Jump to main content
Jump to site search


Synthesis of Cobalt Ferrite Nanoparticles by Constant pH Co-precipitation and their High Catalytic Activity in CO Oxidation

Abstract

A series of cobalt ferrite samples were synthesized from metal nitrate solution at constant pH between 9 and 12 by the controlled co-precipitation method without any surfactant. Cobalt and iron nitrates and sodium hydroxide base were simultaneously dosed so that pH was precisely controlled during co-precipitation. The samples were characterized by PXRD, SEM, TEM, BET, and TPR. Careful analysis of typical PXRD peak profiles suggested the presence of two different variants of cobalt ferrite, nano-scale material giving rise to broad peak tails and more crystalline material leading to a sharper central profile. Rietveld refinement could quantify relative amount of both nano and crystalline fractions in these samples indicating that their relative abundance can be controlled by the co-precipitation pH. TEM analysis further proved the presence of both crystalline and nano crystalline region in the samples.The average crystallite size of the cobalt ferrite nanocrystallites was 4-5 nm.These samples exhibit high BET surface area, in the order of 200m2/g. The samples were tested for catalytic performance in CO oxidation reaction. The surface area, reduction behavior and catalytic performance of ferrites were dependent on the relative amount of both the crystalline and nanocrystalline phases

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Feb 2017, accepted on 08 Jun 2017 and first published on 08 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00558J
Citation: New J. Chem., 2017, Accepted Manuscript
  •   Request permissions

    Synthesis of Cobalt Ferrite Nanoparticles by Constant pH Co-precipitation and their High Catalytic Activity in CO Oxidation

    J. Thomas, N. Thomas, F. Girgsdies, M. Behrens, X. Huang, S. V. D. and V. Sebastain, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00558J

Search articles by author

Spotlight

Advertisements