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

Advanced Science

Li Shi²  Tao Wang¹  Huabin Zhang¹  Kun Chang¹  Xianguang Meng²  Huimin Liu¹ 

[1] International Center for Materials Nanoarchitectonics (MANA), and Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan;Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Japan

关键词: Cr(VI) reduction;    electron transfer;    metal–organic frameworks;    photocatalysts;   

DOI  :  10.1002/advs.201500006

来源: Wiley

【 摘 要 】

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)).

【 授权许可】

CC BY   
© 2015 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.