Carbon Paste Electrode Modified with Biochar for Sensitive Electrochemical Determination of Paraquat

Kalinke, Cristiane; Mangrich, Antônio S.; Marcolino‐Júnior, Luiz H.; Bergamini, Márcio F.

doi:10.1002/elan.201500640

Cited by 49 publications

(25 citation statements)

References 31 publications

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“…In less number, BC or nanoparticle decorated BC has been proposed in electroanalysis as a modifier for carbon paste electrodes for determination of traces of heavy metals lead , cadmium , copper , zinc and nickel by anodic stripping voltammetry. Moreover, the adsorptive ability of BC has been explored for the spontaneous pre‐concentration on the electrode surface and single determination of organic compounds such as paraquat and methil parathion by adsorptive stripping voltammetry.…”

Section: Figurementioning

confidence: 99%

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Biochar: A Low‐cost Electrode Modifier for Electrocatalytic, Sensitive and Selective Detection of Similar Organic Compounds

et al. 2018

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This work proposes for the first time the use of biochar (BC) as a cost‐effective electrode modifier for simultaneous electroanalysis of similar organic compounds. BCs were prepared from Babassu petiole pyrolysis at five temperatures (500–900 °C) and characterized by FTIR, SEM, TG‐DTA and BET., which presented amorphous shapes with relative high surface areas (280–396 m2 g−1) and polar surface groups (T<700 °C). As a proof of concept, BC‐modified glassy carbon electrodes (BC/GCE) were studied using ferrocyanide probe and evaluated towards the simultaneous detection of catechol and hydroquinone (isomers), levofloxacin and norfloxacin (analogous structure), and tert‐butylhydroquinone and butylated hydroxyanisole. In all cases, BC improved the peak‐to‐peak separation, sensitivity and electrocatalytic activity, which highlights BC as a promising modifier to be used in simultaneous determinations of organic compounds with similar peak potentials.

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Section: Figurementioning

confidence: 99%

“…analysis, where were found 280.4 and 396.2 m 2 g −1 for BC500 and BC900, respectively (Table S1). It is worth noticing that such BCs show remarkable surface areas and large pore diameter in comparison to BCs prepared from other biomass sources (Table S1).…”

Section: Figurementioning

confidence: 99%

Biochar: A Low‐cost Electrode Modifier for Electrocatalytic, Sensitive and Selective Detection of Similar Organic Compounds

et al. 2018

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“…A literatura relata que essa capacidade adsortiva do biocarvão pode ser potencialmente melhorada por meio de um processo de ativação, geralmente empregando agentes químicos (KALINKE et al, 2017;OLIVEIRA et al, 2017;LANG; (GEVAERD et al, 2016;KALINKE et al, 2016). As condições de leitura voltamétrica mais favoráveis para a intensificação do sinal analítico foi em meio eletrolítico de tampão BR pH 6,0.…”

Section: Introductionunclassified

Ácidos Graxos Vegetais: Composição Química, Atividade Biológica E Potencial Biotecnológico

Santos¹,

Lima²,

Castro³

2021

Trabalhos Nas Áreas De Fronteira Da Química 2

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Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica. A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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“…14 Chemical activation is based on formation of functional groups at carbonaceous surface by use of chemical agents such as nitric acid, 15 sodium hydroxide, 16 hydrogen peroxide, 17 hydrochloric acid, 18 sulfuric acid, 19 potassium permanganate 20 and others as reported by several authors. 21,22 Besides of agricultural use of biochar, several papers [23][24][25][26] describing its use for construction of voltammetric sensors have been recently reported. These electroanalytical methods are based on spontaneous sorption ability of high functionalized biochar surface for organic and inorganic species.…”

Section: Introductionmentioning

confidence: 99%

Chemically-Activated Biochar from Ricinus communis L. Cake and Their Potential Applications for the Voltammetric Assessment of Some Relevant Environmental Pollutants

Kalinke

Oliveira

Mangrich

et al. 2020

J. Braz. Chem. Soc.

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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 HNO 3 and/or H 2 O 2 . Biochar samples were characterized using scanning electron microscopy, energy dispersive spectroscopy, thermogravimetric analysis, Fourier-transform infrared spectroscopy, Raman and zeta potential. Carbon paste modified electrodes (CPME) have been constructed using different biochar samples to evaluate the adsorptive capacity for the spontaneous preconcentration and voltammetric determination of Pb 2+ , Cd 2+ , Cu 2+ and Ni 2+ ions, paraquat and methyl parathion pesticides. The activation treatments promoted modifications in the elemental, morphological and structural biochar characteristics. Activated biochar CPMEs showed increase in the current signal around 15 and 2.5 times higher than unmodified and precursor biochar electrode, respectively. N2 sample (HNO 3 , 60 °C for 3.0 h) presented the better response signals for all compounds. This was attributed to the more effective surface oxidation, promoting a high porosity, acid character and amount of acid functional groups. Besides that, this greater analytical response allows the CPME-N2 application as a passive sampler for the voltammetric determination of inorganic and organic contaminants for environmental management in aqueous matrices.

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Carbon Paste Electrode Modified with Biochar for Sensitive Electrochemical Determination of Paraquat

Cited by 49 publications

References 31 publications

Biochar: A Low‐cost Electrode Modifier for Electrocatalytic, Sensitive and Selective Detection of Similar Organic Compounds

Biochar: A Low‐cost Electrode Modifier for Electrocatalytic, Sensitive and Selective Detection of Similar Organic Compounds

Ácidos Graxos Vegetais: Composição Química, Atividade Biológica E Potencial Biotecnológico

Chemically-Activated Biochar from Ricinus communis L. Cake and Their Potential Applications for the Voltammetric Assessment of Some Relevant Environmental Pollutants

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