(南京航空航天大學(xué) 納米材料研究所， 南京 210016)
摘 要: 以硫酸為電解液， 純鈦(TA1)為陽極， 銅片為陰極， 以恒壓和恒流陽極氧化方式在鈦表面直接獲得銳鈦型和金紅石型TiO2多孔膜。 采用X射線衍射儀對覆在鈦基體上的陽極氧化膜進行了結(jié)構(gòu)分析， 研究了電壓、 硫酸濃度、 陽極氧化時間和電流密度對TiO2多孔膜晶型的影響， 并討論了其形成機理。 結(jié)果表明： 在0.5 mol/L硫酸溶液中， 恒壓(≥80 V)或恒流(≥0.6 A)時出現(xiàn)銳鈦相TiO2; 恒壓(≥100 V)1 min時即可出現(xiàn)銳鈦相TiO2； 恒壓(≥150 V)或恒流(≥0.8 A)時出現(xiàn)金紅石相TiO2。
關(guān)鍵字: 陽極氧化； TiO2多孔膜； 銳鈦型； 金紅石型
（ Research Institute of Nano-Materials, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China）
Abstract: The anatase and rutile TiO2 porous films were prepared directly on the surface of pure titanium by constant voltage and constant current anodic oxidation using sulphuric acid, pure titanium and pure copper as electrolyte, anode and cathode, respectively. The structure of the porous films on the substrate was analyzed by XRD. The effects of the voltage, the concentration of sulphuric acid, the anodization time and the current density on the crystalline phase of TiO2 porous films were systematically investigated, and the forming mechanism was discussed. The results show that, in 0.5 mol/L sulphuric acid electrolyte, the annatase TiO2 appears at constant voltage (≥80 V) or constant current (≥0.6 A) and appears immediately after 1 min anodization at constant voltage (≥100 V), while the rutile TiO2 appears at constant voltage (≥150 V) or constant current (≥0.8 A).
Key words: anodic oxidation; TiO2 porous film; anatase; rutile
