title: Magnetic recyclable Ag catalysts with a hierarchical nanostructure.
abstract: This study reports the fabrication of a novel hierarchically structured nanocatalyst system possessing a well-defined nickel silicate (NS) protected Fe(3)O(4) core and a layer of uniform Ag nanoparticles on the NS shell by using a multi-step approach. The multifunctional microparticles show high performance in the reduction of 4-nitrophenol and the rate of the catalytic reaction can be controlled by changing the concentration of nanocatalysts. In particular, there was no visible decrease in the catalytic activity of the reused catalysts even after being recycled five times. Thus the hierarchically structured Fe(3)O(4)@NS particles are very suitable as a catalyst support for catalyst separation and redispersion.
authors.affiliation: Department of Chemistry, University of Science and Technology of China (USTC), Hefei 230026, People's Republic of China.
authors.forename: Xueping
authors.initials: X
authors.lastname: Zhang
authors.forename: Wanquan
authors.initials: W
authors.lastname: Jiang
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Zhou
authors.forename: Shouhu
authors.initials: S
authors.lastname: Xuan
authors.forename: Chao
authors.initials: C
authors.lastname: Peng
authors.forename: Luhang
authors.initials: L
authors.lastname: Zong
authors.forename: Xinglong
authors.initials: X
authors.lastname: Gong