席夫碱钴卟啉-TiO2复合光催化剂的制备及其光催化性能研究  

Preparation and Photocatalytic Activity of Schiff Base Cobalt Porphyrin-TiO_2 Composites

作　　者：钮金芬[1] 韩广超[2] 戴佩璇 姚秉华[1] 刘存瑞[1] 王钰[1] NIU Jinfen HAN Guangchao DAI Peixuan YAO Binghua LIU Cunrui WANG Yu(Department of Applied Chemistry, Xi＇an University of Technology, Xi＇an 710048, China Department of Organic Chemistry, Liaoning University, Shenyang 110036, China)

机构地区：[1]西安理工大学应用化学系,西安710048 [2]辽宁大学有机化学系,沈阳110036

出　　处：《材料研究学报》2016年第12期947-954,共8页Chinese Journal of Materials Research

基　　金：陕西省教育厅科研计划项目16JK1546;2015年陕西省大学生创新创业训练计划项目306-251051570;西安理工大学高学历人才博士启动项目108-211309;西安理工大学科技创新项目2016CX014;西安理工大学优秀青年创新团队计划项目108-00T1402资助

摘　　要：采用Alder法合成的5-对硝基苯基-10,15,20-三苯基钴卟啉,通过浓盐酸/Sn Cl2还原得5-对氨基苯基-10,15,20-三苯基钴卟啉,再与对硝基苯甲醛反应生成席夫碱钴卟啉,以席夫碱钴卟啉为敏化剂,并与纯锐钛矿型TiO_2作用,得到相应的金属卟啉敏化TiO_2复合光催化剂XFJ-Co-TPP-TiO_2。利用红外、紫外-可见漫反射光谱、XRD和SEM对所得金属卟啉以及XFJ-CoTPP-TiO_2复合光催化剂进行了表征和分析。分析结果表明,所合成的金属卟啉均为目标化合物,金属卟啉成功负载于TiO_2表面。以亚甲基蓝和罗丹明B为模型反应物,研究XFJ-Co-TPP-TiO_2复合催化剂的可见光光催化性能,与纯TiO_2的光催化效果相比,用席夫碱钴卟啉敏化后的TiO_2对亚甲基蓝和罗丹明B的光催化效果有了明显的提高。可见光条件照射下,各种清除剂对光催化降解反应的影响表明,空穴(h+)是催化剂XFJ-Co-TPP-TiO_2-1光降解罗丹明B反应体系中的主要活性物种。A Schiff base cobalt porphyrin, namely N-（5-p-phenyl） -10, 15, 20-triphenyl porphyrin-nitrophenyl azomethine, denoted as XFJ-Co-TPP, was prepared by chemical synthetic method. Using XFJ-Co-TPP as sensitizer, anatase TiO2 samples were impregnated with metal porphyrin to form XFJ-Co-TPP-TiO2 composite photocatalysts. The photocatalysts were characterized by FT-IR, UV-Vis DRS, XRD and SEM. The results showed that the as-synthesised Schiff base cobalt porphyrins were target compound, which were successfully depositedon the surface of TiO2. The photocatalytic activity of XFJ-Co-TPP-TiO2 composite photocatalysts was investigated throughthe photocatalysts assisted degradation of methylene blue（MB） and Rhodamine B （RhB） under visible light irradiation. It was found that XFJ-Co-TPP-TiO2 composite exhibited much higher photodegradation efficiency than the bare TiO2 catalysts. The effect of various radical scavengers on the degradation of RhB with XFJ-Co-TPP-TiO2-1 as catalyst showed thath＋ was likely to be major active specie responsible for the dye degradation under visible light.

关 键 词：无机非金属材料 席夫碱卟啉 TIO2 敏化 光催化 

分 类 号：O643[理学—物理化学]