Sonochemical synthesis of silver nanoparticles anchored reduced graphene oxide nanosheets for selective and sensitive detection of glutathione

Abstract

Developed here an eco-friendly, one-pot approach toward rapid synthesis of silver nanoparticles anchored reduced graphene oxide (AgNPs-rGO) nanosheets via sonochemical irradiation method, using an aqueous solution mixture of GO and AgNO in the presence of N-[3(trimethoxysilyl)propyl] ethylenediamine (TMSPED) without any reducing agent. As synthesized decorated nanosheets was thoroughly characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Pristine AgNPs, pristine rGO and as prepared AgNPs-rGO materials were employed to modify the glassy carbon (GC) electrode and demonstrated its excellent electrocatalytic activities towards glutathione (GSH). Voltammetry and amperometry measurements were utilized to assess the electrochemical properties towards the glutathione detection. When the Ag nanoparticles were anchored onto the rGO surface, the observed results illustrated that the electrocatalytic properties of rGO might be enhanced. The resulting sensor exhibits excellent repeatability and long-term stability. Furthermore, AgNPs-rGO/GC electrode able to be employed for the selective determination of GSH in amperometric analysis in the presence of ascorbic acid (AA), dopamine (DA), uric acid (UA) and glucose. Finally, this modified electrode was effectively applied to determine glutathione in real samples with good recoveries.

Green Preparation of Ag-Au Bimetallic Nanoparticles Supported on Graphene with Alginate for Non-Enzymatic Hydrogen Peroxide Detection

“…Then, AgNPs would serve as nucleation sites and HAuCl 4 was directly reduced around AgNPs on graphene. It is worth noting that, in the whole process, Ag-AuNPs/RGO was prepared without the aid of surfactant, so that the metal nanoparticles catalyst was completely exposed during the catalytic process, which is conducive to the direct contact of the catalyst [ 33 , 34 ]. Scheme 1 illustrated the synthesis of Ag-AuNPs/RGO and its application in the electrochemical detection of H 2 O 2 .…”

Neodymium-decorated graphene oxide as a corrosion barrier layer on Ti6Al4V alloy in acidic medium

“…GO + Nd spectrum presents the same bands with a noticeable higher intensity G band as well as a peak at around 780 cm À1 related to Nd(OH) 3 nanorods, corroborating the strong GO reduction suggested by the results from FTIR spectroscopy. 44,45 The X-ray diffractograms of the neodymium-decorated graphene oxide and GO are shown in Fig. 3B.…”

Influence of the Silver Nanoparticles (AgNPs) Formation Conditions onto Titanium Dioxide (TiO2) Nanotubes Based Electrodes on Their Impedimetric Response

“…Besides traditional methods of silver nanoparticles production like chemical reduction of silver salts [24,25] using various (often expensive and toxic) reagents, new methods have been developed in recent years. The AgNPs have been produced by electrochemical methods [26], laser synthesis [27], sputter deposition [28], microwave irradiation [29], sonochemical synthesis [30] and photoreduction [31]. The methods of depositing AgNPs on TNT, which do not require the use of additional agents, are electrodeposition [32], i.e.…”