低温合成四方相BaTiO3及其压电催化性能
Low-temperature synthesis of tetragonal BaTiO3 for piezocatalysis
胡志文 1董伟霞 1包启富 2李萍2
作者信息
- 1. 景德镇陶瓷大学材料科学与工程学院,景德镇 333403;浙江大学硅材料国家重点实验室,杭州 310027
- 2. 景德镇陶瓷大学材料科学与工程学院,景德镇 333403
- 折叠
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.
Abstract
BaTiO3 was synthesized at low-temperatures based on the starch gelatinization mechanism.The morphol-ogy and phase structure of as-synthesized samples were characterized by scanning electron microscopy(SEM),trans-mission 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 tem-perature.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.Further-more,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.
关键词
淀粉糊化/低温/BaTiO3/压电催化Key words
starch gelatinization/low-temperature/BaTiO3/piezocatalysis引用本文复制引用
基金项目
江西省重大自然科学基金(20232ACB204017)
江西省教育厅科学技术研究项目(GJJ2201048)
景德镇市科技厅项目(20212GYZD009-18)
景德镇市科技厅项目(20224GY008-16)
2021年度开放课题"硅材料国家重点实验室"项目(SKL2021-04)
出版年
2024
NETL
NSTL
万方数据