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Your search keyword '"Carreno, Neftali L. V."' showing total 11 results
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11 results on '"Carreno, Neftali L. V."'

3. Development of Lead-Free Radiation Shielding Material Utilizing Barium Sulfate and Magnesium Oxide as Fillers in Addition Cure Liquid Silicone Rubber

Author

Souza, Everton G., primary, Kruger, Kaiser, additional, Nascimento, Chiara D., additional, Aguzzoli, Cesar, additional, Hoff, Gabriela, additional, Moraes, Ana Cristina B. K., additional, Lund, Rafael G., additional, Nascente, Patrícia S., additional, Cuevas-Suárez, Carlos E., additional, Piva, Evandro, additional, and Carreno, Neftali L. V., additional

Published
2023
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4. Preparation and characterization of graphene nanosheets from graphite flakes through assisted intercalation-expansion using a microwave oven

Author

Knuth, Rogério D., primary, Knuth, Flávio A., additional, Maron, Guilherme K., additional, Raubach, Cristiane W., additional, Moreira, Mário L., additional, Jardim, Pedro L. G., additional, Carreno, Neftali L. V., additional, Moreira, Eduardo C., additional, Gündel, André, additional, Garcia, Irene T. S., additional, and Cava, Sergio S., additional

Published
2023
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5. Advances in Nanostructured Cellulose-based Biomaterials

Author

Carreño, Neftali L. V., Barbosa, Ananda M., Noremberg, Bruno S., Salas, Mabel M. S., Fernandes, Susana C. M., Labidi, Jalel, Kacprzyk, Janusz, Series editor, Carreño, Neftali L V, Barbosa, Ananda M, Noremberg, Bruno S., Salas, Mabel M. S., Fernandes, Susana C M, and Labidi, Jalel

Published
2017
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7. Development of xanthan gum‐based solid polymer electrolytes with addition of expanded graphite nanosheets

Author

Knuth, Rogerio Daltro, primary, Knuth, Flávio A., additional, Maron, Guilherme K., additional, Balboni, Raphael D. C., additional, Moreira, Mario L., additional, Raubach, Cristiane W., additional, Jardim, Pedro L. G., additional, Carreno, Neftali L. V., additional, Avellaneda, César O., additional, Moreira, Eduardo C., additional, and Cava, Sérgio S., additional

Published
2022
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9. Synthesis of LiNbO3nanocrystals by microwave-assisted hydrothermal method: formation mechanism and application to hydrogen evolution reaction

Author

Deon, Vinicius G., Thesing, Anderson, Santana, Luiza R., Costa, Vanize C., Vaz, Maurício O., Silva, Ricardo M., Mesko, Marcia F., and Carreno, Neftali L. V.

Abstract

Lithium niobate (LiNbO3) is an important ferroelectric material with a wide range of applications. In this work, the use of microwave radiation to improve the conditions of hydrothermal synthesis of pure nanocrystalline LiNbO3was proposed. The structural characterization showed that nanoparticles of a pure LiNbO3phase were synthesized. The scanning electron microscopy and transmission electron microscopy analysis revealed a high-quality nanoparticle with an average diameter of ca. 42 and 65 nm for 2 and 3 h of synthesis time, respectively. These results represent a time-saving using a microwave-assisted hydrothermal method for LiNbO3preparation, with excellent quality at the nanometer scale. The nanoparticles were employed as photocatalysts for hydrogen evolution reaction through water splitting, reaching the rate of 10.5 µmol h−1g−1. It had shown to be a potential candidate for water photolysis due to the small particle size and high crystallinity. Moreover, it also allows the direct and fast synthesis of LiNbO3on carbon fiber, multi-walled carbon nanotubes and nanocellulose, which were used as supporting materials for the fabrication of novel nanocomposites.

Published
2021
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10. Feasible and Clean Solid-Phase Synthesis of LiNbO3 by Microwave-Induced Combustion and Its Application as Catalyst for Low-Temperature Aniline Oxidation

Author

Carreno, Neftali L. V., primary, Deon, Vinícius G., additional, Silva, Ricardo M., additional, Santana, Luiza R., additional, Pereira, Rodrigo M., additional, Orlandi, Marcelo O., additional, Ventura, Wellington M., additional, Dias, Anderson, additional, Taylor, Jason G., additional, Fajardo, Humberto V., additional, and Mesko, Marcia F., additional

Published
2018
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11. Highly transparent sustainable biogel electrolyte based on cellulose acetate for application in electrochemical devices.

Author

Balboni RDC, Cholant CM, Lemos RMJ, Rodrigues LS, Carreno NLV, Santos MJL, Avellaneda CAO, and Andreazza R

Subjects
Polymers, Electric Conductivity, Electrolytes, Cellulose analogs & derivatives
Abstract

In this study, an easy and low-cost production method for a cellulose acetate-based gel polymer containing lithium perchlorate and propylene carbonate is described, as well as the investigation of its properties for potential use as an electrolyte in electrochemical devices. Cellulose acetate, a biopolymer derived from natural matrix, is colourless and transparent, as confirmed by the UV-Vis spectroscopy, with 85 % transparency in visible spectrum. The gels were prepared and tested at different concentrations and proportions to optimise their properties. Thermogravimetry, XRD, and FTIR analyses revealed crucial characteristics, including a substantial 90 % mass loss between 150 and 250 °C, a semi-crystalline nature with complete salt dissociation within the polymer matrix, and a decrease in intensity at 1780 cm -1 with increasing Li + ion concentration, suggesting an improvement in ionic conduction capacity. In terms of electrochemical performance, the gel containing 10 % by mass of cellulose acetate and 1.4 M of LiClO 4 emerged as the most promising. It exhibited a conductivity of 2.3 × 10 -4 S.cm -1 at 25 °C and 3.0 × 10 -4  S.cm -1 at 80 °C. Additionally, it demonstrated an ideal shape of cyclic voltammetry curves and stability after 400 cycles, establishing its suitability as an electrolyte in electrochemical devices., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)

Published
2024
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