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电化学(中英文) ›› 1999, Vol. 5 ›› Issue (4): 443-447. 

• 研究论文 • 上一篇    下一篇

电化学法制备高热稳定性锐钛矿型纳米TiO_2

褚道葆,周幸福,林昌健,谭建光   

  1. 安徽师范大学有机化学研究所!芜湖241000,安徽师范大学有机化学研究所!芜湖241000,厦门大学材料科学系!化学系,固体表面物理化学国家重点实验室厦门361005,厦门大学材料科学系!化学系,固体表面物理化学国家重点实验室厦门361005
  • 收稿日期:1999-11-28 修回日期:1999-11-28 出版日期:1999-11-28 发布日期:1999-11-28

Prparation of Nanocrystaline TiO_2(Anatase)with High Thermal and Textural Sability by Electrochemical Method

Chu DaoBao * Zhou Xingfu   

  1. (Inst.of Org.Chem.,Anhui Normal Univ.,Wuhu 241000) Lin Changjian Tang Jianguang (Dept.Mat.Sci.,Dept.Chem.,State Key Lab.for Phy.Chem.of Solid Surf., Xiamen Univ.,Xiamen 361005
  • Received:1999-11-28 Revised:1999-11-28 Published:1999-11-28 Online:1999-11-28

摘要: 以醇中加入少量有机胺导电盐作为电解液,以工业纯钛作“牺牲”阳极,控电流电解,可分别得到乙醇钛、异丙醇钛、正丁醇钛等的相应醇溶液.然后直接水解,经溶胶_凝胶(Sol_gel) 过程,形成凝胶前体,在450 ℃,720 ℃煅烧30 min 后,均得到高热稳定锐钛矿型(anatase) 纳米TiO2(10 nm 左右).通过FTIR,XRD,TEM 等测试手段,对钛醇盐和纳米TiO2 进行了表征.本文同时讨论了不同钛醇盐制备纳米TiO2 的优缺点,发现钛酸乙酯制备的纳米TiO2 具有更好的晶型结构和热稳定性

关键词: 电合成, 钛醇盐, 纳米TiO_2, Sol_gel

Abstract: Titanium alkoxides were prepared by anodic dissolution of metallic titanium in absolute ethanol in the presence of HN(C 2H 5) 2·HCl (electro_conductive additives).The solution was directly hydrolyzed to prepare nanocrystalline of TiO 2 (about 10nm)by a sol_gel process.The precursor gels was calcined at T =450 ℃ and 720 ℃for 30 min,and nanocrystalline of TiO 2 (anatase) with high textural and thermal stability was obtained.FTIR,XRD,TEM,were used to characterize the structure of titanium alkoxides and nanocrystalline of TiO 2.The characteristics of nanocrystalline of TiO 2 was depended on the properties of titanium alkoxides.The Ti(OEt) 4 as a source of titanium yielded the best textural and thermal stability nanocrystalline of TiO 2.

Key words: Electrosynthesis, Titanium alkoxides, Nanocrystalline TiO 2, Sol_gel process

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