ZnO nanoparticles supported on reduced graphene oxide (ZnO/RGO) were prepared by the hydrothermal method and characterized by TEM, XPS, XRD, and Raman spectroscopy. As a green catalyst, ZnO/RGO was applied to the Claisen-Schmidt condensation reaction of aryl aldehydes and aryl ketones under microwave irradiation. Therein, chalcone products could be efficiently synthesized and easily separated from the heterogeneous catalysis system. The catalyst could be recycled four times without significant loss of catalytic activity.

中文翻译：

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石墨烯负载的ZnO纳米颗粒：无需额外碱即可用于Claisen-Schmidt缩合反应的高效多相催化剂

通过水热法制备了负载在还原氧化石墨烯上的ZnO纳米颗粒（ZnO / RGO），并通过TEM，XPS，XRD和拉曼光谱进行了表征。ZnO / RGO作为绿色催化剂，在微波辐射下用于芳基醛和芳基酮的Claisen-Schmidt缩合反应。其中，查耳酮产物可以被有效地合成并且易于与非均相催化体系分离。催化剂可以循环使用四次而不会显着降低催化活性。