Highly dispersed gold nanoparticles anchoring on post-modified covalent organic framework for catalytic application

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 391; p. 123471
• Main Authors: Zhang, Qing-Pu, Sun, Yu-ling, Cheng, Guang, Wang, Zhen, Ma, Hui, Ding, San-Yuan, Tan, Bien, Bu, Jian-hua, Zhang, Chun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2020
• Subjects: Covalent organic framework; Gold nanoparticles; Heterogeneous catalysts; Post-modification; Covalent organic framework; Heterogeneous catalysts; Gold nanoparticles; Post-modification
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2019.123471

[Display omitted] •Sulfur-containing covalent organic framework (S-COF) was synthetized by post-modification strategy.•COF-supported Au NPs (Au-S-COF) has narrow size distribution (4.2 ± 1.2 nm) and high distribution density.•Au-S-COF exhibits excellent heterogeneous catalytic activity, stability and recyclability. 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.