Ángeles Cuán | Universidad Autonoma de Queretaro (original) (raw)
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Universidade Estadual Paulista "Júlio de Mesquita Filho"
Université de Sherbrooke (University of Sherbrooke)
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Papers by Ángeles Cuán
Materials, 2021
The effect of microwave radiation on the hydrothermal synthesis of the double perovskite Sr2FeMoO... more The effect of microwave radiation on the hydrothermal synthesis of the double perovskite Sr2FeMoO6 has been studied based on a comparison of the particle size and structural characteristics of products from both methods. A temperature, pressure, and pH condition screening was performed, and the most representative results of these are herein presented and discussed. Radiation of microwaves in the hydrothermal synthesis method led to a decrease in crystallite size, which is an effect from the reaction temperature. The particle size ranged from 378 to 318 nm when pH was 4.5 and pressure was kept under 40 bars. According to X-ray diffraction (XRD) results coupled with the size-strain plot method, the product obtained by both synthesis methods (with and without microwave radiation) have similar crystal purity. The Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) techniques showed that the morphology and the distribution of metal ions are uniform. The Cur...
Journal of Photochemistry and Photobiology A: Chemistry
Reactive and Functional Polymers, 2011
Along the last decade considerable interest has been focused in deciphering the binding recogniti... more Along the last decade considerable interest has been focused in deciphering the binding recognition process and the heterogeneity nature of binding sites in molecularly imprinted polymers (MIPs). Density Functional Theory (DFT) was employed at B3LYP/6-31+G ÃÃ level of theory, to investigate the intermolecular interactions between the template flavonol and the functional monomer (methacrylic acid). The solvent effect energy stabilization of the monomer and template in different solvents was investigated by using the polarizable continuum method (PCM). The MIP against flavonol prepared using methacrylic acid as functional monomer was then characterized in terms of specific bindings by using Scatchard plot analysis. The rebinding properties were analyzed by equilibrium/rebinding batch experiments using the Langmuir, Bi-Langmuir, Freundlich, Langmuir-Freundlich, Jovanovich, Bi-Jovanovich and Jovanovich-Freundlich isotherms. The imprinted polymer was also characterized by continuous flow experiments, SEM and BET surface area measurements. Parallel studies were carried out with the non-imprinted polymer as control material.
Materials, 2021
The effect of microwave radiation on the hydrothermal synthesis of the double perovskite Sr2FeMoO... more The effect of microwave radiation on the hydrothermal synthesis of the double perovskite Sr2FeMoO6 has been studied based on a comparison of the particle size and structural characteristics of products from both methods. A temperature, pressure, and pH condition screening was performed, and the most representative results of these are herein presented and discussed. Radiation of microwaves in the hydrothermal synthesis method led to a decrease in crystallite size, which is an effect from the reaction temperature. The particle size ranged from 378 to 318 nm when pH was 4.5 and pressure was kept under 40 bars. According to X-ray diffraction (XRD) results coupled with the size-strain plot method, the product obtained by both synthesis methods (with and without microwave radiation) have similar crystal purity. The Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) techniques showed that the morphology and the distribution of metal ions are uniform. The Cur...
Journal of Photochemistry and Photobiology A: Chemistry
Reactive and Functional Polymers, 2011
Along the last decade considerable interest has been focused in deciphering the binding recogniti... more Along the last decade considerable interest has been focused in deciphering the binding recognition process and the heterogeneity nature of binding sites in molecularly imprinted polymers (MIPs). Density Functional Theory (DFT) was employed at B3LYP/6-31+G ÃÃ level of theory, to investigate the intermolecular interactions between the template flavonol and the functional monomer (methacrylic acid). The solvent effect energy stabilization of the monomer and template in different solvents was investigated by using the polarizable continuum method (PCM). The MIP against flavonol prepared using methacrylic acid as functional monomer was then characterized in terms of specific bindings by using Scatchard plot analysis. The rebinding properties were analyzed by equilibrium/rebinding batch experiments using the Langmuir, Bi-Langmuir, Freundlich, Langmuir-Freundlich, Jovanovich, Bi-Jovanovich and Jovanovich-Freundlich isotherms. The imprinted polymer was also characterized by continuous flow experiments, SEM and BET surface area measurements. Parallel studies were carried out with the non-imprinted polymer as control material.