ZnO一维纳米结构修饰的微反应器的构建及其催化性能研究

Fabrication of ZnO One-dimensional Nanostructure Modified Microreactor and Its Catalytic Performance Research

采用湿化学的方法将ZnO一维纳米结构定向生长于石英毛细管微通道反应器内壁,并通过将Pd溶胶直接包覆于ZnO一维纳米结构表面的方法,制备得到Pd/ZnO一维纳米结构修饰的微反应器。采用FE-SEM、XRD、EDX、TEM等测试方法对Pd/ZnO一维纳米结构的形貌结构进行表征,结果表明Pd/ZnO一维纳米结构形貌规整均一,厚度约2～3μm,Pd均匀的包覆在ZnO纳米棒表面;Pd为立方相单质。利用该微反应器进行催化Heck偶联反应,在反应时间为40 min时其产率达到100%,而在烧瓶内进行却至少需要120 min,因此,该反应器具有快速高效的催化效果。

Pd/ZnO one-dimensional nanostructure modified microreactor was successfully fabricated simply by pumping a Pd sol into the microchannel containing preformed ZnO one-dimensional nanostructure,which was constructed through a wet chemical route.The morphology and structure of Pd/ZnO one-dimensional nanostructure were characterized through FE-SEM,XRD,EDX,TEM et al.The results showed that the Pd/ZnO one-dimensional nanostructure were uniform and their thickness was about 2-3 μm.The microreactor was used for catalysing Heck coupling reaction.The result showed that it just cost 40 min when the yield reached 100% by using the microreactor,while,it would cost more than 120 min in a flask.Thus,the Pd/ZnO one-dimensional nanostructure modified microreactor was a microreactor with the fast and high efficient catalytic performance.