TY - JOUR
T1 - Controlled synthesis of Fe3O4/ZIF-8 nanoparticles for magnetically separable nanocatalysts
AU - Pang, Fei
AU - He, Mingyuan
AU - Ge, Jianping
N1 - Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/4/27
Y1 - 2015/4/27
N2 - Fe3O4/ZIF-8 nanoparticles were synthesized through a room-temperature reaction between 2-methylimidazolate and zinc nitrate in the presence of Fe3O4 nanocrystals. The particle size, surface charge, and magnetic loading can be conveniently controlled by the dosage of Zn(NO3)2 and Fe3O4 nanocrystals. The as-prepared particles show both good thermal stability (stable to 550 °C) and large surface area (1174 m2g-1). The nanoparticles also have a superparamagnetic response, so that they can strongly respond to an external field during magnetic separation and disperse back into the solution after withdrawal of the magnetic field. For the Knoevenagel reaction, which is catalyzed by alkaline active sites on external surface of catalyst, small Fe3O4/ZIF-8 nanoparticles show a higher catalytic activity. At the same time, the nanocatalysts can be continuously used in multiple catalytic reactions through magnetic separation, activation, and redispersion with little loss of activity.
AB - Fe3O4/ZIF-8 nanoparticles were synthesized through a room-temperature reaction between 2-methylimidazolate and zinc nitrate in the presence of Fe3O4 nanocrystals. The particle size, surface charge, and magnetic loading can be conveniently controlled by the dosage of Zn(NO3)2 and Fe3O4 nanocrystals. The as-prepared particles show both good thermal stability (stable to 550 °C) and large surface area (1174 m2g-1). The nanoparticles also have a superparamagnetic response, so that they can strongly respond to an external field during magnetic separation and disperse back into the solution after withdrawal of the magnetic field. For the Knoevenagel reaction, which is catalyzed by alkaline active sites on external surface of catalyst, small Fe3O4/ZIF-8 nanoparticles show a higher catalytic activity. At the same time, the nanocatalysts can be continuously used in multiple catalytic reactions through magnetic separation, activation, and redispersion with little loss of activity.
KW - heterogeneous catalysis
KW - magnetic properties
KW - metal-organic frameworks
KW - nanoparticles
KW - synthesis design
UR - https://www.scopus.com/pages/publications/84927589196
U2 - 10.1002/chem.201405921
DO - 10.1002/chem.201405921
M3 - 文章
C2 - 25959852
AN - SCOPUS:84927589196
SN - 0947-6539
VL - 21
SP - 6879
EP - 6887
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 18
ER -