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Electrochemical sensing and photocatalysis using Ag-TiO2 microwires

Mandal, Soumit S and Bhattacharyya, Aninda J (2012) Electrochemical sensing and photocatalysis using Ag-TiO2 microwires. In: JOURNAL OF CHEMICAL SCIENCES, 124 (5). pp. 969-978.

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Official URL: http://dx.doi.org/10.1007/s12039-012-0290-9


Anatase Ag-TiO2 microwires with high sensitivity and photocatalytic activity were synthesized via polyol synthesis route followed by a simple surface modification and chemical reduction approach for attachment of silver. The superior performance of the Ag-TiO2 composite microwires is attributed to improved surface reactivity, mass transport and catalytic property as a result of wiring the TiO2 surface with Ag nanoparticles. Compared to the TiO2 microwires, Ag-TiO2 microwires exhibited three times higher sensitivity in the detection of cationic dye such as methylene blue. Photocatalytic degradation efficiency was also found to be significantly enhanced at constant illumination protocols and observation times. The improved performance is attributed to the formation of a Schottky barrier between TiO2 and Ag nanoparticles leading to a fast transport of photogenerated electrons to the Ag nanoparticles.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to INDIAN ACAD SCIENCES, BANGALORE, INDIA
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Francis Jayakanth
Date Deposited: 13 Dec 2012 05:34
Last Modified: 13 Dec 2012 05:34
URI: http://eprints.iisc.ac.in/id/eprint/45504

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