A5035216496- Advancements in Battery Materials
- Extraction and Separation Processes
- Metal Extraction and Bioleaching
- Arsenic contamination and mitigation
- Advanced Battery Materials and Technologies
- Minerals Flotation and Separation Techniques
- Mine drainage and remediation techniques
- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Iron oxide chemistry and applications
- Crystallization and Solubility Studies
- Calcium Carbonate Crystallization and Inhibition
- Chemical and Physical Properties in Aqueous Solutions
- Radioactive element chemistry and processing
- Advanced Battery Technologies Research
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- Supercapacitor Materials and Fabrication
- Metallurgical Processes and Thermodynamics
- Chalcogenide Semiconductor Thin Films
- Copper-based nanomaterials and applications
- Chemical Synthesis and Characterization
- Electrophoretic Deposition in Materials Science
- Recycling and Waste Management Techniques
McGill University
2014-2024
Concordia University
2014
University of Saskatchewan
2007-2010
Canadian Light Source (Canada)
2010
Université de Montréal
2010
Institute of Process Engineering
2007-2009
Beijing University of Chemical Technology
2009
Institute of Applied Ecology
2005-2006
Chinese Academy of Sciences
2005-2006
Aristotle University of Thessaloniki
2004
Er3+,Yb3+ co-doped LaF3-TiO2 nanocomposites (UC-TiO2) are inserted as a middle layer in novel tri-layer photoanode design (see Figure) of dye-sensitized solar cell (DSSC). The LaF3 part the nanocomposite helps capture near-infrared (NIR) light by converting it into visible absorbable dye hence opening road for development DSSCs with higher conversion efficiency and photocurrent output. Detailed facts importance to specialist readers published "Supporting Information". Such documents...
Abstract Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized cell technology is combined with lithium-ion materials investigate light-assisted battery charging. In particular we report direct photo-oxidation of lithium iron phosphate nanocrystals presence dye as hybrid photo-cathode two-electrode system, metal anode hexafluorophosphate carbonate-based electrolyte; configuration corresponding ion Dye-sensitization...
X-ray diffraction and Raman spectroscopy were used in this study to characterize arsenate phases the arsenate-ferrihydrite sorption system. Evidence has been obtained for surface precipitation of ferric on synthetic ferrihydrite at acidic pH (3-5) underthe following experimental conditions: density As/Fe approximately 0.125-0.49 arsenic equilibrium concentration <0.02-440 mg/L. Surface occurred under apparently undersaturated (in bulk solution phase) conditions, probably involved initial...
Vibrational spectroscopic studies of N719 dye-adsorbed TiO(2) films have been carried out by using SERRS, ATR-FTIR, and confocal Raman imaging. The high wavenumber region (3000-4000 cm(-1)) dye adsorbed is analyzed via IR spectroscopy to investigate the role surface hydroxyl groups in anchoring mode. As a complementary technique, imaging employed study distribution features key (COO-, bipyridine, C=O) on anatase surface. Sensitized made from two different nanocrystalline powders are...
Uniform β-NaYF(4):Er(3+)/Yb(3+) hexagonal nanoplatelets were synthesized via a modified hydrothermal route, and the applied as an external, bifunctional layer in novel DSC configuration consisting of only one internal TiO(2) transparent layer. Approximately 10% enhancements photocurrent overall efficiency are demonstrated by addition external layer, which exhibits two functions light reflecting near-infrared (NIR) harvesting. The not simplifies fabrication process but also eliminates charge...
Identifying the structure of electrodes at atomic-scale remains a key challenge but is fertile realm for groundbreaking fundamental research in advanced Li-ion battery material field. In this context, subtle evolution taking place during lithiation/delithiation bulk/surface Li4Ti5O12 spinel (LTO) was probed using scanning transmission electron microscopy and found to undergo significant torque, namely Ti–O bond stretching/shrinking different state-of-charge (SOC), which not identified...
Latest advances in hydrometallurgical recycling open new sustainable processing options beyond efficient recovery of metals towards direct and upcycling the NMC active materials.
Mineral processing effluents generated in hydrometallurgical industrial operations are sulfate based; hence it is of interest to investigate the effect matrix solution ("sulfate media") has on arsenate adsorption onto ferrihydrite. In this work, particular, influence media (SO42- vs NO3-), added gypsum, and pH alteration ferrihydrite been studied. The precipitated from incorporated a significant amount ions showed much higher capacity for compared nitrate−ferrihydrite at 3−8 initial Fe/As...
Upconversion materials show great potential in converting infrared light to visible for many optoelectronic and photovoltaic devices. One of the most promising upconverting is Yb(3+),Er(3+)- doped β-NaYF4. In this study, annealing shown have a significant impact on phase, morphology, upconversion luminescence β-NaYF4:Yb(3+),Er(3+) crystals varying sizes (300 nm, 700 2.3 μm, respectively) prepared by hydrothermal synthesis stabilized with sodium citrate. maximized via while maintaining...
Here we report the development of quantum dot sensitized solar cells (QDSCs) using colloidal PbS and PbSeS dots (QDs) polysulfide electrolyte for high photocurrents. QDSCs have been prepared in a novel sensitizing way employing electrophoretic deposition (EPD) protecting QDs from corrosive with CdS coating. EPD allows rapid, uniform, effective sensitization QDs, while coating stabilizes electrode. The effect time QD size on cell efficiency is analyzed. Efficiencies as 2.1 ± 0.2% are reported.
Zero‐strain and long‐term stability of nanoscale lithium titanate (LTO) anode materials make possible the fabrication exceptionally stable ion batteries. But one issue must be considered that nanostructure‐induced relaxation in 2D LTO nanosheets which profoundly modifies their Li storage properties structural stability. Excessively intercalated ions at both 8 a 16 c sites trigger nucleation relaxed structure near‐surface region, impedes Li‐ion diffusion causes increasing polarization...
The effects of inorganic impurities on the crystallization calcium sulfates in strong HCl (6.3 mol L–1)-CaCl2 (1.8 L–1) solutions were investigated. considered relate to hydrochloric acid leaching apatite-type ores for extraction rare earth elements. investigated K+, Mg2+, Sr2+, Ba2+, Al3+, Fe2+, Fe3+, La3+, Y3+, F– (fluoride), and PO43– (phosphate). investigation was done context a continuous steady-state process. Therefore, temperature-controlled, semibatch crystal growth experiments with...
Mixed-phase nanoTiO2 materials attract a lot of attention as advanced photocatalysts for water decontamination due to their intrinsic structure that allows better photo-excited e−cb-h+vb charge separation, hence improved photocatalytic efficiency. Currently, the best-known mixed-phase TiO2 photocatalyst is P25 with approximate composition 80% Anatase/20% Rutile (A/r). Apart from Anatase (A) and (R) phases, there Brookite (B) which has been evaluated less in systems. In this work we present...