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以Sm(NO3)_3·6H_2O、二乙烯三胺(DETA)为主要原料,蒸馏水为溶剂,在简单的水浴条件下成功地制备了尺寸可控的棒状结构的Sm(OH)_3纳米晶。采用X射线衍射仪(XRD)、傅里叶红外吸收光谱(FTIR)、扫描电子显微镜(SEM)和Lambda 950分光光度计分别对产物的物相、表面基团、形貌和光学性能进行表征,研究了不同DETA加入量对Sm(OH)_3纳米晶的结构的调控和光催化性能的影响。结果表明,水浴条件下,随着DETA的加入量的增加,Sm(OH)_3纳米棒的结晶性降低,尺寸减小,长径比减小,光催化活性减弱。当反应体系中DETA的含量为0.40%(体积分数)时,制得了对罗丹明B降解效率可达94.2%的长径比较大的六棱柱状结构的Sm(OH)_3纳米晶。
Sm (NO3) 3 6H2O and DETA as the main raw materials and distilled water as solvent, Sm (OH) 3 nanocrystals with controlled rod size were successfully prepared in a simple water bath. The phase, surface group, morphology and optical properties of the product were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and Lambda 950 spectrophotometer. The effects of different amounts of DETA on the structure and photocatalytic activity of Sm (OH) 3 nanocrystals were investigated. The results showed that the crystallinity of Sm (OH) 3 nanorods decreased, the size decreased, the aspect ratio decreased, and the photocatalytic activity decreased with the increase of DETA concentration in water bath. When the content of DETA in the reaction system is 0.40% (volume fraction), Sm (OH) 3 nanocrystals with hexagonal prism structure with large aspect ratio of 94.2% were obtained.