微流控芯片中TiO2薄膜的低温制备

在玻璃微流控芯片中,在低温条件下以溶胶凝胶法及水热处理法制备TiO2薄膜.考察了溶胶处理方式、水热流速、水热时间等因素对纳米TiO2薄膜的稳定性影响,考察了涂层次数、元素掺杂等因素对微流控芯片的光催化性能的影响.实验结果表明:100 μL/h流速下水热3 h获得的5层纳米TiO2薄膜芯片光催化降解亚甲基蓝,降解率可达到42.9％,且具有较高的稳定性.掺杂Si可以明显提高TiO2薄膜的光催化性能,亚甲基蓝降解率可达97.1％.

Low Temperature Preparation of Titanium Dioxide Thin Films in Microfluidic Chip

Nano-TiO2 thin film was prepared in a microfluidic chip by sol-gel method at low temperature followed by hydrothermal treatment.The influence of hydrothermal conditions such as treatment of the sol-gel,flow rate of hot water,hydrothermal treating time on the photocatalysis performance and stability of the TiO2 films in microfluidic chip were investigated.And the effects of thickness of the TiO2 films and doping of elements on the photocatalytic degradation efficiency were studied.When the TiO2 film was treated under the hydrothermal treatment condition of flow rate 100 μL/h for 3 h,the degradation rate of Methylene Blue trihydrate in the 5 layer coated microfluidic chip reaches to 42.9％.The TiO2 film has good stability in its photocatalytic efficiency.The photocatalytic efficiency of the TiO2 film is improved greatly when Si is doped into the TiO2 sol-gel film,which make the degradation rate of the methylene blue reaches up high to 97.1％.