Author(s) Chopade, S.C.; Kore, I.G.; Patil, S.P.; Jadhav, N.D.; Srinidhi, C.; Desai, P.A.
Journal Ceramics International
Date Published 04/2018
Abstract NiO3+δ and Ni1−xCuxO3+δ (x = 5, 10, 20) were synthesized by solid state precipitation method, using precursors, nickel chloride and copper chloride with potassium hydroxide as an alkalizing agent. The present work reports the synthesis of copper doped nickel oxides. The phase formation, crystallinity index, crystal structure and microstructure with composition analysis were investigated with the help of various characterization techniques. The FTIR spectrum reveals that characteristic metal oxygen bands of the Ni–O stretching at 447 cm−1 with crystallinity index 0.39. Phase pure, hexagonal NiO3+δ formation was identified from the XRD data. Nanosized particles with size as small as ~ 6 to 15 nm for pure sample and ~ 11 to 50 nm for the copper doped sample are observed from field emission scanning electron micrographs. Thermo chemical calculations such as enthalpy of reaction 77.44 kJ mole−1, Gibbs free energy − 639.23 kJ mole−1 and entropy of the reaction 0.0024 kJ K−1 mole−1 have been calculated. Specific surface area of NiO3+δ and Ni1−xCuxO3+δ (x = 5, 10, 20) is obtained by Sauter formula, i.e. ~ 292 m2/g, ~ 656 2/g, ~ 557 m2/g, and ~ 517 2/g respectively.
DOI 10.1016/j.ceramint.2017.12.209
ISSN 0272-8842
Citation Ceramics International. 2018;44(5):56215628.

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