Designed synthesis of chlorine and nitrogen co-doped Ti_(3)C_(2)MXene quantum dots and their outstanding hydroxyl radical scavenging properties

作     者：Lin Zhao Zhao Wang Yan Li Sen Wang Lifeng Wang Zhaojun Qi Qiang Ge Xiaoguang Liu Jin Zhong Zhang Lin Zhao;Zhao Wang;Yan Li;Sen Wang;Lifeng Wang;Zhaojun Qi;Qiang Ge;Xiaoguang Liu;Jin Zhong Zhang

作者机构：School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China Department of Chemistry and BiochemistryUniversity of CaliforniaSanta CruzCalifornia 95064United States 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第78卷第19期

页      面：30-37页

核心收录：

学科分类：0806[工学-冶金工程] 0817[工学-化学工程与技术] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：National Natural Science Foundation of China(Grant No.21674011,21404008) Beijing Municipal Natural Science Foundation(Grant No.2172040) Beijing Organization department outstanding talented person project(2013D009006000001) the Fundamental Research Funds for the Central Universities(FRF-GF-17-B11) 

主　　题：Ti_(3)C_(2)MXene quantum dots Chlorine and nitrogen co-doping Hydroxyl radical Scavenger 

摘      要：As a novel zero-dimensional(0D)material,metal carbides and/or carbonitrides(MXenes)quantum dots(MQDs)show unique photoluminescence properties and excellent ***,due to the limited synthesis methods and research to date,many new features have yet to be ***,to explore their new properties and expand biological applications,chlorine and nitrogen co-doped Ti_(3)C_(2)MXene quantum dots(Cl,N-Ti_(3)C_(2)MQDs)were designed and synthesized,and their hydroxyl radical scavenging properties were investigated for the first time,revealing outstanding ***,N-Ti_(3)C_(2)MQDs was directly stripped from bulk Ti_(3)Al C_(2)by electrochemical etching,while N and Cl are successfully introduced to carbon skeleton and Ti boundaries in the etching process by electrochemical reactions between selected electrolytes and Ti_(3)C_(2)skeleton,*** obtained Cl,N-Ti_(3)C_(2)MQDs exhibit large surface-to-volume ratio due to small particle size(ca.3.45 nm)and excellent higher scavenging activity(93.3%)and lower usage(12.5μg/m L)towards hydroxyl radicals than the previous reported graphene-based *** underlying mechanism of scavenging activity was also studied based on the reduction experiment with potassium permanganate(KMnO_(4)).The reducing ability of the intrinsic Ti_(3)C_(2)structure and electron donation of double dopants are the main contributors to the outstanding scavenging activity.