纳米NiO/碳纳米管复合催化剂的制备  

Preparation of Nano-NiO/CNTs Composite Catalyst

作　　者：刘建勋[1] 凌洁[2] 李凤生[1] 姜炜[1] 刘永[1] 

机构地区：[1]南京理工大学国家特种超细粉体工程技术研究中心,江苏南京210094 [2]内蒙古呼和浩特石化公司,内蒙古呼和浩特010070

出　　处：《石油化工》2007年第7期670-673,共4页Petrochemical Technology

基　　金：国家自然科学基金项目(50602024);中国人民解放军总装备部预研项目(41328030507)

摘　　要：以碳纳米管(CNTs)为载体,采用化学沉淀法制备了纳米NiO/CNTs复合催化剂;按正交设计进行实验,考察了搅拌转速、NaOH溶液浓度、NaOH溶液的滴加速率和反应温度对催化剂制备的影响,得到最佳的制备条件:搅拌转速150r/min、NaOH溶液浓度0.1mol/L、滴加速率5.0mL/min、反应温度40℃。对在最佳条件下制备的纳米NiO/CNTs复合催化剂进行了X射线衍射、透射电子显微镜、扫描电子显微镜、X射线能谱和BET比表面积分析。分析结果表明,纳米NiO/CNTs复合催化剂中纳米NiO结晶好、均匀沉积在CNTs载体上,由于CNTs的载体支撑作用,减少了纳米NiO的团聚,使其保持了较小的粒径,且增大了比表面积。Nano- NiO/CNTs composite catalyst was prepared from NaOH and NiC12 solutions with carbon nanotubes （CNTs） as support by chemical precipitation. Effects of stirring speed, NaOH concentration, dropping rate of NaOH solution and reaction temperature on particle size of the catalyst were studied by orthogonal experimental design. The optimal preparation conditions were obtained as follows： stirring speed 150 r/min, NaOH concentration 0.1 mol/L, dropping rate 5.0 mL/min and reaction temperature 40 ℃. The catalyst and support were characterized by means of XRD, TEM, SEM, XPS and BET. Nano - NiO in nano - NiO/CNTs composite catalyst crystallized perfectly and uniformly precipitated on CNTs support. Aggregation of nano - NiO particles was reduced due to supporting of CNTs. So small particles with larger specific surface area were achieved.

关 键 词：纳米氧化镍 碳纳米管 复合催化剂 正交设计 

分 类 号：TQ426[化学工程]