Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04
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pISSN : 1976-4251 / eISSN : 2233-4998
- https://journal.kci.go.kr/carbon
KJCKorea
Journal Central
Green synthesis of carbon nanodots from agro-industrial residues
- Carbon Letters
- Abbr : Carbon Lett.
- 2022, 32(1), pp.131-141
- DOI : 10.1007/s42823-021-00260-3
- Publisher : Korean Carbon Society
- Research Area : Natural Science > Natural Science General > Other Natural Sciences General
- Received : February 10, 2021
- Accepted : May 26, 2021
- Published : January 1, 2022
Afonso Allan Jr. Gonçalves 1, Aquino Felipe Thomaz 2, Dalmônico Gisele M. L. 3, Nascimento Matheus V. 4, Wrasse Ernesto 1, de Aguiar Kelen M. F. Rossi 1
1Polymers and Nanostructures Research Group (GPAN), Federal University of Technology, Paraná (UTFPR), Toledo, Brazil
2Federal University of Mato Grosso (UFMT), Cuiabá, Brazil
3National Laboratory of Nanotechnology (LNNano- CNPEM), Campinas, Brazil
4Programa de Pós-Graduação Em Odontologia (PPGO), Federal University of Ceará (UFC), Fortaleza, Brazil
Accredited
ABSTRACT
Fluorescent nanostructures based on carbon, or carbon dots, are attracting much attention and interest because of their diverse properties which can be applied in several fields of knowledge, such as optics, biomedicine, environmental research, among others. Such properties are in part, derived from its intrinsic luminescence from tunable functional groups. In this work, we produced carbon nanodots (CND) using agro-industrial residues, such as Lolium perenne and malt bagasse. The methods used were conventional hydrothermal syntheses and microwave-assisted hydrothermal synthesis. To the best of our knowledge, this is the first time that carbon dots synthesized from this ryegrass type are reported. The synthesis methods were one step (no catalyst, base, or acid were added for passivation), and the functional groups responsible for the luminescence and high solubility in water were identified by infrared spectroscopy, being mainly C=O, C–OH, C–N, and N–H. According to our theoretical studies, the C=O group introduced a new energy level for electronic transitions that can affect the emission properties. Fluorescence images of osteoblasts using CNDs were acquired and their chelating property towards Pb2+ and Cr6+ detection was tested.
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