Synergically enhanced piezocatalysis performance of eco-friendly(K_(0.52)Na_(0.48))NbO_(3) through ferroelectric polarization and defects

作     者：Min Zhou Laijun Liang Dingze Lu Xiaomei Lu Zheng Wang Fengzhen Huang Pengfei Cheng Dongdong Liu Mengqi Tian Qiuping Wang Yunjie Zhang Min Zhou;Laijun Liang;Dingze Lu;Xiaomei Lu;Zheng Wang;Fengzhen Huang;Pengfei Cheng;Dongdong Liu;Mengqi Tian;Qiuping Wang;Yunjie Zhang

作者机构：School of ScienceXi’an Polytechnic UniversityXi’an 710048China National Laboratory of Solid State Microstructures and Physics SchoolNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China School of Advanced Materials and NanotechnologyXidian UniversityXi’an 710126China National Engineering Laboratory for Modern SilkCollege of Textile and Clothing EngineeringSoochow UniversitySuzhou 215123China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2023年第30卷第10期

页      面：2044-2054页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China (Nos.52172116 and 62171214) the Natural Science Basic Research Program of Shaanxi (Nos.2021JQ-655,2020JQ-828,2021JQ-188,2021JM-442,and 2020JQ-822) the Shaanxi Provincial Association of Science and Technology Youth Talents Lifting Plan (No.20180418) the Scientific Research Foundation for Ph.D.of Xi’an Polytechnic University (No.BS201877) the Special Scientific Research Project in Shaanxi Province Department of Education (No.21JK0653) 

主　　题：piezocatalytic water purification ferroelectric polarization beneficial defects 

摘      要：Piezocatalysis has attracted unprecedented research interest as a newly emerging catalysis ***,the inherent insulating property of ferroelectric materials ultimately leads to the poor vibration-electricity conversion ***,this work reports the(K_(0.52)Na_(0.48))NbO_(3) ferroelectric ceramics(KNNFCx),for which the FeCo modification strategy is *** substitution of the moderate amount of FeCo(x=0.015)at Nb site not only optimizes ferroelectricity but also produces beneficial defects,notably increasing Rhodamine B water purification efficiency to 95%.The pinning effect of monovalent oxygen vacancies on ferroelectric domains is responsible for the excellent ferroelectric polarization of KNNFC0.015 through the generation of an internal field to promote charge carriers separation and reduce nonradiative ***,the accompanying electron carriers can easily move to the material surface and participate in redox reactions because they have low activation ***,ferroelectric polarization and defects play synergetic roles in enhancing piezocatalytic performance.