Gao Zhao, Yang Hanpei, Zhu Hongyu, Guo Runqiang, Wu Junmin
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University Nanjing 210098 China
RSC Adv. 2018 Oct 30;8(64):36596-36603. doi: 10.1039/c8ra06161k. eCollection 2018 Oct 26.
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. The evaluation showed a significantly enhanced degradation rate of MB by CoPcS/TiO. The improved photocatalytic performance of CoPcS/TiO was attributed to the photosensitization of TiO by CoPcS, charge separation by electron transfer at the interface of the heterojunction formed between CoPcS and TiO, and oxygen activation CoPcS. A synergetic mechanism in improving the photocatalytic performance of TiO by CoPcS was investigated.
在本报告中，通过简便的合成方法制备了一种由硫酸钴酞菁（CoPcS）和TiO组成的复合光催化剂。仔细的表征和测量表明，CoPcS通过Ti-O-S键共价接枝到TiO上，在TiO和CoPcS之间形成了紧密的异质结。对所得复合材料在可见光照射下对甲基蓝（MB）降解的光催化活性进行了评估。评估结果表明，CoPcS/TiO对MB的降解速率显著提高。CoPcS/TiO光催化性能的提高归因于CoPcS对TiO的光敏化、CoPcS与TiO之间形成的异质结界面处通过电子转移的电荷分离以及CoPcS对氧的活化。研究了CoPcS提高TiO光催化性能的协同机制。
