title: Combination of heterogeneous Fenton-like reaction and photocatalysis using Co-TiO₂nanocatalyst for activation of KHSO₅ with visible light irradiation at ambient conditions.
abstract: A novel coupled system using Co-TiO₂was successfully designed which combined two different heterogeneous advanced oxidation processes, sulfate radical based Fenton-like reaction (SR-Fenton) and visible light photocatalysis (Vis-Photo), for degradation of organic contaminants. The synergistic effect of SR-Fenton and Vis-Photo was observed through comparative tests of 50mg/L Rhodamine B (RhB) degradation and TOC removal. The Rhodamine B degradation rate and TOC removal were 100% and 68.1% using the SR-Fenton/Vis-Photo combined process under ambient conditions, respectively. Moreover, based on XRD, XPS and UV-DRS characterization, it can be deduced that tricobalt tetroxide located on the surface of the catalyst is the SR-Fenton active site, and cobalt ion implanted in the TiO₂lattice is the reason for the visible light photocatalytic activity of Co-TiO₂. Finally, the effects of the calcination temperature and cobalt concentration on the synergistic performance were also investigated and a possible mechanism for the synergistic system was proposed. This coupled system exhibited excellent catalytic stability and reusability, and almost no dissolution of Co²⁺ was found.
authors.affiliation: School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China; Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China. Electronic address: chenqingkong@126.com.
authors.forename: Qingkong
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China. Electronic address: jfy@cqu.edu.cn.
authors.forename: Fangying
authors.initials: F
authors.lastname: Ji
authors.affiliation: T.Y. Lin International Engineering Consulting (China) Co., Ltd, Chongqing 401121, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Guo
authors.affiliation: Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Fan
authors.affiliation: Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Xu
mesh_terms: D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D008956:Models, Chemical; D010545:Peroxides / Q000737:chemistry*; D010782:Photolysis; D012235:Rhodamines; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D010545:Peroxides; D012235:Rhodamines; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C038288:peroxymonosulfate; D003035:Cobalt; D014025:Titanium; C029773:rhodamine B
keywords: Cobalt; Fenton-like; Photocatalysis; Sulfate radical; Visible light