A5077444814- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
- Catalysis and Oxidation Reactions
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Mesoporous Materials and Catalysis
- Nanomaterials for catalytic reactions
- Adsorption and biosorption for pollutant removal
- Catalysis and Hydrodesulfurization Studies
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Phytochemistry and Biological Activities
- X-ray Diffraction in Crystallography
- Environmental remediation with nanomaterials
- Zeolite Catalysis and Synthesis
- Plant Diversity and Evolution
- Forest Management and Policy
- Advanced Photocatalysis Techniques
- Plant and animal studies
- Thermal and Kinetic Analysis
- Soil Carbon and Nitrogen Dynamics
- Forest Ecology and Biodiversity Studies
- Crystallization and Solubility Studies
University of St Andrews
2014-2024
University of Massachusetts Chan Medical School
2017
St. Andrews University
2009-2015
Consejo Nacional de Investigaciones Científicas y Técnicas
2008-2010
Universidade de São Paulo
2010
Universidad Rey Juan Carlos
2009
Universidad Autónoma de Madrid
2009
Newcastle University
2009
Los Alamos National Laboratory
2008
University of Dundee
2003-2008
The textural and structural properties of high specific surface area (HS) CexZr1-xO2 mixed oxides (CeZrMO) their modification upon thermal aging have been investigated. Results from BET determination complete porosity analysis, as well high-resolution electron microscopy, XRD, Raman FTIR spectroscopies are presented. Some relationships between the molar composition binary systems In addition, it has possible to propose an explanation for features (solid-solution structures phase segregation)...
Nonsense-mediated mRNA decay (NMD) plays an important role in eukaryotic gene expression, yet the scope and defining features of NMD-targeted transcripts remain elusive. To address these issues, we reevaluated genome-wide expression annotated yeast cells harboring deletions UPF1, UPF2, or UPF3 genes. Our new RNA-seq analyses confirm previous results microarray studies, but also uncover hundreds NMD-regulated that had escaped detection, including many intron-containing pre-mRNAs several...
Herein, an ordered mesoporous carbon (OMC) material was prepared using a metal and halogen free method, its adsorptive potential for the cationic dye, 'Methylene Blue' (MB), investigated. Batch studies were carried out to determine influence of pH, dye concentration, adsorbent quantity, contact time on adsorption behaviour. Adsorption models based Langmuir, Freundlich, Temkin Dubinin-Radunkevich isotherms validated thermodynamic variables governing nature feasibility reaction evaluated....
The paper reports the removal of Chrysoidine R, a toxic mono-azo dye from its aqueous solution by employing metal-and halide-free variant ordered mesoporous carbon as adsorbent in batch experiments.The influence various parameters such hydronium ion concentration, dosage, initial exposure time on uptake was studied.The process could be described Langmuir, Freundlich and Dubinin-Radushkevitch isotherm models.Evaluation thermodynamic variables proved that adsorption spontaneous, feasible...
This study explores the detailed characterization of a biosorbent (Hen Feather) and its efficient use in eradicating azo dye Metanil Yellow (MY) from aqueous solutions. Effects range experimental parameters, including pH, initial concentration, dosage contact time on adsorption, were studied. A physical chemical was made using SEM, XRD, XPS FTIR. During optimization adsorption highest uptake almost 99% recorded at pH 2, concentration 2 × 10−5 M, 0.05 g period 75 min. Various isotherm models...
Pt and Pd particles supported on a texturally stable Ce0.68Zr0.32O2 mixed oxide were investigated by means of H2 chemisorption high-resolution transmission electron microscopy (HRTEM). The comparison the metal dispersion data as determined HRTEM with those estimated from volumetric adsorption reveals that, in case catalysts reduced at temperatures below 350 °C, isotherms recorded −80 °C provide reliable data. For at, or above, some platinum deactivation occurred. However, capability was...
SBA-15 was employed as the hard template in preparation of ordered mesoporous ZrO2 by replica method. The resultant ZrO2-SR product characterized XRD, TEM, EDX, SEM and nitrogen physisorption. starting material, intermediate were studied FT-IR. formation Zr–O–Si crosslinks made it impossible to obtain a pure product, although material did have similar structure template. results showed that method itself could be successfully used prepare ZrO2, but use silica meant silicon not completely...
The ionic and electronic transport properties of (with Me = Fe or Cr x 0, 0.05, 0.20) were studied by impedance spectroscopy in air (250 to 1000°C), high temperature (700 1000°C) ac conductivity measurements as a function oxygen partial pressure ( ranging from about 10−15 Pa), ion blocking (800 1000°C). Combination data for the p‐type n‐type contributions, obtained with latter technique conductivities measured allowed us estimate numbers these materials . Small additions (5%) found effective...
The effect of reduction temperature on the hydrogen adsorption and Rh dispersion in a Rh/Ce0.68Zr0.32O2 catalyst with texturally stable Ce0.68Zr0.32O2 support was investigated. data were also obtained from particle size analyses made using high-resolution transmission electron microscopy (HRTEM) images. Comparison values by two techniques showed that H2 at −80 °C is suitable tool for estimation temperature, Tred, ≤500 °C. For Tred > 500 °C, partial suppression chemisorption observed....
The synthesis of nanocrystalline solid solutions general formula CexZr1−xO2 (x = 0.1, 0.25, 0.5, 0.75, and 0.9) using a citrate complexation technique was followed with thermochemical methods, the resulting powders were characterized X-ray diffraction (XRD) electron microscopy (scanning high-resolution transmission (HRTEM)). Qualitative analysis XRD data indicated that samples exhibited either cubic (Fm3m) or tetragonal (P42/nmc) phase, depending on CeO2 content. Electron results consistent...
AuPd nanoparticles were prepared following a methodology designed to produce core-shell structures (an Au core and Pd shell). Characterisation suggested that slow addition of the shell metal favoured deposition onto pre-formed core, whereas more rapid formation monometallic phase in some with morphology. When used for selective hydrogenation acetylene, samples possessed particles over-hydrogenation form ethane. A sample by small amount resulted structure but an incomplete layer. This...