Title of article :
Synthesis, structure characterization and catalytic activity of nickel tungstate nanoparticles
Author/Authors :
Seied Mahdi Pourmortazavi، نويسنده , , Mehdi Rahimi-Nasrabadi، نويسنده , , Morteza Khalilian-Shalamzari، نويسنده , , Mir Mahdi Zahedi، نويسنده , , Seiedeh Somayyeh Hajimirsadeghi، نويسنده , , Ismail Omrani، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
8
From page :
745
To page :
752
Abstract :
Taguchi robust design was applied to optimize experimental parameters for controllable, simple and fast synthesis of nickel tungstate nanoparticles. NiWO4 nanoparticles were synthesized by precipitation reaction involving addition of nickel ion solution to the tungstate aqueous reagent and then formation of nickel tungstate nucleolus which are insoluble in aqueous media. Effects of various parameters such as nickel and tungstate concentrations, flow rate of reagent addition and reactor temperature on diameter of synthesized nickel tungstate nanoparticles were investigated experimentally by the aid of orthogonal array design. The results for analysis of variance (ANOVA) showed that particle size of nickel tungstate can be effectively tuned by controlling significant variables involving nickel and tungstate concentrations and flow rate; while, temperature of the reactor has a no considerable effect on the size of NiWO4 particles. The ANOVA results proposed the optimum conditions for synthesis of nickel tungstate nanoparticles via this technique. Also, under optimum condition nanoparticles of NiWO4 were prepared and their structure and chemical composition were characterized by means of EDAX, XRD, SEM, FT-IR spectroscopy, UV–vis spectroscopy, and photoluminescence. Finally, catalytic activity of the nanoparticles in a cycloaddition reaction was examined.
Keywords :
Nickel tungstate , Structure characterization , Precipitation synthesis , Catalytic activity , Statistical optimization , Nanoparticle
Journal title :
Applied Surface Science
Serial Year :
2012
Journal title :
Applied Surface Science
Record number :
1006166
Link To Document :
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