Electrochemical detection and photochemical detoxification of hexavalent chromium (Cr(vi)) by Ag doped TiO2 nanoparticles

• Main Authors: Ravishankar, T. N, Muralikrishna, S, Suresh kumar, K, Nagaraju, G, Ramakrishnappa, T
• Format: Article
• Language: English
• ISSN: 1759-9660; 1759-9679
• DOI: 10.1039/c5ay00096c

We are proposing a simple, green and one pot ionothermal protocol for the synthesis of Ag doped TiO 2 nanoparticles. The prepared material was characterized by various spectroscopic techniques like P-XRD and XPS and then the electrocatalytic reduction and photocatalytic detoxification ability of the material towards Cr( vi ) were explored. Amperometric studies showed a linear range from 0.1 to 3.1 μM, and limits of detection and quantification of 0.01 μM and 0.033 μM, respectively. The material also showed better photochemical reduction of Cr( vi ) in sunlight compared to UV light. About 90% reduction of Cr( vi ) to Cr( iii ) was observed in 120 min in sunlight whereas 88% reduction was obtained in UV light in the same time. The Ag doped TiO 2 nanoparticle modified glassy carbon has been used for electrochemical monitoring of Cr( vi ) in natural water samples. Schematic representation of electrochemical reduction and photochemical detoxification of Cr( vi ).