Fabrication of a Novel Electrochemical Sensor Based on Carbon Cloth Matrix Functionalized with MoO3 and 2D-MoS2 Layers for Riboflavin Determination

Abstract

The preparation and characterization of a hybrid composite, based on carbon cloth (CC) matrix functionalized with two-dimensional (2D) MoS2 flakes and MoO3, and its use for developing an electrochemical sensor for the determination of riboflavin (RF) is here reported. The 2D-MoS2-MoO3CC composite was prepared by depositing 2D-MoS2 nanosheets, obtained by liquid phase exfoliation (LPE), on the surface of a carbon cloth fiber network, previously functionalized with a layer of molybdenum oxide (α-MoO3) by radio-frequency magnetron reactive sputtering technique. The 2D-MoS2-MoO3CC composite was characterized by scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDX), and Raman spectroscopy. An electrochemical sensor has been then fabricated by fixing a slice of the 2D-MoS2-MoO3CC composite on the working electrode of a screen-printed carbon electrode (SPCE). The 2D-MoS2-MoO3-CC/SPCE sensor display good electrochemical characteristics which have been exploited, for the first time, in the electroanalytical determination of riboflavin (RF). The sensitivity to RF, equal to 0.67 µA mM−1 in the linear range from 2 to 40 µM, and a limit of detection (LOD) of 1.5 µM at S/N = 3, demonstrate the promising characteristics of the proposed 2D-MoS2-MoO3-CC/SPCE electrochemical sensor for the determination of riboflavin.

Boron Carbon Nitride-Based Poly β-Cyclodextrin/Sulfur-Doped Quantum Dot-Modified Electrodes for Highly Sensitive Detection of 2-Amino-5-Nitrophenol

“…By comparing the voltammogram obtained from PIGE/BCN and bare electrodes, no distinct peaks were observed however, enhancement in the background current was observed in the case of PIGE/BCN electrodes. This increase in the background current for the PIGE/BCN electrode is due to its considerable electrochemical double-layer capacitance . The voltammogram derived from PIGE/BCN/pβCD and PIGE/BCN/pβCD/SGQD electrodes show oxidation peak at 0.3 and 0.23 V, respectively, with the PIGE/BCN/pβCD/SGQD-modified electrode exhibiting increased current intensity.…”

Study on Synthesis and Properties of New Nanomaterials in Inorganic Chemistry

“…The physical and chemical properties of inorganic nanomaterials are significantly different from those of traditional materials because of their high specific surface area, small size and special quantum effect. Therefore, the study of its performance is the key to evaluate its application potential and develop new fields [9].…”