Versatility of CoPcS in CoPcS/TiO2 for MB degradation: photosensitization, charge separation and oxygen activation. Issue 64 (30th October 2018)

• Record Type: Journal Article
• Authors: Gao, Zhao; Yang, Hanpei; Zhu, Hongyu; Guo, Runqiang; Wu, Junmin
• Is Part Of: RSC advances. Volume 8:Issue 64(2018)
• Page Start: 36596
• Page End: 36603
• Publication Date: 2018-10-30
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra06161k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : In this report, a composite photocatalyst consisting of cobalt phthalocyanine sulfate (CoPcS) and TiO2 was prepared by a facile synthesis. Abstract : In this report, a composite photocatalyst consisting of cobalt phthalocyanine sulfate (CoPcS) and TiO2 was prepared by a facile synthesis. Careful characterizations and measurements indicate a covalent grafting of CoPcS onto TiO2 through Ti–O–S linkages, acquiring an intimate heterojunction between TiO2 and CoPcS. The obtained composite was evaluated for its photocatalytic activity toward the degradation of methyl blue (MB) under visible light irradiation. The evaluation showed a significantly enhanced degradation rate of MB by CoPcS/TiO2 . The improved photocatalytic performance of CoPcS/TiO2 was attributed to the photosensitization of TiO2 by CoPcS, charge separation by electron transfer at the interface of the heterojunction formed between CoPcS and TiO2, and oxygen activation via CoPcS. A synergetic mechanism in improving the photocatalytic performance of TiO2 by CoPcS was investigated.