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水热法合成氢氧化钇纳米管

田 俐, 陈稳纯, 陈 琳, 梁恩湘, 张 馨   

  1. 湖南科技大学 化学与化工学院, 湘潭 411201
  • 收稿日期:2008-06-30 修回日期:2008-09-03 出版日期:2009-03-20 网络出版日期:2009-03-20

Hydrothermal Synthesis of Yttrium Hydroxide Nanotubes

TIAN Li, CHEN Wen-Chun, CHEN Lin, LIANG En-Xiang, ZHANG Xin   

  1. Hunan University of Science and Technology, School of Chemistry and Chemical Engineering, Xiangtan 411201,China
  • Received:2008-06-30 Revised:2008-09-03 Published:2009-03-20 Online:2009-03-20

摘要: 以Y2O3为原料,在密闭反应器中采用水热法合成氢氧化钇纳米管. 分别采用X射线粉末衍射(XRD)、扫描电镜(SEM)、能谱(EDS)和热重-差热分析(TG-DTA)方法对所合成的氢氧化钇纳米管进行了物相、形貌、成分表征和热稳定性分析. 对影响氢氧化钇纳米管形成的反应条件如水热温度和水热时间进行了研究,采用透射电镜(TEM)分析了产物各个生长阶段的形貌,推测了氢氧化钇纳米管的形成机理. 研究表明: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作为溶剂,pH值为11~12、反应温度为220℃、反应时间为24h;氢氧化钇纳米管的形成过程可以分为两个阶段:第一阶段为钇前驱体的产生,第二阶段为钇前驱体转变为氢氧化钇纳米管.

关键词: 水热合成, 氢氧化钇, 纳米管

Abstract: Yttrium hydroxide nanotubes were synthesized by hydrothermal method using Y2O3 as raw materials. And then yttrium hydroxide nanotubes were characterized by X-ray diffraction (XRD),scan electron microscope (SEM), energy-dispersive X-ray spectroscope (EDS) and thermogravimetry-differential thermal analysis(TG-DTA)to investigate the phase, morphology, composition and heat stability of the products. Effects of reaction temperature and hydrothermal time on the formation of hydroxide yttrium nanotubes were studied. The results indicate that the optimal reaction conditions of hydroxide yttrium nanotubes are as follows: T=220℃, pH=11-12 and t=24h. The formation mechanism of hydroxide yttrium nanotubes is suggested to be twostep process,the initiative production of yttrium precursor and the successional achievement of hydroxide yttrium nanotubes.

Key words: hydrothermal synthesis, yttrium hydroxide, nanotubes

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