物理化学学报 >> 2010, Vol. 26 >> Issue (05): 1284-1290.doi: 10.3866/PKU.WHXB20100333

胶体及界面化学 上一篇    下一篇

粒径可控纳米CeO2的微乳液法合成

朱文庆, 许磊, 马瑾, 任建梅, 陈亚芍   

  1. 应用表面与胶体化学教育部重点实验室, 陕西师范大学化学与材料科学学院, 西安 710062; 西安工程大学环境与化学工程学院, 西安 710048
  • 收稿日期:2009-10-23 修回日期:2010-01-05 发布日期:2010-04-29
  • 通讯作者: 陈亚芍 E-mail:yschen@snnu.edu.cn

Size Controlled Synthesis of CeO2 Nanoparticles by a Microemulsion Method

ZHU Wen-Qing, XU Lei, MA Jin, REN Jian-Mei, CHEN Ya-Shao   

  1. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, P. R. China; College of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, P. R. China
  • Received:2009-10-23 Revised:2010-01-05 Published:2010-04-29
  • Contact: CHEN Ya-Shao E-mail:yschen@snnu.edu.cn

摘要:

以十六烷基三甲基溴化铵(CTAB)/正丁醇/正辛烷/硝酸铈(Ce(NO3)3)水溶液(氨水)所形成的反相微乳液体系合成CeO2前驱体, 利用热重(TG)和X射线衍射(XRD)分析方法确定了得到纳米CeO2的适宜焙烧温度为550 ℃, CeO2前驱体经550 ℃焙烧后得到纳米CeO2. 采用XRD、透射电镜(TEM)、紫外-可见(UV-Vis)分光光度计等表征手段分别对纳米CeO2的晶形、形貌、粒径及紫外吸收性质进行了表征, 该纳米CeO2粒子具有立方晶型结构, 分散性较好、粒径范围为5-18 nm. 考察了微乳液中正辛烷与正丁醇质量比、Ce(NO3)3浓度对纳米CeO2粒径的影响, 结果表明: 利用微乳液法, 通过改变微乳液中正辛烷与正丁醇质量比、Ce(NO3)3浓度能够对纳米CeO2粒径进行有效控制; 纳米CeO2的粒径均随着正辛烷与正丁醇质量比和Ce(NO3)3浓度的增大而减小. 同时, 对不同条件下制得的纳米CeO2的紫外吸收性质进行了考察.

关键词: 微乳液法, 纳米CeO2, 粒径可控, 合成, 紫外吸收性质

Abstract:

Precursors of CeO2 were synthesized in a reverse microemulsion composed of cetyltrimethylammonium bromide (CTAB), 1-butanol, 1-octane, Ce(NO3)3 brine (ammonia). The optimum calcination temperature (550 ℃) was derived from thermogravimetry (TG) analysis and X-ray powder diffraction (XRD). The CeO2 nanoparticles were then prepared by calcining the precursors at 550 ℃. The structures, morphologies, size, and UV absorption properties of the CeO2 nanoparticles were characterized by XRD, transmission electron microscopy (TEM), and UV-Vis spectroscopy. Cubic crystalline CeO2 nanoparticles of 5 -18 nm in size and with good monodispersity were obtained using this method. The influences of the mass ratio of 1-octane to 1-butanol and the concentration of Ce(NO3)3 on the size of the CeO2 nanoparticles were studied. Results showed that CeO2 nanoparticle size was dependent on the mass ratio of 1-octane to 1-butanol and the concentration of Ce(NO3)3. The size of the CeO2 nanoparticles decreased as the mass ratio of 1-octane to 1-butanol as well as the concentration of Ce(NO3)3 increased. In addition, we studied the UV absorption properties of the CeO2 nanoparticles by UV-Vis spectroscopy.

Key words: Microemulsion, CeO2 nanoparticle, Controlled size, Synthesis, UV absorption property

MSC2000: 

  • O648