Listar por autor "Peña Rodríguez, G"

By electrochemical anodization to titanium sheets, titanium dioxide nanostructures were sintered for 10 V and 20 V and times of 3 hours and 5 hours. For the electrolytic solution, 0.3 g of ammonium fluoride, 97 mL of ...

The removal of Iris No. 17 fabric dye in water using strontium aluminate powders doped with europium and dysprosium, and the radiation from an ultraviolet C lamp during photocatalysis, is reported. The degradation of the ...

Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal
...
RIVERA BERMUDEZ, INGRID PAOLA | 2021-06-04

By electrochemical anodization to titanium sheets, titanium dioxide nanostructures were sintered for 10 V and 20 V and times of 3 hours and 5 hours. For the electrolytic solution, 0.3 g of ammonium fluoride, 97 mL of ethylene glycol and 3 mL of distilled water were used. The sheets (51 mm × 21 mm × 0.4 mm) were treated using abrasive paper and cleaned with a 1:1 solution of ethanol water by means of ultrasound and dried using hot air. A stirring frequency of 300 rpm was used during anodizing. For the sintering of the titanium dioxide anatase phase, heat treatment was applied at 550 °C for 3 hours by means of an electric muffle, with heating speed of 10 °C/min. The crystallinity index, and the quantification of the sintered phases was carried out by means of X-ray diffraction, while the nanoporosities and their distribution were carried out using imageJ software to the images taken by means of scanning electron microscopy. For the photocatalytic treatment of the methylene blue dye in water, the titanium dioxide nanostructures that reported the highest anatase phase were used, where ultraviolet C radiation from a led lamp was applied for 4 direct hours. The efficiency in the removal of the dye was studied by UV-Vis spectrophotometry, finding the highest degradation of the dye for the wavelength of 644 nm.

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Use of strontium aluminate powders in the photocatalytic removal of dyes present in water
...
Benítez Guerrero, N S | 2021-06-04

The removal of Iris No. 17 fabric dye in water using strontium aluminate powders doped with europium and dysprosium, and the radiation from an ultraviolet C lamp during photocatalysis, is reported. The degradation of the dye was studied by UV-Vis spectrophotometry, for two concentrations of strontium aluminate powder and five of the dye for one hour. The chemical composition and morphology of strontium aluminate powders was studied using X-ray scattered energy spectroscopy, X-ray fluorescence and scanning electron microscopy. The pH, total dissolved solids, and electrical conductivity of the water samples before and after treatment were measured using the Handy-Lab 680 multiparameter. It is evident in the morphology of the strontium aluminate powders a synthesis by reaction in solid state, and a chemical composition by weight of strontium oxide and small amounts of europium and dysprosium. The photocatalytic treatment reports an efficiency of 100% in the removal of the dye for the strontium aluminate powder concentration of 500 mg/L, while for 1000 mg/L an efficiency of 98% was found, likewise for a concentration of 60 mg/L and one hour of ultraviolet radiation a first order reaction kinetics in the degradation of the dye was evidenced.

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Listar por autor "Peña Rodríguez, G"

Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Use of strontium aluminate powders in the photocatalytic removal of dyes present in water

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Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Use of strontium aluminate powders in the photocatalytic removal of dyes present in water

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Listar por autor "Peña Rodríguez, G"

Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal ﻿

Use of strontium aluminate powders in the photocatalytic removal of dyes present in water ﻿

Envíos recientes

Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Use of strontium aluminate powders in the photocatalytic removal of dyes present in water

Portales Institucionales

Electrochemical synthesis of titanium dioxide nanostructures and its application in the in dye photocatalytic removal

Use of strontium aluminate powders in the photocatalytic removal of dyes present in water