| 低温合成四方相BaTiO3及其压电催化性能 | |
| Low-temperature synthesis of tetragonal BaTiO3 for piezocatalysis | |
| 摘要: 基于淀粉糊化机制低温合成了四方相BaTiO3粉体。采用扫描电子显微镜、透射电子显微镜、X射线衍射、傅里叶变换红外光谱、紫外可见吸收光谱、X射线光电子能谱对合成粉体的形貌、物相进行表征；在超声条件下，以系列典型染料为降解对象测试BaTiO3压电催化性能。结果显示，煅烧温度为600℃时即可获得四方相BaTiO3粉体，且随着温度的提升，结晶度逐渐增加；当煅烧温度为700℃时，合成的BaTiO3粉体尺寸分布均匀，分散度良好，呈现类立方体状；在超声驱动下，BaTiO3降解罗丹明B、刚果红、甲基橙染料时均展现出良好的效果，反应速率常数分别为1.090×10-2、1.113×10-2、1.084×10-2 min-1，并以降解刚果红为对象揭示其压电催化的机理，即空穴和超氧自由基是降解过程中的主要反应物质。 | |
| 关键词: 淀粉糊化 低温 BaTiO3 压电催化 | |
| 基金项目: 江西省重大自然科学基金（No.20232ACB204017）、江西省教育厅科学技术研究项目（No.GJJ2201048）、景德镇市科技厅项目（No.20212GYZD009-18、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 was synthesized at low-temperatures based on the starch gelatinization mechanism. The morphology and phase structure of as-synthesized samples were characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), UV visible (UV-Vis) absorption spectra, and X-ray photoelectron spectroscopy (XPS). The piezocatalytic performance of BaTiO3 was tested targeting a series of typical dyes for degradation. The results showed that tetragonal BaTiO3 powder was obtained at a calcination temperature of 600℃, and the crystallinity gradually increased with the increase in temperature. Cubic-like BaTiO3 with uniform size distribution was synthesized at a calcination temperature of 700℃; The degradation of rhodamine B (RhB), Congo red (CR), and methyl orange (MO) dyes by BaTiO3 all showed good performance, with reaction rate constants of 1.090×10-2, 1.113×10-2, and 1.084×10-2 min-1, respectively. Furthermore, the mechanism of piezocatalysis reveals that the hole (h+) and superoxide radicals (·O2-) are the main reactive species in the degradation process by targeting the degradation of CR. | |
| Keywords: starch gelatinization low-temperature BaTiO3 piezocatalysis | |
| 投稿时间：2023-12-08 修订日期：2024-03-13 | |
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| 胡志文,董伟霞,包启富,李萍.低温合成四方相BaTiO3及其压电催化性能[J].无机化学学报,2024,40(5):857-866. | |
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