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Orientador(es)
Resumo(s)
Fluorescent carbon dots (C-dots) were directly synthesized by a sustainable and eco friendly one-pot microwave-assisted hydrothermal carbonization method from coffee grounds waste. The coffee grounds obtained from automatic coffee machines, after being heated at 190 °C for 1–4 h in the presence of nitrogen additives, furnished the desired carbon nanomaterials. Struc tural and photophysical properties of the as-synthesized nanomaterials were evaluated by FTIR, 1H NMR, UV-Vis, and fluorescence spectroscopies. The ability of the C-dots to behave as probes for isomeric nitroanilines (ortho-, meta- and para-nitroaniline) was explored through fluorimetric titra tion experiments. High sensitivities and selectivities were obtained for the detection of nitroanilines in aqueous media.
Descrição
Este trabalho foi financiado pelo Concurso Anual para Projetos de Investigação, Desenvolvimento, Inovação e Criação Artística (IDI&CA) 2020 do Instituto Politécnico de Lisboa. Código de referência IPL/2020/DotCoffee/ISEL
Palavras-chave
Carbon dots Coffee grounds Fluorescence Microwave Sensor Nitroanilines Pollutants
Contexto Educativo
Citação
MORAES, Bianca; [et al] – Carbon dots synthesis from coffee grounds, and sensing of nitroanilines. Chemistry Proceedings. ISSN 2673-4583. Vol. 3 (2021), pp. 1-6
Editora
MDPI