【摘要】 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。更多还原

【Abstract】 By using hydrogen titanate nanotubes as support and titanium sol containing copper(II) acetate as modifying agent, CuO modified-TiO2nanotubes(CuO/TiO2NTs) with high thermal stability were prepared by impregnation method. The prepared materials were characterized by means of X-ray diffraction(XRD), transmission electron microscopy(TEM), high-resolution transmission electron microscopy(HR-TEM), X-ray photoelectron spectroscopy(XPS), N2absorption-desorption(BET), and temperature programed desorption(TPD). The catalytic performances for CO oxidation of the obtained samples were evaluated. Obtained results show that not only is the copper component coated on the nanotubes, but also the thermal stability of the tubular support is improved after the impregnation process. The influences of support form, atomic ratio of Cu to Ti, and calcination temperature on the catalytic performance of the prepared catalysts were also investigated. Obtained results also indicate that the CuO/TiO2NTs(nCu∶nTi=1∶5) calcined at 400 ℃ exhibit the best catalytic performance.更多还原