杨恒权教授课题组与澳大利亚Max Lu教授课题组合作在Advanced Functional Materials上(影响因子10.179)发表研究论文
杨恒权教授课题组与澳大利亚Max Lu教授课题组合作在Advanced Functional Materials上(影响因子10.179)发表研究论文
Jian Liu, Hengquan Yang (杨恒权), Freddy Kleitz, Zhi Gang Chen, Tianyu Yang, Ekaterina Strounina, Gao Qing (Max) Lu,* and Shi Zhang Qiao
Adv. Funct. Mater. 2012, 22, 591–599
This contribution describes the preparation of multifunctional yolk–shell nanoparticles (YSNs) consisting of a core of silica spheres and an outer shell based on periodic mesoporous organosilica (PMO) with perpendicu-larly aligned mesoporous channels. The new yolk–shell hybrid materials were synthesised through a dual mesophase and vesicle soft templating method. The mesostructure of the shell, the dimension of the hollow space (4∼52 nm), and the shell thickness (16∼34 nm) could be adjusted by precise tuning of the synthesis parameters, as evidenced by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen sorption investigations. Various metal nanoparticles (e.g., Au, Pt, and Pd) were encapsulated and confined in the void space between the core and the shell using impregnation and reduction of adequate metal precursors. The selective oxidation of various alcohol sub-strates was then carried out to illustrate the benefits of such an architecture in catalysis. High conversion (∼100%) and excellent selectivity (∼99%) were obtained over Pd nanoparticles encapsulated in the hybrid PMO yolk–shell structures.
