title: Multifunctional polyoxometalates encapsulated in MIL-100(Fe): highly efficient photocatalysts for selective transformation under visible light.
abstract: H3PMo12O40 molecules have been successfully encapsulated in the cavities of MIL-100(Fe) via a facile hydrothermal method (denoted as HPMo@MIL-100(Fe)). A series of characterization has corroborated the insertion of H3PMo12O40 within the cavities of MIL-100(Fe). The resulting HPMo@MIL-100(Fe) nanocomposites have exhibited much higher photoactivity than the original-MIL-100(Fe) toward the photocatalytic selective oxidation of benzylic alcohols and the reduction of Cr(vi) under visible light irradiation (λ≥ 420 nm). The higher photoactivity of HPMo@MIL-100(Fe) can be attributed to the integrative effect of enhanced light absorption intensity and more efficient separation of photogenerated electron-hole pairs. The host porous structure of MIL-100(Fe) can achieve a uniform composition with H3PMo12O40, which is significantly important for producing highly reactive dispersed H3PMo12O40 molecules and enhancing the photocatalytic activity of HPMo@MIL-100(Fe) nanocomposites. And the immobilized H3PMo12O40 molecules are more convenient for recycling. Importantly, almost no Fe and Mo ions leach from the MIL-100(Fe) during the reaction, which verifies the photostability of the HPMo@MIL-100(Fe). In addition, possible photocatalytic redox reaction mechanisms have been investigated.
authors.affiliation: State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China.
authors.forename: Ruowen
authors.initials: R
authors.lastname: Liang
authors.forename: Rui
authors.initials: R
authors.lastname: Chen
authors.forename: Fenfen
authors.initials: F
authors.lastname: Jing
authors.forename: Na
authors.initials: N
authors.lastname: Qin
authors.forename: Ling
authors.initials: L
authors.lastname: Wu
mesh_terms: D000438:Alcohols / Q000737:chemistry; D002384:Catalysis; D002857:Chromium / Q000737:chemistry; D008027:Light; D053761:Nanocomposites / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D017553:Phosphorus Compounds / Q000737:chemistry*; D017973:Tungsten Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction; D000099294:Polyoxometalates
chemical_list: D000438:Alcohols; D002857:Chromium; D010087:Oxides; D017553:Phosphorus Compounds; D017973:Tungsten Compounds; C450141:(PMo12O40)3-; C102296:polyoxometalate I; D000099294:Polyoxometalates; C074702:chromium hexavalent ion