催化作用
石墨氮化碳
吸附
纳米颗粒
化学工程
聚合物
材料科学
多孔性
色散(光学)
多相催化
表面改性
纳米技术
化学
有机化学
光催化
工程类
物理
光学
作者
Cheng Du,Xingwang Lan,Guangyu An,Qing Li,Guoyi Bai
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-04-28
卷期号:8 (18): 7051-7058
被引量:27
标识
DOI:10.1021/acssuschemeng.0c00771
摘要
The development of novel heterogeneous catalysts for converting CO2 into fine chemicals under mild conditions is extremely attractive but challenging. In this study, graphitic carbon nitride modified by porous organic polymer (POP) and highly dispersed Ag nanoparticles (Ag/POP@g-C3N4) was prepared as a highly efficient heterogeneous catalyst for CO2 conversion for the first time. The POP modifying g-C3N4 remarkably increases specific surface area and nitrogen species (N—H and C═N); as a result, the abundant porous structures together with anchoring sites allow tight immobilization and homogeneous dispersion of Ag nanoparticles. Benefiting from the effective incorporation, Ag/POP@g-C3N4 exhibited superior catalytic performance for the carboxylative cyclization of propargyl alcohols with CO2 under mild conditions. From the perspective of CO2 adsorption and controlled 1H NMR analyses, a plausible synergistic catalytic mechanism was proposed for the adsorption and activation of CO2 in combination with Ag/POP@g-C3N4 and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU).
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