Flexoelectricity in hydroxyapatite for the enhanced piezocatalytic degradation of phenanthrene in soil  

作　　者：Jun Han Wenrou Tian Ye Miao Najun Li Dongyun Chen Qingfeng Xu Hua Li Jianmei Lu 

机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Collaborative Innovation Center of Suzhou Nano Science and Technology,Soochow University,Suzhou 215123,China

出　　处：《Industrial Chemistry & Materials》2024年第2期300-308,共9页工业化学与材料（英文）

基　　金：the financial support provided by the National Natural Science Foundation of China(51973148 and 21938006);the National Key Technology R&D Program(2020YFC1818401);Basic Research Project of Leading Technology in Jiangsu Province(BK20202012);project supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD).

摘　　要：Coupling the effects of flexoelectricity with piezoelectricity has been proved to effectively harvest mechanical energy.In this study,a composition-graded core–shell structure(HAP@FAP)was prepared by surface-gradient F-doping in hydroxyapatite,which could introduce flexoelectricity by a built-in strain gradient.A flexoelectric-boosted piezoelectric response was demonstrated by piezoresponse force microscopy(PFM)characterization,showing that the piezoelectric constant of HAP@FAP was increased by 2.25 times via a lattice strain gradient induced by chemical heterogeneities derived from the unique composition-graded core-shell structure.Thus,the piezocatalytic activity of HAP@FAP for phenanthrene(PHE)degradation in soil was enhanced.This work provides a new strategy for the modification of piezoelectric catalysts for the remediation of organics-contaminated soils on industrial land.

关 键 词：HYDROXYAPATITE FLEXOELECTRICITY Piezocatalysis Gradient doping Soil remediation 

分 类 号：X53[环境科学与工程—环境工程]