| 形貌对BaTiO3压电催化性能的影响 | |
| Morphology effects on the piezocatalytic performance of BaTiO3 | |
| 摘要: 合成了颗粒状、立方体状、纤维状和片状的BaTiO3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BaTiO3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BaTiO3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2 g·L-1、超声频率为40 kHz、染料质量浓度为5 mg·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BaTiO3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。 | |
| 关键词: BaTiO3 形貌 动力学 压电催化 | |
| 基金项目: 江西省自然科学基金(No.2023ACB204017)、国家自然科学基金(No.52460003)、江西省自然科学基金(No.20242BAB25319)、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)和2021年度开放课题“硅材料国家重点实验室”项目(No.SKL2021-04)资助。 | |
| Abstract: BaTiO3 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 BaTiO3 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 BaTiO3 nanosheets is due to the generated higher potential. The degradation of rhodamine B (RhB) dyes by BaTiO3 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. | |
| Keywords: BaTiO3 morphology dynamics piezocatalysis | |
| 投稿时间：2024-05-21 修订日期：2024-11-12 | |
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| 胡志文,李萍,杨玉龙,董伟霞,包启富.形貌对BaTiO3压电催化性能的影响[J].无机化学学报,2025,41(2):339-348. | |
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