| Texto completo | |
| Autor(es): |
Pavoski, Giovani
;
Garjulli, Franco
;
dos Santos, Caio Renato
;
Moraes, Marcelo Lacerda
;
Soares Tenorio, Jorge Alberto
;
Romano Espinosa, Denise Crocce
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 285, p. 15-pg., 2022-08-11. |
| Resumo | |
Cobalt is a magnetism metal used in different areas, like catalysts. When these cobalt catalysts are discarded, they must be appropriately disposed of in a suitable place. This work aims to recycle and apply circular economy with the synthesis of a magnetic composite through a spent catalyst (silica/cobalt). The catalyst is composed of 93 % Co(3)O(4 )and 7 % CoO. The best parameters to perform the thermal reduction of catalysts were using a CO-CO2 atmosphere were 1 h isothermal period at 350 C. The single CoO structure was confirmed and encapsulated in silica by the hydrolytic sol-gel method. These composites were subjected to a thermal reduction. The magnetic properties increased from a range of 0.0008-0.001 emu g(-1) to 15.86-30.96 emu g(-1). Thus, this work presented a viable process for recycling a spent catalyst and synthesis of a composite likely to be applied to materials to improve or add magnetism. (AU) | |
| Processo FAPESP: | 21/15156-2 - Aplicação de nanopartículas magnéticas funcionalizadas para a separação seletiva de lantânio de solução proveniente da lixiviação de catalisadores gastos |
| Beneficiário: | Giovani Pavoski |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 19/11866-5 - Desenvolvimento de processos inovadores para recuperação de metais críticos |
| Beneficiário: | Denise Crocce Romano Espinosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |