A5057123643- Thermal and Kinetic Analysis
- Biodiesel Production and Applications
- Lubricants and Their Additives
- Magnetic Properties and Synthesis of Ferrites
- Chemical Thermodynamics and Molecular Structure
- Iron oxide chemistry and applications
- Copper-based nanomaterials and applications
- Magnetic properties of thin films
- Advanced biosensing and bioanalysis techniques
- Advanced Nanomaterials in Catalysis
- Nonlinear Optical Materials Research
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Multiferroics and related materials
- Polymer Nanocomposites and Properties
- Ginkgo biloba and Cashew Applications
- Thermodynamic properties of mixtures
- Crystallography and molecular interactions
- Luminescence Properties of Advanced Materials
- Milk Quality and Mastitis in Dairy Cows
- Advanced Photocatalysis Techniques
- Electronic and Structural Properties of Oxides
- Analytical Chemistry and Chromatography
- Metal-Organic Frameworks: Synthesis and Applications
- Material Science and Thermodynamics
Universidade Federal do Rio Grande do Norte
2025
Universidade Federal do Maranhão
2013-2023
Universidade Federal da Paraíba
2004-2009
Universidade Federal de Campina Grande
2007-2009
Sociedade Brasileira de Cardiologia
2005
Centro Universitário de João Pessoa
2005
Universidade Federal do Pará
2005
The main factors responsible for the oxidative processes of biodiesel are oxygen, metal traces, high temperature and amount unsaturated fatty acids. quality is harmed by oxidation products, which corrosive to engine chambers may lead clogging injection pumps filters, besides increasing viscosity. Thus, this work aimed at investigating stability corn biodiesel, obtained base-catalyzed transesterification reaction, using ethanol route. As-synthesized, stored heated samples were characterized...
Ceramic spinel-based ferrites of Cobalt, Nickel, Copper and Zinc were prepared using the hydrothermal method assisted with microwave. All samples characterised EDS, WDXRF, XRD, SEM, FTIR, Raman VSM techniques. The structural, compositional, phonic magnetic properties indicate that evaluated can produce materials. EDS WDXRF analyses suggest materialisation Co1.0Fe2.0O4, Ni0.9Fe2.1O4, Cu1.1Fe1.9O4 Zn1.1Fe1.9O4 ferrites. XRD measurements formation monophasic Nickel cubic inverse-spinel-based...
The use of microwave-assisted synthesis (in water) α-Fe2O3 nanomaterials followed by their transformation onto iron oxide Fe3O4-γ-Fe2O3 hollow nanoparticles encoding well-defined sizes and shapes [nanorings (NRs) nanotubes (NTs)] is henceforth described. impact experimental variables such as concentration reactants, volume solvent employed, reaction times/temperatures during the shape-controlled revealed that key factor gated generation morphologically diverse was associated to initial...
l-glutamine complexes with transition metals have already been reported in the literature, but there no studies on Ni2+. Here, new polycrystalline spherulite-like Ni(II)(l-glutaminato·H2O)2 complex was synthesized, and powder X-ray diffraction (PXRD) measurements density functional theory (DFT) calculations were performed to determine its crystal structure. SEM images revealed beautiful morphological microstructure of complex's surface internal region. Thermogravimetric analysis (TGA)...
Non-standard diesel blends can be harmful to the environment and human health. In this context, a simple analytical method estimate biodiesel mixture ratio in was developed based on impedance spectroscopy (IS) associated with interdigitated sensors. article, four different sensors varied comb spacing (G) were simulated using COMSOL Multiphysics software. Based finite element simulations, electrode architectures manufactured evaluated. The best geometry chosen according theoretical data its...
Extractive desulfurization with ionic liquids has attracted significant attention from a growing number of scientists due to the current environmental restrictions on fuel. Protic (PILs) were synthesized via equimolar neutralization morpholine and formic-based compounds. The obtained PILs characterized by Fourier transform infrared 1H NMR spectroscopy used as promoter for room temperature deep model oil commercial B0S500 diesel. in n-octane showed that alkyl chain length liquid...
Abstract A novel label‐free photoelectrochemical immunosensor was developed for the determination of prostate‐specific antigen (PSA) based on fluorine‐doped tin oxide (FTO) electrode modified with barium titanate and cadmium sulfide (BaTiO 3 −CdS/FTO). The current density BaTiO platform sensitized CdS ascorbic acid (AA) donor molecule higher than that observed in absence CdS. −CdS/FTO PSA antibodies to produce anti‐PSA/BaTiO immunosensor, which incubated solutions inhibit photocurrent AA....
There are many methods used to measure the composition of biodiesel in diesel. However, standard limited by high cost and precision. Here is proposed a low-cost sensor determine binary blends biodiesel/diesel, using dielectric constant. The concentrations were varied from 0–9% at frequencies 100–2000 Hz. correlation curves between constant biodiesel/diesel concentration included an adjustment factor 0.992. Moreover, values obtained for each blend statistically distinct, yielding precise measurements.
Cardiovascular diseases are considered one of the leading causes premature mortality patients worldwide. Therefore, rapid diagnosis these is crucial to ensure patient's survival. During a heart attack or severe muscle damage, myoglobin rapidly released in body constitute itself as precise biomarker acute myocardial infarction. Thus, we described photoelectrochemical immunosensor development detect myoglobin. It was based on fluorine-doped tin oxide modified with CdSeS/ZnSe quantum dots and...