@article{Han2024, 
author = {Jun Han and Wenrou Tian and Ye Miao and Najun Li and Dongyun Chen and Qingfeng Xu and Hua Li and Jianmei Lu},
title = {Flexoelectricity in hydroxyapatite for the enhanced piezocatalytic degradation of phenanthrene in soil},
year = {2024},
journal = {Industrial Chemistry & Materials},
volume = {2},
number = {2},
pages = {300-308},
keywords = {Hydroxyapatite, Flexoelectricity, Piezocatalysis, Soil remediation, Gradient doping},
url = {https://www.sciopen.com/article/10.1039/d3im00093a},
doi = {10.1039/d3im00093a},
abstract = {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.}
}