title: An efficient dye-sensitized BiOCl photocatalyst for air and water purification under visible light irradiation.
abstract: A photosensitized BiOCl catalyst was found to be effective for photocatalytic water purification and air remediation under visible light irradiation (λ > 420 nm). Prepared by a solvothermal method, the BiOCl crystals possessed a 3D hierarchical spherical structure with the highly active facets exposed. When sensitized by Rhodamine B (RhB), the photocatalyst system was more active than N-doped TiO2 for breaking down 4-chlorophenol (4-CP, 200 ppm) and nitric monoxide (NO, 500 ppb). The high activity could be attributed to the hierarchical structure (supplying feasible reaction tunnels for adsorption and transition of reactants or products) and the efficient exposure of the {001} facets. The former provides an enriched oxygen atom density that promotes adsorption of cationic dye RhB, and creates an oxygen vacancy state. The HO˙ and ˙O2(-) radicals produced from the injected electrons from the excited dye molecule (RhB*) into the conduction band of BiOCl were responsible for the excellent photocatalytic performance of the RhB-BiOCl system.
authors.affiliation: Department of Chemistry, Key Laboratory of Resource Chemistry of Ministry of Education and Shanghai Key Laboratory of Rare Earth Functional Materials, Shanghai Normal University, Shanghai 200234, China. Liguisheng@shnu.edu.cn Hexing-Li@shnu.edu.cn.
authors.forename: Guisheng
authors.initials: G
authors.lastname: Li
authors.forename: Bo
authors.initials: B
authors.lastname: Jiang
authors.forename: Shuning
authors.initials: S
authors.lastname: Xiao
authors.forename: Zichao
authors.initials: Z
authors.lastname: Lian
authors.forename: Dieqing
authors.initials: D
authors.lastname: Zhang
authors.forename: Jimmy C
authors.initials: JC
authors.lastname: Yu
authors.forename: Hexing
authors.initials: H
authors.lastname: Li
mesh_terms: D000327:Adsorption; D000388:Air / Q000032:analysis; D000393:Air Pollutants / Q000737:chemistry / Q000302:isolation & purification; D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry / Q000302:isolation & purification*; D004396:Coloring Agents / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D008027:Light; D009569:Nitric Oxide / Q000737:chemistry / Q000302:isolation & purification*; D010782:Photolysis; D012235:Rhodamines / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000393:Air Pollutants; D002733:Chlorophenols; D004396:Coloring Agents; D012235:Rhodamines; D009569:Nitric Oxide; C029107:4-chlorophenol; C044685:bismuth oxychloride; C029773:rhodamine B; D001729:Bismuth