Structural, Electrical and Magnetic Properties of Ni Doped Co-Zn Nanoferrites and their Application in Photo-Catalytic Degradation of Methyl Orange Dye

Abstract:

Nickel substituted cobalt zinc nanoferrites (Co_0.6Zn_0.4Ni_xFe_2-xO₄, x=0.2, 0.4, 0.6, 0.8 and 1.0) were successfully synthesised by sol gel method. FT-IR studies showed two absorption bands in the range of 400-600 cm^-1 corresponding to the M-O bond in the tetrahedral and octahedral clusters, respectively. Powder X-ray diffraction patterns revealed that all the samples had cubic structure with Fd-3m space group.The lattice constant was observed to increase with increase in nickel substitution, thus altering the unit cell volume. An examination of the magnetic properties revealed an increase in saturation magnetization with increasing Ni concentration upto x=0.4, and a decrease there after.These results could be explained using Neel's collinear two-sub-lattice model and three sub-lattice non-collinear model suggested by Yafet and Kittel. DC resistivity was found to decrease with increase in temperature due to semiconductor nature of nanoferrites. The catalytic activity was found to be maximum at x = 0.2 and further found to decrease with increase in nickel concentration

• Periodical: Solid State Phenomena (Volume 232)
• Pages: 197-211
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.232.197
• Online since: June 2015
• Authors: Santosh Bhukal, Sandeep Bansal, Sonal Singhal
• Keywords: Electrical Properties, Magnetic Properties, Photo-Catalytic Activity, Powder X-Ray Diffraction

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