The work demonstrates the development of an electrochemical sensor for quantification Chloramphenicol (CA) using pencil graphite electrode (PGE) modified with Gadolinium tungstate nano flakes and carbon fibers composite (PGE/GWNfs/CNFs). was further characterized confirmed by X-ray diffraction (XRD), energy-dispersive spectroscopy, transmission electron microscopy analysis. prepared GWNfs/CNFs ...

background: high concentration of salt makes biological treatment impossible due to bacterial plasmolysis. the present research studies the process of electrochemical oxidation efficiency and optimal levels as important factors affecting ph, salt concentration, reaction time and applied voltage. methods: the sample included graphite electrodes with specifications of 2.5 cm diameter and 15 cm he...

Development of an electrochemical DNA biosensor based on a human interleukine-2 (IL-2) gene probe, using a pencil graphite electrode (PGE) as transducer and methylene blue (MB) as electroactive label is described. The sensor relies on the immobilization of a 20-mer single stranded oligonucleotide probe (hIL-2) related to the IL-2 gene on the electrode. The hybridization between the probe and it...

In this study, a wall-jet flow cell with a GRC (graphite reinforced by carbon) electrode was designed for the amperometric detection of phenol and chlorophenols in liquid chromatography. The voltammetric responses of these analytes at the GRC electrodes are very similar to those at conventional glassy carbon electrodes. As the GRC electrodes were made of the same materials as commercially avail...

Kapok fiber is a light, cottony, pale yellow to brown obtained from fruit. The characterized by large, hollow lumen and generally hydrophobic due its waxy surface. difficult spun into thread it commonly used as filling in mattresses, pillows, stuffed toys upholstery. Compared other natural fiber, kapok’s use limited application. However, now gaining attention the scientific community an importa...

Hollow polyhedral graphite particles with 200~400 nm in diameter have been synthesized by heating oxalic acid, ferrocene and metallic magnesium at 580 °C, typically forming diamond-like octahedral structure. Combined with SEM, TEM, SAED patterns, and Raman spectroscopy, it was shown that the surface of graphite polyhedrons is composed of approximately 30-40 graphene shells; the fouror sixfold s...

DOI: 10.1002/aenm.201400753 techniques. This is due to the heavy weight of the metal current collectors and the use of binders. [ 1,2 ] To improve the overall specifi c capacity of an electrode, high capacity active materials and light-weight current collectors should be used. With ten times higher theoretical capacity, abundance, non-toxicity, and low cost, Si has attracted extensive attention...