聚离子液体载MoO2/Ag催化分子氧氧化苯乙烯的研究  

Study on oxidation of styrene with molecular oxygen catalyzed by MoO2/Ag on polyionic liquid

作　　者：吴岳峰 曲永芳 李大欢 苏苗军 刘勇[1] WU Yuefeng;QU Yongfang;LI Dahuan;SU Miaojun;LIU Yong(College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,Henan,China)

机构地区：[1]河南大学化学化工学院,河南开封475004

出　　处：《化工学报》2020年第11期4990-4998,共9页CIESC Journal

基　　金：国家自然科学基金项目(21676072);河南省青年骨干教师项目(2017GGJS018)。

摘　　要：以氨基功能化的聚离子液体为载体,通过离子交换和水热还原,制备出负载型催化剂PVAD/MoO2/Ag,考察了其催化苯乙烯氧化的性能。采用FT-IR、TG、XRD、SEM和BET对其所制备的催化剂进行表征。苯乙烯氧化性能研究结果表明,PVAD/MoO2/Ag4%表现出最佳的催化活性,在乙腈为溶剂,温度为90℃,氧气压力为0.8 MPa的条件下,反应8h,苯乙烯的转化率为49.9%,苯甲醛的选择性达到74.4%。并且催化剂重复使用5次,活性没有明显下降,表现出良好的重复利用性。The supported catalyst PVAD/MoO2/Ag was prepared by ion exchange and hydrothermal reduction using amino-functionalized polyionic liquid as the carrier,and its performance in catalyzing the oxidation of styrene was investigated.The prepared catalysts were characterized by FT-IR,TG,XRD,SEM and BET.The results showed that PVAD/MoO2/Ag4%showed the best catalytic activity.Under the conditions of acetonitrile as solvent,temperature of 90℃and oxygen pressure of 0.8 MPa for 8 h,the conversion rate of styrene was 49.9%,and the selectivity of benzaldehyde reached 74.4%.Moreover,the activity did not decrease significantly after reused 5 times,showing good reusability.

关 键 词：聚离子液体 分子氧 氧化 苯乙烯 苯甲醛 

分 类 号：TQ028.8[化学工程]