Zhang Youjin, Han Kaidong, Cheng Tao, Fang Zhiyong
Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, People's Republic of China.
Inorg Chem. 2007 May 28;46(11):4713-7. doi: 10.1021/ic0701458. Epub 2007 May 2.
Novel LaCO3OH microspheres with the hexagonal phase were synthesized by a hydrothermal method using La(NO3)(3).6H2O and urea CO(NH2)2 as the starting materials. Various experimental parameters were examined, such as the reaction temperature, the reaction time, and the molar ratios of the starting reagents. The as-synthesized products were characterized by powder X-ray diffraction, transmission electron microscopy, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and photoluminescence (PL). The PL result showed one broad emission band centered at 438 nm (lambdaex=365 nm) of the pure LaCO3OH microspheres. In addition, a possible formation mechanism of LaCO3OH microspheres and the PL property of pure LaCO3OH microspheres were discussed.
以La(NO3)3·6H2O和尿素CO(NH2)2为原料，采用水热法合成了具有六方相的新型LaCO3OH微球。考察了各种实验参数，如反应温度、反应时间和起始试剂的摩尔比。通过粉末X射线衍射、透射电子显微镜、场发射扫描电子显微镜、X射线光电子能谱、傅里叶变换红外光谱和光致发光(PL)对合成产物进行了表征。PL结果表明，纯LaCO3OH微球在438nm处有一个宽发射带(λex=365nm)。此外，还讨论了LaCO3OH微球的可能形成机理和纯LaCO3OH微球的PL性质。
