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The simultaneous voltammetric determination of binary mixture containing hydrochlorothiazide (HCTZ) and enalapril (ENP) using a multi-walled carbon nanotubes paste (MWCNTsP) electrode is reported for the first time in the literature. Compared with the glassy carbon electrode or carbon paste electrode, MWCNTsP electrode showed excellent responses for the oxidation of HCTZ and especially for ENP. Square-wave...
Ce0.8Sm0.2O2 − δ–LnBaCo2O5 + δ (SDC-LnBCO, Ln=La, Nd, Sm, and Y) composites were prepared and characterized as dense ceramic membranes for oxygen separation. Ce0.8Sm0.2O2 − δ (SDC) shows a good chemical compatibility with LaBaCo2O5 + δ (LBCO), NdBaCo2O5 + δ (NBCO), and SmBaCo2O5 + δ (SBCO), while a little of impurity is detected in the sample with YBaCo2O5 + δ (YBCO). The SDC-SBCO and SDC-YBCO samples...
A new carbon coating method for improving the performance of anode material of lithium ion battery is proposed in this paper. In this method, cetyl trimethyl ammonium bromide (CTAB) is used as dispersant and phenolic resin formed in situ on Li4Ti5O12-TiO2 is used as carbon precursor; thus, uniform coated sample with low carbon content is achieved. Three samples with different carbon contents are prepared,...
The effect of clay reinforcement on dielectric, conductivity, and mechanical relaxation behavior of a polymer clay nanocomposite film is reported. Polymer nanocomposite is composed of three component polymers (polyacrylonitrile) as a host matrix, salt (LiPF6) as conducting species, and clay (sodium montmorillonite) as intercalant. The macroscopic parameters like polymer glass transition temperature...
Nanostructured photoelectrochemical solar cells have been prepared by combining a Sb2S3-sensitized photoactive electrode, polyaniline nanobelts, and a Ag counter electrode to form a layered structure. Here, Sb2S3 acts as an absorbing semiconductor, and polyaniline acts as both a hole conductor and light absorber (a hole-conducting dye). Via the optimization that eventually determines the chemical...
The nano-particles, Li3V2(PO4)3 embedded in carbon matrix, are synthesized by a novel two-step procedure based on a sol–gel method. In the two-step process, the carbon-encapsulated trivalent vanadium phosphorus precursors are obtained without adding lithium compound in the first step. Because of carbon matrix, small particle size of Li3V2(PO4)3/C composite is obtained in the second step, which involves...
An ideal proton exchange membrane (PEM) used in fuel cells must facilitate fast proton transport, insulate electron conduction, and exhibit adequate thermal and mechanical stability among others. One of the main issues with PEMs is the degradation of proton conductivity as a consequence of membrane dehydration. In this study, an effective bio-friendly solution is sought through the utilization of...
In this research, a (7,8-dihydroxy-3,3,6-trimethyl-3,4-dihydrodibenzo[b,d]furan-1(2H)-one] (DTDF) multi-walled carbon nanotube modified carbon paste electrode was constructed and used as an excellent electrocatalyst in the oxidation of levodopa (LD) in the presence of acetaminophen (AC) and tryptophan (TRP). In the first part of the work, we synthesized DTDF by electrochemically oxidizing the catechol...
In this paper, yttria-stabilized zirconia (YSZ) electrochemical sensors equipped with a perovskite-type oxide (either LaFeO3 or LaCrO3) sensing electrode (SE) were fabricated and examined in terms of their NO2 sensing properties at high temperatures. A linear correlation was obtained for these devices between the electromotive force (EMF), and the logarithm of the NO2 concentration from 30 to 500 ppm...
In the present investigation, short-lived radioisotopes were applied to study the thermodynamics of ion-isotopic exchange reactions using Tulsion A-23 (nuclear grade) and Indion-454 (non-nuclear grade) anion exchange resins. It was observed during the bromide ion-isotopic exchange reaction using Tulsion A-23 resins that the enthalpy and energy of activation values calculated were 6,831.1 and 9,412...
Electro-osmotic drag of the proton exchange membrane is significant in an operating proton exchange membrane fuel cell because it directly affects water management and fuel cell system. In this paper, a method using a hydrogen pump cell to measure the electro-osmotic drag (EOD) coefficient of Nafion212/SiO2 composite membranes with different SiO2 contents is described. It is found that the EOD coefficient...
Solid polymer blend electrolyte based on polyvinyl chloride (PVC) and polyethylene oxide (PEO) complexed with potassium bromide (KBr) for different weight percent ratios were prepared using solution cast technique. Various experimental techniques such as X-ray diffraction (XRD), AC conductivity, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and transference number measurements...
The novel gel composite, based on the ground of ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate, BMIMPF6) and titanium carbide (TiC) nanoparticles, was used to modify glassy carbon electrode and applied to the electrochemical determination of tryptophan (trp). The physical and electrochemical characterizations of the BMIMPF6-TiC gel modified electrode were studied in detail by scanning...
The present work demonstrates that simultaneous determination of dopamine (DA), piroxicam (PRX), and cefixime (CEF) can be performed on the composite of multiwalled carbon nanotubes (MWCNTs), nickel hydroxide nanoparticles (NHNPs), and MCM-41 modified glassy carbon electrode (MWCNTs-NHNPs-MCM-41/GCE). The effect of the composition of MWCNTs, NHNPs, and MCM-41 for the modification of GCE was tested,...
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