title: MIL-53(Fe) as a highly efficient bifunctional photocatalyst for the simultaneous reduction of Cr(VI) and oxidation of dyes.
abstract: A bifunctional photocatalyst-Fe-benzenedicarboxylate (MIL-53(Fe)) has been synthesized successfully via a facile solvothermal method. The resulting MIL-53(Fe) photocatalyst exhibited an excellent visible light (λ≥ 420nm) photocatalytic activity for the reduction of Cr(VI), the reduction rate have reached about 100% after 40min of visible light irradiation, which has been more efficient than that of N-doped TiO2 (85%) under identical experimental conditions. Further experimental results have revealed that the photocatalytic activity of MIL-53(Fe) for the reduction of Cr(VI) can be drastically affected by the pH value of the reaction solution, the hole scavenger and atmosphere. Moreover, MIL-53(Fe) has exhibited considerable photocatalytic activity in the mixed systems (Cr(VI)/dyes). After 6h of visible light illumination, the reduction ratio of Cr(VI) and the degradation ratio of dyes have been exceed 60% and 80%, respectively. More significantly, the synergistic effect can also be found during the process of photocatalytic treatment of Cr(VI) contained wastewater under the same photocatalytic reaction conditions, which makes it a potential candidate for environmental restoration. Finally, a possible reaction mechanism has also been investigated in detail.
authors: State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou 350002, PR China.
authors: Ruowen
authors: R
authors: Liang
authors: State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou 350002, PR China.
authors: Fenfen
authors: F
authors: Jing
authors: State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou 350002, PR China.
authors: Lijuan
authors: L
authors: Shen
authors: State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou 350002, PR China.
authors: Na
authors: N
authors: Qin
authors: State key laboratory of photocatalysis on energy and environment, Fuzhou University, Fuzhou 350002, PR China. Electronic address: wuling@fzu.edu.cn.
authors: Ling
authors: L
authors: Wu
mesh_terms: D001555:Benzene Derivatives / Q000737:chemistry; D002264:Carboxylic Acids / Q000737:chemistry; D002384:Catalysis; D002857:Chromium / Q000737:chemistry / Q000528:radiation effects; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D007501:Iron / Q000737:chemistry; D008027:Light; D009942:Organometallic Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010782:Photolysis; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects
chemical_list: D001555:Benzene Derivatives; D002264:Carboxylic Acids; D004396:Coloring Agents; D009942:Organometallic Compounds; D014874:Water Pollutants, Chemical; D002857:Chromium; C074702:chromium hexavalent ion; D007501:Iron
keywords: Cr(VI); Dyes; MOFs; Photocatalysis; Visible light