反应参数对氢氧化钇纳米管合成的影响

Influence of reaction parameters on fabrication of yttrium hydroxide nanotubes

通过简单的、低耗的水热合成方法，以Y2O3为原料，在无模板条件下大规模地制备了氢氧化钇纳米管，采用X射线粉末衍射（XRD）、扫描电镜（SEM）和能谱（EDS）测试技术对合成产物进行了物相、形貌和成分的表征．氢氧化钇纳米管内径为200—300nm，外径为400—500nm，壁厚为100-200nm，分散性好．研究了几种关键因素对氢氧化钇纳米管合成的影响．结果表明：水热法制备氢氧化钇纳米管材料的最佳合成条件是乙醇和水的体积比为1：2；采用氢氧化钠溶液调节反应体系pH值为11—12；反应温度为220℃、反应时间为24h．

Yttrium hydroxide nanotubes were large-scalely synthesized by template-free hydrothermal method using Y203 as raw materials. And then yttrium hydroxide nanotubes were characterized by X-ray diffraction （XRI））, scan electron microscopy （SEM）, energy-dispersive X-ray spectroscopy （EDS） to investigate the phase, morphology and composition. Effects of some reaction parameters, such as acidity of solution, the ratio of water and organic solvent, reaction temperature and time on the formation of hydroxide yttrium nanotubes were explored. The results indicate that the optimal reaction conditions of hydroxide yttrium nanotubes are as follows： the volume ration of ethanol and water is 1：2, T=220℃, pH=11 - 12 adjusted by sodium hydroxide solution, and t=24 h.