Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 187, Issue -, Pages 407-412Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.12.106
Keywords
Nanocomposite; Polyaniline-MWCNTs; Spectroscopy; pH sensor
Funding
- Department of Electronics and Information Technology (DeitY), New Delhi
Ask authors/readers for more resources
Highly transparent and water soluble nanocomposite of conducting polyaniline wrapped-multiwalled carbon nanotubes (PANI-MWCNTs) was synthesized by in situ chemical polymerization method using sulphonic acid as a dopant. MWCNTs were functionalized prior to their use and then polymerized using ammonium per sulphate as an oxidizing agent. The nanocomposite was subjected for physico-chemical characterization using spectroscopic (UV-vis and FT-IR), FE-SEM and HR-TEM analysis. The UV-vis spectrum of the salt phase (dark green) of the PANI-MWCNTs nanocomposite shows a free carrier tail with increasing absorption at higher wavelength, which confirms the presence of conducting emeraldine salt phase of the polyaniline and is further supported by FT-IR analysis. However, the base form (deep blue) of the nanocomposite shows a sharp peak at 600 nm representing an insulating emeraldine base phase of the polymer. The FE-SEM images show the uniform wrapping/coating of the polyaniline over the functionalized MWCNTs and this is further supported by HR-TEM analysis. The synthesized nanocomposite was then successfully used for the determination of pH of the solution (pH 1-12) and found to be a potential candidate for optical pH sensing. (C) 2013 Elsevier B. V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available