无机材料学报 ›› 2011, Vol. 26 ›› Issue (2): 159-164.DOI: 10.3724/SP.J.1077.2011.00159 CSTR: 32189.14.SP.J.1077.2011.00159

• 研究论文 • 上一篇    下一篇

CeO2 纳米管的水热合成、表征及性能研究

赵晓兵1, 游静1, 陆晓旺1, 陈志刚2   

  1. 1. 常州大学 材料科学与工程学院, 常州213164; 2. 苏州科技学院 化学与生物工程学院, 苏州215011
  • 收稿日期:2010-04-12 修回日期:2010-06-24 出版日期:2011-02-20 网络出版日期:2011-01-21
  • 作者简介:赵晓兵(1975-), 男, 博士, 副教授. E-mail: zhaoxiaobing00@163.com
  • 基金资助:

    国家自然科学基金(20771047);江苏省自然科学基金(BK2008541)

Hydrothermal Synthesis, Characterization andProperty of CeO2 Nanotube

ZHAO Xiao-Bing1, YOU Jing1, LU Xiao-Wang1, CHEN Zhi-Gang2   

  1. 1. Faculty of MaterialsScience and Engineering, Changzhou University, Changzhou 213164, China; 2.Department of Chemistry and Bioengineering, Suzhou Universityof Science and Technology, Suzhou 215011, China
  • Received:2010-04-12 Revised:2010-06-24 Published:2011-02-20 Online:2011-01-21
  • Supported by:

    National Nature Science Foundation of China(20771047) ; Nature Science Foundation of JiangSu (BK2008541)

摘要: 以P123为表面活性剂, 采用水热法合成CeO2纳米管. 研究反应时间、反应温度、表面活性剂浓度对CeO2纳米管形成的影响规律. 采用TEM、XRD、N2吸脱附仪对样品的微观结构进行表征. 并考察CeO2纳米管对亚甲基蓝溶液的催化性能. 结果表明, 当反应时间为72 h、反应温度为160℃、 n (P123): n( CeCl3 · 7H2O)=1:5 时, 可制备出单晶结构的CeO2纳米管. 所制备的CeO2纳米管外径为40~60nm, 内径为20 nm左右, 长度为500~1000nm. CeO2纳米管是由Ce(OH)3晶种的溶解再结晶-异向生长-自我卷曲形成的. 相对于CeO2纳米颗粒和CeO2纳米棒, CeO2纳米管对亚甲基蓝染料的脱色率有明显提高. 这与CeO2纳米管孔道的吸附作用, 暴露的高反应活性面(110)和表面有大量缺陷有关.

关键词: 水热法, CeO2纳米管, 催化

Abstract: CeO2nanotubes were synthesized by hydrothermal method using PEO-PPO-PEO (P123) as surfactant.The effects of reaction time, reaction temperature and concentration ofsurfactant on the formation of CeO2 nanotubes were investigated. Themicrostructures of the samples were characterized by transmission electron microscope,X-ray diffraction and N2 adsorption-desorption methods. The catalyticproperties of CeO2 samples on methylene blue were also examined. Theresults indicate that single crystal CeO2 nanotubes are obtainedwhen reaction time is 72 h, reaction temperature is 160℃ and molar ratio of P123 to CeCl3·7H2O is 1:5. Theexternal diameter of CeO2 nanotubes is 40-60 nm, theirinternal diameter is about 20 nm and their length is 500-1000 nm. Theformation mechanism of CeO2 nanotubes is subjected to dissolution-recrystallization,anisotropic growth and self crimping of Ce(OH)3 crystal seed.Compared with CeO2 nanoparticles and nanorods, CeO2nanotubes demonstrate better catalytic activity on methylene blue, which isattributed to the remarkable adsorption of pore, exposure of higher activesurface (110) and considerable defects on the surface of CeO2nanotubes.

Key words: hydrothermal, CeO2 nanotube, catalysis

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