Fabrication and characterization of tin oxide (SnO2) nanomaterial as carbon dioxide (CO2) gas sensor

College

College of Science

Department/Unit

Physics

Document Type

Archival Material/Manuscript

Publication Date

2012

Abstract

In this research study, tin oxide (SnO2) nanomaterials were fabricated and characterized using the Horizontal Vapor Phase Growth (HVPG) Technique. The nanostructures formed by the technique were deposited on a silicon substrate to test the sensitivity of the material in a carbon dioxide gas sensor operated at room temperature. The growth temperature was the same for all the various dwell times which was 1200°C. Meanwhile, the different dwell times were set at 4 hours, 6 hours, and 8 hours with a ramp rate of 10°C/minute. The surface topography, morphology and elemental composition of the synthesized SnO2 nanomaterials were investigated through SEM and EDX. The nanostructures deposited in the seed were found to be sensitive to CO2 gas exposure. This indicates that any nanostructures formed in the different dwell times were also found to be receptive in the gas exposure. Though remarkably all the different dwell times used have significantly responded to the CO2 gas, it was noted that the sensor exhibited greatest response at the least dwell time which was grown at 4 hours. The best result sensitivity response has the average value of S = 1.142.

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Disciplines

Physics

Note

Undated; Publication/creation date supplied

Keywords

Nanostructured materials; Carbon dioxide

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