Degradation of Tannic Acid Using Tio2 Nanotubes as Electrocatalyst

Lakshmi Kruthika, N and Bhaskar Raju, G and Prabhakar, S (2013) Degradation of Tannic Acid Using Tio2 Nanotubes as Electrocatalyst. International Journal of Nanoscience (ijn) . pp. 481023-481031.

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Structured TiO2 nanotubes were grown on 2mm thick titanium sheet by anodization of titanium in ethylene glycol medium containing 0.025M NaF. The morphology of TiO2 nanotubes (TNT) was characterized using field emission scanning electron microscope. The potential of TNT as anode and also as photocatalyst for the degradation of tannic acid was studied. The mineralization of tannic acid was measured in terms Total Organic Carbon (TOC). Only 50% of TOC could be removed by exposing the tannic acid solution to UV-radiation (photolysis), whereas it was improved to 70% by electrooxidation (EO) using TNT as anode. Maximum degradation of 83% was achieved when electrooxidation was conducted under the influence of UVradiation (photoelectrocatalytic process (PEC)). Among the electrolytes tried, Na2SO4 was observed to be very effective for the degradation of tannic acid. The kinetics of tannic acid degradation by photoelectrocatalytic process was found to follow zero-order rate expression.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Degradation, Titanium nanotubes, tannic acid, Electrooxidation, photo oxidation, Electrocatalytic oxidation
Divisions:NML Chennai
ID Code:6796
Deposited By:Dr. G Bhaskar Raju
Deposited On:30 Dec 2013 11:08
Last Modified:18 Jun 2018 11:45
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