title: An Amine-Functionalized Iron(III) Metal-Organic Framework as Efficient Visible-Light Photocatalyst for Cr(VI) Reduction.
abstract: The photocatalytic reduction of Cr(VI) is investigated over iron(III)-based metal-organic frameworks (MOFs) structured as MIL-88B. It is found that MIL-88B (Fe) MOFs, containing Fe3-μ3-oxo clusters, can be used as photocatalyst for the reduction of Cr(VI) under visible light irradiation, which is due to the direct excitation of Fe3-μ3-oxo clusters. The amine-functionalized MIL-88B (Fe) MOFs (denoted as NH2-MIL-88B (Fe)) shows much higher efficiency for the photocatalytic Cr(VI) reduction under visible-light irradiation compared with MIL-88B (Fe). It is revealed that in addition to the direct excitation of Fe3-μ3-oxo clusters, the amine functionality in NH2-MIL-88B (Fe) can also be excited and then transferred an electron to Fe3-μ3-oxo clusters, which is responsible for the enhanced photocatalytic activity for Cr(VI) reduction. The enhanced photocatalytic activity for Cr(VI) reduction is also achieved for other two amine-functionalized iron(III)-based MOFs (NH2-MIL-53 (Fe) and NH2-MIL-101 (Fe)).
authors.affiliation: Graduate School of Chemical Sciences and Engineering Hokkaido University Sapporo Japan; International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS)1-1 Namiki Tsukuba Ibaraki Japan.
authors.forename: Li
authors.initials: L
authors.lastname: Shi
authors.affiliation: International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki Japan.
authors.forename: Tao
authors.initials: T
authors.lastname: Wang
authors.affiliation: International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki Japan.
authors.forename: Huabin
authors.initials: H
authors.lastname: Zhang
authors.affiliation: International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki Japan.
authors.forename: Kun
authors.initials: K
authors.lastname: Chang
authors.affiliation: Graduate School of Chemical Sciences and Engineering Hokkaido University Sapporo Japan; International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS)1-1 Namiki Tsukuba Ibaraki Japan.
authors.forename: Xianguang
authors.initials: X
authors.lastname: Meng
authors.affiliation: International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba Ibaraki Japan.
authors.forename: Huimin
authors.initials: H
authors.lastname: Liu
authors.affiliation: Graduate School of Chemical Sciences and Engineering Hokkaido University Sapporo Japan; International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit National Institute for Materials Science (NIMS)1-1 Namiki Tsukuba Ibaraki Japan; TU-NIMS Joint Research Center School of Materials Science and Engineering Tianjin University 92 Weijin Road Nankai District Tianjin 300072 P.R. China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 P.R. China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Ye
keywords: Cr(VI) reduction; electron transfer; metal–organic frameworks; photocatalysts