DETA对水浴条件下Sm(OH)_3纳米晶的结构和光催化性能的影响

Influence of DETA on the structure and photo-catalytic activity of Sm(OH)_3 nanocrystallites prepared by water-bath process

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。

Samarium hydroxide( Sm(OH)_3) nano-crystallites with controllable size were successfully prepared using Sm(NO_3)_3·6H_2O,diethylenetriamine( DETA) as main raw materials and distilled water as reaction solution by a facile water bath process. The phase composition,surface groups,morphologies and optical properties of the samples were characterized by X-ray diffraction,Fourier transform infrared spectra,scanning electron microscopy and UV-Vis diffuse reflectance spectroscopy. The influence of different addition amount of DETA on the structure control and photo-catalytic activity of the prepared samples has been investigated. Results show that with the increase of DETA addition,the crystallinity,size,aspect ratio and photo-catalytic activity of the Sm(OH)_3 nanorods were decreased. Sm(OH)_3hexagonal prims with bigger aspect ratio prepared at 0. 40vol% of DETA shows high photo-catalytic activity to degrade Rhodamine B( Rh B),which degradation efficiency reaches 94. 2%.