Palladium functionalized yolk-shell nanorattles with tunable surface wettability for controllable catalytic selectivity

Yang, XY (Yang, Xinyue)^{[ 1 ]} ; Sun, ZM (Sun, Zunming)^{[ 1 ]} ; Huang, XP (Huang, Xianpei)^{[ 1 ]} ; Zhang, MM (Zhang, Mengmeng)^{[ 1 ]} ; Bian, GM (Bian, Guomin)^{[ 2 ]} ; Qi, YL (Qi, Yonglin)^{[ 2 ]} ; Yang, XL (Yang, Xinlin)^{[ 1 ]}

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2020, 601, 文献号: 124728

DOI: 10.1016/j.colsurfa.2020.124728

摘要

Herein, we demonstrated a versatile method to synthesize tunable surface wettability nano-raffles with a removable palladium nanocluster and a hydrophilic/hydrophobic polymeric shell as a nanocatalyst for the hydrogenation of nitroaromatic compounds as model reactions. The yolk-shell nanocatalysts were prepared via combination of distillation precipitation polymerization of divinylbenzene and 4-chloromethylstyrene (CMSt) in presence of 3-(trimethoysilyl)rpopyl methacrylate (MPS)-modified Pd@SiO2 microspheres as seeds, surface-initiated atomic transferring radical polymerization (SI-ATRP) of acrylamide (Am) with Cu(I)Cl as a catalyst and Me6TREN as a ligand, and the subsequently selective removal of the sandwiched silica core. As a result, the rattle-type nano-colloids exhibited a remarkable catalytic selective performance for the hydrogenation of different hydrophobic and hydrophilic reactants due to presence of a cavity for storing and hydrophilic/hydrophobic polymeric shell for fast transporting reagents and products as well as the protective effect to prevent the coagulation of palladium in nano-raffles.