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Piezoelectric polarization modulates photocarrier kinetics via enhanced built-in field at heterojunctions

文献类型： 外文期刊

作者： Niu, Jiliang 1 ; He, Tingfeng 1 ; Qiu, Cheng 2 ; Song, Zhengguo 1 ;

作者机构： 1.Shantou Univ, Dept Mat & Environm Engn, Shantou 515063, Peoples R China

2.Xizang Acad Agr & Anim Husb Sci, Inst Agr Resources & Environm, Lhasa 850002, Xizang, Peoples R China

关键词： Built-in electric field; S -scheme; Zinc foam; In-situ growth; Piezo-photocatalysis

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 508 卷

页码：

收录情况： SCI

摘要： Piezoelectric polarization significantly enhances photocatalytic performance by modulating carrier dynamics through an amplified built-in electric field at heterojunctions. This study synthesizes S-scheme ZnO/N-CuO heterojunctions on zinc foam (ZF) via in-situ growth, achieving 98.3 % degradation of cefotaxime (CTX) within 30 min under combined light-ultrasound conditions. Experimental and theoretical analyses (DFT, PFM, KPFM) reveal that piezoelectric polarization intensifies the interfacial built-in field, driving efficient separation and migration of photogenerated carriers. The ZF@ZnO@N-CuO catalyst demonstrates exceptional stability (81.9 % efficiency after 10 cycles) and broad-spectrum antibiotic degradation capability. This work provides mechanistic insights into piezo-photocatalysis synergy and highlights its potential for environmental remediation.

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