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Sains
Malaysiana 41(4)(2012): 465-470
Surface Morphology and Crystallinity of
Metal Oxides in Nickel-Cobalt Binary System
(Morfologi
Permukaan dan Kehabluran Oksida Logam dalam Sistem Biner Nikel-Kobalt)
Sook-Keng
Chang, Zulkarnain Zainal*, Kar-Ban Tan & Nor Azah Yusof
Department
of Chemistry, Faculty of Science, Universiti Putra Malaysia
43400
UPM Serdang, Selangor D.E., Malaysia
Advanced Materials and Nanotechnology Laboratory
Wan
Mohamad Daud Wan Yusoff
Department
Of Physics, Faculty Of Science, Universiti Putra Malaysia
43400
UPM Serdang, Selangor D.E., Malaysia
S.R.S.
Prabaharan
Department
of Electrical and Electronics Engineering, Faculty of Engineering
The
University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih,
Selangor.
D.E., Malaysia
Received:
5 August 2011 / Accepted: 9 November 2011
ABSTRACT
The
effect of composition on nickel cobaltites prepared by co-precipitation was
investigated. Various compositions were synthesised under different heat
treatment conditions. The formation mechanism, lattice parameter and
crystallite size were determined by various techniques. X-ray diffraction (XRD)
analysis revealed that the optimum condition for the formation of single phase
nickel-cobalt oxide (NiCo2O4) can be obtained from solution containing Ni: Co
ratio of 33.3 mol%: 66.7 mol% with heat treatment at 400°C. The presence of
pure phase NiCo2O4 with the particle size of approximately 34.10
Keywords:
Composition; co-precipitation; nanosized; nickel-cobalt oxide; phase formation
ABSTRAK
Kesan
komposisi ke atas nikel kobaltit yang disediakan melalui ko-pemendakan telah
dikaji. Pelbagai komposisi telah disintesis pada keadaan pemanasan yang
berlainan. Mekanisme pembentukan, parameter kekisi dan saiz hablur telah ditentukan
dengan pelbagai teknik. Berdasarkan analisis pembelauan sinar-X (XRD), keadaan
optimum pembentukan fasa tunggal nikel-kobalt oksida (NiCo2O4)
boleh diperoleh daripada larutan yang mengandungi Ni: Co pada nisbah 33.3 mol%:
66.7 mol% pada suhu pemanasan 400°C. Kehadiran fasa tulen NiCo2O4 dengan saiz zarah lebih kurang 34.10 nm dapat diperhatikan melalui mikroskop
elektron imbasan pancaran medan (FESEM). Kehabluran oksida yang
disintesis
meningkat dengan penambahan kandungan Ni.
Kata
kunci: Komposisi; ko-pemendakan; pembentukan fasa; nikel-kobalt oksida; saiz
nano
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*Corresponding
author; email: zulkar@science.upm.edu.my
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