A5034317635- Advanced NMR Techniques and Applications
- Advanced Battery Materials and Technologies
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- NMR spectroscopy and applications
- Graphene research and applications
- Electrospun Nanofibers in Biomedical Applications
- Clay minerals and soil interactions
- Advanced Battery Technologies Research
- Risk and Portfolio Optimization
- Fuel Cells and Related Materials
- Electrostatics and Colloid Interactions
- Conducting polymers and applications
- Perovskite Materials and Applications
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Bone Tissue Engineering Materials
- Financial Markets and Investment Strategies
- Catalytic Processes in Materials Science
- Solid-state spectroscopy and crystallography
- Electron Spin Resonance Studies
- Thermal Expansion and Ionic Conductivity
Vietnam National University Ho Chi Minh City
2022-2024
Ho Chi Minh City University of Science
2020-2023
Conditions Extrêmes et Matériaux Haute Température et Irradiation
2012-2020
Centre National de la Recherche Scientifique
2012-2020
Université d'Orléans
2012-2020
Réseau sur le Stockage Electrochimique de l'énergie
2020
Deakin University
2018-2019
City College of New York
2017
Centre National pour la Recherche Scientifique et Technique (CNRST)
2015
We present a detailed investigation of the molecular structure montmorillonite, an aluminosilicate clay with important applications in materials sciences, such as for catalysis, drug delivery, or waste barrier. Solid-state 29Si, 27Al, 25Mg, and 1H nuclear magnetic resonance (NMR) measurements combined density functional theory (DFT) calculations provide comprehensive picture local composition synthetic its naturally occurring analogue. A revised is proposed based on NMR results that allow...
The intrinsic ionic conductivity of polyethylene oxide (PEO)-based block copolymer electrolytes is often assumed to be identical the PEO homopolymer. Here, we use high-field 7Li nuclear magnetic resonance (NMR) relaxation and pulsed-field-gradient (PFG) NMR diffusion measurements probe lithium ion dynamics over nanosecond millisecond time scales in polystyrene (PS)-b-PEO-b-PS containing salt LiTFSI. Variable-temperature longitudinal (T1) transverse (T2) rates were acquired at three field...
Dynamic nuclear polarization (DNP) magnetic resonance (NMR) spectroscopy is increasingly recognized as a powerful and versatile tool for the characterization of polymers polymer-based materials. DNP requires presence unpaired electrons, usually mono- or biradicals, method incorporation these groups their distribution within structure crucial. Methods covalently binding radicals to polymer controlling location (e.g., exclusively specific phase at an interface) can allow selective enhancement...
Abstract In this study, we synthesized hydroxyapatite (HA) on polyvinyl alcohol/TiO 2 (PVA/TiO ) in which TiO was prepared by the sol‐gel method. HA formed immersing membrane simulated body fluid (SBF) solution. We improved mechanical strength of membranes adding glutaraldehyde (GA) combining with heat treatment to cross‐link polymer network. addition, composition crystalline phase, content each membrane, and duration immersion SBF solution were investigated. The morphological structures...
Abstract Magic‐angle‐spinning (MAS) enhances sensitivity and resolution in solid‐state nuclear magnetic resonance (NMR) measurements. MAS is obtained by aerodynamic levitation drive of a rotor, which results large centrifugal forces that may affect the physical state soft materials, such as polymers, subsequent NMR Here, we investigate effects on measurements polymer electrolyte for lithium‐ion battery applications, poly(ethylene oxide) (PEO) doped with lithium salt LiTFSI. We show induces...
Abstract Our research aimed to improve the surface properties of TiO 2 for application in dye‐sensitized solar cells (DSC) by an alkaline hydrothermal process combined with H O treatment. The effect sources on product quality was evaluated further statistical analysis experimental data. two commercial precursors from Supelco (Merck – Germany) and BA‐100 (China) were used produce nano NaOH solution different concentrations 5 M 8 at 150 o C. final products characterized XRD, FT‐IR, FE‐SEM,...
Abstract In this work, we replaced the conventional solvents such as dimethyl sulfoxide (DMSO) or dimethylformamide (DMF) by deep eutectic (DES) in synthesis of methylammonium lead iodide perovskite (MAPbI 3 ). The first DES system was based on combination acetamide and urea (A–U–P system), homogenous solution formed at relative low temperature (~40°C). For second which choline chloride (A–C–P nitrate only dissolved higher (~100°C). Interestingly, did not precipitate when cooling down...
Solvent-free block copolymers electrolytes are the strongest candidates for solid-state lithium metal batteries, as new polymers based on polyethylene oxide (PEO) and bis(trifluoromethane)sulfonimide (LiTFSI) prevent formation of dendrites ensure sufficient conductivity. Block PEO either polystyrene (PS) or grafted PS-TFSI were compared to by Nuclear Magnetic Resonance spectroscopy (NMR) in order quantify distinguish transport dynamics Li + TFSI - effect polymer matrix. The self-diffusion...
Zinc oxide (ZnO) material possesses various morphologies which have given ZnO many fascinating applications in practice. Thus, the controlled synthesis of morphology and size microstructures has attracted great interest. Many synthetic methods exhibited their effectiveness producing pure ZnO, hydrothermal expresses its own considerable advantages for controlling with low particle-size distribution. Moreover, can be performed under mild condition rather than conventional harsh ceramic method....