Ethylene Glycol Functionalized Gadolinium Oxide Nanoparticles as a Potential Electrochemical Sensing Platform for Hydrazine and p-Nitrophenol

Abstract

The current work reports the successful synthesis of ethylene glycol functionalized gadolinium oxide nanoparticles (Gd2O3 Nps) as a proficient electrocatalytic material for the detection of hydrazine and p-nitrophenol. A facile hydrothermal approach was used for the controlled growth of Gd2O3 Nps in the presence of ethylene glycol (EG) as a structure-controlling and hydrophilic coating source. The prepared material was characterized by several techniques in order to examine the structural, morphological, optical, photoluminescence, and sensing properties. The thermal stability, resistance toward corrosion, and decreased tendency toward photobleaching made Gd2O3 nanoparticles a good candidate for the electrochemical sensing of p-nitrophenol and hydrazine by using cyclic voltammetric (CV) and amperometric methods at a neutral pH range. The modified electrode possesses a linear range of 1 to 10 µM with a low detection limit of 1.527 and 0.704 µM for p-nitrophenol and hydrazine, respectively. The sensitivity, selectivity, repeatability, recyclability, linear range, detection limit, and applicability in real water samples made Gd2O3 Nps a favorable nanomaterial for the rapid and effectual scrutiny of harmful environmental pollutants.

Multifunctional Probe Based on CTAB-Cu Nanoparticles for Fluorescence and Colorimetric Dual-Read-Out Determination of p-Nitrophenol and Glyphosate

“…Further, the absorbance of UV–vis spectra at 400 nm versus p -NP concentration from 6.67 to 600 μM showed a satisfactory linear relationship ( R 2 = 0.996) with a colorimetric LOD of 4.97 μM for p -NP (Figure G,H). The comparison of the proposed sensing strategy with previous methods − for the detection of p -NP is summarized in Table , which compares the sensitivity of response between CTAB-Cu NPs and p -NP.…”

An Overview of Gadolinium-Based Oxide and Oxysulfide Particles: Synthesis, Properties, and Biomedical Applications

“…Chaudhary S. et al [64] reported the synthesis and characterization of Gd 2 O 3 NPs functionalized with ethylene glycol (EG) by the hydrothermal method starting from GdCl 3 and EG. A variation on GdCl 3 concentration was done from 5 mM to 25 mM to study the effects of synthetic parameters over the optical, photoluminescence, and band-gap variation.…”

“…Chaudhary S. et al [64] reported the synthesis and Gd 2 O 3 NPs functionalized with ethylene glycol (EG) by the hydrothermal method starting from GdCl 3 and EG. (See Section 3.1.5 for more details).…”

“…Current literature also reveals that the chemical modification of the Gd 2 O 3 surface is more common compared to Gd 2 O 2 S. This fact is mainly due to -OH groups exposed on the Gd 2 O 3 surface, which are more chemically active under less extreme conditions, this has allowed the formation of chemical bonds to anchor different biomolecules such as APTES [74], DO 3 A-BTA [89], PMVEMA [10], EG [64], PEG [93], PAA [91], among others. In the particular case of Gd 2 O 2 S, the gadolinium ion is wholly coordinated by four oxygen and three sulfur atoms.…”

Mesoporous Metal Oxide Films

“…These materials exhibited a high surface area and uniformity of unique mesoporous particle morphology, generating many active sites, a fast-ionic transport and enhanced capacitive properties. Chaudhary et al [10] also used a hydrothermal approach for the controlled growth of gadolinium oxide (Gd 2 O 3 ) nanoparticles in the presence of ethylene glycol (EG) as a structure-controlling and hydrophilic coating source. The structural, optical, photoluminescence, and sensing properties of the prepared materials, as well as their thermal stability, resistance toward corrosion, and decreased tendency toward photobleaching made Gd 2 O 3 a good candidate for the electrochemical sensing of p-nitrophenol and hydrazine using voltammetric and amperometric techniques.…”