Please use this identifier to cite or link to this item: https://repositorio.fei.edu.br/handle/FEI/3525
Title: Preparation of Fluorescent Carbon-Based Dots from Waste Tire Pyrolysis
Authors: PARRA, JULIANA B.
SILVA, KARINA C.
VALEZIN, PEDRO A. S.
MARTINS, RAPHAEL G.
GOMES, RODOLFO R.
PEREIRA, RAFAEL S.
MELO, FERNANDO M. DE
Andreia De Araújo Morandim Giannetti
SANTOS, RONALDO G. DOS
PANZARINI, LUZ CONSUELO G. A.
TOYAMA, MARCOS M.
Issue Date: 30-Oct-2020
Abstract: The pyrolysis of waste tire has been proposed as an alternative route to its recycling producing residual oils that can be used as fuels. In this work, a physicochemical process to obtain carbonbased dots (CBD) from carbon black (CBL) derivatives of tires is described. For this, the CBL was treated with different acids to produce CBL1 and CBL2 particles suspension. The pH of the suspension was adjusted to 5.6 to precipitate remaining impurities. Afterwards, the supernatant was ultra-centrifuged and the yellow pale solid, the purified CBD obtained by roto evaporation, was characterized by ultraviolet-visible spectrophotometer (UV-Vis), photoluminescence (PL) at 320-380 nm, high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared microscopy (µFTIR), and X-ray photoelectron spectroscopy (XPS). This material showed the typical excitation wavelength dependent emission and a PL quantum yield of 19.29% and was constituted by a well-defined spherical shaped and single sheets of “graphene quantum dots” with undefined shape, with potential applications in optoelectronic and fluorescence imaging devices.
Keywords: Waste tire
Pyrolysis
Carbon-based dots
Quantum-dots
Journal: JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
metadata.fei.scopus.citations: 6
Citation: SILVA, K. C.; VALEZIN, P. A. S.; MARTINS, R. G.; GOMES, R. R.; PEREIRA, R. S. MELO, F. M. DE; ANDREIA DE A. M. G.; SANTOS, R G. DOS PANZARINI, L.C. G. A.; TOYAMA, M. M. Preparation of fluorescent carbon-based dots from waste tire pyrolysis. JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY, v. 31, n. 11, p. 2224-2231, 2020.
Access Type: Acesso Aberto
DOI: 10.21577/0103-5053.20200072
Appears in Collections:Artigos

Files in This Item:
File Description SizeFormat 
Morandin_pdf3.77 MBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.