期刊
INORGANICS
卷 5, 期 1, 页码 -出版社
MDPI AG
DOI: 10.3390/inorganics5010007
关键词
hydrothermal treatment; tannin; metal oxide nanoparticles; hollow microspheres; iron; carbon hybrid materials
资金
- CPER Structuration du Pole de Competitivite Fibres Grand'Est (Competitiveness Fibre Cluster) through local (Conseil General des Vosges)
- CPER Structuration du Pole de Competitivite Fibres Grand'Est (Competitiveness Fibre Cluster) through regional (Region Lorraine)
- CPER Structuration du Pole de Competitivite Fibres Grand'Est (Competitiveness Fibre Cluster) through national (DRRT)
- CPER Structuration du Pole de Competitivite Fibres Grand'Est (Competitiveness Fibre Cluster) through national (FNADT)
- European (FEDER) funds
- CHEERS project (FEDER funds)
In the present paper, porous materials were prepared from the hydrothermal treatment of aqueous solutions of tannin, a renewable phenolic resource extracted from tree barks, containing dissolved salts of transition metals: V, Cr, Ni and Fe. Hydrothermal treatment produced carbonaceous particles doped with the aforementioned metals, and such materials were treated according to two different routes: (i) calcination in air in order to burn the carbon and to recover porous oxides; (ii) pyrolysis in inert atmosphere so as to recover porous metal/carbon hybrid materials. The nature of the metal salt was found to have a dramatic impact on the structure of the materials recovered by the first route, leading either to nano-powders (V, Cr) or to hollow microspheres (Ni, Fe). The second route was only investigated with iron, leading to magnetic Fe-loaded micro/mesoporous carbons whose texture, pore volumes and surface areas gradually changed with the iron content.
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