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Synthesis of CuAPTPP-TDI-TiO2 Conjugated Microspheres and its Photocatalytic Activity (cited: 1)
Chao Peng1, Bing-hua Yao*1, Wen Zhang2, Jin-fen Niu1, Jie Zhao1
1.Department of Applied Chemistry, Xi'an University of Technology, Xi'an 710054, China;2.Department of Civil Engineering, University of Arkansas, Fayetteville 72701, USA
Abstract:
The metal complex 5-(4-aminophenyl)-10,15,20-triphenylporphyrin copper (CuAPTPP) was covalently linked on the surface of TiO2 microspheres by using toluene disocyanate (TDI) as a bridging bond unit. The hydroxyl group (-OH) of TiO2 microspheres surface and the amino group (-NH2) of CuAPTPP reacted respectively with the active -NCO groups of TDI to form a surface conjugated microsphere CuAPTPP-TDI-TiO2 that was confirmed by FT-IR spectra. The CuAPTPP-TDI-TiO2 microspheres were characterized with UV-visible, elemental analysis, XRD, SEM, and UV-Vis diffuse reflectance spectra. The effect of amounts of linked TDI on the performance of photocatalytic microspheres was discussed, and the optimal molar ratio of TDI:TiO2 was established. The photocatalytic activity of CuAPTPP-TDI-TiO2 was evaluated using the photocatalytic degradation of methylene blue (MB) under visible-light irradiation. The results showed that, TDI, as a bond unit, was used to form a steady chemical brigdging bond linking CuAPTPP and the surface of TiO2 microspheres, and the prepared catalyst exhibited higher photocatalytic activity under visible-light irradiation for MB degradation. The degradation rate of 20 mg/L MB could reach 98.7% under Xe-lamp (150 W) irradiation in 120 min. The degradation of MB followed the first-order reaction model under visible light irradiation, and the rate constant of 5.1×10-2 min-1 and the half-life of 11.3 min were achieved. And the new photocatalyst can be recycled for 4 times, remaining 90.0% MB degradation rate.
Key words:  Conjugated microspheres, Surface modification, Sensitization, Visible-light photocatalysis, Methylene blue
FundProject:
CuAPTPP-TDI-TiO2光催化微球的合成及其光催化性能 (cited: 1)
彭超1, 姚秉华*1, 张文2, 钮金芬1, 赵洁1
1.西安理工大学应用化学系,西安710048;2.美国阿肯色大学土木工程系,费耶特维尔AR 72701
摘要:
采用Adler法合成了5-(4-氨基苯基)-10,15,20-三苯基卟啉铜配合物(CuAPTPP),通过甲苯二异氰酸酯(TDI)的桥联作用对TiO2微球进行表面修饰,使TDI分子中的两个活性TDI基团分别与TiO2表面的羟基和CuAPTPP的氨基反应,将CuAPTPP敏化剂分子以化学键合的方式固定在TiO2表面,形成光催化微球CuAPTPP-TDI-TiO2.通过FT-IR、XRD、SEM、EA、UV-Vis和DRS等测试手段对CuAPTPP-TDI-TiO2进行结构表征.讨论了桥联分子TDI修饰量对光催化微球性能的影响,确定了TDI与TiO2的最佳摩尔比.以亚甲基蓝(MB)为降解对象,考察了CuAPTPP-TDI-TiO2微球的可见光催化性能.结果表明,桥联分子TDI在CuAPTPP与TiO2微球表面形成了牢固的化学键,复合微球在150 W氙灯辐照下降解10 mg/LMB溶液,120 min降解率可达98.7%,其降解率过程服从一级动力学规律,测得降解速率常数为5.1×10-2 min-1,半衰期为11.3 min.催化微球在回收4次的条件下,对MB的降解率仍保持在90%以上.
关键词:  共轭微球,表面修饰,敏化,可见光催化,亚甲基蓝
DOI:10.1063/1674-0068/27/02/200-208
分类号: