Chemically Modified Carbon Paste Electrodes
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Chemically-Activated Biochar from Ricinus communis L. Cake and Their Potential Applications for the Voltammetric Assessment of Some Relevant Environmental Pollutants
Biochar is a rich-carbon material highly functionalized, which allows the use as electrodes modifier for preconcentration and voltammetric determination of several species. This work describes a castor cake biochar production and chemical activation with different reaction conditions using HNO3 and/or H2O2. Biochar samples were characterized using scanning e
J. Braz. Chem. Soc.. Publicado em: 2020-05
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2. Synthesis of Hydrotalcite-Supported CdTe Semiconductor Nanocrystals for Electrochemical Detection of Ciprofloxacin
In this work, CdTe quantum dots (QDs) were controllably grown onto the surface of layered double hydroxide (LDH) aiming to develop a sensitive and selective method for the electrochemical detection of ciprofloxacin (CPX). Emission and absorption spectroscopy results as well as high-resolution transmission electron microscopy (HRTEM) images evidenced the form
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
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3. Eletrodo íon-seletivo de pasta de carbono para determinação de cobre baseado em um novo Lariat-éter coroa.
Sensores potenciométricos são conhecidos por sua alta sensibilidade e seletividade. Tais sensores apresentam versatilidade, baixo custo e robustez, o que garante a esses sensores aplicabilidade em uma grande variedade de amostras químicas complexas. Os eletrodos íon-seletivos de membrana polimérica são os sensores potenciométricos mais conhecidos, por
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 201103
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4. Desenvolvimento e caracterização de sensores quimicamente modificados para análise de sulfeto / Development and characterization of chemically modified sensors for analysis of sulfide
The developmental impulse of the present time has caused a continuous degradation of the environment, which increases the need of monitoring the contaminant levels launched in the natural water courses and industrial effluents. In this context, it is crucial to develop new methodologies of determination and quantification of various types of pollutants, with
Publicado em: 2010
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5. Graphite Functionalized in Conditions of Friedel-Crafts Reaction mediated by Radiation of Microwave: New Material for Construction of Electrodes of Carbon Paste / Grafite funcionalizada em condições de Friedel-Crafts mediada por radiação de microondas: novo material para construção de eletrodos de pasta de carbono
Modification and/or functionalization of eletrodic materials have been investigated in order to improve the application of chemically modified electrode (CME) regards on their sensitivity, selectivity and reactivity comparing with unmodified substrate. However, the stability and reproducibility of these CME are one of the most important goals to achieve main
Publicado em: 2007
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6. STUDY OF THE ELECTROCHEMICAL BEHAVIOR OF SAME CALIXARENES IN THE PRESENT OF IONS METALS / ESTUDO DO COMPORTAMENTO ELETROQUÍMICO DE ALGUNS CALIXARENOS EM PRESENÇA DE ÍONS METÁLICOS
The study of the electrochemical behavior of electrodes of carbon paste chemically modified with the following calixarenes: 4-sulf- calix[4]arene and 4-terc-butilcalix[4,6,8]arene was investigated in the present of cations (Sb3+, Se4+, Mn2+, Cd2+, Zn2+, Cu2+, Pb2+, V4+ and V5+) using differential pulse , square wave and cyclical voltammetry. Other electroche
Publicado em: 2005
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7. Oxido misto de SiO2/SnO2,SiO2/SnO2/Fosfato : propriedades e aplicações / The SiO2/SnO2, SiO2/SnO2/fosfato mixed oxide : properties and applications
The present work describes the preparation of SiO2/SnO2 mixed oxide obtained by the sol-gel processing method with Sn compositions (in wt %) of 4, 13 and 18%. The high specific surface and the presence of Lewis and Brfnsted acid sites, constitutes an interesting substrate for preparing new classes of chemically modified electrodes. In a specific application,
Publicado em: 2005