结构稳定的 CuO/TiO2纳米管的功能化溶胶修饰法制备及其催化 CO 氧化性能研究  

Synthesis and Catalytic Performance for CO Oxidation of CuO Modified-TiO_2 Nanotubes with High Thermal Stability via Functionalized Sol Modification

作　　者：韩骐伟[1] 朱宝林[1] 田晶[1] 宋娟娟[1] 胡晓静[1] 石玉坤[1] 黄唯平[1] 

机构地区：[1]南开大学化学系,金属与分子基材料化学天津市重点实验室,天津300071

出　　处：《无机化学学报》2014年第3期573-578,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21071086;21301098);天津市自然科学基金青年项目(No.13JCQNJC02000);“111计划”(No.B12015);“国家大学生创新性实验计划”(No.111005510)资助项目

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。By using hydrogen titanate nanotubes as support and titanium sol containing copper（Ⅱ） acetate as modifying agent, CuO modified-TiO2 nanotubes （CuO/TiO2 NTs） 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）, N2 absorption-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/TiO2 NTs （nCu：nTi=1：5） calcined at 400 ℃ exhibit the best catalytic performance.

关 键 词：钛酸纳米管 CUO 功能化溶胶修饰法 CO氧化 催化活性 

分 类 号：O614.41[理学—无机化学] O614.121[理学—化学]