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Highly Efficient Photocatalytic Degradation of Dyes by a Copper–Triazolate Metal–Organic Framework
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-10-18 , DOI: 10.1002/chem.201803306
Chen-Xia Liu 1 , Wen-Hua Zhang 1 , Nan Wang 1 , Penghu Guo 2 , Martin Muhler 2, 3 , Yuemin Wang 4 , Shiru Lin 5 , Zhongfang Chen 5 , Guang Yang 1
Affiliation  

A copper(I) 3,5‐diphenyltriazolate metal–organic framework (CuTz‐1) was synthesized and extensively characterized by using a multi‐technique approach. The combined results provided solid evidence that CuTz‐1 features an unprecedented Cu5tz6 cluster as the secondary building unit (SBU) with channels approximately 8.3 Å in diameter. This metal–organic framework (MOF) material, which is both thermally and chemically (basic and acidic) stable, exhibited semiconductivity and high photocatalytic activity towards the degradation of dyes in the presence of H2O2. Its catalytic performance was superior to that of reported MOFs and comparable to some composites, which has been attributed to its high efficiency in generating .OH, the most active species for the degradation of dyes. It is suggested that the photogenerated holes are trapped by CuI, which yields CuII, the latter of which behaves as a catalyst for a Fenton‐like reaction to produce an excess amount of .OH in addition to that formed through the scavenging of photogenerated electrons by H2O2. Furthermore, it was shown that a dye mixture (methyl orange, methyl blue, methylene blue, and rhodamine B) could be totally decolorized by using CuTz‐1 as a photocatalyst in the presence of H2O2 under the irradiation of a Xe lamp or natural sunlight.

中文翻译:

三唑醇铜金属有机骨架对染料的高效光催化降解

合成了一种3,5-二苯基三氮杂铜(I)金属-有机骨架(CuTz-1),并使用多种技术对其进行了广泛表征。综合结果提供了有力的证据,表明CuTz-1具有前所未有的Cu 5 tz 6团簇作为辅助建筑单元(SBU),其通道直径约为8.3Å 。这种金属-有机骨架(MOF)材料具有热稳定性和化学稳定性(碱性和酸性),在H 2 O 2存在下表现出半导电性和对染料降解的高光催化活性。它的催化性能优于已报道的MOF,并且可与某些复合材料相媲美,这归因于其高效的生成OH,最活跃的染料降解物种。建议光生空穴被Cu I捕获,生成Cu II,后者充当Fenton样反应的催化剂,产生过量的OH除了通过H 2 O 2清除光生电子而形成。此外,还表明在Xe灯的照射下,在H 2 O 2存在下,使用CuTz-1作为光催化剂,可以将染料混合物(甲基橙,甲基蓝,亚甲基蓝和若丹明B)完全脱色。或自然阳光。
更新日期:2018-10-18
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