STUDY ON HIGHLY ALLOYED STEEL ANODE COATED BY MIXED METAL OXIDES SnO2 - Sb2O3 THIN FILM AND APPLICATION IN WASTEWATER TREATMENT

Huynh Thu Suong

Abstract


 In this study, thin film of mixed SnO2 and Sb2O3 on Cr18Ni12Ti high alloy steel (HAS) substrate (SnO2-Sb2O3/HAS) was fabricated by dip coating - pyrolysis method. The morphology and structure of the material surface was observed by scanning electron microscopy (SEM). The mechanical property was evaluated by using Vickers hardness test (HV test). The electrochemical properties of the formed film were investigated by open circuit potential measurement vs. time and potentiodynamic polarization curves in the 3.5% NaCl solution.

The results indicate that the SnO2-Sb2O3/HAS electrode has high hardness and good electrochemical strength. The SnO2-Sb2O3/HAS electrode was used as an anode to remove Rhodamine B (RhB) - a color dye - from wastewater.  The effect of electrolysis time on treatment efficiency for RhB is studied. The UV-Vis spectra and Total Organic Carbon (TOC) analysis shows that the RhB color dye are removed from wastewater via electrochemical oxidation process.


Keywords


high alloy steel, SnO2-Sb2O3/HAS electrode, Rhodamine B, degradation, electrochemical oxidation.

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DOI: https://doi.org/10.15625/2525-2518/55/5B/12219 Display counter: Abstract : 91 views. PDF : 46 views.

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Published by Vietnam Academy of Science and Technology