Electrochemical Sensors Based on a Composite of Electrochemically Reduced Graphene Oxide and PEDOT:PSS for Hydrazine Detection

Abstract

In this study, hydrazine sensors were developed from a composite of electrochemically reduced graphene oxide (ErGO) and poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), deposited onto a glassy carbon electrode (GCE). The structural properties, electrochemical characterization, and surface morphologies of this hydrazine sensor were characterized by Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). In addition, the proposed hydrazine sensor also demonstrates good electrochemical and analytical performance when investigated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and amperometry techniques under optimal parameters. Using these investigated parameters, DPV and amperometry were chosen as techniques for hydrazine measurements and showed a linear range of concentration in the range of 0.2−100 μM. The obtained limits of detection and limits of quantitation for hydrazine measurements were 0.01 and 0.03 μM, respectively. In addition, the proposed sensor demonstrated good reproducibility and stability in hydrazine measurements in eight consecutive days. This fabricated hydrazine sensor also exhibited good selectivity against interference from Mg 2+ , K + , Zn 2+ , Fe 2+ , Na + , NO 2 − , CH 3 COO − , SO 4 2− , Cl − , ascorbic acid, chlorophenol, and triclosan and combined interferences, as well as it depicted %RSD values of less than 5%. In conclusion, this proposed sensor based on GCE modified with ErGO/PEDOT:PSS displays exceptional electrochemical performance for use in hydrazine measurements and have the potential to be employed in practical applications.

Electrochemical sensor based on PVP coated cobalt ferrite/graphite/PANI nanocomposite for the detection of hydrazine

“…The PVP stabilized the aggregation of cf Moreover, the presence of O and N in PVP extended the affinity of these particles to interact with graphite-layered particles. CF nanoparticles did not wholly block the sight of conductive graphite, as pseudocapacitive behaviour was observed in the CV of the CG/G electrode [25]. Furthermore, the dispersed CF nanoparticles provided nucleation sites for the growth of PANI on the surface of graphite.…”

Advanced graphene-based (photo & electro) catalysts for sustainable & clean energy technologies

“…These features enable graphene to strongly adsorb target ions, increase surface concentration, improve sensitivity, and reduce surfactant fouling. 443,444,448,449 4.4.2. Electrochemical behavior of GCE modified with ErGO/PEDOT:PSS.…”

Dual Linear Range Laser-Induced Graphene-Based Sensor for 4-Nitrophenol Detection in Water

“…These properties, along with its low cost compared to other materials, make it a viable option for electrochemical sensors . Earlier efforts for electrochemical detection of 4-NP using graphene-based material as sensors have been made with different nanomaterials. − Metal nanoparticles such as gold and silver have been used with reduced graphene oxide (rGO). For example, Tang et al demonstrated a facile method of rGO and gold nanocomposite fabrication for the electrochemical detection of 4-NP .…”