Amperometric H2O2 sensor based on gold nanoparticles/poly (celestine blue) nanohybrid film

Abstract

The present paper demonstrates a significant hybrid nanofilm using gold nanoparticles (GNPs) and poly celestine blue (PCB) as an effective sensing material for hydrogen peroxide (H 2 O 2 ). The surface assembly of the nanocatalyst GNPs provides greater surface area for improved layering of PCB on the electrode surface. Cyclic voltammetry, UV visible spectroscopy and field emission scanning electron microscopy studies confirmed the structure and morphology of the synthesized GNPs. Cyclic voltammetric characterization of the fabricated GNPs/PCB electrode was performed and under optimal conditions they exhibited enhanced electrochemical sensing towards H 2 O 2 with better sensitivity and detection limit as 0.22 µA/µM and 3.9 × 10 −6 M (S/N = 3). The interference studies using the GNPs/PCB modified electrode interprets the selectivity of the electrode towards H 2 O 2 . The proposed sensor was highly stable and was effectively applied for analysis of H 2 O 2 in real samples.

Novel Platinum-Porphyrin as Sensing Compound for Efficient Fluorescent and Electrochemical Detection of H2O2

“…The detection and quantification of oxygen in its various forms is of great importance because reactive oxygen species (ROS), such as: peroxide radicals (ROO • ), hydroxyl radical ( • OH), hydrogen peroxide (H 2 O 2 ), singlet oxygen ( 1 O 2 ), and ozone (O 3 ) are intracellularly generated during some of the enzymatic oxidation processes that are involved in the metabolism of proteins, carbohydrates and fats [1]. The normal concentrations of H 2 O 2 for plasma were determined to be 1-5 µM, while higher values, in the range of 30-50 µM, can appear during chronic inflammation [2].…”

The synthesis of sulfur-doped carbon nanofibers using chemical vapor deposition on the nickel-ferrite catalyst and the gold decoration of the product for morphine sensing

“…Therefore, the use of the prepared SCNF as a morphine sensor has been considered in this study. In this line, gold-decoration on the surface of SCNFs has also been investigated [24][25][26][27].…”