| Full text | |
| Author(s): Show less - |
Juliana B. Parra
[1]
;
Karina C. Silva
[2]
;
Pedro A. S. Valezin
[3]
;
Raphael G. Martins
[4]
;
Rodolfo R. Gomes
[5]
;
Rafael S. Pereira
[6]
;
Fernando M. de Melo
[7]
;
Andreia de A. Morandim-Giannetti
[8]
;
Ronaldo G. dos Santos
[9]
;
Luz Consuelo G. A. Panzarini
[10]
;
Marcos M. Toyama
[11]
Total Authors: 11
|
| Affiliation: Show less - | [1] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[2] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[3] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[4] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[5] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[6] Universidade Federal do ABC. Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas - Brasil
[7] Universidade de São Paulo. Instituto de Química - Brasil
[8] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[9] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[10] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
[11] Centro Universitário FEI. Departamento de Engenharia Química - Brasil
Total Affiliations: 11
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 31, n. 11, p. 2224-2231, 2020-10-30. |
| 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 carbon-based 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 (mFTIR), 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. (AU) | |
| FAPESP's process: | 17/09469-2 - Development of chiral plasmonic systems to use as sensors, light propagation and molecular information |
| Grantee: | Vitor de Moraes Zamarion |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/24725-4 - Supramolecular chemistry and nanotechnology |
| Grantee: | Henrique Eisi Toma |
| Support Opportunities: | Research Projects - Thematic Grants |