Papers by Keyword: Silver Chloride

Abstract: Influence of silver chloride synthesis conditions on its heat of sublimation after ultra-violet irradiation was explored. It was determined that silver chloride synthesized in excess of silver ions after irradiation was characterized by heat of sublimation about 6813 J/g, which meant that the original value increased in ~ 1.8 times. At the same time silver chloride synthesized in excess of chloride ions was characterized by decrease in value of heat of sublimation by ~ 2 times. Growth of heat of sublimation of silver chloride with excess of silver ions is connected with energy expenditure on sublimation due to decrease in proportion of surface which is not covered with silver. Reduction of heat of sublimation of silver chloride with excess of chloride ions is explained by absence of silver solid surface film and catalytic effect of silver klasters formed during the process of irradiation.

Abstract: Silver chloride (AgCl) nanoparticles with the average size of about 45 nm have successfully been doped onto the iron oxide-silica coreshell surfaces by a simple room temperature wet chemistry method under ambient atmosphere. The Stöber process has been used to make the coreshell structure, followed by adsorption of Ag⁺ species on silica surface prior to the addition of hydrochloric acid (HCl) and polyvinylpyrrolidone (PVP). The concentration of HCl acid that was used to induce the growth of AgCl particles was varied from 0.12 mM to 12x10³ mM of concentrations. Results showed that at a very high concentration of HCl (12x10³ mM), large AgCl agglomerates (0.3-0.6 microns) with irregular cubic-like morphology were obtained while at a very low, 12 mM HCl concentration, 30-50nm AgCl particles having a uniform cubic morphology were observed. Concentrations below 12 mM result in irregular and nearly spherical morphology of AgCl particles with a smaller size (28-60 nm). UV-Vis absorption of the composite materials showed absorption in the visible wavelength indicating that Ag nanoclusters might coexist together with AgCl particles.

Abstract: TiO₂/SBA-15 and AgCl loaded on TiO₂/SBA-15(AgCl-TiO₂/SBA-15) composites were synthesized by a facile method. All products were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and N₂ adsorption-desorption analysis. Photocatalytic activities of the composites were assessed by the photocatalytic decomposition of methyl orange (MO). The results indicated that TiO₂ or TiO₂-AgCl existed in the matrix SBA-15, which reduced the specific surface area, pore volume and pore size of the matrix. The photocatalytic performances of TiO₂/SBA-15 were higher than that of pure TiO₂, and the resultant AgCl-TiO₂/SBA-15 composites showed much higher photocatalytic performances than TiO₂/SBA-15.

Abstract: A novel photocatalyst, AgCl loaded mesoporous graphitic carbon nitride (mpg-C₃N₄) in which silver chloride nanoparticles were introduced into the mesopores carbon nitride, was prepared by a dip-coating procedure. The as-prepared photocatalyst was characterized by X-ray diffraction, transmission electron microscopy, UV-visible spectrophotometry. The novel photocatalyst manifested a better photocatalytic activity than that of pure mpg-C₃N₄ for degradation of methyl orange.

Abstract: This paper presents a method to fabricate textile structural electrodes from material preparation to electrode structure design and testing. Silver/Silver Chloride (Ag/AgCl) was assumed to be the best electrode material system for acquisition of biopotential signals. A AgCl coating has been grown on silver (Ag) coated multilament yarn to form Ag/AgCl combination using constant voltage electrolytic deposition in 0.9% wt sodium chloride bath. The AgCl thickness could be controlled by varying processing time (t) and voltage (V). Surface morphology of the treated fibres were studied by scanning electron microscopy (SEM) which revealed that AgCl grain size became bigger and denser as increased processing time and voltage. The impedance of the treated fibre was analyzed by electrochemical impedance spectroscopy (EIS) analysis from 0.1H z to 1000H z which shown that impedance also increased with processing time and voltage. The prepared Ag/AgCl multilament yarn was fabricated into wearable electrode using embroidery technique. ECG testing confirmed that the electrodes made from treated fibre can acquire high quality signal.