Double-shelled hollow polymer microspheres as acid and metallic colloid bi-functional catalyst for a deactalization-hydrogenation tandem reaction
作者:
Fu, XF (Fu, Xiongfeng) [1] ; Du, Y (Du, Ying) [1] ; Liu, FY (Liu, Fuyao) [1] ; Yang, JZ (Yang, Jingzijun) [1] ; He, RY (He, Runyu) [1] ; Fu, GQ (Fu, Guoqi) [1] ; Yang, XL (Yang, Xinlin) [1] , [2]
文献号
130833
DOI
10.1016/j.colsurfa.2022.130833
出版时间
FEB 20 2023
在线发表
DEC 2022
已索引
2023-07-11
文献类型
Article
摘要
The double-shelled hollow polymer microspheres with a carboxylic acid in the inner shell and palladium metallic nanocolloids in the outer shell were prepared as a bi-functional catalyst for a tandem reaction including deacetalization on-hydrogenation from benzaldehyde dimethyl acetate to benzyl alcohol. The double-shelled hollow poly(ethyleneglycol dimethacrylate-co-acrylic acid) (PAA) and poly(ethyleneglycol dimethacrylate-co- N-vinyl pyrrolidone) (PNVP) microspheres were synthesized by a two-stage refluxing precipitation copolymer-ization in presence of 3-(trimethoxysilyl) propyl methacrylate (MPS)-modified silica as seeds to get SiO2/Pt-BA/ SiO2/PNVP tetra-layer microspheres with the subsequent hydrolysis of t-butyl ester to acid group and selective removal of the silica inner core and the sandwiched third layer. The palladium nano-colloids in outer-shell were prepared by the in-situ ethanol reduction of Pd(II) after the coordination of palladium acetate with N-pyrrolidone (NVP) groups in presence of SiO2/Pt-BA/SiO2/PNVP tetra-layer microspheres as stabilizers.
