A confined micro-reactor with a movable Fe_(3) O_(4) core and a mesoporous TiO_(2) shell for a photocatalytic Fenton-like degradation of bisphenol A  

作　　者：Pengpeng Qiu Tao Zhao Xiaohang Zhu Binota Thokchom Jianping Yang Wan Jiang Lianjun Wang Yuchi Fan Xiaopeng Li Wei Luo 

机构地区：[1]State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Institute of Functional Materials,Shanghai 201620,China [2]Indian Institute of Technology Guwahati,Guwahati 781039,India

出　　处：《Chinese Chemical Letters》2021年第4期1456-1461,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.5182220221972163 and 51772050);the Fundamental Research Funds for the Central Universities (No. 2232020D-02);Shanghai Sailing Program (No.20YF1400500);Shanghai Natural Science Foundation (No.20ZR1401500);Shanghai Rising-Star Program (No.18QA1400100);Youth Top-notch Talent Support Program of Shanghai,Science and Technology Commission of Shanghai Municipality (No.19520713200);Shanghai Scientific and Technological Innovation Project (No. 19JC1410400);Key Basic Research Program of Science and Technology Commission of Shanghai Municipality (No. 20JC1415300);DHU Distinguished Young Professor Program;Fundamental Research Funds for the Central Universities。

摘　　要：Photocatalysis and Fenton process are two primary and promising advanced oxidation processes to degrade organic pollutants.However,the practical applications of single photocatalysis and Fenton process are still limited.Introducing one of them into another to form a combined photocatalytic Fentonlike system has shown great potential but still faces challenges in designing a well-tailored catalyst.Herein,a confined photocatalytic Fenton-like micro-reactor catalyst with a movable Fe_(3) O_(4) core and a mesoporous TiO_(2) shell has been constructed via a successive Stober coating strategy,followed by an ultrasound assisted etching method.The resulting micro-reactor possesses well-defined yolk-shell structures with unifo rm mesopores(~4 nm),a large Brunauer-Emmett-Teller(BET) surface area(~166.7 m^(2)/g),a high pore volume(~0.56 cm^(3)/g) and a strong magnetization(~51 emu/g),as well as tunable reactor sizes(20-90 nm).When evaluated for degrading bisphenol A under solar light in the presence of peroxymo no sulfate,the micro-reactor exhibits a superior catalytic degradation perfo rmance with a high magnetic separation efficiency and an excellent recycle ability.The outstanding performance can be attributed to its unique textual structure,which leads to a great syne rgistic effect from the photocatalytic and Fenton-like process.This study gives an important insight into the design and synthesis of an advanced micro-reactor for a combined advanced oxidation processes(AOPs).

关 键 词：Photocatalytic Fenton-like reaction Yolk-shell MICRO-REACTOR Magnetic MESOPOROUS 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X703[环境科学与工程—环境工程]