聊城大学学报（自然科学版）2026，Vol.39Issue(1)：84-93,10.DOI:10.19728/j.issn1672-6634.2025090001
Ba0.66Sr0.34TiO3-CuO异质结压电光催化协同增强可见光催化性能研究
Study on the piezo-photocatalytic synergy in Ba0.66 Sr0.34TiO3-CuO heterojunction for enhanced visible-light catalytic performance
摘要
Abstract
To address the issues of low piezoelectric catalytic activity and visible light nonresponse of tradi-tional piezoelectric materials,a type III heterostructure was constructed between the piezoelectric Ba0.66Sr0.34TiO3(BST)and the narrow-bandgap semiconductor CuO.This structure utilizes the dynamic built-in electric fields generated by BST under mechanical stress to effectively drive separation of photo-generated charge carriers.Meanwhile,the CuO with narrow-bandgap broaden the photoabsorption range of the piezoelectric material into the visible spectrum,thereby achieving synergistic effects between the pi-ezoelectric response and photocatalytic activity.The BST-CuO photocatalysts were fabricated using a com-bination of hydrothermal and wet chemical methods.Phase structure and microstructure characterization reveal that CuO nanosheets agglomerated on the BST surface with the increase of CuO loading.Under the synergistic action of ultrasound and visible light,the BST-CuO2 heterojunction achieves 59%rhodamine B degradation in 150 min,which was 1.6 times higher than that of pure BST.Notably,this efficiency was 3.3 times and 2.7 times higher than the degradation rates obtained under ultrasonication in the dark and stirring with light irradiation,respectively.Based on the comprehensive analysis of the active species,photocurrent spectroscopy and electrochemical impedance spectroscopy,the incorporation of CuO with a relatively narrow bandgap extends the optical absorption edge to the full-spectrum solar spectrum(200～800 nm).The ultrasound-activated dynamic built-in electric field induced by BST sustainably drives photo-induced charge carrier separation,thereby achieving optimized photocatalytic performance in BST-CuO.This study provides a novel approach for understanding the synergy mechanism of piezoelectricity and pho-tocatalysis.关键词
压电光催化/异质结构/载流子分离/能带工程Key words
piezo-photocatalysis/heterostructure/charge carrier separation/band engineering分类
化学化工引用本文复制引用
FAN Baoyan,YANG Shuang,ZHAO Yan,LIU Haibo,GUO Xiaoyu,WANG Zonghua..Ba0.66Sr0.34TiO3-CuO异质结压电光催化协同增强可见光催化性能研究[J].聊城大学学报（自然科学版）,2026,39(1):84-93,10.基金项目
国家自然科学基金项目(52202129) （52202129）
浙江省博士后科研项目择优资助(ZJ2023110) （ZJ2023110）
重庆科技大学硕士研究生创新计划项目(YKJCX2421608)资助 （YKJCX2421608）
