NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.19 [2012] >
IJEMS Vol.19(4) [August 2012] >


Title: Hybrid composite materials of anatase titania and conducting polyaniline: properties and chemical sensor application
Authors: Subramanian, E
Ramalakshmi, R Dhana
Vijayakumar, N
Sivakumar, G
Keywords: Polyaniline
Titania
Hybrid composites
Chemical sensor
Issue Date: Aug-2012
Publisher: NISCAIR-CSIR, India
Abstract: This paper reports the investigation on synthesis, properties and chemical sensor application of polyaniline (PANI) - anatase titania (TiO2) hybrid composite materials prepared in the presence and absence of the soft template poly (vinyl alcohol) (PVA). FTIR spectroscopy reveals that PVA favors oxidation of large amount of aniline during PANI synthesis and causes production of more number of quinoid groups than benzenoid, but TiO2 maintains an equal level of quinoid and benzenoid. XRD study shows that PVA influences the d-space and crystallite size more in PANI-PVA and less in PANI-TiO-PVA composite. In morphology, PANI-TiO2 has submicron particles and shows less agglomeration while PANI-TiO-PVA has extensive agglomeration and surface smoothness. In chemical sensor application, PANI senses CH3OH vapor with a decrease of its conductivity and with an efficiency of 56%. However, with the inclusion of TiO2 or PVA, the sensor efficiency of PANI is shifted from CH3OH to CH2Cl2. Interestingly with both TiO2 and PVA inclusion, the material PANI-TiO-PVA turns back its maximum sensor efficiency towards CH3OH but with an increase of its conductivity. All these results suggest that TiO2, PVA and TiO2-PVA exert different tuning roles on PANI yielding characteristically different hybrid materials.
Page(s): 237-244
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.19(4) [August 2012]

Files in This Item:

File Description SizeFormat
IJEMS 19(4) 237-244.pdf578.63 kBAdobe PDFView/Open
 Current Page Visits: 624 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 622009 since 06-Feb-2009  Last updated on 13-Nov-2014Webmaster: nopr@niscair.res.in