Oxygen vacancies boosted piezo-catalytic activity of (Ba0.9Ca0.1)(Ti0.85Zr0.15)O3 ceramics

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-05 DOI:10.1016/j.materresbull.2025.113481

Xinyu Deng , Jiaxin Ye , Daen Zhao , Luoping Yang , Guifen Fan , Qiaoji Zheng , Dunmin Lin

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Abstract

As a cost-effective, simple and feasible strategy for wastewater treatment, piezoelectric catalysis stands out for its unique energy conversion mechanism in recent years. Herein, oxygen vacancies have been induced in (Ba_0.9Ca_0.1)(Ti_0.85Zr_0.15)O₃ (BCZT) by a high-temperature annealing strategy to improve the piezoelectric catalytic performance of BaTiO₃-based lead-free ceramics. The annealed BCZT ceramic at 700 °C possesses a moderate concentration of oxygen vacancies (53 % O_V content), which can function as electron donors, significantly enhancing carrier mobility and providing electron-rich sites for adsorption and activation of O₂. Consequently, the BCZT ceramic annealed at 700 °C exhibits significant enhancement in the piezoelectric catalytic performance, with the degradation rate of Rhodamine B (RhB) reaching 95.3 % in 90 min, and a reaction rate constant k of 0.03303 min^-1. This study offers a valuable approach to improve the catalytic proficiency of piezoelectric materials by modulating oxygen vacancy content in perovskite piezoelectric materials.

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氧空位提高了（Ba0.9Ca0.1）（Ti0.85Zr0.15）O3陶瓷的压电催化活性

压电催化作为一种经济、简单、可行的废水处理策略，近年来以其独特的能量转换机制脱颖而出。本文采用高温退火方法在（Ba0.9Ca0.1）（Ti0.85Zr0.15）O3 （BCZT）中诱导出氧空位，以提高batio3基无铅陶瓷的压电催化性能。700℃退火后的BCZT陶瓷具有中等浓度的氧空位（OV含量为53%），可以作为电子供体，显著提高载流子迁移率，并为O2的吸附和活化提供富电子位点。结果表明，经700℃退火的BCZT陶瓷具有明显的压电催化性能，在90 min内对罗丹明B （RhB）的降解率达到95.3%，反应速率常数k为0.03303 min-1。该研究为通过调节钙钛矿型压电材料中的氧空位含量来提高压电材料的催化能力提供了一条有价值的途径。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.