A hydrogen peroxide electrochemical sensor based on silver nanoparticles decorated three-dimensional graphene

Abstract

A facile strategy has been developed to synthesize sliver nanoparticles (Ag NPs) decorated three-dimensional graphene (3DG) through hydrothermal process. The AgNPs-3DG composites are directly fabricated into a free standing sensing electrode for electrochemical detection of hydrogen peroxide (H2O2) in phosphate buffered solutions. Various techniques equipments including scanning electron microscopy, X-ray diffraction, and Raman spectroscopy are used to characterize the morphology and structure of the as-prepared composite. The electrochemical experiments reveal the AgNPs-3DG based biosensor exhibits fast amperometric sensing, low detection limitation, wide linear responding range, and perfect selectivity for non-enzyme H2O2 detection, indicating the well synergistic effect of Ag NPs high electrocatalytic activity and 3DG high conductivity and large surface area.

Free‐Standing 3D Electrodes for Electrochemical Detection of Hydrogen Peroxide

“…The immobilized thionine groups effectively improve the efficiency and reversibility of the redox process and the highly conductive graphene with 3D multiplexed conductive pathways and macroporous structure ensures efficient mass transport. 3D graphene decorated with gold nanoparticles, silver nanoparticles, platinum‐ruthenium bimetallic nanocatalysts, nanocomposite of Pt nanoparticles, multiwall carbon nanotubes and MnO 2 nanowalls, et al, further confirmed the feasibility of suitable catalysts and substrates for detection. Especially, the 3D graphene network/multiwall carbon nanotubes/Pt nanoparticles composite electrode exhibited a lower detection limit (8.6 nM) to H 2 O 2 than that of 3D graphene network/carbon nanotube electrode and 3D graphene network/Pt nanoparticles electrode (Figure ).…”

Enhanced electron transfer mediated detection of hydrogen peroxide using a silver nanoparticle–reduced graphene oxide–polyaniline fabricated electrochemical sensor

“…Such ndings provided the valuable information on the use of AgNPs-rGO-PANI-GCE as an electrode modier; the presence of PANI along with AgNPs-rGO-GCE character increased the analytical performance. Based on previously reported mechanism, 25,39,40 the electrocatalytic reduction of H 2 O 2 on electrocatalyst occurred according to the following mechanism:…”

“…25,26 However, the detection of a precise cathodic current by examining the contribution of the PANI in the AgNPs-rGO nanocomposite plays an essential role that allows the selective detection of preferred analytes in several practical applications. In the current work, the AgNPs-rGO-PANI composite modied GCE was employed as a simple electrochemical sensor for the rapid determination of H 2 O 2 cathodically, through the involvement of PANI in AgNPs-rGO-PANI nanocomposite.…”

Facile Synthesis of Electrospun Nickel (II) Oxide Nanofibers and Its Application for Hydrogen Peroxide Sensing

“…Hence, researchers are highly focusing on the cost effective non‐enzymatic sensors for detection of H 2 O 2 . Recent studies show that some noble metals, including Ag, Au, Pt, and metal alloy have been used as H 2 O 2 sensors because of their high electrocatalytic activities . Pure metals and metal alloys are preferred for high sensitivity but their limit of detection (LoD) and range of detection is very low as compare with metal oxides and also these materials are expensive.…”