title: In situ loading of gold nanoparticles on Fe3O4@SiO2 magnetic nanocomposites and their high catalytic activity.
abstract: In this work, a facile approach was successfully developed for in situ catalyzing Au nanoparticles loaded on Fe3O4@SiO2 magnetic nanospheres via Sn(2+) linkage and reduction. After the Fe3O4@SiO2 MNPs were first prepared via a sol-gel process, only one step was needed to synthesize the Fe3O4@SiO2-Au magnetic nanocomposites (Fe3O4@SiO2-Au MNCs), so that both the synthesis step and the reaction cost were remarkably decreased. Significantly, the as-synthesized Fe3O4@SiO2-Au MNCs showed high performance in the catalytic reduction of 4-nitrophenol to 4-aminophenol and could be reused for several cycles with convenient magnetic separability. This approach provided a useful platform based on Fe3O4@SiO2 MNPs for the fabrication of Au or other noble metal magnetic nanocatalysts, which would be very useful in various catalytic reductions.
authors.affiliation: State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000, China.
authors.forename: Jinmin
authors.initials: J
authors.lastname: Zheng
authors.forename: Yalei
authors.initials: Y
authors.lastname: Dong
authors.forename: Weifeng
authors.initials: W
authors.lastname: Wang
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Ma
authors.forename: Jing
authors.initials: J
authors.lastname: Hu
authors.forename: Xiaojiao
authors.initials: X
authors.lastname: Chen
authors.forename: Xingguo
authors.initials: X
authors.lastname: Chen
mesh_terms: D000627:Aminophenols / Q000737:chemistry; D002384:Catalysis; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008280:Magnetics; D053768:Metal Nanoparticles / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D009596:Nitrophenols / Q000737:chemistry; D010084:Oxidation-Reduction; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D000627:Aminophenols; D009596:Nitrophenols; D006046:Gold; D012822:Silicon Dioxide; C026729:4-aminophenol; D052203:Ferrosoferric Oxide; C024836:4-nitrophenol