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

Ferreira, Priscila Alves ; Backes, Rafael ; Martins, Cauê Alves ; de Carvalho, Cláudio Teodoro ; da Silva, Rodrigo Amorim Bezerra

Electroanalysis (New York, N.Y.), 2018-10, Vol.30 (10), p.2233-2236 [Periódico revisado por pares]

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Título:
Biochar: A Low‐cost Electrode Modifier for Electrocatalytic, Sensitive and Selective Detection of Similar Organic Compounds
Autor: Ferreira, Priscila Alves ; Backes, Rafael ; Martins, Cauê Alves ; de Carvalho, Cláudio Teodoro ; da Silva, Rodrigo Amorim Bezerra
Assuntos: Biochar ; drop coating ; palm residue ; sensor ; voltammetry
É parte de: Electroanalysis (New York, N.Y.), 2018-10, Vol.30 (10), p.2233-2236
Descrição: 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.
Idioma: Inglês

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