Carbon Microsphere-Supported Metallic Nickel Nanoparticles as Novel Heterogeneous Catalysts and Their Application for the Reduction of Nitrophenol

Molecules

Tibor Pasinszki¹  László Kótai²  István E. Sajó³  Melinda Krebsz⁴  Tamás Váczi⁵ 

[1] Department of Chemistry, School of Pure Sciences, College of Engineering, Science and Technology, Fiji National University, Samabula, Suva P.O. Box 3722, Fiji;Institute of Materials and Environmental Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, P.O. Box 286, 1519 Budapest, Hungary;János Szentágothai Research Centre, University of Pécs, Ifjúság u. 20, 7624 Pécs, Hungary;School of Chemistry, Monash University, Clayton, VIC 3800, Australia;Wigner Research Centre for Physics, Eötvös Loránd Research Network, Konkoly-Thege Miklós út 29-33, 1121 Budapest, Hungary;

关键词: Ni nanoparticles;    XRD;    SEM;    Raman;    carbon microsphere;    heterogeneous catalysis;   

DOI  :  10.3390/molecules26185680

来源: DOAJ

【 摘 要 】

Nickel nanoparticles are gaining increasing attention in catalysis due to their versatile catalytic action. A novel, low-cost and facile method was developed in this work to synthesize carbon microsphere-supported metallic nickel nanoparticles (Ni-NP/C) for heterogeneous catalysis. The synthesis was based on carbonizing a polystyrene-based cation exchange resin loaded with nickel ions at temperatures between 500 and 1000 °C. The decomposition of the nickel-organic framework resulted in both Ni-NP and carbon microsphere formation. The phase composition, morphology and surface area of these Ni-NP/C microspheres were characterized by powder X-ray diffraction, Raman spectroscopy, scanning electron microscopy and BET analysis. Elemental nickel was found to be the only metal containing phase; fcc-Ni coexisted with hcp-Ni at carbonization temperatures between 500 and 700 °C, and fcc-Ni was the only metallic phase at 800–1000 °C. Graphitization and carbon nanotube formation were observed at high temperatures. The catalytic activity of Ni-NP/C was tested in the reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride, and Ni-NP/C was proved to be an efficient catalyst in this reaction. The relatively easy and scalable synthetic method, as well as the easy separation and catalytic activity of Ni-NP/C, provide a viable alternative to existing nickel nanocatalysts in future applications.

【 授权许可】

Unknown