Solid-State Heating Synthesis of Poly (3,4-Ethylenedioxythiophene)/Gold/Graphene Composite and Its Application for Amperometric Determination of Nitrite and Iodate

Abstract

A ternary composite of poly (3,4-ethylenedioxythiophene)/gold/graphene (PEDOT/Au/GO) for promising electrochemical sensor was synthesized by solid-state heating method. The interaction between the PEDOT, Au, and GO explored for detection of nitrite and iodate. It was found that the PEDOT/Au/GO composite had shale-like morphology with a uniform distribution of gold nanoparticles. Electrochemical experiments showed that the PEDOT/Au/GO composite modified electrode exhibited good electrocatalytic activity toward determination of iodate. The amperometric experiments at the PEDOT/Au/GO/GCE revealed that a good linear relationship existed between peak current and the concentration in the range of 100–1000 μM with the detection of 0.53 and 0.62 μM (S/N = 3) for nitrite and iodate, respectively. Moreover, the current response of PEDOT/Au/GO/GCE for nitrite and iodate at 10 μM was up to 9.59 and 11.47 μA, respectively. Mechanisms of the direct electron transfer between ion(nitrite or iodate)and the PEDOT/Au/GO composite

Synthesis and Characterisation of Gold Nanoparticles/Poly3,4-Ethylene-Dioxythiophene/Reduced-Graphene Oxide for Electrochemical Detection of Dopamine

“…The thickness of the GO sheets depends on the density of the functionalities of the sheets. 31 The rGO composite showed the single silk-like layer (Fig. 3c) which contrasts with the GO sheets with more rough-like surface due to the reduction of oxygen functionalities.…”

Simultaneous Electrochemical Detection of Multiple Bacterial Species Using Metal–Organic Nanohybrids

“…Compared to bulk metals, metal nanoparticles possess unique properties such as catalytic activity and localized surface plasmons due to specific surface area effects. − In addition, using glass or a polymer to protect the metal nanoparticles facilitates their stable dispersion and optimizes their exceptional characteristics. − Conductive polymers such as polyaniline (PANI), polypyrrole, and PEDOT can be easily synthesized using chemical and electrochemical methods and can be easily hybridized with metal nanoparticles. − The hybridization of metal nanoparticles and conductive polymers is expected to endow various functions, such as environmental stability, electrical conductivity, and electrochemical activity. , Previously, we successfully developed organic–inorganic hybrids with a densely assembled structure of gold nanoparticles (AuNPs) in a PANI matrix. − This fabrication method exploited the fact that the reduction of aurate by aniline and the oxidation of aniline by aurate occurred in the same reaction field, enabling the production of nanometer-scale hybrids in a single process. We attempted to detect bacteria using the characteristic optical and electrochemical properties of the hybrids. − …”