Morphological and Chemical Analysis of the Molecularly-Imprinted Polymer-Based D-Arabinose Sensor on a Modified Electrode with Functionalized Carbon Nanotubes

Abstract

The sensors modified carbon nanotubes and molecularly imprinted polymers are an excellent choice for the determination of D-arabinose, because they have high selectivity and sensitivity for analysis. This allows the control and optimization of the second generation ethanol production process, given the clear understanding of the chemical changes that occur through the hydrolysis of lignocellulosic biomass. For this reason, the present work presents a chemical study of the functional groups of the chemical species present on the sensor surface by the Fourier transform infrared spectroscopy (FT-IR) technique and a morphological analysis by the scanning electron microscopy (SEM) technique.

Impedimetric Sensor for Pentoses Based on Electrodeposited Carbon Nanotubes and Molecularly Imprinted poly-o-phenylenediamine

“…According to works already carried out in our research group, the electrodeposition of FMWCNTs by 15 successive scans presents good electrochemical characteristics. 29 Table I shows the increase in ECS Journal of Solid State Science and Technology, 2020 9 041006 the anodic (I pa ) and cathodic (I pc ) currents of the voltammograms peaks in Fig. 2, as well as the decrease in the difference between the anodic and cathodic peak potentials (|E pa -E pc |) after modification with FMWCNTs.…”

“…FMWCNT were electrodeposited onto surface of the GP (C/FMWCNT) by CV in a potential range of −0.5 to 1.0 V with a scan rate of 50 mV s −1 in a suspension of 0.5 mg ml −1 of FMWCNT in 0.55 mol l −1 of HNO 3 . 29 Preparation of MIP electrodes.-The procedure for obtaining and using impedimetric MIPs sensors for pentoses occurs in three steps. Figure 1 shown a scheme of the obtaining, extraction and rebinding, first, second and third steps, respectively, for MIPs electrodes.…”