Kundu, Susmita and Choudhury, Abhik and Mursalin, Sk Md and Narjinary, Mousumi and Manna, Raju (2015) Synthesis, characterization and low concentration ethanol sensing performance of sol-gel derived La(III) doped tin oxide. Journal of Materials Science-Materials in Electronics, 26 (8, SI). pp. 6252-6260. ISSN 0957-4522

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Nanocrystalline undoped and lanthanum(III) doped (2, 4 and 6 at%) tin oxide powders were synthesized using sol-gel processing from their water based precursor sols. Microstructures and surface morphologies of all powders were characterized using X-ray diffractometer, BET surface area, UV-Visible spectrophotometer, scanning and transmission electron microscope along with energy dispersive X-ray diffractometer. XRD and UV-Vis spectral analyses revealed decrease of tin oxide crystallite size on La(III) doping. 4 at% La(III) doped powder showed similar to 5 nm average particle size and similar to 42 m(2)/g surface area respectively. A systematic comparison study revealed that sensors made from 4 at% La(III) doped SnO2 powder exhibited optimum ethanol vapor sensing performance at operating temperature, 350 degrees C (response similar to 70 % for 10 ppm ethanol) with excellent response and recovery times. Even for very low concentration ethanol vapour (1 ppm) response observed was similar to 53 %. A possible mechanism for enhancing sensitivity on La(III) doping has been discussed.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sensor and Actuator
Depositing User: Bidhan Chaudhuri
Date Deposited: 30 Dec 2015 12:16
Last Modified: 30 Dec 2015 12:16
URI: http://cgcri.csircentral.net/id/eprint/3019

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