四苯基卟啉锌/TiO_2纳米复合材料的原位合成及可见光光催化  

Meso-Tetraphenylporphyrinatozinc/TiO_2 Nanocompound Synthesized by In-situ Method and Photocatalysis under Visible-Light Irradiation

作　　者：李景泉[1] 潘海波[1] 黄金陵[1] 陈耐生[1] 

机构地区：[1]福州大学化学化工学院,福建福州350002

出　　处：《光谱学与光谱分析》2006年第11期2061-2064,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(50472001);福建省教育厅(JB03008)项目资助

摘　　要：利用溶胶-凝胶法,经400℃(4 h)烧结后,原位合成不同摩尔比的5,10,15,20-四苯基卟啉锌(ZnTPP)/TiO2纳米复合材料,通过XRD,FTIR,UV-Vis,荧光光谱等表征分析,确认复合材料中TiO2为锐钛矿相,且ZnTPP在该过程中原位生成。经150 min可见光辐照,摩尔比为1∶100的ZnTPP/TiO2复合材料能使罗丹明B溶液降解率达到92%。其光催化敏化的机理为,通过ZnTPP与TiO2之间的Zn—O键,使光生载流子形成有效的分离,提高了光催化性能。The meso-tetraphenylporphyrinatozinc/titanium dioxide （ZnTPP/TiO2） nanocompounds with different molar ratios were synthesized by sol-gel method at 400℃, 4h. The nanocompounds were characterized by XRD, UV-Vis, FTIR and Fluorescence methods. Anatase for TiO2 in the nanocompounds was defined, and ZnTPP was also obtained during in-situ process. Photocatalystic activities of them influenced by the proportion between ZnTPP and TiO2 were discussed under visible light. The results show that a nanocompound （ZnTPP ： TiO2 = 1 ： 100 mol%） has the best photocatalystic activity, and the degradation of Rhodanmine B is up to 92% after 150 minutes under visible light irradiation. The sensitization mechanism is that the photogener ated charge carriers are separated by Zn-O bond between ZnTPP and TiO2.

关 键 词：ZnTPP/TiO2 原位合成法 纳米复合材料 可见光光催化 

分 类 号：O643[理学—物理化学]