A5024709967- Advanced Photocatalysis Techniques
- Crystal Structures and Properties
- Radioactive element chemistry and processing
- Chemical Synthesis and Characterization
- Arsenic contamination and mitigation
- Microplastics and Plastic Pollution
- ZnO doping and properties
- Extraction and Separation Processes
- Metal Extraction and Bioleaching
- Nuclear materials and radiation effects
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Nanomaterials for catalytic reactions
- Recycling and Waste Management Techniques
- Geochemistry and Geologic Mapping
- Heavy metals in environment
- Pigment Synthesis and Properties
- Catalysis and Oxidation Reactions
- X-ray Diffraction in Crystallography
- Transition Metal Oxide Nanomaterials
- Inorganic Fluorides and Related Compounds
- Polymer composites and self-healing
- Polyoxometalates: Synthesis and Applications
- Fluoride Effects and Removal
- Crystallization and Solubility Studies
Vietnam Academy of Science and Technology
2016-2025
Institute of Materials Science
2021-2023
Hanoi University of Science and Technology
2019-2023
Vietnam Academy of Social Sciences
2019
National Central University
2011-2014
University of Bonn
2014
In this work, Ta-doped ZnO (Ta-ZnO) nanomaterials were synthesized by the hydrothermal method at different temperatures (110, 150, and 170 °C) for photodegradation of methylene blue (MB) under visible light. Ta doping significantly affects crystal defects, optical properties, MB photocatalytic efficiency materials. The absorption edge Ta-ZnO 150 was redshifted compared to undoped ZnO, correlating bandgap narrowing (EgTa-ZnO = 2.92 eV; EgZnO 3.07 eV), implying that doped is capable absorbing...
C, Ta-co-doped ZnO nanoparticles ( E g = 2.88 eV), prepared by hydrothermal method, were used as a photocatalyst under visible light to remove organic contaminants in aquatic environments.
C-ZnO/g-C 3 N 4 ( E g = 2.81 eV) self-assembled from as-prepared C-ZnO and g-C effectively photodegrades ofloxacin, a fluoroquinolone antibiotic, under visible-light irradiation in aqueous solutions.
A mixed-valence uranium(IV,VI) germanate has been synthesized under high-temperature, high-pressure hydrothermal conditions. The structure contains discrete U(IV)O(6) octahedra and U(VI)O(6) tetragonal bipyramids, which are connected by three-membered single-ring Ge(3)O(9)(6-) anions to form a three-dimensional framework with 9-ring channels. U 4f X-ray photoelectron spectroscopy spectrum was measured identify the valence states of uranium.
A pentavalent uranium germanate, Cs(3)UGe(7)O(18), was synthesized under high-temperature, high-pressure hydrothermal conditions at 585 °C and 160 MPa structurally characterized by single-crystal X-ray diffraction infrared spectroscopy. The valence state of confirmed photoelectron spectroscopy electron paramagnetic resonance. room-temperature EPR spectrum can be simulated with two components using an axial model that are consistent distinct sites uranium(V). In the structure title compound,...
A very rare tetravalent uranium germanate has been synthesized under hydrothermal conditions at 585 °C and 160 MPa. Its structure contains layers of single-ring Ge3O96– anions that are connected by UO6 octahedra dimers edge-sharing GeO5 trigonal bipyramids to form a three-dimensional framework with intersecting 6- 7-ring channels. UV–visible, photoluminescence, U 4f X-ray photoelectron spectroscopy were used confirm the valence state uranium.
A new mixed-valence uranium germanate and the silicate analogue have been synthesized under hydrothermal conditions at 600 °C 165 MPa. Their crystal structures contain infinite -U(V)-O-U(IV/V)-O-U(IV/V)-O-U(V)- chains that are connected by Ge(2)O(7) or Si(2)O(7) groups to form a 3D framework with six-ring channels where Cs(+) cations located. Two of Cs sites in partially occupied. Bond-valence-sum calculation an U 4f X-ray photoelectron spectroscopy study confirm valence states uranium.
In the present article, adsorbent prepared from laterite with lanthanum and cerium oxides (La2O3-CeO2/laterite (LCL)) was efficiently employed for removal of arsenite fluoride an aqueous environment. The obtained materials were characterized by XRD, SEM, nitrogen adsorption/desorption. synthesized LCL exhibited a high adsorption capacity towards (As(III)) fluoride. both analytes on LCL, which well-fitted to pseudo-second-order equation, found be kinetically fast in first 20 minutes reached...
Abstract The solid solutions (V 1– x W )OPO 4 with β‐VOPO structure type (0.0 ≤ 0.01) and α II ‐VOPO (0.04 0.26) were obtained from mixtures of V OPO by conventional state reactions solution combustion synthesis. Single crystals up to 3 mm edge length chemical vapor transport (CVT) (800 → 700 °C, Cl 2 as a transporting agent). crystal refinements at = 0.10 [ 6.0503(2) Å, c 4.3618(4) R 1 0.021, wR 0.058, 21 parameters, 344 independent reflections] 0.26 6.0979(2) 4.2995(1) 0.030, 0.081, 346...
The photocatalytic BiFeO3 perovskite nanoparticles were fabricated by gel combustion method using polyvinyl alcohol and corresponding metal nitrate precursors under the optimum mild conditions such as pH 2, formation temperature of 80 °C, metal/polyvinyl molar ratio 1/3, Bi/Fe 1/1 calcination at 500 °C for 2 h. prepared sample was characterized x-ray diffraction, field scanning electron microscopy, transmission Brunauer–Emmetl–Teller nitrogen adsorption 77 K, energy dispersive spectroscopy,...
Abstract In this study, nanoparticles of Fe 2 O 3 /Mn mixture were obtained using the sol–gel method. The synthesis uses combination polyvinyl alcohol (PVA) and tartaric acid (TA). Synthesized catalysts prove superior compared to those afforded from previous reports. To be specific, desired can received at lower calcination temperature. Furthermore, their structures display higher uniformity in term particle sizes. Finally, they show better performance for photocatalytic degradation...
A very rare organically templated niobium germanate was synthesized and structurally characterized by single-crystal X-ray diffraction. The crystal shows an intense second harmonic generation signal. It is the first example of synthesis metal using ionic liquid as a solvent.
The nano-mixed oxides CeO 2 -TiO was synthesized by gel combustion method using polyvinyl alcohol as fuel and mixtures of titanium trichloride cerium(IV) nitrate at a relatively low calcination temperature 550°C for h. prepared nanoparticles with specific area 65.70 m g −1 were dispersed in polyurethane matrix different concentration conditions from 0.0 to 1.5 wt% study ultraviolet durability following HONDA HES D 6501-97 standards. After 400 h testing the QUV accelerate weathering tester,...