• 其他栏目

    陈硕

    • 教授   博士生导师   硕士生导师
    • 主要任职:无
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 在职信息:在职
    • 所在单位:环境学院
    • 学科:环境工程 环境科学
    • 办公地点:大连理工大学环境学院B717
    • 联系方式:0411-84706263
    • 电子邮箱:

    访问量:

    开通时间 :..

    最后更新时间:..

    A surface plasmon-enhanced nanozyme-based fenton process for visible-light-driven aqueous ammonia oxidation

    点击量:

    论文类型:期刊论文

    第一作者:Zhang, Qi

    通讯作者:Chen, S (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Minist Educ, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China.

    合写作者:Chen, Shuo,Wang, Hua

    发表时间:2018-09-07

    发表刊物:GREEN CHEMISTRY

    收录刊物:SCIE

    卷号:20

    期号:17

    页面范围:4067-4074

    ISSN号:1463-9262

    摘要:By incorporating glucose oxidase-like activity and surface plasmon resonance (SPR) of Au nanoparticles (AuNPs), a novel nanozyme-Fenton system is designed, i.e., ultrasmall AuNPs and -FeOOH microcrystals are grown on porous carbons for constructing a nanozyme-Fenton catalyst. AuNPs can catalytically oxidize glucose with oxygen for producing H2O2 (the crucial reagent in Fenton process) and gluconic acid (regulating the pH of micro-environment). Due to the SPR effect, the interaction between the glucose molecules and oscillating local electromagnetic fields contributes to the activation of the glucose molecules, promoting the reaction with O-2 in close proximity, thus enhancing the production of H2O2. The heat released from AuNPs by absorbing light energy can increase the system temperature to the optimum condition of the enzymatic reaction. Hot electrons from plasmon-excited AuNPs promote charge separation at the Au/-FeOOH interface, leading to efficient cycling of Fe3+/Fe2+. Besides, growing these -FeOOH nanocrystals on the porous structures of carbon frameworks is beneficial for the electron transfer between the carbon and -FeOOH, and this restricts the leaching of iron ions. This study can provide a novel path for the development of a Fenton-like reaction based on a photo-induced surface plasmon-enhanced nanozyme-Fenton catalyst to improve the OH production efficiency.