Molecularly Imprinted Electrochemical Sensor Based on Modified Reduced Graphene Oxide‐gold Nanoparticles‐polyaniline Nanocomposites Matrix for Dapsone Determination

Abstract

This work was designed to develop an electrochemical sensor based on molecular imprinted polyaniline membranes onto reduced graphene oxide (RGO) and gold nanoparticles (AuNPs) modified glassy carbon (GC) electrode for dapsone (DDS) determination. The prepared RGO/AuNPs/PANI‐MIPs nanocomposite was characterized by Ultra‐Violet‐Visible (UV‐Vis), Fourier transform infrared spectroscopy (FT‐IR) and scanning electronic microscopy (SEM) images. The feature of the imprinted electrode was evaluated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and impedance spectroscopy (IS). Throughout this study several analytical parameters, such as incubation time, pH value, concentration of monomer/template molecules and electro‐polymerization cycles were investigated. Under the optimized conditions, the experimental results showed best analytical performances for DDS detection with a sensitivity of 0.188 Ω/mol L−1, a linear range from 1.0×10−7 M to 1.0×10−3 M and a detection limit of 6.8×10−7 M. The bioanalytical sensor was applied to the determination of dapsone in real samples with high selectivity and recovery.

Investigating layer-by-layer films of carbon nanotubes and nickel phthalocyanine towards diquat detection

“…The continued process to more negative potentials can be an overlap of phthalocyanine ring reduction 31 and the reduction of oxygen functional groups in the MWCNT moieties. 32 , 33 .

Figure 5 ( A ) DQ and PQ structures.

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Application of molecular imprinting technology based on new nanomaterials in adsorption and detection of fluoroquinolones

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Electroconductive Green Metal‐polyaniline Nanocomposites: Synthesis and Application in Sensors

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