A simple procedure was developed to prepare a glassy carbon electrode (GCE) modified with single-walled nanotube/zinc oxide (SWCNT/ZnO). The composites were immobilized on the GCE by mechanical attachment. surface gently rubbed filter paper supporting SWCNT/ZnO composites. Cyclic voltammetry study of indicated that oxidation potential shifted towards lower approximately 240 mV and peak current enhanced 2.0 fold in comparison bare GCE. resulting also absence well-defined redox couple implying...

This article describes chemically modified polyaniline and graphene (PANI/GP) composite nanofibers prepared by self-assembly process using oxidative polymerization of aniline monomer in the presence a solution containing poly(methyl vinyl ether-alt-maleic acid) (PMVEA). Characterization was carried out Fourier transform infrared (FTIR) Raman spectroscopy, transmission electron microscopy (TEM) scanning (SEM). SEM images revealed size PANI ranged from 90 to 360 nm diameter greatly influenced...

Conducting nanofibers composed of poly(vinyl alcohol) (PVA), graphene oxide (GO) and poly(3,4-ethylenedioxythiophene) (PEDOT) were fabricated <italic>via</italic> a combined method using electrospinning electropolymerization techniques.

Abstract This study investigated the effect of ionic crosslinking on mechanical, barrier, and optical properties chitosan (CS) CS/graphene oxide (CSGO) composite films using trisodium citrate (CIT) sodium tripolyphosphate (TPP) solutions different concentrations (0.5, 1.0. 2.0, 3.0% w/v). Successful was confirmed by Fourier‐transform infrared spectroscopy. The hydrophilicity light transmittance decreased significantly ( p &lt; 0.05) with increase in concentration both agents. CS crosslinked...

A very sensitive electrochemical sensor has been developed by modification of glassy carbon electrode (GCE) with graphene oxide (GO). The behavior paracetamol was studied at GO/GCE using cyclic voltammetry (CV) and square-wave voltammetric techniques (SWV). well defined oxidation peak observed in 0.1 M KH2PO4 electrolyte solution solid phase voltammetry. Under the CV techniques, it appears that catalytic effect on shows higher current response as compared to bare GCE. Observed potential...

Abstract A simple and highly sensitive electrochemical sensor COOH−C4 derived from dicarboxyl‐calix[4]arene modified on a screen printed gold electrode (Au) was developed for the determination of lead ions in water samples. 3‐mercaptopropionic acid (MPA) monolayer used as template surface modification with dicarboxyl‐calixarene. The electrodes were surface‐characterized using Fourier Transform infrared spectroscopy (FTIR). data obtained proved confirmation each stage modification. analyses...

The reduction of graphene oxide (rGO) utilizing green methods such as plants has attracted much attention due to its productivity, eco—friendly features, and cost effectiveness. In the present study, reflux method was employed synthesize Clinacanthus nutans (C. nutans) leaf extract mediated rGO using a simple approach. synthesized characterized various spectroscopic microscopic techniques. UV-Vis spectrum demonstrated absorption peak (270 nm) at distinct locations, while FTIR analysis that...

Biosurfactants are becoming an important alternative to chemical surfactants in almost every sector the modern industry because of their improved properties compared counterparts. The aim this study is isolate and identify bacterial strain from different environment conditions with capacity produce rhamnolipid-biosurfactants when grown on blue agar plate (BAP) selective medium. Five strains were screened out using combination modified drop-collapse test, oil spreading emulsification index...

The electrocatalytic study of ascorbic acid using single-walled carbon nanotube/tungsten oxide (SWCNT/WO3) modified glassy electrode prepared by mechanical attachment was conducted. oxidation peaks obtained indicate that the SWCNT/WO3-modified has good electrochemical behaviour in terms sensitivity. a SWCNT/WO3 composite on (GCE) surface enhanced oxidative current when compared to WO3-modified and bare GCE. peak considerably 2.5 times with about 230 mV shift towards lower potential used comparison

A rapid, simple, and sensitive method for the electrochemical determination of paracetamol was developed. single-walled carbon nanotube/nickel (SWCNT/Ni) nanocomposite prepared immobilized on a glassy electrode (GCE) surface via mechanical attachment. This paper reports voltammetry study effect concentration, scan rate, pH, temperature at SWCNT/Ni-modified in paracetamol. The characterization SWCNT/Ni/GCE performed by cyclic voltammetry. Variable pressure scanning electron microscopy (VPSEM)...

Lipase has been gaining attention as the recognition element in electrochemical biosensors. immobilization is important to maintain its stability while providing excellent conductivity. In this study, a lipase biosensor immobilized on copper-centred metal-organic framework integrated with reduced graphene oxide (lipase/rGO/Cu-MOF) was synthesized by facile method at room temperature. Response surface methodology (RSM) via central composite design (CCD) used optimize synthesis parameters,...

This work introduces a simple and environmental friendly approach for synthesizing reduced graphene oxide using tangerine peel extract as non-toxic alternative to toxic compounds. Various microscopic spectroscopic techniques were used characterize the synthesized oxide. The UV-visible spectra of (287 nm) at specific wavelengths FTIR analysis showed that oxygen groups in reduced. Raman confirmed small increase intensity ratio D-band G-band. X-ray diffraction presence 2θ angle, 28.36º peak...

The electrochemical behavior when the liquid–liquid interface was modified by commercially available, microporous silicon nitride membrane, achieved using cyclic voltammetry with tetramethyl ammonium. transfer characteristics of ionizable drug diclofenac ( DCF − ), as an anti-inflammatory, anti-rheumatic, antipyretic, and analgesic treatment in common use biomedical applications, were also investigated across nitride-modified liquid interface. Thus, some thermodynamic variables for , such...

The melt-mixing method was used to obtain nanocomposites of ethylene vinyl acetate copolymer (EVA) with 1, 3 or 5wt% hydrophilic zinc oxide (ZnO) nanoparticles. contact angle, barrier and antimicrobial properties the obtained composites were investigated. characterized by better properties, as evidenced by, respectively, a smaller angle lower water vapor permeability absorption compared EVA, which can be explained formation hydrogen bonds between EVA ZnO. In addition, greater bactericidal...

The physical, chemical and electrochemical properties of poly(3,4-ethylenedioxythiophene) /zinc oxide (PEDOT/ZnO) thin film electrode that were prepared electrochemically studied. PEDOT was potentiostatically deposited on the hexagonal flake-like ZnO-covered ITO glass substrate by applying three different potentials (1.0 V, 1.25 V 1.5 V) where under these circumstances, effect varying electropolymerization optical bandgap each PEDOT/ZnO composites noticed to be within range 3.40 eV 3.45...

A chiral, biocompatible, conducting material comprising collagen I, silica gel and ferrocene was found to modify invert, the chiral selectivity of D-glucose oxidase L-lactate oxidase. This result may have implications as matrices are widely used in drug delivery, biosensing tissue engineering. Investigations were carried out using electrochemical methods, FTIR spectroscopy circular dichroism.

A straightforward approach that uses Clinacanthus nutans leaf extract as a bio-reduction agent has been reported to anchor silver nanoparticles onto graphene oxide (rGO-Ag). The nanocomposite was characterized by using ultraviolet-visible spectroscopy, Fourier transform infrared field emission scanning electron microscopy with energy-dispersive X-ray and diffraction. qualitative colour transition from yellowish dark brown confirmed the biosynthesis of rGO-Ag showed surface plasmon resonance...