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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (20): 1917-1920. 上一篇    下一篇

研究论文

钛铁矿型CoTiO3纳米材料的制备及性能表征

周国伟*,1，陈代荣2，徐桂英2   

  1. (1山东轻工业学院化学工程学院 济南 250100)
    (2山东大学胶体与界面化学教育部重点实验室 济南 250100)
  • 投稿日期:2005-02-05 修回日期:2005-06-14 发布日期:2010-12-10
  • 通讯作者: 周国伟

Synthesis and Characterization of Ilmenite-type CoTiO3 Nanomaterials

ZHOU Guo-Wei*,1, CHEN Dai-Rong2, XU Gui-Ying2   

  1. (1 School of Chemical Engineering, Shandong Institute of Light Industry, Jinan 250100)
    (2 Key Laboratory for Colloid and Interface of Ministry of Education of China, Shandong University, Jinan 250100)
  • Received:2005-02-05 Revised:2005-06-14 Published:2010-12-10
  • Contact: ZHOU Guo-Wei

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以Co(NO3)2•6H2O和TiO2 (P-25)为原料, 在十六烷基三甲基溴化铵(CTAB)/水形成的胶束溶液中, 首先制得纳米氧化钴Co3O4-TiO2复合材料, 该复合材料经600和700 ℃煅烧后制备了钛铁矿型CoTiO3纳米材料. 以X射线衍射(XRD)、透射电子显微镜(TEM)、紫外-可见(UV-vis)、拉曼(Raman)光谱和X射线光电子能谱(XPS)对其结构特征和光谱性能进行了研究. 用TEM形貌观察, 粒子基本为球形; 纳米CoTiO3的UV-vis吸收峰明显红移; 经Raman光谱和XPS分析, 进一步表明600和700 ℃煅烧后形成了Ti—O—Co键.

关键词: 钛铁矿型CoTiO3, 纳米材料, 胶束, 光谱性能

The nanostructural composite materials of titanium dioxide TiO2 and cobalt oxide Co3O4 were prepared using cobalt nitrate hexahydrate Co(NO3)2•6H2O and titanium dioxide (TiO2, P-25) as precursors in cetyltrimethylammonium bromide (CTAB)/H2O micelle solution. The ilmenite-type CoTiO3 nanomaterials could be obtained when the composite powders were calcinated at 600 and 700 ℃. The nanostructure composition and spectroscopic characterization of these nanomaterials at different calcination temperatures were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis spectroscopy and Raman spectroscopy. TEM image showed that the nanoparticles were almost spherical. The UV-vis spectra showed that nanosized CoTiO3 displayed significant red shift in the absorption band. The formation of bond Ti—O—Co at 600 and 700 ℃ calcination temperatures was also confirmed by the XPS and Raman spectra.

Key words: ilmenite-type CoTiO3, nanomaterial, micelle, spectroscopic characterization