Volume No. 8 Issue No.: 2 Page No.: 224-235 Oct-Dec 2013

 

EFFECTS OF PREPARATION METHODS ON Ti/NiORuO2- SnO2-Sb2O5 ANODE FOR REMOVAL OF REACTIVE BLACK-5 DYE

 

Soni B. D. and Ruparelia J. P.*

Department of Chemical Engineering, Institute of Technology, Nirma University,
Ahmedabad (INDIA)

 

Received on : July 10, 2013

 

ABSTRACT

 

The present paper focuses on comparison of mixed metal oxide coated electrodes Ti/NiORuO2- SnO2-Sb2O5 fabricated indigenously using Standard Thermal Decomposition (STD) and Polymeric Precursor Thermal Decomposition (PPTD) methods towards the elimination of dye compound. Electrodes synthesized by both the methods were tested for degradation of 100 mg/L synthetic RB-5 solution at pH 2 and constant current density 50mA/cm. The performance of electrodes for electrochemical oxidation of Reactive Black-5 dye (RB-5) was measured for colour, COD and TOC reduction. It was observed that decolourization and mineralization was best achieved by an electrode fabricated with PPTD. This was also supported by kinetic rate constant obtained through the studies. At the same time, effects of preparation method on the instant current efficiency and energy consumption were also calculated. Although PPTD proved efficient for RB-5 removal, during service life measurement, electrode coated by PPTD deactivated after 72 hr of electrolysis compared to 475 hr of electrode prepared by STD. The prepared electrodes were further characterized using SEM, EDX and XRD for surface morphology, thin film composition and coating microstructure respectively.

 

Keywords : Nickel, Polymeric precursor thermal decomposition (PPTD), Standard Thermal Decomposition (STD), Service life, Reactive Black-5 dye

 

 

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