Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 636, Issue -, Pages 288-292Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.02.189
Keywords
Zinc oxide; Electrochemical method; Optimization; Specific energy consumption; Taguchi methodology
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In this study, zinc oxide nanoparticles were synthesized using electrochemical method. Zinc was used as electrode whereas oxalic acid in aqueous solution was used as an electrolyte. A L-9 (3(4)) Taguchi optimization methodology was used to find out the individual and interactive effect of all four independent experimental parameters namely pH (pH(o)): 5-8, oxalic acid concentration (m): 0.05-0.15 M, conductivity (k): 20-30 (mS/cm) and operating voltage (V-o): 5-8 V. These experimental parameters were optimized so as to maximize the productivity (g) and correspondingly find out specific energy consumption (kW h/kg) and specific electrode consumption (kg/kg). At the optimum condition of pH(o) = 5, m = 0.05 M, k = 30 (mS/cm) and V-o = 8 V, values of productivity, SENC and SELC were found to be 1.03 g, 3.79 kW h/kg and 1.76 kg/kg, respectively. Nanoparticles synthesized at optimum conditions have been further characterized by scanning electron microscopy, X-ray diffraction and UV-Visible diffuse reflectance spectroscopy techniques so as to confirm its ZnO nature. (C) 2015 Elsevier B.V. All rights reserved.
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