| Full text | |
| Author(s): |
Damasceno, Joao Paulo V.
;
Kubota, Lauro T.
Total Authors: 2
|
| Document type: | Journal article |
| Source: | CARBON TRENDS; v. 9, p. 9-pg., 2022-10-01. |
| Abstract | |
Fullerenols are fullerenes derivatives enriched on hydroxyl groups that are obtained usually as nanoaggregates dispersed in water. These materials are used in energy-related and biological applications, and they have been reported as radical scavengers, antioxidants and stable radicals. However, most syntheses demand highly toxic solvents to dissolve precursor fullerene, potentially dangerous reagents such as hydrogen peroxide, and prolonged reactions. Herein, a novel and faster procedure for fullerenol preparation based on the reaction between fullerene C-60 and potassium hydroxide in a polar solvent is reported. Initially, fullerenol radicals are formed, followed by air oxidation that promotes charge loss and simultaneous clustering into nanoaggregates with diameters up to 90 nm. Dried fullerenol has about 12 oxygenated groups per C-60. Then, an aqueous dispersion was prepared with dispersed material having lyophobic behavior but maintaining the modification degree. This low-modified fullerenol remains dispersed indefinitely in organic medium due to electrostatic and solvation colloidal interactions arising from the functional groups. As a result, stable organic dispersions with concentrations up to 10 mg mL(-1) were obtained. This work opens new possibilities on fullerenol preparation and new perspectives concerning the achievement of stable colloids of carbon nanomaterials due to the unprecedented stability and mass concentration of the reported fullerenol dispersions. (C) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) (AU) | |
| FAPESP's process: | 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis |
| Grantee: | Marco Aurelio Zezzi Arruda |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 20/06604-9 - Conductive inks based on carbon nanomaterials for the preparation of electrodes applied to electrochemical devices |
| Grantee: | João Paulo Vita Damasceno |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 13/22127-2 - Development of novel materials strategic for integrated analytical devices |
| Grantee: | Lauro Tatsuo Kubota |
| Support Opportunities: | Research Projects - Thematic Grants |