Novel axial substituted subphthalocyanine and its TiO_2 photocatalyst for degradation of organic water pollutant under visible light

摘要

In this study, highly reactive TiO2 modified by a novel axial substituted subphthalocyanine H(12)SubPcB-OPH-COOH (SubPc) was successfully prepared. TiO2/SubPc nanoparticles had been fabricated via a Solvothermal method. The approaches of DFT and TD-DFT were utilized to research the electronic structure and optical spectra in the subphthalocyanines. The photocatalytic abilities of the present nanocomposites were investigated by degrading the methyl orange (MO) and bromophenol blue (BB) in irradiance of visible light. The removal efficiency of MO and BB over TiO2/SubPc (25:1) was 5.28 and 1.41 times higher than pure TiO2, respectively. Furthermore, the reusability studies showed that the photocatalytic activity of TiO2/SubPc could be maintained over 85% after 5 recycles.