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作者采用配位转化方法,成功地制备了高分子/二氧化硅双重负载的纳米钯催化剂.运用光学显微镜、扫描电镜及透射电镜对催化体系的表面形态、纳米钯粒子的分布及粒径进行了测定.结果表明,通过配位转化方法制备的钯粒子与没有高分子保护的钯粒子相比,其在SiO2表面呈良好的球形,尺寸较为均一.高分子在SiO2表面的包覆层厚度、高分子配位基与金属钯离子的比例等对钯粒子的尺寸分布及粒径大小均有影响.通过红外光谱对纳米钯微粒制备过程中高分子配位基团的结构测定,推测了其制备过程的原理.
The author has successfully prepared the nano-palladium catalyst supported by macromolecule / silica by coordination transformation method.The surface morphology, distribution and size of nano-palladium particles were investigated by optical microscope, scanning electron microscope and transmission electron microscope The results showed that the Pd particles prepared by the coordination conversion method have a good spherical shape and a uniform size on the surface of SiO2 compared with the Pd particles without polymer protection.The coating thickness of the polymer on the SiO2 surface is high The size distribution of Pd particles and the size of the particles are influenced by the ratio of the ligands to the metal Pd ions, etc. The structure of the polymer coordination groups in the preparation of Pd nanoparticles was analyzed by FTIR, principle.