| Texto completo | |
| Autor(es): |
Kavai, Mathias Stahl
;
de Lima, Lucas Felipe
;
de Araujo, William Reis
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Materials Letters; v. 330, p. 4-pg., 2023-01-01. |
| Resumo | |
A novel and inexpensive laser-scribed graphene (LSG) sensor using polyetherimide (PEI) substrate was fabricated using CO2 laser. The material was characterized by scanning electron microscopy (SEM), Raman spectroscopy, and electrochemical techniques, demonstrating a high porous carbonaceous material, which resulted in an electroactive area with 2.4-fold enhancement compared to geometric area and a high heterogeneous electron transfer rate constant (k degrees) of 3.20 x 10-2 cm/s for ferricyanide redox probe. As a proof of applicability, the LSG-PEI sensor was applied for simultaneous detection of hydroquinone (HQ), paracetamol (PA), and methylparaben (MP) emerging pollutants (EP) in tap water and natural (lake) water samples, providing recoveries between 93.1 % and 118 % with limits of detection of 9.42 x 10-8, 3.23 x 10-7, and 2.95 x 10-7 mol/L for HQ, PA, and MP, respectively. (AU) | |
| Processo FAPESP: | 18/08782-1 - Sensores químicos miniaturizados e integrados: novas plataformas de fabricação para aplicações biológicas, clínicas e ambientais |
| Beneficiário: | Mauro Bertotti |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |