BR – Page 3 – TechConnect Briefs

Synthesis and characterization of (polypyrrole/carbon) nanotubes/metal oxide composites for application as supercapacitors

de Oliveira A.H.P., de Oliveira H.P., de Oliveira A.H.P., de Oliveira H.P., UNIVASF, BR

The development of eco-friendly technologies such as hybrid vehicles requires more efficient high power energy storage materials, viz. supercapacitors. As reported in our previous work, the association of polypyrrole and carbon derivatives (modified graphene oxide [...]

Surfactants Nanocarriers to Enhanced oil Recovery (EOR)

Nascimento R.S.V., UFRJ, BR

The use organic surfactant nanocarriers as interfacial tension reducing agents is proposed in this work. These particles are able to permeate into the pores of the reservoir and release the surfactant by solubilization of the [...]

Polymer Nanofluid for enhanced oil recovery: A design of polystyrene nanoparticles, transport behavior evaluation and unconsolidated flooding test

de Araujo L.L.G.C., de Avila J.N.L., de Araujo L.L.G.C., de Avila J.N.L., Drexler S., Rodrigues Jr. J.A., Nascimento R.S.V., UFRJ, BR

This work focuses on the design of a nanoparticle containing polymer and surfactant containing that would be used in solution as a nanofluid for enhanced oil recovery. The nanoparticle is formed by crosslinking chemical reactions [...]

Synthesis and characterization of (polypyrrole/carbon) nanotubes/metal oxide composites for application as supercapacitors

de Oliveira A.H.P., de Oliveira H.P., de Oliveira A.H.P., de Oliveira H.P., UNIVASF, BR

The development of eco-friendly technologies such as hybrid vehicles requires more efficient high power energy storage materials, viz. supercapacitors. As reported in our previous work, the association of polypyrrole and carbon derivatives (modified graphene oxide [...]

Preparation of ZnO Nanowires for Solar Cells Aplicattion

Fernandes S.L., Zaghete M.A., Graeff C.F.O., Varella J.A., Longo E., UNESP, Universidade Estadual Paulista, BR

So far, the most successful solar cells have been produced using porous nanoparticles combined with TiO2 films. However, ZnO has emerged as a promising alternative to replace TiO2, with marked improvements in performance of the [...]

Microwave-assisted hydrothermal synthesis of Cu-doped titanate nanotubes: photoluminescence and photocatalysis properties

Manfroi D.C., Andrade L.P., Cavalheiro A.A., Jos A.A., Teixeira G.F., Perazolli L.A., Varela J.A., Zaghete M.A., Universidade Estadual Paulista, BR

Alkali titanates have been intensively investigated mostly because of their properties. And the interest for transition metal doping of 1D titanate nanostructures is enormous, especially copper. In the present work we report the synthesis of [...]

Alkali Halide Nanoclusters: Structure, Stability, Properties and Mechanism of Formation

Henkes A.V., Fantuzzi F., Nascimento M.A.C., Instituto de Química, Universidade Federal do Rio de Janeiro, BR

Results of accurate quantum-mechanical calculations for alkali halide nanoclusters (LiF, NaCl, KBr), revealed a variety of new morphologies - single and multiple tubes, double-sheets, honeycomb, sodalitic cages- quite distinct from the cubic macro crystal structure. [...]

Block Copolymer Nanocomposites With Mono- And Bioriented Structures

de Sousa Jr. R.R., Amurin L.G., Demarquette N.R., Carastan D.J., Federal University of ABC - UFABC, BR

Block copolymer nanocomposites are materials with interesting structures and properties. The control of their morphology can be obtained during processing, and anisotropic structures may be oriented in one or two directions, affecting both the copolymer [...]

Funcional lead-free composite

Teixeira G.F., de Oliveira J.A.M., Zaghete M.A., Longo E., Varela J.A., Chemistry Institute, UNESP- Araraquara, BR

In the work reported here was obtained a lead-free NaNbO3 / PVDF composite, starting from photoluminescent ceramics particles with 1D morphology obtained by microwave-assisted hydrothermal method. Photoluminescence spectrum of the NaNbO3 particles shown emission around [...]

ZnO nanorods decorated with Au nanoparticles applied as gas sensors

Gasparotto G., Mazon T., Gasparotto G., Silva R.A., Zaghete M.A., Perazolli L.A., Varela J.A., CTI, BR

Zinc oxide (ZnO) is a n-type semiconductor with energy band gap of 3:37 eV and a large binding energy of 60 meV at room temperature. ZnO nanostructures can be easily obtained with different morphologies by [...]