【摘要】 用溶胶-凝胶法制备钛（Ti）掺杂BiFeO₃纳米颗粒（Ti-BiFeO₃）,研究不同煅烧温度对Ti掺杂BiFeO₃结构调控及光催化性能的影响,用X射线衍射（XRD）、扫描电子显微镜（SEM）、能谱分析（EDS）、紫外-可见（UV-Vis）光谱技术对颗粒的相结构、形貌、原子比例、光催化性能等进行测试及分析,并以罗丹明-B为目标降解物,对Ti掺杂BiFeO₃光催化性能进行研究.结果表明:Ti掺杂BiFeO₃样品在不同煅烧温度均出现Bi₂Fe₄O₉相;煅烧温度可对Bi₂Fe₄O₉的含量进行调控,在650℃煅烧样品中含有适量的Bi₂Fe₄O₉相,能有效提高Ti掺杂BiFeO₃的光催化活性,且具有较高的降解活性,60 min内降解效率达85%.更多还原

【Abstract】 Titanium-doped BiFeO₃ nanoparticles was prepared by using the sol-gel method. The effects of different calcination temperatures on the structure of Ti-BiFeO₃ and the photocatalytic performance were studied. X-ray diffraction（XRD）, scanning electron microscopy（SEM）, energy dispersive spectromentry（EDS）, ultraviolet visible（UV-Vis） spectroscopy were used to test and analyze the phase structure, morphology, atomic ratio and photocatalytic performance of the particles. Taking Rhodamine-B as the target degradation product, the photocatalytic performance of Ti-doped BiFeO₃ was studied. The results show that there are Bi₂Fe₄O₉ phases at different calcination temperatures in Ti-doped BiFeO₃ samples. The calcination temperature can control the content of Bi₂Fe₄O₉. There are appropriate amount of Bi₂Fe₄O₉ phase in the calcined sample at 650 ℃, which can effectively improve the photocatalytic activity of Ti-doped BiFeO₃ and degradation activity. The degradation efficiency is 85% within 60 min.更多还原