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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Trifunctional metal-organic platform for environmental remediation: structural features with peripheral hydroxyl groups facilitate adsorption, degradation and reduction processes
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Trifunctional metal-organic platform for environmental remediation: structural features with peripheral hydroxyl groups facilitate adsorption, degradation and reduction processes

机译：用于环境修复的三官能金属 - 有机平台：外周羟基的结构特征促进吸附，降解和还原过程

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摘要

A Cd(II)-based metal-organic framework (MOF) {[Cd(PA)(4,4'-bpy)(2)](H2O)}(n) (where, PA = pamoic acid, and bpy = bipyridine) has been demonstrated to have trifunctional properties, namely as (i) an efficient and selective adsorbent for dyes, (ii) a visible-light-active photocatalyst for the degradation of dyes and (iii) a photocatalyst for Cr(VI) reduction. Hence, this material has a very good potential for application in environmental remediation. In particular, the MOF exhibits excellent selectivity toward cationic methylene blue (MB) dye adsorption and its separation over neutral (neutral red) and anionic (methyl orange) dyes. In addition, the catalyst has also been explored for the photocatalytic degradation of less adsorbed dyes, such as methyl orange (MO) and rhodamine B (RhB). Subsequently, the potential of the presented MOF for the photocatalytic reduction of Cr(VI) under visible light irradiation has also been investigated and the catalyst was found to reduce 95% of Cr(VI) within 3 h. Moreover, simultaneous one-pot photocatalytic reduction of Cr(VI) and dye degradation has been demonstrated with high efficiency using the same catalyst. The mechanism of adsorption could be correlated to the presence of peripheral hydroxyl groups in the MOF and the photocatalytic activity observed under visible light could be attributed to the optical properties of Cd-MOF. In principle, this work could broaden the utilization of single metal organic platform for multifunctional applications toward environmental remediation.
机译：基于CD（II）的金属 - 有机框架（MOF）{[CD（PA）（4,4'-BPY）（2）]（H2O）}（N）（其中，PA =丙酸，和BPY =已经证明了Biphyridine具有三官能的性质，即（I）染料的有效和选择性吸附剂，（ii）用于染料的染料的可见光活性光催化剂和（iii）的光催化剂，用于Cr（vi）减少的光催化剂。因此，这种材料具有很好的环境修复应用的潜力。特别地，MOF对阳离子亚甲基蓝（MB）染料吸附及其在中性（中性红）和阴离子（甲基橙色）染料上的分离具有优异的选择性。此外，还探讨了催化剂的光催化降解较少吸附的染料，例如甲基橙（Mo）和罗丹明B（RHB）。随后，还研究了在可见光照射下对Cr（VI）的光催化还原的所呈现的MOF的电位，发现催化剂在3小时内降低95％的Cr（VI）。此外，通过使用相同的催化剂，已经通过高效率对Cr（VI）和染料降解的同时进行一次光催化还原。吸附机制可以与MOF中的外周羟基的存在相关，并且在可见光下观察到的光催化活性可归因于CD-MOF的光学性质。原则上，这项工作可以扩大单金属有机平台对环境修复的多功能应用的利用。

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