摘要
通过柠檬酸-硝酸盐燃烧法合成了钙钛矿(ABO3)及类钙钛矿(A2B2O5)型化合物BaFeO3,Sr2Fe2O5,Ca2Fe2O5,BaCoO2.93,Sr2Co2O5。用X射线衍射,紫外-可见光分光光度计,红外光谱分析和扫描电镜检测了合成样品。样品经过450℃烧结2h并在800℃烧结4h而获得。实验表明:在B位元素相同的情况下,A位元素离子半径越大越容易形成钙钛矿结构。实验中合成的具有钙钛矿或类钙钛矿结构的氧化物具有不同程度的光催化性能。
Perovskite （ABO3） and quasi-perovskite brownmillerite （A2B2O5） compounds （BaFeO3, Sr2Fe2O5, Ca2Fe2O5, BACoO2.93, Sr2Co2O5） were prepared by the citrate-nitrate combustion method. The compounds were measured by X-ray diffraction, ultraviolet-visible spectrophotometry, Fourier transform infrared spectroscopy and scanning electron microscopy. The calcination temperature of the samples was maintained at 450℃ for 2 h and 800℃ for 4 h. Experiments prove that the synthesized samples are inclined to form perovskite with larger ion radius of A-site elements when the B-site element was fixed. Synthesized perovskites and brownmillerites have certain photocatalysis properties.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2006年第9期1151-1153,共3页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(50574043)资助项目
关键词
钙钛矿
光催化
过渡金属
碱土金属
perovskite
photocatalysis
transition-metal
alkaline-earth metal
