A5023909031- Zeolite Catalysis and Synthesis
- Catalytic Processes in Materials Science
- Mesoporous Materials and Catalysis
- Catalysis and Oxidation Reactions
- Nanomaterials for catalytic reactions
- Chemical Synthesis and Characterization
- Astronomical Observations and Instrumentation
- Metal Extraction and Bioleaching
- Catalysis and Hydrodesulfurization Studies
- Sensor Technology and Measurement Systems
- Clay minerals and soil interactions
- Adsorption and biosorption for pollutant removal
- Gold and Silver Nanoparticles Synthesis and Applications
- Extraction and Separation Processes
- Iron oxide chemistry and applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Photocatalysis Techniques
- Nanocluster Synthesis and Applications
- Carbon Dioxide Capture Technologies
- Quantum Dots Synthesis And Properties
- Nanoparticles: synthesis and applications
- TiO2 Photocatalysis and Solar Cells
- Chalcogenide Semiconductor Thin Films
- Advanced Computational Techniques and Applications
- X-ray Diffraction in Crystallography
Universidad Nacional Autónoma de México
2016-2025
Universidad Autónoma de Baja California
2014-2023
Center for Scientific Research and Higher Education at Ensenada
1998-2018
Institut Català de Nanociència i Nanotecnologia
2016
Ensenada Institute of Technology
1997-2016
Benemérita Universidad Autónoma de Puebla
2005-2015
St Petersburg University
2002
Centro de Investigación en Materiales Avanzados
2000
Mexican Institute of Petroleum
1999
Physico-Technical Institute
1996
Clinoptilolite is one of the most common, widespread and abundant zeolites in nature. Its availability, low cost, outstanding ion exchange properties make clinoptilolite an excellent candidate for both direct use various modifications to create new low-cost functional materials sustainable development. Specific applications which already being used include water treatment heavy metal removal, agricultural purposes, storage conversion unwanted gaseous emissions into atmosphere, production...
A series of mono and bimetallic catalysts based on a Fe-Ag mixture deposited mordenite was prepared by ion-exchange evaluated in the catalytic activity test de-NOx reaction presence CO/C3H6. The results showed that most active samples were Fe-containing ones, at high temperatures, co-promoter effect Ag Fe also observed. influence order cation deposition formation their physicochemical properties studied FTIR (Fourier Transform Infrared Spectroscopy) adsorbed NO, XANES (X-ray Absorption...
Metal species supported on zeolites have proven efficient synergistic mechanisms against microorganisms, reducing the overall toxicity. Likewise, deposition of metals by ultrasound is a method that has drawn attention due to its efficiency, low cost, and environmental friendliness. Hence, antimicrobial properties Zinc (Zn) LTA zeolite (NaA) via sono-assisted were explored in this study. Zeolite A modified with Zn ion exchange or precipitation active (Zn(OH)2, ZnO, ZnO2) was evaluated...
A cesium continuum that fills the channels and cavities of zeolite X has been prepared, its structure determined by single-crystal x-ray crystallography. The three-dimensional is cationic to balance negative charge framework. Its valence electrons, only 0.3 per Cs + ion, are widely delocalized over 95 percent ions in crystal. a unit cell formula (Cs 122 ) 86+ contains 13 14 clusters (one supercage) arranged like atoms diamond, with one 2 appendix (in sodalite cavity) cluster.
Here, we report the results of our 1H nuclear magnetic resonance study dynamics water molecules confined in zeolites (mordenite and ZSM-5 structures) with hierarchical porosity (micropores zeolite lamella mesopores formed by amorphous SiO2 inter-lamellar space). (NMR) spectra show that experiences complex behavior within temperature range from 173 to 298 K. The dependence spin-lattice relaxation evidences presence three processes different activation energies: freezing (about 30 kJ/mol),...
The electronic and optical properties of a composite created by introducing magnetite cluster into NaA zeolite have been investigated in this work using DFT calculations. results obtained indicate that the are enhanced because cluster. However, exhibited outside differ from those it presents when is part composite. It noteworthy exhibits magnetic half-semiconductor strong response within visible ultraviolet regions spectrum.
A series of novel TiO 2 /2D mordenite nanocomposites were synthetized by the introduction titanium tetraethoxide (TEOT) into interlamellar space 2D mordenite, its subsequent hydrolysis in water or a solution 70% ethanol for 6, 12, and 24 h, calcination. The resulting materials studied set complementary characterization techniques, including XRD, SEM-EDX, TGA, N sorption, NMR, XPS UV–vis spectrometry. It was observed that treatment preserves ordered layered structure because TEOT is slowed...
Work is reported on optical antennas of complex molecules. Optical a nanometric particle are widely considered for light relays in various on-chip applications. An appealing candidate an antenna molecule, example, huge cell containing few hundred atoms. The properties, such as the radiation patterns, may be optimized. optimization includes design and synthesis contents structures participating atoms their positions. A convenient method to simulate solve local field at sites atoms,...
Nickel sulfide catalysts obtained by homogeneous precipitation were prepared varying the homogenization time and sulfiding temperature. Structural characterization studies transmission electron microscopy x-ray diffraction showed formation of various metastable crystalline phases at low temperatures (Ni3S2, Ni3S4, Ni7S6, Ni9S8, NiS2, NiS1.03, NiS), depending on preparation conditions. NiS millerite appears to be main phase for samples after 4 h homogenization, changing NiS1.03 36 h....
In this study, nanoparticles of five photocatalytic systems based on pure zinc oxide and with rare earths ions M-ZnO (M = La3+, Ce3+, Pr3+ or Nd3+) calcined at 500 °C 700 were synthesized investigated as potential photocatalysts for the removal dyes. The addition earth causes a decrease in bandgap ZnO; therefore, it can be well used to improve properties. activity was evaluated by degradation Rhodamine B presence H2O2 under ultraviolet illumination. results indicate that all show good dye...