Double enzyme mimetic activities of multifunctional Ag nanoparticle-decorated Co_(3)V_(2)O_(8)hollow hexagonal prismatic pencils for application in colorimetric sensors and disinfection  

作　　者：Ying Gao Peng Ju Yu Zhang Yuxin Zhang Xiaofan Zhai Jizhou Duan Baorong Hou 

机构地区：[1]Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao,266071,PR China [2]Key Laboratory of Marine Eco-Environmental Science and Technology,Marine Bioresource and Environment Research Center,First Institute of Oceanography,Ministry of Natural Resources,Qingdao,266061,PR China [3]University of Chinese Academy of Sciences,Beijing,100049,PR China [4]Open Studio for Marine Corrosion and Protection,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao,266071,PR China [5]Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao,266071,PR China [6]College of Materials Science and Engineering,Chongqing University,Chongqing,400044,China

出　　处：《Nano Materials Science》2024年第2期244-255,共12页纳米材料科学（英文版）

基　　金：supported by National Natural Science Foundation of China(52208272,41706080 and 51702328);the Basic Scientific Fund for National Public Research Institutes of China(2020S02 and 2019Y03);the Basic Frontier Science Research Program of Chinese Academy of Sciences(ZDBS-LY-DQC025);the Young Elite Scientists Sponsorship Program by CAST(No.YESS20210201);the Strategic Leading Science&Technology Program of the Chinese Academy of Sciences(XDA13040403);the Key Research and Development Program of Shandong Province(Major Scientific and Technological Innovation Project)(2019JZZY020711).

摘　　要：Since the catalytic activity of most nanozymes is still far lower than the corresponding natural enzymes,there is urgent need to discover novel highly efficient enzyme-like materials.In this work,Co_(3)V_(2)O_(8)with hollow hexagonal prismatic pencil structures were prepared as novel artificial enzyme mimics.They were then decorated by photo-depositing Ag nanoparticles(Ag NPs)on the surface to further improve its catalytic activities.The Ag NPs decorated Co_(3)V_(2)O_(8)(ACVPs)showed both excellent oxidase-and peroxidase-like catalytic activities.They can oxidize the colorless 3,3’,5,5’-tetramethylbenzidine rapidly to induce a blue change.The enhanced enzyme mimetic activities can be attributed to the surface plasma resonance(SPR)effect of Ag NPs as well as the synergistic catalytic effect between Ag NPs and Co_(3)V_(2)O_(8),accelerating electron transfer and promoting the catalytic process.ACVPs were applied in constructing a colorimetric sensor,validating the occurrence of the Fenton reaction,and disinfection,presenting favorable catalytic performance.The enzyme-like catalytic mechanism was studied,indicating the chief role of⋅O_(2)-radicals in the catalytic process.This work not only discovers a novel functional material with double enzyme mimetic activity but also provides a new insight into exploiting artificial enzyme mimics with highly efficient catalytic ability.

关 键 词：Co_(3)V_(2)O_(8) Ag NPs Enzyme mimetic Colorimetric sensor DISINFECTION 

分 类 号：O657.3[理学—分析化学] TQ426.97[理学—化学]