Oxidation Electrochemistry
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Electrochemical Behavior of Unusual Dimeric Flavonoids Isolated from Fridericia platyphylla
Brazil has the greatest plant diversity on the planet, distributed in different types of biomes. These plants are important sources of biologically active natural products, which are derived from various drugs marketed worldwide. This paper presents an electrochemical study of three unusual dimeric flavonoids, pharmacologically active, isolated and identifie
J. Braz. Chem. Soc.. Publicado em: 2021-06
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2. MAGNETOMETRIA IN-SITU PARA CARACTERIZAÇÃO DE MATERIAIS ELETRODEPOSITADOS
We have recently made studies of electrodeposits of Co onto graphene attached to different substrates, successfully performed via in-situ magnetization measurements. The magnetic analysis of deposits as a function of time lapse, indicate that Co grows with different magnetic characteristics from the beginning to the end of each run, independent of the substr
Quím. Nova. Publicado em: 18/07/2019
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3. Bioelectrooxidation of Ethanol Using NAD-Dependent Alcohol Dehydrogenase on Oxidized Flexible Carbon Fiber Arrays
Hierarchical 3-dimensional flexible carbon fiber (FCF) array is a candidate as flexible electrode for enzyme electrochemistry, with interesting properties for application in enzymatic biofuel cell and implantable biosensors. Here, we show the fabrication of oxidized FCF electrode (FCFO) based on chemical surface treatment, a wet oxidation method by using per
J. Braz. Chem. Soc.. Publicado em: 2017-09
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4. Degradation of the Dye Reactive Blue 4 by Coupled Photoassisted Electrochemistry at DSA®-Type Electrode
We investigated the photoelectrochemical oxidation of the dye Reactive Blue 4 in the presence of a DSA®-type electrode of nominal composition Ti/Ru0.3Ti0.7O2 under ultraviolet radiation, aiming to enhance the degradation yields of this dye. We conducted the photoelectrocatalytic treatment under galvanostatic control, using an 80 W mercury vapor lamp as the
J. Braz. Chem. Soc.. Publicado em: 2016-05
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5. Flavonoid electrochemistry: a review on the electroanalytical applications
Flavonoids are polyphenolic compounds widespread in vegetal kingdom. They present a C-15 skeleton, which is divided into three units A, B and C. Unit C is an oxygen containing heterocyclic, whose oxidation state and saturation level define major subclasses. Units A and B are aromatic rings, in which four major types of substituents, i. e. hydroxyl, methoxyl,
Rev. bras. farmacogn.. Publicado em: 10/05/2013
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6. Estudos eletroquímicos e fundamentais da reação de oxidação de etanol / Electrochemistry and fundamentals study of the oxidation ethanol reaction
O desenvolvimento de sistemas eletroquímicos que produzam energia limpa, a baixo custo, além de contribuir com a redução dos problemas de saúde, esses causados pelo uso indiscriminado dos atuais combustíveis, tem despertado o interesse em compreender a reação de oxidação eletroquímica do etanol para emprego em sistemas de energia. O contexto abord
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/01/2012
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7. Eletrocatálise utilizando líquidos iônicos e consumo químico de óxidos / Electrocatalysis using ionic liquids and chemical comsumption of platinum oxides
This dissertation is divided on two parts. The first one deals with fundamental electrochemistry employing an ionic liquid as supporting electrolyte and as a subject of study by itself. Phenomena like the anodic and cathodic stability of the liquid, emphasizing its degradation mechanism is presented. It is also shown a study of the electrocatalytic oxidation
Publicado em: 2009
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8. Estudos de sistemas micelares usando voltametria com microeletrodos / Studies of micellar systems with microelectrode voltammetry
Voltammetry with platinum disc microelectrodes was employed to gain information on diffusion coefficients, D, of micelles in aqueous solution. Owing to the low solubility in water and high affinity for the micellar core, ferrocene was used as electroactive probe. Diffusion coefficients of hexadecyl trimethyl ammonium bromide (C16TABr) were determined in solu
Publicado em: 2008
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9. SÃntese e caracterizaÃÃo da alumina para dosimetria termoluminescente
Carbon-doped aluminum oxide (J-Al2O3:C) is an important material for the dosimetry of ionizing radiation using a thermoluminescent readout. This material presents a sensibility to radiation that is 50 times more sensitive than LiF:Mg,Ti. However, its fabrication usually employs crystal growing methods and high temperature laboratory infra-structure and highl
Publicado em: 2008
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10. Chemometric methods in the electrochemical studies of phenols on boron-doped diamond films / Metodos quimiometricos em estudos eletroquimicos de fenois sobre filmes de diamante dopado com boro
The subject of this work is the application of chemometric methods in the analysis of the data obtained from electrochemical measurements of phenol compounds on boron-doped diamond electrodes (BDD). BDD films were grown from ethanol and characterized using different techniques. These materials showed good electrochemical qualities. A comparison between BDD a
Publicado em: 2007
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11. Degradation of the hormone estradiol by electrolysis, photolysis and photoelectrocatalysis / Degradação do hormônio estradiol por eletrólise, fotólise e fotoeletrocatálise
Neste projeto investigou-se o uso de três técnicas: (i) eletrólise, (ii) fotoeletrocatálise e (iii) fotólise, na degradação do hormônio estradiol, comumente encontrado nos esgotos domésticos, e que geram sérias preocupações com a ação nefasta que podem provocar na vida selvagem e humana. Os ensaios eletroquímicos foram realizados sobre eletrod
Publicado em: 2007
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12. Electrochemistry control of humic acid and algae using a reactor with diamond film electrode / Controle eletroquimico de acido humico e algas usando um reator com eletrodo de filme de diamante
The presence of humic acids and algae in supplying water and swiming pools may be harmful to the health. This work reports the results obtained in electrooxidation of humic acid and algae using a boron doped diamond (BDD) anode. In this treatment, the solution is percolated through a filter press reactor with a BDD anode polarized at constant current. The ef
Publicado em: 2007