Journal of Sol-Gel Science and Technology, ( ISI ), No (51), Year (2009-4) , Pages (92-101)

Title : ( A study on the effect of synthesis parameters on the size of nickel particles in sol–gel derived Ni–SiO2–Al2O3 nanocomposites )

Authors: Ata Kamyabi-Gol , Seyed Mojtaba Zebarjad , Seyed Abdolkarim Sajjadi ,

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The present work deals with the synthesis of Ni–SiO2–Al2O3 nanocomposites fabricated by embedding nickel oxide particles, obtained from hexahydrated nickel nitrate [Ni(NO3)2 · 6H2O], in matrixes with different molar percents of Silica/Alumina, through sol–gel method based on hydrolysis and condensation of tetraethylorthosilicate (TEOS) and Aluminum Isopropoxide [Al(OC3H7)3] alkoxides. Due to the various factors, e.g., pH, EtOH/TEOS/H2O ratio, Si/Ni ratio etc., influencing the nickel grain size of the nanocomposites, Taguchi robust design method of system optimization was used to determine the percent of contribution (%ρ) of each factor. The nanocomposites were reduced in a flow of hydrogen and nitrogen gas at 700 °C for half an hour. The nickel grain size in the nanocomposites was determined by utilizing Scherrer`s method and XRD patterns. The smallest nickel grain size obtained from the Taguchi orthogonal array was about 24 nm, later confirmed by TEM observations. After optimization of the controlling factors, a nickel grain size of 15.4 nm was obtained. It was found that the SiO2/Al2O3 molar ratio of the matrix had the most influence on the nickel grain size (29.22%) and the Water/TEOS molar ratio stood in second place (21.44%). It was illustrated that the starting temperature of the aluminum isopropoxide had the least influence on the nickel grain size.

Keywords

, Nickel–alumina–silica nanocomposite , Sol–gel , Taguchi , Nickel particle size ,
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@article{paperid:1010811,
author = {Kamyabi-Gol, Ata and Zebarjad, Seyed Mojtaba and Sajjadi, Seyed Abdolkarim},
title = {A study on the effect of synthesis parameters on the size of nickel particles in sol–gel derived Ni–SiO2–Al2O3 nanocomposites},
journal = {Journal of Sol-Gel Science and Technology},
year = {2009},
number = {51},
month = {April},
issn = {0928-0707},
pages = {92--101},
numpages = {9},
keywords = {Nickel–alumina–silica nanocomposite - Sol–gel - Taguchi - Nickel particle size - TEM},
}

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%0 Journal Article
%T A study on the effect of synthesis parameters on the size of nickel particles in sol–gel derived Ni–SiO2–Al2O3 nanocomposites
%A Kamyabi-Gol, Ata
%A Zebarjad, Seyed Mojtaba
%A Sajjadi, Seyed Abdolkarim
%J Journal of Sol-Gel Science and Technology
%@ 0928-0707
%D 2009

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