CuAPTPP-TDI-TiO2光催化微球的合成及其光催化性能 (cited: 1)

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．

Synthesis of CuAPTPP-TDI-TiO2 Conjugated Microspheres and its Photocatalytic Activity (cited: 1)

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.