A5103190193- Corrosion Behavior and Inhibition
- Concrete Corrosion and Durability
- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Gas Sensing Nanomaterials and Sensors
- Graphene research and applications
- Inorganic and Organometallic Chemistry
- ZnO doping and properties
- Conducting polymers and applications
- Polymer composites and self-healing
- Advanced Memory and Neural Computing
- Ga2O3 and related materials
- Thermochemical Biomass Conversion Processes
- Magnesium Oxide Properties and Applications
- Carbon and Quantum Dots Applications
- Luminescence Properties of Advanced Materials
- Advanced biosensing and bioanalysis techniques
- Polymer Nanocomposites and Properties
- Enzyme Catalysis and Immobilization
- Advanced ceramic materials synthesis
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Facial Trauma and Fracture Management
- Catalytic Processes in Materials Science
Instituto Nacional de Metrologia, Qualidade e Tecnologia
2015-2024
Universidade Federal do Rio de Janeiro
2014-2022
Universidade de Caxias do Sul
2017
The ability of nitrogenated derivatives furfural to act as corrosion inhibitors for mild steel in 1 mol L−1 HCl solution was evaluated using weight-loss measurements, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). imine 2-((furan-2-ylmethylene)amino)ethan-1-ol (1) the mixture 2-(furan-2-yl)-1,3-oxazinane 3-((furan-2-ylmethylene)amino)propan-1-ol (2a+b) presented, respectively, 81.9% 84.4% inhibition efficiency towards acidic at 5 × 10−3 L−1, room...
In this work, an endogenous self-doping N,P,S-CQDs was synthesized by the acid hydrolysis of pumpkin seeds (Cucurbita maxima) and its performance as a corrosion inhibitor evaluated. Mild steel (MS) is one most used materials in industry; however, it has low resistance acidic environments. Pumpkin cultivated worldwide, compositional characteristic makes great alternative raw material to produce CQDs. The results show that CQD successfully obtained with size distribution smaller than 10 nm....
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...
TiO<sub>2</sub>nanotubes enriched with Ca, P, and Zn by reverse polarization anodization, are promising bio-selective functional structures for osseointegrated titanium implants.
Neste estudo,
Abstract The high toughness, abrasion resistance, and water absorption capacity of polyamide‐6 (PA6), the restacking graphene oxide (GO) sheets make it quite challenging to get uniformly dispersed GO/PA6 nanocomposites. Herein, GO different parts per hundred ratios (phr) was melt‐mixed with PA6 matrix by double extrusion using a twin‐screw compounder, followed micro extruder, composites were prepared injection molding method. stress–strain curves from tensile measurements showed strain...
In this study, the effectiveness of a sustainable corrosion inhibitor derived from acerola peels and seeds (an industrial waste) applied to mild steel substrate (acerola aqueous extract - AAE) was studied. The inhibitory action evaluated by surface analysis, gravimetric, electrochemical tests. Results demonstrate that waste shows good inhibition efficiency acting through chemical adsorption onto steel. demonstrated maximum 92.0% at 8000 ppm after 2 hours immersion 96.3% 1000 24 hours. High...
An electroanalytical method based on differential pulse voltammetry was developed using a platinum electrode to monitor the quality and quantity of morpholine-based commercial inhibitors used in oil industry. The voltammetric presented strong linear correlation coefficient with response over concentration range 20 80 mg L−1 detection limit 12 L−1. In addition, has been shown be precise, homoscedastic. recovery for 102 ± 4%, inhibitor samples fortified morpholine 4%.
Developing a sustainable and environmentally friendly inhibitor remains an essential challenging goal for corrosion control. Here, different extracts from the same biomass (Juçara - Euterpe edulis) were applied as new mild steel in corrosive medium: 1 mol L−1 HCl (pH 0) simulated CO2-saturated formation water 5). Depending on extraction process, anticorrosive capacity of may increase, fact verified gravimetric tests, reaching 94.4% maximum inhibition efficiency acidic medium (1000 mg Juçara...
This work reports the obtention of Si,N,S-CQDs from sugar cane bagasse and their inhibitory action on mild steel corrosion in 1 mol L
The use of enzymes as catalysts requires recovery and reuse to make the process viable. Enzymatic immobilization changes enzyme stability, activity, specificity. It is very important explore new substrates for with appropriate composition structure improve efficiency immobilized enzymes. This work explores two different graphene oxide papers, one produced by oxidation route (GO) other electrochemical synthesis (EG), aiming β-galactosidase immobilization. chemical structural properties these...
In this work, an endogenous self-doping N,P,S-CQDs was synthesized by the acid hydrolysis of pumpkin seeds (Cucurbita maxima) and its performance as a corrosion inhibitor evaluated. Mild steel (MS) is one most used materials in industry however it has low resistance acidic environments. Pumpkin cultivated all over world compositional characteristic makes great alternative raw material to produce CQDs. The results show that CQD were successfully obtained with size distribution smaller than 10...
In this work, a new approach to the synthesis of lignin-derived nanocarbon crystals based on lignin depolymerization is proposed. The chemical structure was modified through controlled routine, which sequential UV light irradiation, hydrothermal carbonization in autoclave, vacuum degassing, pyrolysis and mechanical exfoliation. way, we were able obtain lignin-based with sp 2 -hybridized nanoporous framework oxygenated functional groups attached structure. employed catalyst-free route results...