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Open AccessArticle

An Alternative Route to Obtain Carbon Quantum Dots from Photoluminescent Materials in Peat

1
Electrical Engineering Department, Universidade de Brasília, Brasília DF 70919-970, Brazil
2
Instituto de Física, Universidade de Brasília, Darcy Ribeiro Campus, Brasília DF 70919-970, Brazil
3
Instituto Federal de Brasília, Campus Gama, Setor Central do Gama, Brasília DF 72405-025, Brazil
*
Author to whom correspondence should be addressed.
Materials 2018, 11(9), 1492; https://doi.org/10.3390/ma11091492
Received: 14 June 2018 / Revised: 23 July 2018 / Accepted: 27 July 2018 / Published: 21 August 2018
(This article belongs to the Section Carbon Materials)
Peat, an organic compound easily found in the soil (easy to acquire), has more than 50% elemental carbon in its composition and can be used as raw material to produce carbon quantum dots (CQDs, C-dots, Carbon Dots). In this work we describe two simple and low-cost routes for the acquisition of these photoluminescent materials based on peat. The final products were characterized by Fourier transform infrared spectroscopy (FTIR), absorption (UV-Vis) and emission (PL) spectra and high-resolution transmission electron microscopy (HRTEM). The produced CQDs have an average size of 3.5 nm and exhibit coloration between blue and green. In addition, it is possible to produce photoluminescence by means of the aromatic compounds also present in the composition of the peat, in turn exhibiting an intense green coloration. The results indicate great versatility of peat for the production of photoluminescent materials. View Full-Text
Keywords: peat talc; carbon dots; photoluminescence; humic substances; organic electronics peat talc; carbon dots; photoluminescence; humic substances; organic electronics
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MDPI and ACS Style

Souza da Costa, R.; Ferreira da Cunha, W.; Simenremis Pereira, N.; Marti Ceschin, A. An Alternative Route to Obtain Carbon Quantum Dots from Photoluminescent Materials in Peat. Materials 2018, 11, 1492.

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