A5101671979- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Advanced ceramic materials synthesis
- Gas Sensing Nanomaterials and Sensors
- Extraction and Separation Processes
- Clay minerals and soil interactions
- Organic and Molecular Conductors Research
- Transition Metal Oxide Nanomaterials
- Advanced Battery Materials and Technologies
- Free Radicals and Antioxidants
- Advancements in Solid Oxide Fuel Cells
- Magnetic and transport properties of perovskites and related materials
- Thermal and Kinetic Analysis
- Catalysis and Oxidation Reactions
- Trigeminal Neuralgia and Treatments
- Silicone and Siloxane Chemistry
- Copper-based nanomaterials and applications
- Zeolite Catalysis and Synthesis
- Chemical Looping and Thermochemical Processes
- Electrophoretic Deposition in Materials Science
- Material Properties and Applications
- Concrete and Cement Materials Research
- Organic Chemistry Cycloaddition Reactions
- Facial Nerve Paralysis Treatment and Research
- Supercapacitor Materials and Fabrication
Universidade Federal Fluminense
2012-2022
Universidade Federal do Rio de Janeiro
2012
Lithium cobalt oxide, LiCoO 2 , widely used as cathode in lithium ion batteries was synthesized and their structural electronic properties investigated.The crystalline powders were prepared by the sol-gel method with four complexing agents: citric acid, glycine, starch gelatin.These syntheses compared blank test (without agent).The X-ray diffraction vibrational spectroscopy allowed identification of rhombohedral phase ( ) only or principal component all samples.A small fraction a second...
Abstract The SiO 2 /TiO /Nb O 5 material was set by the sol–gel method and characterized several techniques through thermogravimetric, spectroscopic, textural analyzes. For two synthesized materials, specific surface area 350.0 494.0 m g −1 (SiTiNb-A SiTiNb-B, respectively). An enhance of crystalline order with temperature increase thermal treatment observed. Through X-ray Photoelectron Spectroscopy analysis, binding energy values for Ti 2p Nb 3d levels showed insertion atoms in silica...
Many types of facial pain are difficult to treat, such as postherpetic, posttraumatic, or following denervation procedures used in the treatment trigeminal neuralgia (anesthesia dolorosa), all which involve deafferentation spinal nucleus.
Density functional theory (DFT) (B3LYP/6-311++G(d,p)) calculations of the interacting strength 1,2-dithiolene anionic ligands with [M(OH 2 ) 4 ] 2+ and complexes (M = Ni Zn) were performed.Three series studied: compounds an aromatic ring, ethylene moiety a heterocyclic ring.The have substituents electron donors acceptors by induction resonance.Two substitution reactions first is two water molecules from 6 dithiolene ligand (L 2-) second L] another ligand.Geometric, electronic energetic...
This paper describes a simple procedure to synthesize materials with NASICON-like structures, using starch as mild combustion fuel. The results of ICP-MS, x-ray and Raman spectroscopy present that the samples can be classified solid solution isostructural Li2Co2(MoO4)3. analysis by diffraction shows increase on amount promotes crystallinity, leading peaks more intense better defined. Moreover, we infer increases substantially material capacity (5 mAhg-1 52 mAhg-1), well leads definition redox
Lithium manganese oxide, LiMn 2 O 4 , was synthesized in two temperature stages, where the first consisted by an ecofriendly solution combustion method at 300 °C.Finally, as-burned powders were thermal treated 500 and 700 °C.The structural morphological changes evaluated Rietveld density functional theory (DFT) calculations.The refinement indicates obtaining spinel cubic phase a small amount of Mn 3 .The analyses scanning electron microscopy (SEM) transmission (TEM) show porous...
Background: Currently, solution combustion synthesis (SCS) is considered a reproducible, flexible, and low-cost method for the preparation of nanomaterials. A new trend in SCS use less polluting fuels, such as starch. The starch fuel very interesting green chemistry, it renewable has several advantages, including its abundance, low-cost, non-toxicity. Objective: This paper provides comprehensive review using fuel. main advantages will be illustrated with wide variety examples, highlighting...
A new silicon-aluminum-zirconium ternary oxide (SiO 2 /Al O 3 /ZrO ) was prepared by the sol-gel method followed one-step washing with absolute ethanol or two-step ultra-pure water.Both oxides presented high surface area (over 340 m g -1 ).The binding energy values for Zr3d and Al2p levels showed insertion of Zr Al atoms in silica matrix, confirming dispersion these elements as shown scanning electron microscope (SEM) dispersive X-ray fluorescence spectroscopy (EDXRF) data.A weight loss...