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Development of Methanol Sensors: Carbon Nanotubes Blended Hydroxyapatite Nano-Ceramics

Authors:
Shaikh Reshma Anjum
Rajendra Khairnar

Keywords: Carbon nanotubes; Gas sensor; Hydroxyapatite; Methanol sensor

Abstract:
The experimental study reports the performance of Carbon nanotubes (CNT) blended Hydroxyapatite (HAp) composites as a a sensing material for the detection of methanol vapours. The main objective of the work is to improve the temperature dependent sensitivity of the sensor for lower methanol concentration. Moreover, the sensing ability of native HAp and CNT blended HAp thick films is studied in terms of operating temperature, response / recovery time, maximum detection limit. Thick films of the native and blended materials are fabricated via screen printing technique. The sensing parameters are studied using two probe electrical methods. Sensor substrate is made by means of doping of various concentrations of CNT in HAp. The sensing of methanol vapours is studied at a fixed concentration of 100ppm. Native HAp substrate shows good sensitivity for methanol at room temperature; however its sensing performance is inferior to the CNT blended materials. Blended composites exhibit impressive sensing ability compared with native HAp in term of sensitivity, response/ recovery time and maximum up take the limit. The sensing mechanism for methanol detection, the role of HAp as a parent material and CNT as an additive, is explained using a suitable sensing mechanism.

Pages: 48 to 52

Copyright: Copyright (c) IARIA, 2016

Publication date: July 24, 2016

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-494-7

Location: Nice, France

Dates: from July 24, 2016 to July 28, 2016