Ligand modification of UiO-66 with an unusual visible light photocatalytic behavior for RhB degradation†,Dalton Transactions

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Ligand modification of UiO-66 with an unusual visible light photocatalytic behavior for RhB degradation†
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-12-29 00:00:00 , DOI: 10.1039/c7dt04477a
Xixi Mu _{1,

2,

3,

4,

5} , Jifei Jiang _{1,

2,

3,

4,

5} , Fufang Chao _{1,

2,

3,

4,

5} , Yongbing Lou _{1,

2,

3,

4,

5} , Jinxi Chen _{1,

2,

3,

4,

5}

Affiliation

A series of isostructural UiO-66-X (X = H, NH₂, Br, (OH)₂, (SH)₂) catalysts have been successfully synthesized by modifying different functional groups on the ligand. The effects of the ligand modification of UiO-66 were investigated for their photocatalytic activity of Rhodamine B degradation under visible light. Surprisingly, UiO-66-NH₂ and UiO-66-(OH)₂ which have narrow bandgaps and excellent visible light absorption do not show outstanding photocatalytic performances compared to UiO-66 and UiO-66-Br. Electrochemical test results indicated that the conduction band potential of UiO-66-X and the separation efficiency of electrons were quite important in these photocatalytic reactions, other than the electronic effect as reported. Similar photocatalytic degradation behaviors were found for Congo red and methyl orange. Herein, we firstly reported different mechanisms of selective degradation in the case of UiO-66, which subverted the previous understanding of photodegradation behavior.

中文翻译：

UiO-66的配体修饰具有不寻常的可见光对RhB降解的光催化行为†

通过修饰配体上的不同官能团，已经成功合成了一系列同构的UiO-66-X（X = H，NH ₂，Br，（OH）₂，（SH）₂）催化剂。研究了UiO-66的配体修饰对可见光中若丹明B降解的光催化活性。令人惊讶的是，UiO-66-NH ₂和UiO-66-（OH）₂与UiO-66和UiO-66-Br相比，具有窄的带隙和出色的可见光吸收性能的光催化性能不佳。电化学测试结果表明，UiO-66-X的导带电势和电子的分离效率在这些光催化反应中非常重要，除了所报道的电子效应。对于刚果红和甲基橙，发现了相似的光催化降解行为。在本文中，我们首先报道了在UiO-66情况下选择性降解的不同机制，这颠覆了先前对光降解行为的理解。

更新日期：2017-12-29

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