title: New photocatalysts based on MIL-53 metal-organic frameworks for the decolorization of methylene blue dye.
abstract: The photocatalytic decolorization of methylene blue dye in aqueous solution using a novel photocatalyst MIL-53(Fe) metal-organic frameworks was investigated under UV-vis light and visible light irradiation. The effect of electron acceptor H(2)O(2), KBrO(3) and (NH(4))(2)S(2)O(8) addition on the photocatalytic performance of MIL-53(Fe) was also evaluated. The results show that MIL-53(Fe) photocatalyst exhibited photocatalytic activity for MB decolorization both under UV-vis light and visible light irradiation, and the MB decolorization over MIL-53(Fe) photocatalyst followed the first-order kinetics. The addition of different electron acceptors all enhances the photocatalytic performance of MIL-53(Fe) photocatalyst, and the enhanced rate follows the order of H(2)O(2)>(NH(4))(2)S(2)O(8)>KBrO(3) under UV-vis light irradiation, while in the order of (NH(4))(2)S(2)O(8)>H(2)O(2)>KBrO(3) under visible light irradiation. Moreover, MIL-53(Fe) did not exhibit any obvious loss of the activity for MB decolorization during five repeated usages. The photocatalytic activities over MIL-53(M) (M=Al, Fe), the isostructure to MIL-53(Fe), indicate that the metal centers show nil effect on the photocatalytic activity of MIL-53(M) photocatalysts.
authors.affiliation: Laboratory of Advanced Porous Materials and School of Chemistry and Chemical Engineering, Anhui University, Hefei 230039, China.
authors.forename: Jing-Jing
authors.initials: JJ
authors.lastname: Du
authors.forename: Yu-Peng
authors.initials: YP
authors.lastname: Yuan
authors.forename: Jia-Xin
authors.initials: JX
authors.lastname: Sun
authors.forename: Fu-Min
authors.initials: FM
authors.lastname: Peng
authors.forename: Xia
authors.initials: X
authors.lastname: Jiang
authors.forename: Ling-Guang
authors.initials: LG
authors.lastname: Qiu
authors.forename: An-Jian
authors.initials: AJ
authors.lastname: Xie
authors.forename: Yu-Hua
authors.initials: YH
authors.lastname: Shen
authors.forename: Jun-Fa
authors.initials: JF
authors.lastname: Zhu
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008027:Light; D008751:Methylene Blue / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction; D010782:Photolysis; D012996:Solutions; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects
chemical_list: D004396:Coloring Agents; D006843:Hydrocarbons, Chlorinated; D012996:Solutions; D014874:Water Pollutants, Chemical; D000535:Aluminum; D007501:Iron; D008751:Methylene Blue