MS-NH2@Pd-MS纳米催化剂的制备及其在Suzuki反应中的应用OA
Synthesis of MS-NH2@Pd-MS Nano-catalyst and Its High Catalytic Performance in Suzuki Reaction
采用软模板法制备了孔径 4～7 nm的介孔二氧化硅球,经APTS修饰后,通过化学还原法将纳米钯颗粒负载于该介孔二氧化硅球.随后,在负载了纳米钯颗粒的介孔二氧化硅表面再次封装二氧化硅,经表面保护碱蚀刻后形成第二层介孔结构,外层壳体的孔径约为 12～15 nm.通过 XRD、SEM、TEM、XPS、ICP等仪器对其进行的形貌表征结果发现,Pd纳米颗粒在载体上分布均匀,其晶粒尺寸大约为 3～5 nm.此催化剂在Suzuki偶联反应中表现出极好的催化活性和官能团兼容性,收率在90%以上.在回收实验中,催化活性在6次回收后未见明显降低,显示出极好的稳定性和可回收性.
This paper reported a nano-palladium catalyst with double-layer mesoporous structure.The inner layer of mesoporous SiO2(MS)was prepared by soft-template method with a pore size of 4～7 nm.After modification with APTS,the nano palladium particles were loaded onto this layer to form MS-NH2@Pd.Subsequently,the silica was then encapsulated on the surface of MS-NH2@Pd,and a second mesoporous structure is formed by surface-protected base etching.The pore diameter of the outer shell is about 12～15 nm.The characterization of XRD,SEM,TEM,XPS showed that the size of Pd nanoparticles was about 3～5 nm which evenly distributed on the carrier.This catalyst showed excellent catalytic activity and functional group compatibility in the Suzuki coupling reaction,and there was no significantly reduction in catalytic activity after 6 times of recovery,which showing excellent stability.
戴维清;杨召;梁鹏飞;宋娟
南京邮电大学 材料科学与工程学院,江苏 南京 210023南京邮电大学 材料科学与工程学院,江苏 南京 210023||南京邮电大学 信息材料与纳米技术研究院,江苏 南京 210023南京邮电大学 信息材料与纳米技术研究院,江苏 南京 210023南京邮电大学 材料科学与工程学院,江苏 南京 210023||南京邮电大学 信息材料与纳米技术研究院,江苏 南京 210023
化学
介孔二氧化硅纳米PdSuzuki偶联反应非均相催化过渡金属催化
mesoporous silicanano-palladiumSuzuki coupling reactionheterogeneous catalysttransition-metal catalysis
《广州化学》 2024 (6)
53-59,7
南京邮电大学大学生创新训练计划项目南京邮电大学国自基金孵化项目(NY219058)
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