A5037545330- Conducting polymers and applications
- Lubricants and Their Additives
- Tribology and Wear Analysis
- Supercapacitor Materials and Fabrication
- Advanced Sensor and Energy Harvesting Materials
- Biodiesel Production and Applications
- Analytical Chemistry and Sensors
- Diamond and Carbon-based Materials Research
- Biosensors and Analytical Detection
- Ionic liquids properties and applications
- Electrochemical Analysis and Applications
- Gear and Bearing Dynamics Analysis
- Semiconductor materials and interfaces
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Transition Metal Oxide Nanomaterials
- TiO2 Photocatalysis and Solar Cells
- Advanced Nanomaterials in Catalysis
- Carbon and Quantum Dots Applications
- Spectroscopy and Quantum Chemical Studies
- Organic Electronics and Photovoltaics
- Copper Interconnects and Reliability
- Advanced Chemical Sensor Technologies
- Advanced Chemical Physics Studies
Brazilian Agricultural Research Corporation
2019-2021
Universidade Federal de São Carlos
2012-2017
Hydrogen peroxide (H2O2) is an important compound for several industrial sectors, but it becomes harmful to human health under high concentrations. Thus, the development of simple, low cost and fast analytical methods capable detect monitor H2O2 fundamentally important. In present study, we report a simple route synthesizing silver nanoparticles (AgNPs) in presence nanostructured polysaccharide (cellulose nanowhiskers) produce hybrid material, which was employed as colorimetric probe...
Lubricant friction modifier additives are used on lower-viscosity engine oils to mitigate the impact boundary friction. In this work, use of Graphene nanoplatelets, with an average 9 layers, was first investigated as additive a fully formulated SAE 0W-20 oil during reciprocating tribological tests at 40 and 120 °C Hertzian pressure up 1.2 GPa. Then, fuel consumption evaluated in vehicle emission test by adding 0.1% GNP, improved booster, onto 5W-20 oil. Adding GNP reduced 2.6% FTP-75 cycle...
Graphene-based materials have great potential for tribological applications. Graphene’s unique properties such as low shear resistance, high stiffness, and thermal conductivity make it an attractive material improving the of lubricants in a wide range industrial applications, from vehicles to house refrigerators machinery gearboxes, large compressors, etc. The current review aims give engineering perspective, attributing more importance commercially available graphene fully formulated...
Two engine oil additives with graphene were tested in diesel engines. The first was a oxide (GO)-based, commercially available additive that the supplier recommends using at 3% v/v concentration oil. second nanoplatelet (GNP)-based is under development, which more concentrated and allows for addition of much smaller amount additive. Using GO results reduction brake-specific fuel consumption from 0.2% to 0.7%, depending on load, 2% when run without load. use 0.1% wt GNPs led 0.4% savings an...
Lubricant friction modifier additives are used on lower viscosity engine oils to mitigate boundary friction. This work presents the development of a graphene-based material as an oil additive, from formulation actual vehicle tests. The graphene was initially characterized using scanning electron microscopy (SEM) and Raman spectroscopy, which revealed predominance nanoplatelets (GNPs) with average nine layers. After functionalization, two GNP additive variants were mixed fully formulated SAE...
Here we report supercapacitors fabricated with the layer-by-layer (LBL) technique using two polymers, namely poly(o-methoxyaniline) (POMA) and poly(3-thiophene acetic acid) (PTAA). The electrochemical performances of POMA/PTAA were characterized by cyclic voltammetry impedance spectroscopy. results compared POMA casting film. specific capacitance LBL films increases almost linearly a number bilayers which not observed for films. this investigation demonstrate that self-doping effect between...
The high sensitivity of ATR-SEIRAS allowed simultaneous recording time-resolved infrared spectra the Pt-electrolyte interface and current flowing during CO-charge displacement experiments. These experiments revealed dynamics CO adsorption on Pt, as well rearrangement interfacial water layer. Our show that COL sites are populated first, COB appearing only at slightly higher coverages. At potentials sufficiently separated from potential zero total charge, charge displaced upon Pt integrated...
The growing awareness of reduced friction losses and new demands for electrical powertrains demand improved lubricants. Due to their unique properties, such as high thermal conductivity, graphene its derivatives have been investigated tribological applications, especially lubricant additives. In this work, we three commercially available variants, one comprising a few layers the other two nanoplates, after functionalization additives lithium soap grease. grease temperature dropping point...
Lubricant friction modifier additives are used on lower-viscosity engine oils to mitigate the impact boundary friction. In this work, use of Graphene nanoplatelets, with an average 9 layers, was first investigated as additive a fully formulated SAE 0W-20 oil during reciprocating tribological tests at 40 and 120 °C Hertzian pressure up 1.2 GPa. Then, fuel consumption evaluated in vehicle emission test by adding 0.1% GNP, improved booster, onto 5W-20 oil. Adding GNP reduced 2.6% FTP-75 cycle...
Nowadays, capacitors and rechargeable batteries have attracted attention due the urgency efficient sustainable energy storage devices [1]. Supercapacitors can be classified into two categories depending on charge mechanism: electrochemical double-layer (EDLCs) pseudo-capacitors. EDLCs store electrical at interface between surfaces area electrode electrolyte. In second kind an additional stored in a reversible reactions interface. Pseudo-capacitors larger amount of charges per gram than EDLC...