A5008065184- Advanced Photocatalysis Techniques
- TiO2 Photocatalysis and Solar Cells
- Nanoparticles: synthesis and applications
- Soil Management and Crop Yield
- Advanced Nanomaterials in Catalysis
- Natural Fiber Reinforced Composites
- Iron oxide chemistry and applications
- Layered Double Hydroxides Synthesis and Applications
- Polymer Science and PVC
- ZnO doping and properties
- Photopolymerization techniques and applications
- Soil and Unsaturated Flow
- Electrospun Nanofibers in Biomedical Applications
- Nanomaterials for catalytic reactions
- Environmental Sustainability and Education
- Growth and nutrition in plants
- Urban Development and Societal Issues
- Geography and Environmental Studies
- Color Science and Applications
- Agricultural and Food Sciences
- Advanced oxidation water treatment
- Innovations in Concrete and Construction Materials
- Flame retardant materials and properties
- Building materials and conservation
- Clay minerals and soil interactions
Universidade Federal do Piauí
2016-2025
Materials Science & Engineering
2020
Universidade Federal de Lavras
2006-2007
Photocatalysis heterogeneous is an essential method for water treatment. In this study, a novel photocatalytic erbium-doped hydroxyapatite-decorated titanium dioxide (TiO2@Er-Hap) was obtained using the sol-gel and applied to remove ciprofloxacin (CIP) drug methylene blue (MB) dye contaminants. The sample's structural, physical, morphological, properties were investigated. X-ray diffraction (XRD) confirmed presence of anatase phase in TiO2@Er-Hap. oxide nanoparticles deposited on Hap...
Novel green photocatalysts based on ZnO in the presence of arabic gum (AGZ) or karaya (KGZ) were synthesized by a sol–gel method for photocatalytic performance.
TiO2 immobilized in Sepiolite (TiO2/Sep) was successfully prepared by the sol-gel technique, with titanium isopropoxide as precursor for formation of anatase phase calcined at 400 °C. The samples were characterized X-ray diffraction, Fourier Transform Infrared spectroscopy, Scanning Electron Microscopy coupled to energy dispersive and thermogravimetric analysis. results showed that TiO2/Sep structure identified all characterizations, showing specific peaks, bands, mass loss, morphology after...
Titanium dioxide TiO2/gellan gum (GG) in different compositions (1, 3, and 5% GG) was investigated to degrade methylene blue (MB) under UV light. XRD, SEM, EDS confirmed the anatase phase. The textural properties demonstrated formation of mesopores. band gaps were 3.2 eV, 3.0 2.9 eV. A photodegradation MB 95% observed using lowest concentration. It attributed photogenerated radicals specific surface area. FTIR spectra showed photostability catalyst after successive cycles. toxicity tests no...
Este estudo tem como objetivo fazer um levantamento preliminar sobre as características relevantes e representativas do polo cerâmico bairro Poti Velho, localizado na zona norte de Teresina-PI. Tendo foco oferecer elementos básicos para uma prévia análise da potencialidade Indicação Geográfica visa ainda apresentar requisitos mínimos tomada decisão a viabilidade ou não mais aprofundado, completo formal, além subsídios auxiliar em pesquisa futura referida temática. A caracteriza-se...
Clay minerals have advantages to be used as supports for obtaining new catalysts, in which colloidal and surface characteristics play a significant role. In addition their favorable physicochemical properties, clay allow different modifications form structures with broad photochemical capabilities. This review collects pertinent works of semiconductor nanoparticles loaded onto potential application hazardous contaminant photodegradation. Web Science, Scopus, Science Direct were bibliographic...
The increasing contamination of water resources by pharmaceutical compounds, such as Tetracycline (TC), has been a significant environmental concern due to the problems it can cause humans and environment. This study addressed effectiveness TC removal through an efficient approach that combines adsorption photocatalysis, using Cerium-doped TiO2 Sepiolite (Sep) nanocomposites supporting material. wt % Ce was varied (0, 1, 2.5, 5%), designating samples TiO2–Sep, 1CeTiO2–Sep, 2.5CeTiO2–Sep,...
The development of photocatalystsor their modification to obtain new photocatalytic performances for the removal contaminants is a challenge. Hydroxyapatite (HAp), (Ca10(PO4)6(OH)2), an inorganic component with high superficial area and low toxicity presence metal in its structure can be interesting strategy approach. This work aimed synthesize gallium-containing HAp (Ga-HAp) as promising material performance. synthesis was performed by suspension–precipitation method. characterized X-ray...
TiO2/Karaya composite was synthesized by the sol-gel method for photoinactivation of pathogens. This is first time that we have reported this an antimicrobial approach. The structure, morphology, and optical properties were characterized X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-rays (EDS), Fourier transform infrared spectroscopy (FTIR), diffuse reflectance, surface area BET method. XRD EDS results showed successfully stabilized crystal structure pore...
Emerging contaminants and pollution are environmental problems threatening public health. Antibiotic ciprofloxacin methylene blue dye pollutants frequently detected in water systems worldwide. Photocatalysis is a process for treatment. TiO2-based catalysts synthesized with natural gums show improved photocatalytic properties. Here, the sol–gel method TiO2/Arabic gum performance. The innovation of this work was at 400 °C investigated their proprieties using as model pollutants. XRD showed...
Babassu carbohydrate fibers (BCF) are abundant and renewable materials that currently underutilized. The present work evaluates the use of alkaline-treated BCF (TF − 0.6, 1.0, 1.4% w/w) as additive to cementitious mortars. Mass consistency, specific mass, water absorption, void ratio, porosity, well compressive indirect tension fracture strengths, were evaluated compared control mortars (without fiber addition). results confirmed treated can be an effective alternative a potential...
Rigid polyurethane foams were prepared by the one-step expandable foam method using casting molding followed forming clay-based composites. Polyurethane/vermiculite composites (PU/VMT) controlled based on adding percentage of clay in formulation. The effects composite modifications evaluated X-ray diffraction (XRD), thermogravimetric analysis (TG/DTG), and scanning electron microscopy (SEM/EDS) applied to flame retardancy explored vertical burn test. results indicated that particle size...
The present study aimed to investigate the degradation of poly(ethylene oxide) (PEO) in presence cationic dye crystal violet irradiated under visible light. preparation samples was done form films obtained by casting. Degradation tests were carried out 120 hours at room temperature. kinetics and polymer accompanied UV-Vis spectrophotometry viscosimetry technique. Spectra showed 81.2% dye. In addition, it observed a broadening absorption band reduction its viscosity, which features...
Soil-cement bricks are sustainable and economically viable alternatives due to the possibility of residue utilization. CNSL (Cashew nut shell liquid ) is an example from cashew industry that can be reused in many applications. Therefore, present work had as its objective produce soil-cement having a constituent formulation. The samples were obtained mixture pure CNSL, soil cement (1:10). soils used research extracted south state was pressed modular manual press. submitted resistance...