Sodium Borohydride
Mostrando 1-12 de 107 artigos, teses e dissertações.
-
1. Silver nanoparticles incorporated PVC films: evaluation of structural, thermal, dielectric and catalytic properties
Abstract In this work, silver nanoparticle – polyvinylchloride (SNC-PVC) composites were synthesized by loading 2.5% to 10.0% silver ions to PVC using simple solution casting technique. Material properties including dielectric, thermal stability were discussed in some detail. Incorporation of silver nanoparticles (SNPs) in the PVC matrix was confirmed by U
Polímeros. Publicado em: 03/10/2019
-
2. Preparation and application of Zero Valent Iron immobilized in Activated Carbon for removal of hexavalent Chromium from synthetic effluent
RESUMO Diferentemente dos contaminantes orgânicos, os metais pesados não são biodegradáveis e tendem a se acumular nos organismos vivos e também são reconhecidos por serem tóxicos ou carcinogênicos. A utilização de nanopartículas de ferro zero valente (nFVZ) é relatada como uma técnica alternativa e de elevado potencial para remediação in situ
Rev. Ambient. Água. Publicado em: 03/10/2019
-
3. Aplicação de método estatístico no estudo da influência do peróxido de hidrogênio e do borohidreto de sódio na síntese de nanoparticulas de prata (AGNPS)
RESUMO Nanomateriais vem atraindo bastante atenção nos últimos anos em virtude das suas propriedades que permitem aplicações em diversas áreas como: química, física, medicina, fármacos e engenharias. No universo dos nanomaterias, as nanopartículas de prata (AgNPs) tem despertado o interesse de vários pesquisadores devido ao seu potencial bacterici
Matéria (Rio J.). Publicado em: 16/09/2019
-
4. Addition of CeO2 Nanorods in PtSn-Based Electrocatalysts for Ethanol Electrochemical Oxidation in Acid Medium
This work describes the preparation of Pt/C, PtxSny/C and PtxSny(CeO2 nanorods/C) nanoparticle catalysts synthesized by the chemical reduction method via sodium borohydride for the ethanol oxidation reaction. Using X-ray diffractogram analysis, it was verified that no alloy formation occurred between platinum (Pt) and tin (Sn). The distribution of the nanopa
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
-
5. Thermal, dielectric and catalytic behavior of palladium doped PVC films
Abstract The present paper discusses the aspects of synthesizing palladium (Pd) doped (Pd+2 and Pd0) poly(vinyl chloride) (PVC) using simple solution cast technique. The Pd loading to PVC was altered from 2.5% to 10.0% and the material properties were studied using UV-Visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Energy-dispersive X-ray spectroscop
Polímeros. Publicado em: 04/07/2019
-
6. Human Hair as Adsorbent of Palladium(II) in Solution: A Precursor of Well-Dispersed Size-Controlled Pd Nanoparticles
This work describes, for the first time, the preparation of palladium nanoparticles supported in thermally-treated human hair. Human hair showed to be an efficient adsorbent of Pd2+ in aqueous media, reaching nearly 100% of adsorption from a 100 ppm solution. The thermal treatment of hair containing Pd2+ at 200 ºC under nitrogen atmosphere led to the format
J. Braz. Chem. Soc.. Publicado em: 2019-04
-
7. Ag Nanoparticles-Based Zinc Hydroxide-Layered Hybrids as Novel and Efficient Catalysts for Reduction of 4-Nitrophenol to 4-Aminophenol
Silver nanoparticles and zinc hydroxide-layered hybrid materials (AgNPs/ZHL) have been successfully developed as efficient catalysts for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with sodium borohydride. A facile and rapid visible-light assisted green route was used for the deposition of silver nanoparticles (AgNPs) on the external surfac
J. Braz. Chem. Soc.. Publicado em: 2017-01
-
8. NANOPARTÍCULAS DE Au EM LÍQUIDO IÔNICO SUPORTADAS EM FILMES BIOPOLIMÉRICOS: UMA AULA PRÁTICA PARA INVESTIGAÇÃO DA ATIVIDADE ANTIMICROBIANA
The synthesis of Au nanoparticles (NPs) in ionic liquid (IL) supported on biopolymers films applied in the investigation of antimicrobial activity was introduced as a new experimental practice for undergraduates in the nanotechnology discipline at the Department of chemistry, at University Federal of Rio Grande- FURG. The Au NPs were synthesized by reduction
Quím. Nova. Publicado em: 2016-09
-
9. Melting Behaviour of Bi1-xSbx Free Standing Alloy Nanoparticles Synthesized via Solvothermal Route
The present investigation aims at understanding the effect of size on melting behaviour of free standing alloy nanoparticles. Alloy nanoparticles of Bi1-xSbx (x=0.12, 0.25, 0.50 and 0.75) have been synthesized by solvothermal route using sodium borohydride (NaBH4) as a reducing agent. The samples were characterized by X-ray diffraction (XRD) and transmission
Mat. Res.. Publicado em: 17/11/2015
-
10. A conservation law for self-hydrolysis process of aqueous sodium borohydride
A conservation law is obtained for self-hydrolysis process of aqueous sodium borohydride, which gives an explicit relationship between the concentrations of NaBH4 and hydrogen ions during the global reaction.
Matéria (Rio J.). Publicado em: 2014-12
-
11. Preparação de nanopartículas de prata e ouro: um método simples para a introdução da nanociência em laboratório de ensino
A new practical experiment involving silver and gold nanoparticle syntheses was introduced in an inorganic chemistry laboratory course for undergraduate students at the Institute of Chemistry, UNICAMP. The nanoparticles were synthesized by the reduction of silver nitrate and tetrachloroauric acid with sodium borohydride and sodium citrate in an aqueous mediu
Quím. Nova. Publicado em: 2012
-
12. Síntese, caracterização e estabilização de nanopartículas de prata para aplicações bactericidas em têxteis / Synthesis, caracterization and stabilization of silver nanoparticles for bactericidal aplication in textiles
This work aimed the study of silver nanoparticles synthesized by chemical reduction to their application in textiles, exploiting the bactericidal power of metallic silver. After an introduction to nanotechnology, colloidal stabilization of nanoparticles and the properties of silver as a bactericidal agent, it was discussed the methods of synthesis by reducti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/06/2011