An Amine-Functionalized Iron(III) Metal-Organic Framework as Efficient Visible-Light Photocatalyst for Cr(VI) Reduction.
An Amine-Functionalized Iron(III) Metal-Organic Framework as Efficient Visible-Light Photocatalyst for Cr(VI) Reduction.
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DOI：
10.1002/advs.201500006
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发表时间：
2015-03
期刊：
影响因子：
15.1
通讯作者：
Ye, Jinhua
中科院分区：
文献类型：
--
作者：
Shi, Li;Wang, Tao;Zhang, Huabin;Chang, Kun;Meng, Xianguang;Liu, Huimin;Ye, Jinhua
研究了MIL-88B结构的铁基金属有机骨架(MOF)光催化还原铬(VI)的反应。结果表明，含有Fe_3-μ_3-氧簇合物的MIL-88B(Fe)MOF在可见光照射下可以作为光催化剂还原铬(VI)，这是由于Fe_3-μ_3-氧簇合物的直接激发作用。胺功能化的MIL-88B(Fe)MOF(简称NH2-MIL-88B(Fe))在可见光照射下表现出比MIL-88B(Fe)更高的光催化还原铬(VI)的效率。结果表明，除了直接激发Fe_3-μ_3-氧簇合物外，NH_2-μ-88B(Fe)中的胺官能团也可以被激发并将一个电子转移到Fe_3-MIL_3-氧簇合物中，这是提高光催化还原铬(VI)活性的原因。另外两种胺基铁(III)MOF(NH2-MIL-53(Fe)和NH2-MIL-101(Fe))的光催化还原Cr(VI)活性也得到了提高。
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)).
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