CuO thin films were obtained by DC Sputtering varying the deposit time: 10, 20 and 30 min with the thickness of 60, 120 and 180 nm, respectively. These films were used photocatalysts in two different photocatalytic processes: hydrogen production and CO2 photoreduction under simulated sunlight. The film with 120 nm of thickness generated the highest amount of hydrogen (24 μmol) of the films tested. Furthermore, the ellipsometry results showed that this film absorbs the simulated light in the UV-to-IR region...Artículo Completo
KBiO3/g-C3N4 composites were prepared under microwave irradiation to different weight ratio of KBiO3 (5, 10, 20, 30, 40, 50, 60, 70 80, 90 %wt) using a Mars-6 for 30 min at 100 W...Artículo Completo
TiO2 nanorods were prepare by hydrothermal method over TiO2 seed layers deposited by DC Sputtering. From the XRD structural characterization, it has been stated that TiO2 seed layer present mainly the anatase phase with some contributions of rutile phase, while for TiO2 nanorods are presented the rutile phase...Artículo Completo
BiVO4 film has been fabricated using a screen printing process on common glass. XRD analysis indicated that the film after calcination at 400 °C for 2 h appear to be the optimal conditions...Artículo Completo
KBiO3 was synthesized by three methods: chemical substitution, hydrothermal and sonochemical. All reaction products were analyzed by means of X-ray powder diffraction and reveals that KBiO3 presents a cubic structure...Artículo Completo
In this work, the WO3/g-C3N4 heterojunction system has been prepared through a sonochemical process at 37 kHz. The composites were characterized by powder X-ray diffraction, diffuse reflectance and Fourier transform infrared spectroscopies, scanning electron microscopy and nitrogen adsorption-desorption measurements. The photocatalytic activity of the coupled system was evaluated by the photodegradation of the Orange G dye and the ciprofloxacin antibiotic under solar-like irradiation conditions....Artículo Completo
Novel Fe-impregnated BiVO4 was synthetized by a sonochemistry method, then the Fe-impregnation was prepared through an easy and low-cost method by the directly hydrolyzes iron salt onto BiVO4 nanoparticles. Scanning electron microscope equipped with an energy dispersive spectrometer analysis indicated the presence of Fe on the impregnated BiVO4. Half-time of Fe-BiVO4 (1%) sample was 10 times greater than BiVO4 pure in the ciprofloxacin degradation by a dual effect process under UV-Vis light irradiation...Artículo completo
TiO2 nanorods were prepared by hydrothermal method over TiO2 seed layers deposited by DC Sputtering. From the XRD structural characterization, it has been stated that TiO2 seed layer present mainly the anatase phase with some contributions of rutile phase, while for TiO2 nanorods, the rutile phase is present. The thin film thickness were measured using a profilometer, resulting in a thickness of 310 nm for the seed layer and ∼400 nm for TiO2 nanorods. ...Articulo Completo
In this work, visible-active BaBiO3 perovskite photocatalysts were prepared by solid state and hydrothermal methods. The physicochemical characterization of the materials was carried out by XRD, SEM, UV–vis, PL and EIS analysis. It was found that the materials exhibit a base centered monoclinic structure with morphology of dense irregular particles and an absorption edge near to 620nm (∼2eV) in the visible region...Artículo completo
Limited visible light absorption, slow charge transference, and high recombination are some of the main problems associated with low efficiency in photocatalytic processes. For these reasons, in the present work, we develope novel zirconate–FeS2 heterostructured photocatalysts with improved visible light harvesting, effective charge separation and high photocatalytic water splitting performance.Artículo completo
In the present work, we report the electrophoretic deposition of lead molybdate nanoparticles which were synthesized by an ultrasonic-assisted method using Pb(NO3)2 and H2MoO4 as precursors...Artículo completo
Degradación fotocatalítica de una solución acuosa de tetraciclina con las fases sintetizadas mediante el método de solvo-combustión.
This work reports the synthesis of a variety of materials with an ilmenite-type structure MTiO3 formula, where M= Fe, Co, and Ni, these materials were synthesized by the method of solvo-combustion, a simple and rapid method...Artículo completo
Novel visible light-driven PbMoO4/g-C3N4 hybrid composites were synthesized with loadings 0, 20, 50, 80 and 100 wt.% of PbMoO4 by sonochemical method. The PbMoO4/g-C3N4 hybrid composites were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS)...Artículo completo
Mecanismo de reacción para generación de H2 fotocatalítico.
Copper oxides are considered efficient photocatalysts for H2 generation. In addition, due to their interesting properties such as surface plasmon resonance, they are applied in photo-induced reactions. In heterogeneous photocatalysis, CuO and Cu2O are the main oxides...Artículo completo
Variación del espectro de absorción UV–vis durante la degradación fotocatalítica de CPFX (10 mg L−1) durante 4 h de reacción.
