A5063002478- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Catalysis and Oxidation Reactions
- Zeolite Catalysis and Synthesis
- Nanoparticle-Based Drug Delivery
- Advanced Photocatalysis Techniques
- Catalysis and Hydrodesulfurization Studies
- Polyoxometalates: Synthesis and Applications
- Layered Double Hydroxides Synthesis and Applications
- TiO2 Photocatalysis and Solar Cells
- Magnesium Oxide Properties and Applications
- Chemical Synthesis and Characterization
- Bone Tissue Engineering Materials
- Nanomaterials for catalytic reactions
- Glass properties and applications
- Advanced Nanomaterials in Catalysis
- Aerogels and thermal insulation
- Nanoparticles: synthesis and applications
- Thermal and Kinetic Analysis
- Luminescence Properties of Advanced Materials
- Covalent Organic Framework Applications
- Gas Sensing Nanomaterials and Sensors
- Nuclear materials and radiation effects
- Wound Healing and Treatments
- Ferroelectric and Piezoelectric Materials
Universidad Autónoma Metropolitana
2016-2025
Universidad Nacional de Colombia
2024
Tulane University
2010-2020
Universidad Nacional Autónoma de México
1993-2018
Instituto Nacional de Neurología y Neurocirugía
2006-2016
Instituto Nacional de Investigaciones Nucleares
2011
Universidad Metropolitana
2010
King's College London
2009
University of Havana
2008
Mexican Institute of Petroleum
1997-2006
Nanocrystalline alumina was synthesized by using the sol−gel method with aluminum sec-butoxide as precursor. FTIR, TG, XRD, and crystalline structure refinement were used to analyze phase transformations their structures. When samples annealed at 200 °C, they had two nanocrystalline phases γ-boehmite γ*-boehmite, which same but different lattice parameters defect numbers in structure. After sample annealing above 400 γ*-boehmite transformed into γ-Al2O3 θ-Al2O3. The γ-alumina contained...
Iron-doped titania photocatalysts with different iron contents were prepared by using a sol−gel method in acidic media. The crystalline structures of the various phases calcined at temperatures ranging from 70 to 800 °C studied Rietveld technique combination XRD experiments. average crystallite size phases, lattice cell parameters, phase concentrations, and titanium cationic defects samples quantitatively determined. Both content calcination temperature strongly affected transformation...
Hydrotalcites, which are anionic clays, have been synthesized by the sol−gel technique from magnesium ethoxide, aluminum tri-sec-butoxide, and acetylacetonate. Initially a colloidal solution is obtained gels thermally stabilized. The local average structure studied comparing electron microscopy results with XRD patterns. One of main features these materials high specific area (around 150 m2/g), if compared natural hydrotalcites areas.
Fe/TiO2 materials at 1 wt% Fe content have been prepared by the addition of aqueous solutions FeCl2 to titanium n-tetrabutoxide using hydrochloric acid (pH 3) as a hydrolysis catalyst. The obtained gel was thermally treated 200, 400, 600 and 800 °C. Characterization performed FTIR, UV–Vis, Mössbauer X-ray powder diffraction. FTIR spectra calcined samples showed presence highly hydroxylated TiO2. XRD patterns show coexistance brookite, anatase rutile TiO2 phases in up In sample °C only phase...