A5033686582- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Electrospun Nanofibers in Biomedical Applications
- Catalytic Processes in Materials Science
- Pigment Synthesis and Properties
- Electrohydrodynamics and Fluid Dynamics
- Recycling and utilization of industrial and municipal waste in materials production
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials
- Materials Engineering and Processing
- Recycling and Waste Management Techniques
- Supercapacitor Materials and Fabrication
- Advanced ceramic materials synthesis
- Copper-based nanomaterials and applications
- Laser-Ablation Synthesis of Nanoparticles
- Recycled Aggregate Concrete Performance
- Catalysis and Oxidation Reactions
- Advancements in Battery Materials
- Carbon Nanotubes in Composites
- Nanotechnology research and applications
- Hygrothermal properties of building materials
- Aerogels and thermal insulation
- Chromium effects and bioremediation
- Material Selection and Properties
Universidade Federal do Rio Grande do Sul
2011-2024
Universidade Federal do Pampa
2011
Swiss Federal Laboratories for Materials Science and Technology
2008-2010
Abstract The increasing water contamination by toxic heavy metals, particularly hexavalent chromium, has become a significant environmental concern. This study explores the pyrolysis of termite-processed biomass, specifically Pinus elliottii particleboard and its termite droppings (TDs), to produce biochar application for chromium (VI) adsorption. Termite droppings, rich in lignin, particleboard, cellulose, were pyrolyzed at various temperatures assess effect biomass composition on...
Electrolytic synthesis in molten salts has excellent possibilities for the production of various carbonaceous materials, nevertheless, a study conditions is necessary that carbon products obtained nanotube (CNT) structure. In this work, possibility MWCNTs (multi walled nanotubes) by electrolytic been shown. The product structure and morphology can be controlled choosing right electrolysis (type electrode, applied current time). properties produced carbon-containing were analyzed XRD, TEM,...
This work has focused on the development of electrospun TiO2 fiber composite photoelectrodes for hydrogen production by water splitting. For comparison, similar were also developed using commercial (Aeroxide P25) nanoparticles (NPs). Dispersions either fibers or P25 NPs used to make homogenous films fluorine-doped SnO2 (FTO) glass substrates a doctor blade (DB) technique. Scanning electron microscopy (SEM) analysis revealed much lower packing density DB fibers, with respect DB-P25 NPs; this...
This work has focused on the investigation of a non-aqueous based sol-gel process to produce TiO 2 photoelectrodes for solar water splitting. In particular, effect aging time sol and film thickness photoelectrochemical properties photoanodes been investigated. order achieve optimal performances (i.e., photocurrent density up 570 µ A/cm IPCE 26% at 300 nm), needs be aged 3 6 h, before being dip-coated photoanodes. The importance can also appreciated from optical films; absorbance threshold...
Electrospinning was employed to produce homogeneous inorganic-organic composite fibers from alcohol solutions containing polyvinyl butyral (PVB) and precursor of yttrium cerium ions. Upon heat treatment, ceria yttria-doped were obtained. The retained the original morphology observed in as-spun composition. X-ray diffraction used identify crystalline phases final products. Scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential thermal (DTA), BET study ceramic-phase...
The nanocomposites were obtained from commercial multi-walled carbon nanotubes (MWCNTs) and with titanium tetra propoxide as TiO2 precursor, heat treated at 400°C 500°C to form crystalline phases of TiO2. investigated for their photocatalytic activity, employing them catalysts in the degradation organic methyl orange dye an aqueous solution under UV radiation. results associated characteristics nanocomposite structure, using techniques such x-ray diffraction, transmission electron...
Composite fibers of polyvinylpirrolidone and titanium propoxide were prepared using the electrospinning technique. Titanium oxide obtained on heat treatment this composite. These characterized by means specific surface area, thermal analysis, X-ray diffraction electronic microscopy processes. Evaluation their photocatalytic activity was carried out in comparison with nanometric powder TiO2 P25 from Degussa as reference. The photo-oxidative decomposition methyl orange followed...
ABSTRACT This article describes the effects of pH on preparation and properties aluminas (A l 2 O 3) produced by sol-gel colloidal method. The precursor, hexahydrated aluminum chloride, was subjected to peptization reactions giving rise a viscous gel with amorphous characteristics. Calcination at temperatures about 1000°C caused this transform into alumina products different morphologies, such as powders, fibers, or porous ceramic bodies, depending process parameters adopted, drying...
Homogeneous inorganic-organic composite fibres were produced using electrospinning technique from alcoholic solutions containing polyvinyl butyral and precursors of yttrium cerium ions. Upon heat treatment, ceria yttria doped retaining the original morphological features observed in as spun composition obtained. X-ray diffraction was used to identify crystalline phases final products. Scanning electron microscopy, thermogravimetric analysis, differential thermal analysis...