa和反应时间5 h,碳酸丙烯酯的产率达到96.46%.此外,催化剂具有可回收性并可以连续5次重复使用.The amino-functionalized imidazole ionic liquid(IL)was supported on graphene oxide(GO)and Santa Barbara Amorphous mesoporous molecular sieves(SBA-15)through the facile and simplified one-pot grafting approach to catalyze the synthesis of cyclic carbonates.The structure and thermal stability of the catalyst and the loading of the amino-functionalized imidazole IL were studied in detail with Fourier transforn infrared spectroscopy(FT-IR),scanning electron microscope(SEM),thermogravimetric analysis(TGA)and elemental analysis(EA).During the cycloaddition reaction,GO-NH2 exhibited higher activity than SBA-15-NH2.The optimum condition was 0.15 g catalyst,130℃,1.5 MPa CO_(2) pressure and 5 h of reaction time,and the yield of propylene carbonate reached 96.46%.Furthermore,the supported catalyst exhibited promising recyclability and reusability for five consecutive reuses.

关 键 词：环状碳酸酯 氧化石墨烯 离子液体 非均相催化 环氧化物 SBA-15 

分 类 号：O643.32[理学—物理化学]