Highly dispersed gold nanoparticles anchoring on post-modified covalent organic framework for catalytic application
Highly dispersed gold nanoparticles anchoring on post-modified covalent organic framework for catalytic application
复制标题
高度分散的金纳米颗粒锚定在后改性共价有机框架上用于催化应用
DOI：
10.1016/j.cej.2019.123471
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发表时间：
2020-07-01
影响因子：
15.1
通讯作者：
Zhang, Chun
中科院分区：
文献类型：
--
作者：
Zhang, Qing-Pu;Sun, Yu-ling;Zhang, Chun
采用后修饰策略，以丙烯基官能化的含硫共价有机骨架（A-COF）为原料，通过硫醇-烯“点击”反应合成了含硫共价有机骨架（S-COF）。此外，以所得到的S-COF为基质，成功制备了粒径分布窄（4.2 ± 1.2 nm）、分布密度高的COF负载Au纳米粒子（Au-S-COF），该纳米粒子对对硝基苯酚的还原反应表现出优异的催化活性，并具有显著的稳定性和可循环性。在Au-S-COF非均相催化体系中，Au NPs与COF表面含硫基团之间的强锚定能力增强了Au NPs与COF的结合，从而保持了NPs的分散性和长期催化活性。
Post-modification strategy was used to synthesize sulfur-containing covalent organic framework (S-COF) by thiol-ene "click" reaction from a propenyl-functionalized COF (A-COF). Furthermore, the obtained S-COF was used as matrix to successfully prepare COF-supported Au NPs (Au-S-COF) with narrow size distribution (4.2 +/- 1.2 nm) and high distribution density, which shows excellent catalytic activities in reduction of 4-nitrophenol with remarkable stability and recyclability. In the Au-S-COF heterogeneous catalytic system, the strong anchoring ability between Au NPs and sulfur-containing groups over COF's surface enhance the binding of Au NPs with COFs to maintain the dispersity of NPs and their catalytic activity for long-term performance.