CaBi6O10 nanoplates were synthesized by a sonochemical method using a high-power ultrasonic processor. Also, the CaBi6O10 was synthesized by an impregnation-calcination method in order to compare the effect of the synthesis method on the photocatalytic activity of the photocatalyst...Artículo completo
The graphite-like C3N4 was prepared by means the polycondensation of melamine at 500 C for 4 h. The polymeric photocatalyst was characterized by several techniques such as X-ray powder diffraction (XRD), UV–vis diffuse reflectance spectroscopy (DRS) and scanning electron microscopy (SEM)...Artículo completo
Representación esquemática de la formación de partículas de Bi2O3 expuestas por 1, 2 o 3 h a radiación ultrasonido.
Bi2O3 nanoplates were synthesized by an ultrasound-assisted precipitation method in aqueous solution with different times of exposure to ultrasound radiation. The formation of Bi2O3 oxide with a monoclinic structure was confirmed by X-ray powder diffraction (XRD)...Artículo completo
Degradación fotocatalítica de rhB (5mg.L-1) por WO3 sintetizado vía microondas asistido por hidrotermal bajo diferentes condiciones experimentales.
In the present work WO3 nanoparticles by two synthesis methods were prepared: microwave assisted hydrothermal and ultrasound synthesis method assisted with CTAB. The nanoparticles were characterized by XRD, SEM, UV-vis and surface area by BET method...Artículo completo
Variación del espectro de absorción UV-Vis de una solución de rodamina B (c) a 5, 30, y 20 mg l−1.
BiVO4 with monoclinic-type structure were successfully synthesized by microwave-assisted hydrothermal method (BiMH) and hydrothermal reaction (BiH500) in aqueous medium. The materials were characterized by X-ray diffraction, scanning electron microscopy, Barrett–Emmett–Teller technique...Artículo completo
Mechanismo básico de división de agua sobre el semiconductor SrZrO3.
In this study, it was synthesized strontium zirconate (SrZrO3) powders using three methods: a traditional solid-state reaction, molten salts and ultrasound-assisted synthesis. The structural, morphological, optical and textural properties of the prepared powders were investigated using...Artículo completo
WO3 2D nanostructures have been prepared by ultrasound synthesis method assisted with CTAB using different molar ratios. The formation of monoclinic crystal structure of WO3 was confirmed by X-ray powder diffraction (XRD)....Artículo completo
Significant attention has been paid on the photocatalytic production of hydrogen from water splitting by using semiconductor materials. The NaTaO3 phase has been studied for this purpose due to its high potential to generate charge carriers by absorbing the photons energy...Artículo completo
Degradación fotocatalítica de rhB (5 mg L−1) bajo irradiación UV–vis; el fotocatalizador fue WO3 sintetizado bajo diferentes condiciones experimentales.
WO3 nanoparticles with hexagonal and monoclinic structures were synthesized via a microwave-assisted hydrothermal process without the use of any additives in which the microwave hydrothermal reaction time was 30 or 60 min and was followed by different thermal treatments...Artículo completo
Ilustración esquemática del proceso de formación de estructuras de MoO3 y Sm2O3.
This paper reports the development of a solvo-combustion synthesis route using acetylacetone as the novel fuel and ethanol as the solvent, with water excluded from the system. MoO3 and Sm2O3 materials synthesized by this route were characterized by various physicochemical techniques...Artículo completo
Tungsten(VI) oxide (WO3) powders have been synthesized from a precursor material prepared via a simple precipitation method in ethanol medium followed by thermal treatments at 500 and 700 °C. Structural characterization by X-ray Rietveld refinement...Artículo completo
WO3 nanoparticles were synthesized by citric acid-assisted precipitation method using a 1:1.5 molar ratio of ammonium paratungstate hydrate (H42N10O42W12·xH2O):citric acid (C6H8O7). The formation of monoclinic crystal structure of WO3 at different temperatures was confirmed by...Artículo completo
WO3 nanoparticles were synthesized by a precipitation method in presence of urea at different calcination temperatures. The characterization of the WO3 samples was carried out by X-ray powder diffraction (XRD)...Artículo completo
WO3 nanoparticles were synthesized by the precipitation method varying the time employed in the formation of their precursor in aqueous media and the calcination temperature. The WO3 crystallization process and morphology of the synthesized samples were ...Artículo completo
Pruebas fotocatalíticas a diferentes concentraciones.
The photocatalytic activity of the semiconductor oxide Bi2MoO6 by visible light in the degradation of Rhodamine B in aqueous solution was evaluated in this research. The Bi2MoO6 was synthesized by solid state in the two crystaline forms...Artículo completo