Sensitive methanol sensor based on PMMA-G-CNTs nanocomposites deposited onto glassy carbon electrodes

Publication date: 1 April 2016
Source:Talanta, Volume 150
Author(s): Mohammed M. Rahman, Mahmoud A. Hussein, Khalid A. Alamry, Faten M. Al Shehry, Abdullah M. Asiri
A new series of polymethyl methacrylate–graphene–carbon nanotubes crossbred nanocomposites in the form of PMMA-G-CNTs has been synthesized using simple dissolution procedure in organic media. The desired nanocomposites have been prepared using different loading (2∼30%) from consequently mixed GNPs/CNTs ratio and confirmed by various characterization techniques utilized to corroborate the assembly of these new hybrid series including X-ray diffraction analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. The PMMA-G-CNTs nanocomposites were deposited on flat glassy carbon electrodes (GCE) to result in a sensor that has a fast response toward methanol in the phosphate buffer phase. Features including high sensitivity, low-sample volume, reliability, reproducibility, ease of integration, long-term stability, and enhanced electrochemical responses are investigated. The calibration plot is linear (r²=0.9895) over the 1.0nmolL⁻¹ to 10.0mmolL⁻¹ methanol concentration ranges. The sensitivity and detection limit is 13.491µAcm⁻²mmolL⁻² and 0.39±0.1nmolL⁻¹ (at a signal-to-noise-ratio, SNR of 3), respectively. With such excellent features of analytical parameters, the developed sensor provides a new strategy for determination of methanol in biomedical and environmental analytes with satisfactory results.

Graphical abstract

from #Medicine via ola Kala on Inoreader http://ift.tt/1IcBO6X
via IFTTT