Pt Nanoparticle-Decorated Se Rods for Electrochemical Detection of 17β-Estradiol and Methanol Oxidation

Abstract

Fabricating platinum (Pt) nanoparticle-draped selenium (Se) rods over the spacious region of glassy carbon electrodes could stimulate an impressive electrocatalytic activity owing to the synergic effect and interfacial property between Pt and Se, the oxophilic property and the anchoring effect of Se, the electron confinement effect, and the surface-to-volume ratio possessed by Pt. Examination of the structure and morphology highlights the physical and chemical properties of the Pt/Se catalyst, as revealed by different physicochemical characterization techniques. From these characterizations, we identified a dual-functional electrocatalyst Pt/Se for electrochemical detection of 17β-estradiol (E2) and methanol oxidation. When used for the electrochemical detection of estradiol, the Pt/Se catalyst displays an excellent response toward electro-oxidation of estradiol in the linear sweep voltammetry (LSV) and the amperometry-it technique. The proposed sensor utilizes a concentration range that varies from 0.05 to 85.5 μM with good sensitivity (0.0376 mA μM–1 cm–2), a lower limit of detection (LOD) being 11.12 nmol L–1, and the limit of quantitation (LOQ) being 36.06 nmol L–1. It yields lower detection limits (LODs: 13.17 and 17.04 nmol L–1) even on detecting estradiol in environmental water samples (river and tap water samples) at a buffered pH of 7.0. In the methanol oxidation reaction (MOR), the Pt/Se catalyst displays a good mass activity and turnover number (TON) of 2.37 A/mg and 1.36 s–1, respectively, by cyclic voltammetry and chronoamperometry. As a result, the prepared Pt/Se electrocatalyst, has provided a creditable combination of stability, electron transfer rate, conductivity, and dual applicability to the electrochemical sensor and the methanol oxidation fuel cell for the first time.

Fabrication of Praseodymium Vanadate Nanoparticles on Disposable Strip for Rapid and Real-Time Amperometric Sensing of Arsenic Drug Roxarsone

“…Furthermore, the PrVO 4 -modified electrode has wide linear ranges of 0.001–551.78 μM, a low detection limit of 0.4 nM estimated based on a signal-to-noise ratio of 3 (S/N = 3), − and the sensitivity of 81.63 μA μM –1 cm –2 estimated as per the reported studies (Table ). The enhanced electrocatalytic behavior of the proposed sensor is owed to praseodymium Pr 3+ , for instance, is a possible rare-earth element with exceptional modes of electronic transitions and an unusual structure because of the existence of intestine empty space.…”

A self-powered electrochemical aptasensor for the detection of 17β-estradiol based on carbon nanocages/gold nanoparticles and DNA bioconjugate mediated biofuel cells

“…27,28 Accordingly, developing efficient and sensitive methods for the monitoring of E2 levels is of great significance. So far, many different techniques have been established for the determination of E2, such as gas chromatography/ liquid chromatography-mass spectrometry (GC/LC-MS), 29,30 enzyme-linked immunosorbent assay (ELISA), 31,32 colorimetry, [33][34][35] fluorescence, [36][37][38][39] electrochemistry, [40][41][42][43][44][45][46] and surface-enhanced Raman spectroscopy. 47,48 Nevertheless, these methods might suffer from the high cost of devices, the need for high levels of technical skill, low sensitivity, cumbersome operation processes and the need for sample pretreatment.…”