β-Cyclodextrin polymer networks stabilized gold nanoparticle with superior catalytic activities  

作　　者：Yong Zhang Bing Hu Xiao-Mei Cao Liang Luo Yu Xiong Zhi-Peng Wang Xin Hong San-Yuan Ding 

机构地区：[1]Key Laboratory of Organo-pharmaceutical Chemistry,Gannan Normal University,College of Chemistry and Chemical Engineering,Ganzhou 341000,China [2]State Key Laboratory of Applied Organic Chemistryy College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China [3]Department of Chemistry,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》2021年第4期1018-1025,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21865003,21562003);China Postdoctoral Science Foundation(No.2018M640114);National Undergraduate Training Programs for Innovation and Entrepreneurship(No.201910418003);the Gannan Normal University Innovation Fund(No.YCX19A002)for generous support.

摘　　要：Support materials play a significant role in heterogeneous nanocatalysis.In this work,β-cyclodextrin(β-CD)was used directly as a monomer to construct polymer networks for gold nanoparticles(Au NPs)immobilization.Using the simple nucleophilic substitution reaction,β-CD based polymer networks(β-CDP-N andβ-CDP-C)were successfully prepared.Compared toβ-CDP-C,the hydroxyl groups and N atoms inβ-CDP-N played a synergistic role in immobilizing smaller Au NPs,thus leading to high catalytic activities.Notably,the apparent rate constant(Kapp)value for Au@β-CDP-N in the reduction of 4-nitrophenol to 4-aminophenol is 14.15×10^(-2)s^(-1),which shows a significant improvement over all previously reported Au NPs with solid supports under similar conditions.Considering the negligible porosity of theβ-CDP-N support,we purposed a"capture-catalysis-release"model to explain the high catalytic activity of Au@β-CDP-N.This explanation is supported by the guest-responsive properties ofβ-CDP-N.Moreover,the Au@β-CDP-N is easily recycled and maintained its high catalytic efficiency after seven successful cycles.

关 键 词：β-cyclodextrin polymer Au nanoparticles superior catalytic activity 4-nitrophenol reduction 

分 类 号：O64[理学—物理化学] TB383[理学—化学]