| Title |
Synthesis of a magnetic composite of silica with micro and nano-cobalt metallic structures from a spent catalyst (Co3O4) |
| ID_Doc |
7887 |
| Authors |
Pavoski, G; Garjulli, F; dos Santos, CR; Moraes, ML; Tenorio, JAS; Espinosa, DCR |
| Title |
Synthesis of a magnetic composite of silica with micro and nano-cobalt metallic structures from a spent catalyst (Co3O4) |
| Year |
2022 |
| Published |
|
| DOI |
10.1016/j.mseb.2022.115921 |
| Abstract |
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. |
| Author Keywords |
Mixed cobalt oxide catalyst; Recycling; Magnetic properties |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000859494200004 |
| WoS Category |
Materials Science, Multidisciplinary; Physics, Condensed Matter |
| Research Area |
Materials Science; Physics |
| PDF |
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