氧化石墨烯负载四(4-羟基苯基)铁卟啉催化氧化乙苯

Oxidation of ethylbenzene by graphene oxide-immobilized over iron tetrakis(4-hydroxyphenyl)porphyrin

为了探究氧化石墨烯负载四(4-羟基苯基)铁卟啉的催化性能,通过π-π非共价键和氢键作用将四(4-羟基苯基)铁卟啉(Fe THPP)负载到氧化石墨烯(GO)上。用UV-Vis、FT-IR、XPS、BET、TG、SEM等技术对该催化材料进行表征。在160℃和0.8 MPa较佳反应条件下,用负载有0.50 mg Fe THPP的Fe THPP/GO催化氧气氧化乙苯。催化结果表明:本负载催化材料在催化中可以连续使用5次,平均乙苯转化率和醇酮产率分别为28.4%和19.9%,催化活性和重复使用性均优于未负载的Fe THPP。这说明氧化石墨烯能促进Fe THPP催化性能,保护Fe THPP免遭结构破坏并较好地保持其催化活性。

To research the catalytic performance of graphene oxide(GO)-immobilized iron tetrakis(4-hydroxyphenyl)porphyrin(Fe THPP),Fe THPP/GO,the iron porphyrin was immobilized onto GO viaπ-πnon-covalent interacting and double-hydrogen bonding between Fe THPP and GO.UV-Vis,FT-IR,XPS,BET,TG,SEM and other techniques were used for characterizing the catalyst material.Fe THPP/GO with 0.50 mg of Fe THPP,was used for the catalytic oxidation of ethylbenzene under the optimal reaction conditions of 160℃and 0.8MPa.The experimental results showed that,Fe THPP/GO could be continuously used 5 times during the oxidation of ethylbenzene,with average ethylbenzene conversion of 28.4%and yields(ketone+alcohol)of 19.9%.The catalytic activity and reusability were better than those of unsupported Fe THPP.This evidenced that GO could promote catalytic performance of Fe THPP,and protect Fe THPP from structural destruction,and then make it reusable in the oxidation reaction.Furthermore,it can effectively keep the originally catalytic performance of Fe THPP.