氨水挥发法制备氮掺杂TiO2纳米管及表征
Preparation and Characterization of N-Doped TiO2 Nanotubes with NH3·H2O Volatilization Process
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摘要: 采用阳极氧化法在纯钛片表面制备了TiO2纳米管, 在随后的热处理过程中通过浓氨水受热挥发提供的氨气氛下进行掺氮, 采用SEM、XRD、XPS对氮掺杂的TiO2纳米管进行了表征, 采用自制光催化污水处理装置研究了氮掺杂对TiO2纳米管光催化性能的影响。结果表明: 制得的TiO2纳米管管径为80～90 nm, 壁厚为5～10 nm;经400 ℃热处理后, 未掺杂、氮掺杂TiO2纳米管的晶型相同; 氮掺杂使TiO2纳米管的光催化性能提高了4.7%。Abstract: TiO2 nanotubes were prepared on the surface of pure titanium sheet by anodic oxidation method. N was doped with NH3, which engendered by the volatilization of NH3·H2O during heat treatment process. The characteristics of N-doped TiO2 nanotubes were investigated by SEM, XRD and XPS. The effect of N-doping on photocatalytic property of TiO2 nanotubes was studied with self-made photocatalytic sewage disposal device. The results indicate that the diameter of the prepared TiO2 nanotubes was 80-90 nm and the thickness of the wall was 5-10 nm. The crystal forms of undoped and N-doped TiO2 nanotubes annealed at 400 ℃ were the same. The photocatalytic property of TiO2 nanotubes improved 4.7% by N-doping.
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