形貌对BaTiO_(3)压电催化性能的影响  

Morphology effects on the piezocatalytic performance of BaTiO_(3)

作　　者：胡志文 李萍 杨玉龙 董伟霞 包启富[1] HU Zhiwen;LI Ping;YANG Yulong;DONG Weixia;BAO Qifu(School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen,Jiangxi 333403,China;State Key Laboratory of Silicon Materials,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,景德镇333403 [2]浙江大学硅材料国家重点实验室,杭州310027

出　　处：《无机化学学报》2025年第2期339-348,共10页Chinese Journal of Inorganic Chemistry

基　　金：江西省自然科学基金(No.2023ACB204017);江西省自然科学基金(No.20242BAB25319);国家自然科学基金(No.52460003);江西省教育厅科学技术研究项目(No.GJJ2400906);景德镇市科技项目(No.20212GYZD009-18和20224GY008-16);2021年度开放课题“硅材料国家重点实验室”项目(No.SKL2021-04)资助。

摘　　要：合成了颗粒状、立方体状、纤维状和片状的BaTiO_(3)粉体,并采用扫描电子显微镜、X射线衍射、傅里叶变换红外光谱、紫外可见吸收光谱对合成粉体的物相、形貌进行表征;比较不同形貌、催化条件下BaTiO_(3)粉体的压电催化活性,并结合有限元分析解释了压电催化活性差异的原因。结果显示,片状形貌下的BaTiO_(3)粉体具有压电催化活性优势,原因在于其产生了高压电势。且当催化剂固含量为2g·L^(-1)、超声频率为40kHz、染料质量浓度为5mg·L^(-1)时具有较优的催化活性,并结合自由基捕获实验揭示了片状BaTiO_(3)压电催化降解罗丹明B(RhB)染料的机制,即超氧自由基和羟基自由基作为主要反应物实现了污染物的降解。BaTiO_(3)powers with different morphologies,including nanoparticles,cubes,wires,and sheets were synthesized.The morphology and phase structure of as-synthesized samples were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectra(FTIR),and UV visible(UV-Vis)absorption spectra.The piezocatalytic activity of BaTiO_(3)under different morphologies and catalytic conditions was compared,and the mechanism of differential piezocatalytic activity was explained based on finite element method simulation.The results show that the higher activity of BaTiO_(3)nanosheets is due to the generated higher potential.The degradation of rhodamine B(RhB)dyes by BaTiO_(3)nanosheets showed better catalytic activity when the solid content was 2 g·L^(-1),the ultrasonic frequency was 40 kHz and the dye mass concentration was 5 mg·L^(-1).Furthermore,the mechanism of piezocatalysis reveals that the hydroxyl radical(·OH)and superoxide radicals(·O2-)are the main reactive species in the degradation process by targeting the degradation of RhB.

关 键 词：BATIO3 形貌 动力学 压电催化 

分 类 号：O643.36[理学—物理化学] TQ174.9[理学—化学]