A5057259218- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Advanced Photocatalysis Techniques
- Catalysis and Oxidation Reactions
- TiO2 Photocatalysis and Solar Cells
- Nanomaterials for catalytic reactions
- Transition Metal Oxide Nanomaterials
- Mesoporous Materials and Catalysis
- Electrocatalysts for Energy Conversion
- Gas Sensing Nanomaterials and Sensors
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- ZnO doping and properties
- Catalysis for Biomass Conversion
- Zeolite Catalysis and Synthesis
- Layered Double Hydroxides Synthesis and Applications
- Chemical Synthesis and Characterization
- Polyoxometalates: Synthesis and Applications
- Catalysts for Methane Reforming
- Metal-Organic Frameworks: Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Electronic and Structural Properties of Oxides
- Pigment Synthesis and Properties
- Biodiesel Production and Applications
- Iron oxide chemistry and applications
Mexican Institute of Petroleum
2015-2024
Universidad Autónoma Metropolitana
2002-2010
Instituto Politécnico Nacional
2007
Tin sulfide thin films, typically 350 nm thick, were deposited on -coated transparent conductive oxide glass substrates by pulse electrodeposition. The applied potentials and vs saturated calomel electrode with on/off durations of 10 s. films crystallized in the orthorhombic structure corresponding to SnS (herzenbergite), grain size varying range from a few nanometers more than 100 nm. X-ray diffraction analysis shows an average 12 nm; however, scanning electron microscopy transmission...
The evolution of MgAl layered double hydroxides (LDHs), prepared by the sol−gel method, throughout synthesis−crystallization−calcination−reconstruction process is thoroughly studied and compared to a coprecipitated analogue. X-ray diffraction transmission electron microscopy provide useful information about crystallinity morphology samples. It was found that crystal sizes do not necessarily decrease after calcination−reconstruction. Furthermore, aluminum coordination 27Al MAS nuclear...
Titania nanotubes were obtained by an alkaline hydrothermal treatment of anatase at 373 K followed washing with HCl aqueous solution. Samples dried and calcined 573 673 K. The solids characterized X-ray diffraction, Raman spectroscopy, HRTEM, nitrogen physisorption, FTIR adsorbed CO. After calcination K, the nanotubular morphology was well-preserved, although initial transformation to observed. interlayer space between walls collapsed, resulting in domains phase within walls. nanostructure...
WOx/TiO2 catalysts were synthesized by impregnating aqueous (NH4)2WO4 on hydrous titania nanotubes. The materials annealed in air at 500 °C and characterized X-ray diffraction (XRD), Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), high-angle annular dark-field scanning (HAADF-STEM), photoelectron spectroscopy (XPS); their catalytic activity was evaluated the oxidation reaction of dibenzothiophene (DBT). After annealing °C, structure support transformed from...
Recently there is an increased interest in developing magnetic semiconductors due to their promising applications spintronics. The can be made ferromagnetic by doping with transition-metal ions. In this paper, the results of our studies using x-ray diffraction (XRD) and IR Raman spectroscopic techniques on effect Fe structural properties SnO2 are presented. XRD showed that affects structure lattice constants decrease as concentration increases, reaches a minimum, again increases. doped...
WO3−ZrO2 catalysts were synthesized by precipitating the aqueous solutions of zirconium oxynitrate and ammonium metatungstate with hydroxide. The white slurry precipitate was treated under three different conditions. In as-made materials, amorphous phase formed in aged refluxed samples, while well-crystallized tetragonal monoclinic phases obtained hydrothermally sample. real amount tungsten loaded samples similar for independently treatments; however, surface atomic density annealed varied...
Silver nanoparticles were homogenously dispersed on titania nanotubes (NT), which prepared by alkali hydrothermal methodology and dried at 373 K. Ag+ incorporation was done impregnative ion exchange of aqueous silver nitrate onto NT. First, ions incorporate into the layers nanotube walls, then, upon heat treatment under N2 573 673 K, they migrate change Ag2O Ag0 nanoparticles, respectively. In both cases, Ag are highly dispersed, decorating in a polka-dot pattern. The particle size...