Highly Efficient Photocatalytic Degradation of Dyes by a Copper–Triazolate Metal–Organic Framework,Chemistry - A European Journal

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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 Cu^I, which yields Cu^II, 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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