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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-?3-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-?3-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-?3-oxo clusters, the amine functionality in NH2-MIL-88B (Fe) can also be excited and then transferred an electron to Fe3-?3-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)).

SUBMITTER: Shi L 

PROVIDER: S-EPMC5115284 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature

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An Amine-Functionalized Iron(III) Metal-Organic Framework as Efficient Visible-Light Photocatalyst for Cr(VI) Reduction.

Shi Li L   Wang Tao T   Zhang Huabin H   Chang Kun K   Meng Xianguang X   Liu Huimin H   Ye Jinhua J  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20150209 3

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 Fe<sub>3</sub>-μ<sub>3</sub>-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 Fe<sub>3</sub>-μ<sub>3</sub>-oxo clusters. The amine-functionalized MIL-88B (Fe) MOFs (denoted as NH<sub>2</sub>-MIL-88B (Fe)) shows much higher eff  ...[more]

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