电化学溶解钛金属直接水解法制备纳米TiO_2  

Electrochemical Dissolution of Pure Titanium and Direct Hydrolysis for Preparation of Nanocrystalline TiO_2

作　　者：周幸福[1] 褚道葆[1] 韩爱杰[1] 顾家山[1] 林昌健[2] 田中群[2] 谭建光[2] 

机构地区：[1]安徽师范大学化学与材料科学学院,芜湖241000 [2]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

出　　处：《物理化学学报》2001年第4期367-371,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金!(29873039);安徽省自然科学基金;安徽教委基金!(99jl0075)资助项目

摘　　要：Metallic titanium was electrochemically dissoluted in absolute ethanol in the presence of Et4N· Br(as electro conductive additive),The electrolyte solution was then directly hydrolysized to obtain nanocrystalline TiO2.The powder obtained was calcined at 720℃ for 1 h.FT IR,Raman spectra,XRD and TEM were used to investigate the structure and particle size of the powder.Studies showed that the nanocrystalline TiO2 prepared by this method was of monocline structure with high textural stability and narrow size distribution of 10－ 20 nm,and its Raman spectra showed a shift of about 25 cm－ 1.The experiments also showed that the product yield could be improved by controlling the temperature under 50－ 60℃ ,selecting R4N· Br as conductive additive and preventing titanium anode from being passivated.The electrochemical dissolution of metal anode may be recommanded as a promising technique for the synthesis of nanomaterials.Metallic titanium was electrochemically dissoluted in absolute ethanol in the presence of Et4N . Br (as electro-conductive additive). The electrolyte solution was then directly hydrolysized to obtain nanocrystalline TiO2. The powder obtained was calcined at 720 degreesC for 1 h. FT-IR, Raman spectra, XRD and TEM were used to investigate the structure and particle size of the powder. Studies showed that the nanocrystalline TiO2 prepared by this method was of monocline structure with high textural stability and narrow size distribution of 10 - 20 nm, and its Raman spectra showed a shift of about 25 cm(-1). The experiments also showed that the product yield could be improved by controlling the temperature under 50 - 60 degreesC, selecting R4N . Br as conductive additive and preventing titanium anode from being passivated. The electrochemical dissolution of metal anode may be recommanded as a promising technique for the synthesis of nanomaterials.

关 键 词：钛阳极 二氧化钛纳米材料 钛配乙酯 水解 拉曼光谱 电化学溶解 恒电位电解 

分 类 号：O614[理学—无机化学]