Graphite Electrodes
Mostrando 1-12 de 57 artigos, teses e dissertações.
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1. Graphite-Polyurethane Composite Electrode Modified with Molecularly Imprinted Polymer for Determination of Diclofenac
A molecularly imprinted polymer (MIP) was prepared using the anti-inflammatory diclofenac (DCF) as a template. A non-imprinted polymer (NIP) was also prepared as a control. These MIP and NIP were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET), revealing a higher porosity in the fir
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. A New Electrochemical Platform Based on a Polyurethane Composite Electrode Modified with Magnetic Nanoparticles Coated with Molecularly Imprinted Polymer for the Determination of Estradiol Valerate in Different Matrices
A polyurethane composite electrode modified with magnetic nanoparticles (mag; Fe3O4) coated with molecularly imprinted polymers (MIPs) was developed for the electrochemical determination of estradiol valerate. Chemical and morphological analyses of the mag-MIP were performed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (E
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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3. Removal of organic matter from pre-treated domestic sewage in anaerobic biological reactor by a combined system of electrolytic and biological aerobic treatment
Resumo Os processos biológicos são os métodos mais difundidos para o tratamento de águas residuárias. No entanto, eles têm limitações para degradar poluentes tóxicos e refratários, contaminantes, que os processos eletroquímicos podem remover. Portanto, o objetivo da pesquisa foi verificar a possibilidade de tratamento de esgoto por um processo bio
Rev. Ambient. Água. Publicado em: 22/07/2019
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4. Electrode Material Containing Graphite Incorporated to an Amino-Functionalized Polydimethylsiloxane Network for the Detection of Copper
Graphite was incorporated to a polydimethylsiloxane (PDMS) polymer network functionalized with amino groups to obtain an electrode material and used to detect copper ions in aqueous solutions and sugarcane spirit. The polymer network was prepared with PDMS, 3-aminopropyl-trimethoxysilane (APTMS), tetraethyl orthosilicate (TEOS) with addition of graphite to o
J. Braz. Chem. Soc.. Publicado em: 2018-08
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5. Efecto electrocatalítico de nanopartículas bimetálicas de Ag y Cd hacia la reducción de iones nitrato y/o nitrito
ABSTRACT The electrocatalytic effect of Cd-Ag bimetallic nanoparticles supported on highly oriented pyrolytic graphite (HOPG) and vitreous carbon (VC) substrates was evaluated for the nitrate and/or nitrite ions reduction reaction. For this, in a first stage, the metallic and bimetallic deposits were obtained on the carbonaceous substrates (CS) using the ele
Matéria (Rio J.). Publicado em: 19/07/2018
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6. ANÁLISE POR INJEÇÃO SEQUENCIAL COM DETECÇÃO POR VOLTAMETRIA DE ONDA QUADRADA PARA DETERMINAÇÃO DE As(III) EM AMOSTRAS DE ÁGUAS USANDO ELETRODO DE OURO
A sequential injection method with square wave anodic stripping voltammetry (SI-SWASV) using screen printed and crystalline gold electrode was developed for determination of As(III). The carrier solution used for electrode conditioning and stripping medium was composed of 0.050 mol L-1 HCl, whereas the supporting electrode for samples (deposition medium) was
Quím. Nova. Publicado em: 2018-01
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7. Characterization and Evaluation of Silver-Nanoparticle-Incorporated in Composite Graphite Aiming at their Application in Biosensors
Abstract Biosensors based on nanomaterial composites have been investigated for their potential to function as high sensitivity signal response devices. In the present study, we report the fabrication of silver nanoparticles (AgNPs) on a graphite epoxy composite electrode (GEC) and mixed with the polyaniline (a conductive emeraldine salt form polymer) compos
Braz. J. Chem. Eng.. Publicado em: 2017-07
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8. Low Potential and Non-Enzymatic Hydrogen Peroxide Sensor Based on Copper Oxide Nanoparticle on Activated Pencil Graphite Electrode
An electrochemical sensor for H2O2 determination was prepared by electrodepositing copper oxide nanoparticles on the activated pencil graphite electrodes. At first, a study has been made of the optimum conditions for chemical activation of the pencil graphite electrodes (APGE) and then the activated pencil graphite electrode was modified with copper oxide na
J. Braz. Chem. Soc.. Publicado em: 2017-05
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9. Multilayer Graphene Films Obtained by Dip Coating Technique
A dip coating system was projected and constructed to deposit a large range of thin films onto solid substrates. A microcontroller was used to control the deposition system. As an example of application multilayer graphene (MLG) films were deposited onto glass slices in order to obtain conductive films with relatively good light transmittance. The MLG flakes
Mat. Res.. Publicado em: 2015-08
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10. Electrochemical Oxidation of Landfill Leachate: Investigation of Operational Parameters and Kinetics Using Graphite-PVC Composite Electrode as Anode
The preparation of a new carbon composite electrode constructed from graphite-polyvinyl chloride (graphite-PVC) compressed mixtures was used for the first time to treat landfill leachate in Malaysia under electrochemical oxidation. The electrochemical oxidation of landfill leachate was studied on graphite-PVC and Pt electrodes as anode and cathode, respectiv
J. Braz. Chem. Soc.. Publicado em: 2015-05
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11. Construção de eletrodo de grafite retirado de pilha comum: aplicações didáticas
This paper presents a proposal for using recycled graphite electrodes obtained from exhausted commercial 1.5 V batteries and its application in electroanalysis. The electrode could be prepared by the students and applied in the simple didactic experiments suggested, such as determination of active electrode area, cyclic voltammetry and useful potential range
Quím. Nova. Publicado em: 2014-07
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12. Individual and simultaneous square wave voltammetric determination of the anticancer drugs emodin and irinotecan at renewable pencil graphite electrodes
Um método versátil e com rápida sensibilidade para a determinação individual e simultânea das drogas anticancerígenas emodina (Em) e irinotecano (Irino) em fluidos biológicos baseados na voltametria de onda quadrada (SWV) utilizando um eletrodo de grafite de lápis renovável (PGE), foi investigado. A acumulação adsortiva controlada de Em e Irino n
J. Braz. Chem. Soc.. Publicado em: 2013-10