TiO2 encapsulated in Salicylaldehyde-NH2-MIL-101(Cr) for enhanced visible light-driven photodegradation of MB
TiO2 encapsulated in Salicylaldehyde-NH2-MIL-101(Cr) for enhanced visible light-driven photodegradation of MB
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DOI：
10.1016/j.apcatb.2016.03.034
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发表时间：
2016-08-15
影响因子：
22.1
通讯作者：
Xiao, Jing
中科院分区：
文献类型：
--
作者：
Li, Xiyi;Pi, Yunhong;Xiao, Jing
首次合成了一种有效的可见光驱动的改性MOF包覆TiO 2光催化剂，并对所得的TiO2@水杨酰亚胺-NH 2-MIL-101（Cr）（即LP（Ti））进行了表征。研究了LP（Ti）对MB的光降解作用。水杨醛的引入显著增强了LP和LP（Ti）的光吸收性能，与NH 2-MIL-101（Cr）和TiO2@NH2-MIL-101相比发生了红移。LP（Ti）在可见光照射60 min时仅用5 mg光催化剂就显示出高达86%的优异的MB光降解效率，这是测试样品NH 2-MIL-101（Cr）、TiO2@NH2-MIL-101（Cr）、LP、LP（Ti）和Degussa P-25中最高的。LP（Ti）/可见光/H_2O_2体系的协同指数提高了106%。进一步阐明了LP（Ti）可见光下H_2O_2光降解MB的机理。本研究为设计MOF包覆TiO 2可见光降解有机污染物的环境修复提供了一种新的途径。(C)2016爱思唯尔B. V.保留所有权利。
An effective visible light-driven photocatalyst of TiO2 encapsulated in modified MOF was synthesized for the first time and the resulting TiO2@Salicylaldehyde-NH2-MIL-101(Cr) (namely LP(Ti)) was characterized. Then the photodegradation of MB with LP(Ti) was tested. The introduction of salicylaldehyde significantly enhanced the light-absorption properties of LP and LP(Ti), undergoing redshift compared with NH2-MIL-101(Cr) and TiO2@NH2-MIL-101. The LP(Ti) showed an excellent photodegradation efficiency of MB as high as 86% in 60 min of visible-light irradiation with only 5 mg photocatalyst, which was the highest among the tested samples NH2-MIL-101(Cr), TiO2@NH2-MIL-101(Cr), LP, LP(Ti) and Degussa P-25. The LP(Ti)/visible/H2O2 system showed the enhanced synergy index by 106%. The mechanism of the photodegradation of MB with H2O2 over LP(Ti) under the visible light was further illustrated. This work provides a new approach to design MOF encapsulated TiO2 for visible light-induced photodegradation of organic contaminants for the environmental remediation. (C) 2016 Elsevier B.V. All rights reserved.