title: Adsorption behavior and mechanism of ibuprofen onto BiOCl microspheres with exposed {001} facets.
abstract: BiOCl microspheres with exposed {001} facets have been synthesized through a simple solvothermal method. The adsorption and photocatalytic activities of BiOCl microspheres were evaluated by removal of ibuprofen (IBP) as the model reaction. Parameters including IBP concentration, BiOCl dosage, and inorganic ions were investigated to reveal the role of adsorption in BiOCl-based photocatalysis. We found that the high IBP removal rate by BiOCl is not due to photocatalytic oxidation but to surface adsorption. The combination of ICP/MS, IC, XPS, and FT-IR results directly proved that anion exchange between dissociated IBP and Cl accompanied by the formation of surface complex (O-Bi-OOC-C12H17) onto the BiOCl surface is the main adsorption mechanism. In addition, we also demonstrated that organic compounds with carboxyl group (-COOH) such as diclofenac, benzoic acid, and p-phthalic acid can be adsorbed by BiOCl while organic compounds without carboxyl group such as carbamazepine, nitrobenzene, and p-chloronitrobenzene cannot be adsorbed. We believe that the BiOCl adsorption behavior and mechanism should be considered when discussing its photocatalytic mechanism.
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China.|Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering (DBCEE), University of Cincinnati, Cincinnati, OH, 45221-0012, USA.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China.
authors.forename: Shiye
authors.initials: S
authors.lastname: Sun
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China.
authors.forename: Rong
authors.initials: R
authors.lastname: Chen
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China.
authors.forename: Tuqiao
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering (DBCEE), University of Cincinnati, Cincinnati, OH, 45221-0012, USA.
authors.forename: Bangxing
authors.initials: B
authors.lastname: Ren
authors.affiliation: Environmental Engineering and Science Program, Department of Biomedical, Chemical and Environmental Engineering (DBCEE), University of Cincinnati, Cincinnati, OH, 45221-0012, USA.
authors.forename: Dionysios D
authors.initials: DD
authors.lastname: Dionysiou
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China.
authors.forename: Zhejian
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Liu
authors.affiliation: Zhejiang Key Laboratory of Drinking Water Safety and Distribution Technology, Zhejiang University, Hangzhou, 310058, People's Republic of China. yemiao008@zju.edu.cn.
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Ye
mesh_terms: D000327:Adsorption; D002384:Catalysis; D007052:Ibuprofen; D008863:Microspheres; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D007052:Ibuprofen
keywords: Adsorption mechanism; Anion exchange; BiOCl microspheres; Ibuprofen; Photocatalysis