Fabrication of Gd₂O₃ Nanosheet-Modified Glassy Carbon Electrode for Nonenzymatic Highly Selective Electrochemical Detection of Vitamin B2

Abstract

A novel Gd 2 O 3 nanosheet was synthesized by the template-free chemical coprecipitation method. Interestingly, upon calcination at 600 °C, nanoparticles were transformed into a nanosheet, as observed from field emission scanning electron microscopy (FESEM) images. An increase in the calcination temperature to 600 °C increases the particle size to 50 nm, which results in aggregation. A sheetlike Gd 2 O 3 exhibits superparamagnetism from 300 K. The highly selective nonenzymatic sensing of riboflavin (RF) was studied using a modified glassy carbon electrode with Gd 2 O 3 nanosheets, and its various applications were made possible by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The redox behavior of the RF was determined. The newly fabricated sensor showed high sensitivity, stability, and reproducibility and was also tested with a commercial vitamin B2 tablet and a milk powder sample.

Cost‐effective and Facile Production of a Phosphorus‐doped Graphite Electrode for the Electrochemical Determination of Pyridoxine

“…The XPS method is used to determine the properties (valence) of the electrode by showing the binding energies of the constituent atoms (ions). The Energy Dispersive Xray (EDX) analysis is a technique of elemental analysis associated to electron microscopy based on the generation of characteristic X-rays that reveals the presence of elements present in the electrodes [29,30]. The XPS results of Bare/PGE was given in Supplementary Document, Figure S3a.…”

Selective Electrochemical Sensing of Riboflavin Based on Functionalized Multi-Walled Carbon Nanotube/Gold Nanoparticle/Pencil Graphite Electrode

“…Sulphur (S) which was seen The chemical information about the surface of the electrode can be identified by XPS and was found to be effective in determining the properties of the constituent atoms (ions) by displaying their binding energies. [41][42][43] Figures 6a and 6b show the XPS profiles of the f-MWCNT/AuNP/PGE. As shown in Fig.…”

İtriyum Katkılı Gadolinyum Oksit Numunelerinin Sentez ve Karakterizasyonu

“…1066 cm -1 ve 1399 cm -1 'de gözlenen bantlar atmosferden numuneye adsorbe olan karbonat grubuna ait C-O bağıyla alakalı titreşimler ile ilişkilendirilebilir [42]. FTIR spektrumunda 2897 cm -1 ve 3000 cm -1 'de tespit edilen bantlar C-H titreşimlerine aittir [43,44]. 3687 cm -1 'de gözlenen bant hidroksil grubuyla alakalıdır [45].…”