Versatility of CoPcS in CoPcS/TiO for MB degradation: photosensitization, charge separation and oxygen activation.

In this report, a composite photocatalyst consisting of cobalt phthalocyanine sulfate (CoPcS) and TiO was prepared by a facile synthesis. Careful characterizations and measurements indicate a covalent grafting of CoPcS onto TiO through Ti-O-S linkages, acquiring an intimate heterojunction between TiO and CoPcS. The obtained composite was evaluated for its photocatalytic activity toward the degradation of methyl blue (MB) under visible light irradiation.