Listar Materiales Poliméricos - GIMAPOL por autor "59c79dcabf70a4109c23e5e3962fd024"

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Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system

Raba, Angela; Barba, Jose; Rincón Joya, Miryam (International Journal Of Applied Ceramic TechnologyBogota , Colombia, 2018-05-21)

In order to improve the behavior Niobium pentoxide on oxidation-reductionreactions to degrade organic compounds in aqueous solutions, we developed the synthesis of Niobium pentoxide with the metal doping agents: manganese,iron, ...
Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature

Raba, Angela; Rincón Joya, Miryam; Barba, Jose (Indian Journal Of Pure '&' Applied PhysicsNueva Delhi , India, 2019)

In this work a study of the effect of the synthesis conditions on the vibratory and particle size properties in the cupric oxide (CuO) has been presented. The synthesis has been carried out by the polymeric precursor method ...

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Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system
...
Raba, Angela | 2018-05-21

In order to improve the behavior Niobium pentoxide on oxidation-reductionreactions to degrade organic compounds in aqueous solutions, we developed the synthesis of Niobium pentoxide with the metal doping agents: manganese,iron, and nickel (Nb2−xMxO5), respectively, and analyzing its effects on the structural and vibrational properties. The synthesis of the Nb2−xMxO5 (M = Mn, Fe, and Ni; x = 0.02 and 0.05) was performed according the Pechini method, but before the annealing, the samples were submitted to Thermogravimetric analysis study showing better pre-calcination annealing temperatures at 500 and 700°C for the materials. Then, we performed the crystal structural analysis by X-ray Diffraction, obtaining crystallite sizes between 15 and 47 nm, the accurate size analysis was calculated by Scherrer equation. Structural analysis was also performed by IR spectroscopy to evaluate the vibrational modes of synthetized samples. The dopping effects were evaluated by UV-Vis spectrophotometry through the energy band gap values, showing that doped samples with manganese and iron had lower values than undoped, except the sample doped with nickel. However, samples doped with iron at 2.5% showed better photocatalytic performance.

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Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature
...
Raba, Angela | 2019

In this work a study of the effect of the synthesis conditions on the vibratory and particle size properties in the cupric oxide (CuO) has been presented. The synthesis has been carried out by the polymeric precursor method without modifying the PH in the process, this being a low cost method. The samples obtained have been subjected to several calcination temperatures, 450 °C, 550 °C, 650 °C and 800 °C. In particle analysis by X-ray, scanning electron microscopy (SEM) and statistical it has been observed that for very low or very high calcination temperatures the particle size increases, finding 650 °C as the best calcination temperature. In the Raman spectra, the Ag and Bg vibration have been presented in the samples, with the peaks being narrower for the temperature of 450 °C.

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Listar Materiales Poliméricos - GIMAPOL por autor "59c79dcabf70a4109c23e5e3962fd024"

Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system

Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature

Envíos recientes

Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system

Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature

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Listar Materiales Poliméricos - GIMAPOL por autor "59c79dcabf70a4109c23e5e3962fd024"

Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system ﻿

Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature ﻿

Envíos recientes

Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system

Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature

Portales Institucionales

Effects of metal doping agent on the properties of Nb2−xMxO5 (M = Mn, Fe, and Ni) system

Vibrational Raman modes and particle size analysis of cupric oxide with calcination temperature