SAPO-34分子筛载铜催化剂催化Ullmann偶联反应

以三乙胺为模板剂,通过水热合成法,改变不同硅铝比得到结晶度较好的SAPO-34分子筛.通过离子交换法和高压加氢的方法制得Cu-SAPO-34催化剂,并采用XRD、SEM、TEM、H2-TPR、XPS等方法对其结构进行了表征.结果表明,制备的催化剂形貌较规整,铜离子全部被还原为零价,还原后的铜纳米颗粒粒径较小且均匀分布在分子筛表面.将得到的Cu-SAPO-34催化剂应用于无配体情况下的沃尔曼偶联反应中,评价了其在Ullmann偶联反应中的催化性能,结果显示出Cu-SAPO-34在C—O键和C—N键的形成上展现了较高的催化活性.

SAPO-34 Supported Copper Nanoparticles Catalyzed Ullmann-type Coupling Reactions

SAPO-34 zeolite was synthesized by hydrothermal method with triethylamine as the template.Then the Cu-SAPO-34 catalyst was synthesized by ion exchange and high-pressure hydrogenation method.And the structure of the catalyst was characterized by XRD,SEM,TEM,H2-TPR,XPS and other methods.The results showed that the morphology of the prepared catalysts was more regular and all of the copper ions were reduced to Cu,and the copper nanoparticles were small and evenly distributed on the surface of the molecular sieve.The catalyst was used for Ullmann-type couplings under ligand-free conditions.The catalyst exhibited high catalytic activity in C—O and C—N bond formation couplings.