Boosting Piezo-Catalytic Activity of KNN-Based Materials with Phase Boundary and Defect Engineering

Jiayang Liao; Xiang Lv; Xi-xi SunJunhua LiHaomin WangQiang ChenHanpeng LuDuan WangJian BiJiagang Wu

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Boosting Piezo-Catalytic Activity of KNN-Based Materials with Phase Boundary and Defect Engineering

机译：Boosting Piezo-Catalytic Activity of KNN-Based Materials with Phase Boundary and Defect Engineering

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Although the piezo-catalysis is promising for the environmental remediationand biomedicine, the piezo-catalytic properties of various piezoelectricmaterials are limited by low carrier concentrations and mobility, and rapidelectron-hole pair recombination, and reported regulating strategies are quitecomplex and difficult. Herein, a new and simple strategy, integrating phaseboundary engineering and defect engineering, to boost the piezo-catalyticactivity of potassium sodium niobate ((K, Na)NbO_3, KNN) based materials isinnovatively proposed. Tur strategy is validated by exampling 0.96(K_(0.48)Na_(0.52))Nb_(0.955)Sb_(0.045)O_3-0.04(Bi_xNa_(4-3x))_(0.5)ZrO_3-0.3%Fe_2O_3 material having phaseboundary engineering and conducted the defect engineering via the highenergysand-grinding. A high reaction rate constant k of 92.49 × 10~(?3) min~(?1)in the sand-grinding sample is obtained, which is 2.40 times than that ofnon-sand-grinding one and superior to those of other representative lead-freeperovskite piezoelectric materials. Meanwhile, the sand-grinding sample hasremarkable bactericidal properties against Escherichia coli and Staphylococcusaureus. Superior piezo-catalytic activities originate from the enhancedelectron-hole pair separation and the increased carrier concentration. Thisstudy provides a novel method for improving the piezo-catalytic activitiesof lead-free piezoelectric materials and holds great promise for harnessingnatural energy and disease treatment.

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来源
《Advanced functional materials》 |2023年第34期|2303637.1-2303637.11|共11页
作者
Jiayang Liao; Xiang Lv; Xi-xi SunJunhua LiHaomin WangQiang ChenHanpeng LuDuan WangJian BiJiagang Wu;
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作者单位

College of Materials Science and EngineeringSichuan UniversityChengdu 610065, China, College of Chemistry and Materials ScienceSichuan Normal UniversityChengdu 610066, China;

College of Materials Science and EngineeringSichuan UniversityChengdu 610065, China;

Institute for Advanced StudyChengdu UniversityChengdu 610106, ChinaDepartment of OrthopedicsWest China HospitalSichuan UniversityChengdu 610041, ChinaCollege of Chemistry and Materials ScienceSichuan Normal UniversityChengdu 610066, China, Mianyang Teachers’ CollegeMianyang 621000, China;

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正文语种英语
中图分类无线电电子学、电信技术;工程材料学;
关键词
anti-bacteria; oxygen vacancies; phase boundary engineering; piezocatalytic activities; potassium sodium niobate;

Boosting Piezo-Catalytic Activity of KNN-Based Materials with Phase Boundary and Defect Engineering

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