氧化锌固载四(4-羧基苯基)钴卟啉的催化性能  

Catalytic performance of ZnO supported cobalt tetra(4-carboxylphenyl)porphyrin

作　　者：曹轩[1] 黄冠[1] 沈莉[1] 胡耀东[1] 郭勇安[1] 蒋月秀[1] 危素娟[1] 

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,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2012年第3期465-469,共5页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51063001);广西自然科学基金重点项目(2010GXNSFD013014);广西石化资源加工及过程强化技术重点实验室主任课题基金(11-C-02-01);广西大学实验改革项目基金资助项目

摘　　要：为研究[Co TCPP/ZnO]在无任何溶剂和还原剂的条件下催化氧化甲苯的性能,采用沉淀—烘焙法制备了氧化锌固载四(4-羧基苯基)钴卟啉[Co TCPP/ZnO]催化剂,并用UV-Vis、FT-IR和XRD技术对其进行了表征。结果表明:在较适宜反应温度180℃和压力0.6 MPa条件下,用仅含1.89×10-6mol Co TCPP的氧化锌四(4-羧基苯基)钴卟啉就可连续催化11次,催化效能平均值为:甲苯转化率6.84%,选择性50.47%,转化数6.52×104,比未固载的Co TCPP具有更好的催化性能和重复使用性能。这表明载体氧化锌对四(4-羧基苯基)钴卟啉[Co TCPP]具有良好的促进其催化能力和保护金属卟啉免遭氧化破坏的作用。In order to study the catalysis of tetra （4-carboxylpbenyl） porphyrin supported on ZnO for aerobic oxidation of toluene under mild conditions and in the absence of any solvent and reductant, ZnO supported tetra （4-carboxylphenyl） porphyrin （Co TCPP/ZnO） was prepared by the method of precipitation and calcinations, and characterized by UV-Vis, FT-IR and XRD spectroscopic tech- niques. The results show that a quantity of catalyst containing only 1.89× 10^-6 mol of Co TCPP could be efficiently reused 11 times for the oxidation of toluene, with 6.84% toluene conversion rate, 50.47% selectivity for aldehyde and alcohol, and a catalyst turnover number of 6.52× 10^4, on average, under the optimal reaction conditions of 180 ℃ and 0.6 MPa. It was found that ZnO supported catalyst was more effective and reusable for the oxidation of toluene than the unsupported catalyst. The research results confirm that ZnO has a good promotion for the catalysis of Co TCPP for the oxidation of toluene and protect Co TCPP from oxidation destruction by O2.

关 键 词：氧化锌 四(4-羧基苯基)钴卟啉 氧化 甲苯 

分 类 号：O643.3[理学—物理化学]