All Chemicals Were Of Analytical Grade

1186 WordsMar 17, 20175 Pages
All chemicals were of analytical grade. Electrolytic zinc powders were produced by electrolysis of alkaline solutions containing zinc oxide. These solutions were prepared by dissolving a given amount of ZnO in 6 mol L-1 NaOH. After complete dissolution, solutions were stored in 500 ml volumetric flasks. Removing of water from the prepared zinc powder was performed using analytical grade ethanol and acetone mixture. 2.2 Electrolytic cell The electrochemical cell consists of a 0.5 L Pyrex beaker provided with polytetraflouroethylene (PTFE) cover. A magnesium cathode (2 cm width× 13 cm long) and a stainless steel (316-AISL) anode with the same dimensions were used. The active surface area of the cathode was 10 cm2. The back face of the…show more content…
The energy consumption was calculated using the following formula [23]: EC=(2.778×〖10〗^(-4) EIt)/m_exp (3) Where EC is the energy consumption (kWh kg−1) and E is the cell potential in volts. 2.3 Characterization of zinc powder The prepared zinc powder was analyzed using X-ray diffraction (CuKα radiation as the X-ray source, λ= 1.54056 ̊A). Granularity cumulation distribution chart of zinc powder was obtained using Atomic force microscopy (AFM) SPM-AA3000 (Angestrom Advanced Inc., USA) in contact mode. The AFM images were recorded over a scan area (2 µm x 2 µm). The SEM micrographs were obtained using scanning electron microscope (FEI Company –Holland). The apparent density (da) of zinc powder was measured by the standard pycnometric method, and calculated based on the following formula: [24] d_a=(d_w (w_3-w_1))/((w_2-w_1 )-(w_4-w_3 )
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