Synthesis and characterization of Cu-phthalocyanine hybrid TiO2 sol

Abstract

TiO2 sol was prepared by a sol-gel method. Sodium polymethacrylate (PMAA) was added to TiO2 sol, resulting in a stable TiO2-PMAA . The copper(II) phthalocyanine tetrasulfonate ( CuPcTs ) was used to sensitize nanocrystalline TiO2 photocatalyst. The hybrid nanoparticles had an average particle size of 35 nm and core-shell type morphology was observed using a TEM. For the preparation of TiO2-CuPcTs , TiO2 was directly complexed with CuPcTs , leading to a particle size of 100 nm by a sonication treatment. The photodegradation of the hybrid type photosensitizer was measured using AO7 as an indicator with He-Ne laser with wavelength 633 nm. The efficiency of singlet oxygen generation was also measured by the reduction ratio of concentration of trans-1-(2′-methoxyvinyl) pyrene (MVP) responding to the change of fluorescene emission at 420 nm, depending on the irradiation time.