论文部分内容阅读
以水热处理方法得到的钛酸纳米管为载体,采用含有醋酸铜的功能化钛溶胶对其进行一步浸渍修饰,制备结构稳定的CuO修饰TiO2纳米管催化剂(CuO/TiO2NTs)。通过XRD(X-射线衍射)、TEM(透射电子显微镜)、HR-TEM(高倍透射电子显微镜)、XPS(X-射线光电子能谱)、BET(氮气吸附-脱附法)、TPD(程序升温脱附法)等表征材料的结构和性质,并研究其催化CO氧化的性能。研究表明:经过溶胶浸渍处理过程,不仅将功能化铜组分负载在纳米管上,而且纳米管载体的耐热性能明显提高;催化剂载体、铜钛原子比及焙烧温度对催化剂的活性有明显影响,且400℃焙烧的Cu/Ti原子比为1∶5的CuO/TiO2NTs的活性最高。
The titanic acid nanotubes obtained by hydrothermal treatment were used as supports, and the CuO modified TiO2 nanotubes catalysts (CuO / TiO2NTs) with stable structure were prepared by one-step impregnation modification using functionalized titania sol containing copper acetate. The crystal structure was characterized by X-ray diffraction (XRD), TEM (Transmission Electron Microscopy), HR-TEM (Transmission Electron Microscopy), XPS (X-ray Photoelectron Spectroscopy), BET (Nitrogen Adsorption-Desorption), TPD Desorption method) and other characterization of the structure and properties of materials, and study its catalytic CO oxidation performance. The results show that not only the functionalized copper component is supported on the nanotubes, but also the heat resistance of the nanotube supports is obviously improved after the sol-dipping process. The catalyst supports, copper-titanium atomic ratio and calcination temperature significantly affect the activity of the catalyst , And CuO / TiO2NTs with Cu / Ti atomic ratio of 1: 5 calcined at 400 ℃ have the highest activity.