Graphite Electrodes
Mostrando 13-24 de 57 artigos, teses e dissertações.
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13. A systematic study on electrolytic production of hydrogen gas by using graphite as electrode
Alkaline water electrolysis is one of the easiest methods for hydrogen production that has the advantage of simplicity. The major challenges in the water electrolysis are the reduce energy consumption, cost and maintenance and to increase reliability, durability and safety. In this regard, the electrolytic production of hydrogen is systematically studied by
Mat. Res.. Publicado em: 24/09/2013
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14. Tratamento eletroquÃmico de esgotos sanitÃrios / Electrochemical Treatment for Municipal Sewage
Basic sanitation is a public service with the most deficiency in infrastructure in Brazil, in particular the service of collection and treatment of sewage followed by collection services and waste treatment. The scenary of sanitation in Brazil, especially in the big cities, it becomes increasingly costly and challenging because the population is increasingly
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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15. A Biosensor Using Poly(4-Aminophenol)/acetylcholinesterase modified graphite electrode for the detection of dichlorvos
The properties of poly(4-aminophenol) modified graphite electrode as material for the immobilization of acetylcholinesterase were investigated by the Cyclic Voltammetry, Electrochemical Impedance Spectroscopy and Atomic Force Microscopy. The polymer was deposited on graphite electrode surface by the oxidation of 4-aminophenol and then acetylcholinesterase wa
Brazilian Archives of Biology and Technology. Publicado em: 2011-12
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16. Potencialidade da célula combustível microbiana para geração de energia elétrica a partir de esgoto sanitário / Potential microbial fuel cell to generate electricity from wastewater
O presente projeto avaliou uma célula combustível microbiana (CCM) composta de um reator combinado (anaeróbio e aeróbio), operada em fluxo contínuo com tempo de detenção hidráulico de 12 horas, alimentada com esgoto sintético (487 + OU -115 mg DQO/L) e esgoto sanitário (631 + OU -213 mg DQO/L). A estabilidade da CCM variou conforme as característi
Publicado em: 2011
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17. Determination of 5-aminosalicylic acid in pharmaceutical formulations by square wave voltammetry at pencil graphite electrodes
An analytical method for the determination of the anti-inflammatory drug 5-aminosalicylic acid (5-ASA) in pharmaceutical formulations using square wave voltammetry at pencil graphite electrodes was developed. After the optimization of the experimental conditions, calibration curves were obtained in the linear concentration range from 9.78 × 10-7 to 7.25 ×
Química Nova. Publicado em: 2010
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18. Desenvolvimento, caracterização e aplicação eletroanalítica de um compósito fluido de adesivo epóxi, grafite e ciclo-hexanona
A fluid conducting composite material prepared from graphite powder, commercial epoxy resin Araldite®, and cyclohexanone has been developed. The composition was optimized considering the mechanical properties as conductivity and adhesiveness using response surface methodology. This work employed cyclic voltammetry and amperometry to investigate the characte
Química Nova. Publicado em: 2010
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19. Desenvolvimento de biossensores eletroquímicos, utilizando matriz polimérica modificada com biomoléculas, para o diagnóstico de câncer de próstata e hepatite C
The development of biologic sensors has become a wide activity in science seeking mainly health and environmental issues. The biosensor development in laboratory has been investigated by many researchers seeking sensitivity, specific, low cost and portable devices. The electrochemical techniques are used in the largest number of works due to the easiness in
Publicado em: 2010
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20. Otimizaçâo das condições de preparação de eletrodos à base de carbono cerâmico utilizando-se planejamento fatorial
Different parameters of carbon ceramic electrodes (CCE) preparation, such as type of precursor, carbon material, catalyst amount, among others, significantly influence the morphological properties and consequently their electrochemical responses. This paper describes a 2³ factorial design (2 factors and 3 levels with central point replicates), which the fac
Química Nova. Publicado em: 2010
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21. Estudo da interação de íons cobre e cromo com eletrodos de pasta de carbono modificada e polianilina em meio aquoso por técnica de voltametria de pulso diferencial / Modified Carbon Paste Electrodes and Polyaniline Electrodes: Study of their interaction with copper and chromium aquous metallic ions by Differential Pulse Voltammetry
The electrochemical sensors to measure metallic ions in water and waste water are among the most important areas of research nowadays. The environmental control and monitoring chalenges that stimulated the aim of this work are tanification for industrial leather finishing and cuprous and cupric organic and inorganic fungicides. The features for characterizat
Publicado em: 2010
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22. Eletrodos modificados com agentes biológicos por diferentes procedimentos de imobilização
A carbon paste electrode modified with enzyme laccase productNovozym 51.003 has been proposed in this manuscript. This enzyme catalyzesthe oxidation of different types of phenols compounds, and lignin aminefunctional groups engaged. This enzyme has been among the most applied inthe construction of biosensor amperometric Electrical. The effect of laccaseamoun
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/11/2009
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23. Giant superconducting proximity effect in graphite / Efeito de proximidade gigante entre supercondutor e grafite
In order to verify the existence of superconducting correlations in graphite, in this work we studied the possibility of the so-called giant proximity effect in highly oriented pyrolytic graphite (HOPG) samples. Magnetoresistance measurements performed on various thoroughly characterized HOPG samples with attached superconducting In or Pb-In electrodes revea
Publicado em: 2009
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24. Avaliação da potencialidade de eletrodos compósitos à base de grafite/poliuretana modificados com hexacianoferratos de Cu(II), Co(II) e Fe(III) para fins analíticos / Evaluation of the analytical potentialities fo composites electrodes based on graphite/polyurethane modified with hexacyanoferrates of Cu(II), Co(II) and Fe(III)
Eletrodos compósitos à base de grafite/poliuretana foram preparados contendo diferentes quantidades de hexacianoferratos de cobre(II), cobalto(II) e ferro(III). Os complexos foram preparados de acordo como procedimentos descritos na literatura e caracterizados por análise elementar, análise térmica e espectrometria na região do infra-vermelho. A análi
Publicado em: 2009