Moraes, BiancaCosta, Alexandra I.Barata, PatríciaPrata, José V.2021-11-292021-11-292021MORAES, Bianca; [et al] – Carbon dots synthesis from coffee grounds, and sensing of nitroanilines. Chemistry Proceedings. ISSN 2673-4583. Vol. 3 (2021), pp. 1-62673-4583http://hdl.handle.net/10400.21/14028Este 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/ISELFluorescent 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.engCarbon dotsCoffee groundsFluorescenceMicrowaveSensorNitroanilinesPollutantsconference object10.3390/xxxxx