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In this study, the preparation of a glassy carbon electrode (GCE) modified with multiwall carbon nanotubes|MnO 2 nanoparticles (MWNT|MnO 2 ) was developed for electrocatalytic detection of theophylline (TP). Electrochemical behavior of the modified electrode was evaluated by cyclic voltammetry (CV) technique. The modified electrode exhibited good promotion to the electrochemical...
Three solid oxide cells have been investigated after long-term high temperature electrolysis to explain the phenomena of accelerated degradation. These cells contain a Ni-YSZ cermet (Ni-yttria-stabilised-zirconia) as hydrogen electrode (cathode), yttria-stabilised-zirconia (YSZ) as electrolyte, Ce 0.8 Gd 0.2 O 1.9 (CGO) as diffusion barrier layer and La ...
In this paper, the simultaneous determination of β-blockers (atenolol (ATN) and propranolol (PRO)) was investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) at platinum nanoparticle-doped multiwalled carbon-nanotube-modified glassy carbon electrode (PtNPs/MWCNTs/GCE) in 0.1 M PBS (pH 7.4) solution. The modifier, PtNP-doped MWCNTs (PtNPs/MWCNTs), was characterized by transmission...
The interaction of epinephrine (EP) with DNA, including double-strand DNA (dsDNA) and single-strand DNA (ssDNA) were investigated both in Mcllvaine buffer solution and on a glassy carbon electrode (GCE) modified with Au nanoparticles (nanoAu/GCE). In pH 7.0 Mcllvaine buffer solution, EP had a sensitive oxidation current peak at 0.162 V (vs. SCE) on the nanoAu/GCE. Factors influencing the interaction...
In this study, a carbon paste electrode (CPE) was chemically modified with Pt/carbon nanotubes (CNTs) nanocomposite and 8,9-dihydroxy-7-methyl-12H-benzothiazolo [2,3-b] quinazolin-12-one (DMBQ). The synthesized nanocomposite was characterized with different methods such as transmission electron microscopy (TEM) and X-ray diffraction (XRD). The modified electrode was used as an electrochemical...
A conducting polymer-based advanced nanocomposite ion exchanger was synthesized by incorporating polyaniline (PANI) into the inorganic counterpart zirconium(IV) selenotungstophosphate (ZSWP). The nanocomposite exhibited an excellent ion exchange capacity of 1.20 meq g −1 in addition to high thermal stability. The polymeric–inorganic nanocomposite ion exchanger was characterized...
Relaxations in polymer electrolytes were studied in poly(ethylene oxide) and epoxidized natural rubbers both filled with lithium perchlorate. Impedance relaxation was investigated over a wide range of salt concentration at room temperature. Imaginary part of impedance as a function of frequency exhibits generally one maximum and one minimum. These two extreme values rule properties in the DC limit...
Time-dependent elementary polarizations of FeF 3 ·3H 2 O/C cathode material were quantitatively investigated in dc polarization in order to determine the key factors that comprise the total polarization. The measurement of electrochemical impedance spectrum at a given state of charge and the subsequent least square fitting of its equivalent circuit allow the calculation...
A dinitrile compound containing ethylene oxide moiety (4,7-dioxa-1,10-decanedinitrile, NEON) is synthesized as an electrolyte solvent for high-voltage lithium-ion batteries. The introduction of ethylene oxide moiety into the conventional aprotic aliphatic dinitrile compounds improves the solubility of lithium hexafluorophosphate (LiPF 6 ) used commercially in the lithium-ion battery...
In this study, we report a surfactant-free and template-free method for the high-yield synthesis of tryptophan and caffeic acid-based resin (TCCR) microspheres for the first time. The method is based on the polymerization reaction of tryptophan and caffeic acid in the formaldehyde aqueous solution to generate resin colloidal microspheres. The Au nanoparticles (AuNPs)-decorated TCCR microspheres prepared...
Films consisting of phosphorus-doped multi-walled carbon nanotubes (further denoted as P-MWCNTs) were fabricated by means of chemical vapor deposition technique with decomposition of triphenylphosphine in the presence of catalyst. The P-MWCNTs films were characterized using scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The P-MWCNTs films were electrochemically...
The Li 2 BaP 2 O 7 compound has been obtained by the conventional solid-state reaction and characterized by X-ray powder diffraction. The title material crystallizes in the monoclinic system with C2/c space group. Electrical properties of the compound have been studied using complex impedance spectroscopy in the frequency range 200 Hz–5 MHz and temperature...
In order to prolong the service life and to identify the failure mechanism of ionic polymer metal composites (IPMC), Ag-IPMC strips were prepared and were analyzed experimentally and through simulations to investigate the actuating characteristic of IPMC. The surface morphology of active and inactive Ag-IPMC is characterized by electron microscope to analyze the change rules of surface microstructure...
Almond shell-based chemically treated and activated nanoporous charcoal powder (AS(T)) has been successfully prepared by chemical activation method using potassium hydroxide (KOH) as an activating agent. The as-synthesized AS(T) was systematically characterized by various techniques like N 2 adsorption, scanning electron microscopy (SEM), X-ray diffraction, and thermogravimetric...
The 20 % yttrium doped barium cerate (BCY20) powder has been synthesized by cost effective solution combustion method. The flame temperature measured by pyrometer was 1055 °C, less than the adiabatic temperature due to various losses. The phase formation and evolution was studied with TG-DTA and XRD. The carbonate free orthorhombic BCY20 phase was obtained upon calcination at 900 °C. The microstructure...
Photoelectrochemical properties of p-nickel oxide (NiO) thin film deposited on fluorine-doped tin oxide (FTO) electrode, by combination of co-precipitation in aqueous media along with the dip-coating process, were investigated by cyclic voltammetry and chronoamperometry techniques in sodium sulfate (Na 2 SO 4 ) electrolyte solution. The electrochemical characterization...
First-principle calculations based on density functional theory have been performed to investigate the negative electrode behaviors, structural changes, and electronic and bonding properties of lithium intercalated antimonides Ag 3 Sb and Mg 3 Sb 2 . Initial intercalation of lithium to orthorhombic Ag 3 Sb led to form cubic Li 2 AgSb...
In the present study, different mole percent of SiO 2 (~10–20 nm) was dispersed into 85.32[NaNO 3 ]–14.68[Sr(NO 3 ) 2 ] mixed system. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and differential scanning calorimetry (DSC) characterizations were carried out on present dispersed system...
A new type of solid polymer electrolyte based on iota (ɩ)-carrageenan derivative has been investigated. ɩ-Carrageenan was reacted with monochloroacetic acid to produce carboxymethyl ɩ-carrageenan. The produced powders were characterized by 1 H nuclear magnetic resonance and attenuated total reflection Fourier transform infrared spectroscopy to confirm the substitution of targeted...
Based on the ultrasonic cavitation assisted hydrogen implosion method, Pt nanoparticles (NPs)/nitrogen-doped graphene nanohybrid scrolls (Pt NPs/N-GNSs) were synthesized. As the results of the N-doping and high reduction degree of graphene, and scroll structure of the nanohybrids, the Pt NPs/N-GNSs electrocatalyst shows excellent performance in the direct oxidation of methanol: low onset and peak...
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