title: CoTiO3/Ag3VO4 composite: A study on the role of CoTiO3 and the active species in the photocatalytic degradation of methylene blue.
abstract: The role of CoTiO3 and the possible active species in the methylene blue (MB) degradation over the visible-light-driven CoTiO3/Ag3VO4 catalyst have firstly been investigated in this work. CoTiO3 is found to play important roles in enhancing the visible light-harvesting ability of the composite and increasing electron-hole separation efficiency due to the hybrid effect between Ag3VO4 and CoTiO3. The indirect probe experiments reveal that CoTiO3/Ag3VO4 heterostructure provides large amount of active species, therefore a high photocatalytic activity could be obtained. The results clearly suggest that the photocatalytic MB degradation over this hybrid catalyst is mainly governed by direct hole oxidation.
authors.affiliation: Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
authors.forename: Kanlayawat
authors.initials: K
authors.lastname: Wangkawong
authors.affiliation: Materials Science Research Centre, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
authors.forename: Sukon
authors.initials: S
authors.lastname: Phanichphant
authors.affiliation: Thai Microelectronics Center (TMEC), National Electronics and Computer Technology Center (NECTEC), Chachoengsao 24000, Thailand.
authors.forename: Doldet
authors.initials: D
authors.lastname: Tantraviwat
authors.affiliation: Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand. Electronic address: binceesungvorn@gmail.com.
authors.forename: Burapat
authors.initials: B
authors.lastname: Inceesungvorn
keywords: Active species; Ag(3)VO(4); CoTiO(3); Composite; Heterojunction; Photocatalyst