纳米管限域钌促进对氯硝基苯催化加氢  

Hydrogenation of p-chloronitrobenzene improved by Ru nanoparticles confined within nanotubes

作　　者：张亚斌 张明 Zhang Yabin;Zhang Ming(School of Chemistry and Chemical Engineering,Shanxi University,Taiyuan 030006, Shanxi,China)

机构地区：[1]山西大学化学化工学院,山西太原030006

出　　处：《工业催化》2020年第11期37-43,共7页Industrial Catalysis

基　　金：国家自然科学基金青年基金项目(21902093)。

摘　　要：以钛酸盐纳米管为载体,通过溶剂蒸发还原法制备了钛酸盐纳米管内限域Ru催化剂。通过TEM、N2吸附-脱附、XRD表征了钛酸盐纳米管及其制备的限域催化剂的微观结构。该催化剂具有明显的限域效应,使其在对氯硝基苯加氢反应中表现出远高于钛酸盐纳米管外表面负载Ru催化剂和商用TiO2负载Ru催化剂的反应活性(如在不同反应温度、氢压、底物浓度等条件下,限域催化剂催化活性和选择性均为最高)。此外,该纳米管限域催化剂也具有优良的循环再利用性能,在循环使用4次后,其催化活性降低程度远远小于外负载型催化剂。充分表明该限域催化剂具有广阔的应用前景。A confined catalyst was prepared by using titanate nanotubes as a support,in which Ru nanoparticles were confined within the cavities by solvent-evaporation reduction method.The microstructures of titanate nanotubes and confined catalyst were characterized by TEM,N2 adsorption-desorption and XRD.Due to confinement effect,the Ru confined catalyst showed much higher activity than those catalysts prepared by Ru was supported on the surface of titanate nanotubes and commercial TiO2(such as:the confined catalyst had the highest catalytic activity and selectivity under different reaction temperature,hydrogen pressure,substrate concentration and so on).In addition,the Ru confined catalyst also had excellent recyclability,and the reduction of catalytic activity was much less than those of the external supported catalysts when the catalyst was reused for 4 times.The above results show that the confined catalyst has broad application prospects.

关 键 词：催化化学 钛酸盐纳米管 限域效应 催化加氢 反应活性 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]