Preparation of NiO nanoparticles from Ni（OH）2·NiCO3·4H2O precursor by mechanical activation
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第7期
论文作者：Kolsoom Ahmadisoltansaraei Javad Moghaddam
文章页码：726 - 735
摘 要：A mechanical activation process was introduced as a facile method for producing nickel oxide nanopowders.The precursor compound Ni（OH）2·NiCO3·4H2O was synthesized by chemical precipitation.The precursor was milled with NaCl diluent.A high-energy ball milling process led to decomposition of the precursor and subsequent dispersal in NaCl media.Nickel oxide nanocrystalline powders were produced by subsequent heat treatment and water washing.Milling rotation speed,milling time,ball-to-powder ratio（BPR）,and nickel chloride-to-precursor ratio were introduced as influential parameters on the wavelength of maximum absorption(λmax).The effects of these parameters were investigated by the Taguchi method.The optimum conditions for this study were a milling rotation speed of 150 r/min,a milling time of 20 h,a BPR of 15/1,and a NaCl-to-powder weight ratio（NPR） of 6/1.In these conditions,λmax was predicted to be 292 nm.The structural properties of the samples were determined by field emission scanning electron microscopy,X-ray diffraction,and energy dispersive spectrometry.
Kolsoom Ahmadisoltansaraei，Javad Moghaddam
Materials and Metallurgical Engineering Department,Advanced Materials Research Center,Sahand University of Technology
摘 要：A mechanical activation process was introduced as a facile method for producing nickel oxide nanopowders.The precursor compound Ni（OH）2·NiCO3·4H2O was synthesized by chemical precipitation.The precursor was milled with NaCl diluent.A high-energy ball milling process led to decomposition of the precursor and subsequent dispersal in NaCl media.Nickel oxide nanocrystalline powders were produced by subsequent heat treatment and water washing.Milling rotation speed,milling time,ball-to-powder ratio（BPR）,and nickel chloride-to-precursor ratio were introduced as influential parameters on the wavelength of maximum absorption(λmax).The effects of these parameters were investigated by the Taguchi method.The optimum conditions for this study were a milling rotation speed of 150 r/min,a milling time of 20 h,a BPR of 15/1,and a NaCl-to-powder weight ratio（NPR） of 6/1.In these conditions,λmax was predicted to be 292 nm.The structural properties of the samples were determined by field emission scanning electron microscopy,X-ray diffraction,and energy dispersive spectrometry.
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