欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文) ›› 2001, Vol. 7 ›› Issue (2): 249-254. 

• 研究论文 • 上一篇    下一篇

高活性Ti基纳米TiO_2膜催化电极的制备

褚道葆,沈广霞,周幸福,顾家山,林昌健,林华水   

  1. 安徽师范大学有机化学研究所!安徽芜湖241000,安徽师范大学有机化学研究所!安徽芜湖241000,安徽师范大学有机化学研究所!安徽芜湖241000,安徽师范大学有机化学研究所!安徽芜湖241000,厦门大学材料科学系固体表面物理化学国家重点实验室!福建厦门361005,厦门大学材料科学系固体
  • 收稿日期:2001-05-28 修回日期:2001-05-28 出版日期:2001-05-28 发布日期:2001-05-28

Preparation of Ti-Based Nanocrystalline TiO_2 Film Electrode with High Activity

CHU Dao_bao 1,SHEN Guang_xia 1,ZHOU Xing_fu 1, LIN Chang_jian 2,LIN Hua_shui 2   

  1. (1. Inst.of Organ.Chem.,Anhui Normal Univ.,Wuhu 241000,China;2.Dept.of Mater.Sci., State Key Lab.for Phys.Chem.of Solid Surface,Xiamen Univ.Xiamen 361005,China
  • Received:2001-05-28 Revised:2001-05-28 Published:2001-05-28 Online:2001-05-28

摘要: 采用“牺牲阳极法”恒槽压电解含有 0 .0 0 5mol·L- 1四乙基溴化铵的乙醇溶液 ,加入微量乙酰丙酮作稳定剂 ,电合成TiO2 前驱体钛酸乙酯Ti(EtO) 4 ,经水解、涂膜、煅烧制备Ti基纳米TiO2 膜电极 (Ti/nano_TiO2 ) .TEM、SEM、XRD测试表明 :TiO2 颗粒尺寸在 10~ 35nm ,膜厚达 0 .5μm ,主要为锐钛矿晶型 ,膜为多孔三维网状结构 .循环伏安法研究了纳米TiO2 膜电极对草酸还原为乙醛酸、硝基苯还原为对氨基苯酚反应的电催化活性 ,结果发现纳米膜中的Ti(Ⅳ ) /Ti(Ⅲ )氧化还原电对起一种中介作用 ,可使有机物如草酸和硝基苯间接电还原 ,且电极催化活性高 ,性能稳定

关键词: 纳米TiO2膜电极, 电催化, 电合成, Sol_gel法

Abstract: The potentiostatic electrosynthesis of Ti(EtO) 4 was studied by anodic dissolution of metal titanium(TA1) in solution of 0.005 mol·L -1 (EtO) 4NBr in the ethanol (AR) in the presence negligible CH 3COCH 2COCH 3.The Ti_based nanocrystalline TiO 2 Film electrode (Ti/nano_TiO 2) was prepared by sol_gel method.By TEM,SEM and XRD,it has been shown that the anatase particle of TiO 2 was 10~35 nm in diameter and the film was 0.5 μm in thickness.The nanocrystalline film was composed of a three_diminsional network of interconnected particles.Reodx behavior and electrocatalytic activities of the Ti/nano_TiO 2 electrode were investigated by cyclic voltammetry (CV) from oxalic acid and nitrobenzene to glyoxalic acid and p_aminionphenol. The Ti(Ⅳ)/Ti(Ⅲ) redox system,as a medium,shows highly electrocatalytic activities and stable characteristic to indirect electroreduction of organic compounds(e.g.:oxalic acid and nitrobenzene).

Key words: Nanocrystalline TiO 2 film electrode, Electrocatalysis, Electrosynthesis, The Sol_gel method

中图分类号: