氮化碳与介孔氧化硅协同催化CO_(2)环加成研究  

Synergistic Catalysis by Carbon Nitride and Mesoporous Silica for CO_(2)Cycloaddition

作　　者：王忠华[1] 唐丽[1] 黄春霞 邵守言[1] 符微微 吴杰[2] WANG Zhong-hua;TANG Li;HUANG Chun-xia;SHAO Shou-yan;FU Wei-wei;WU Jie(Jiangsu SOPO Chemical Co.Ltd.,Zhenjiang 212006,China;Institute of Chemistry Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]江苏索普(集团)有限公司,江苏镇江212006 [2]中国科学院化学研究所,北京100190

出　　处：《安徽化工》2022年第6期76-80,共5页Anhui Chemical Industry

摘　　要：CO_(2)的资源化利用是实现碳减排的重要手段。石墨相氮化碳(CN)可催化CO_(2)与环氧化合物环加成制备环状碳酸酯。为提高CN的催化活性,通过浸渍、高温焙烧,将其负载在介孔氧化硅纳米球(MSN)的孔道中。对所得CN/MSN的形貌、晶体结构、化学组成和表面功能基团进行了表征。结果表明,CN/MSN的比表面积高达621.3 m^(2)·g^(-1),具有发达的介孔结构,含有大量的胺基和羟基基团。评价了CN/MSN催化CO_(2)与环氧环加成的性能。在140℃,3.5 MPa的CO_(2),50 mg催化剂,1 mol%的ZnBr_(2)和10 mL环氧氯丙烷的条件下反应3 h,转化率为95.4%,揭示了CN与硅羟基的协同催化作用是CN/MSN高活性的主要原因。The resource utilization of CO_(2)is an important route to reduce carbon emission.Cycloaddition of CO_(2)and epoxy compounds to prepare cyclic carbonates can be catalyzed by graphitic carbon nitride(CN).In order to improve the catalytic activity,CN was loaded into the pores of mesoporous silica nanospheres(MSN)by impregnation and high temperature calcination.The morphology,crystal structure,chemical composition and surface functional groups of the obtained CN/MSN were characterized.The results demonstrate that CN/MSN shows a high specific surface area of 621.3 m^(2)·g^(-1),developed mesoporous structure and rich amino and hydroxyl groups.The catalytic performance of CN/MSN for cycloaddition of CO_(2)and epoxy was evaluated.Under the conditions of 140℃,3.5 MPa of CO_(2),50 mg of catalyst,1 mol%of ZnBr_(2)and 10 mL of epichlorohydrin,the conversion rate reaches 95.4%.The synergistic catalytic effect of CN and silicon hydroxyl is the main reason for the high activity of CN/MSN.

关 键 词：石墨相氮化碳 介孔氧化硅球 CO_(2) 环加成 环状碳酸酯 

分 类 号：TQ426[化学工程]