Heat Treatment of Iron-Adsorbed Functionalized Nanocellulose Fibers in Order to Synthesize Hybrid Inorganic-Carbon Material
2024
Ghosh, Anupama | Rodrigues Del Grande, Mariana | Tonette Teixeira, Lucas | Letichevsky, Sonia | Senna, Carlos Alberto | Carbajal Ccoyllo, Mario Dayvid | Chaves e Silva, João Felipe | Gois de Oliveira, Victor Carôzo | Correia de Siqueira, Rogerio Navarro
In the light of waste management and sustainable synthesis, chemically modified and oxidized cellulose nanofibers (TCN), after iron ion adsorption from aqueous solution, was thermally treated at 500oC, 600oC and 750oC under inert atmosphere to generate hybrid inorganic-carbonaceous nanohybrids, named TCN@Fe 500oC, TCN@Fe 600oC and TCN@Fe 750oC, respectively. These nanocomposites were characterized by X-ray and electron diffraction (XRD and ED), Raman spectroscopy, scanning and transmission electron microscopy (SEM and TEM) and Energy Dispersive Spectroscopy (EDS). All of these samples showed hybrid structure with mixed iron oxide (hematite and magnetite) particles dispersed in the amorphous carbon matrix. However, with increasing temperature, both the inorganic and carbon phase shows substantial changes, especially in hematite/magnetite ratio in the inorganic phase and crystallinity as well as chemical composition (oxygen/carbon ratio) of the carbonaceous phase. Also, with temperature, the dispersion of the iron oxide nanoparticle in the carbonaceous matrix becomes uniform whereas HRTEM analysis of the sample TCN@Fe 750oC shows the average diameter of the iron oxide nanoparticle to be of 6.26 nm, making this material a true inorganic-carbonaceous nanohybrid with possibility of various applications, mainly as an electrode material for supercapacitor application.
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出版者 University of Belgrade, Technical faculty in Bor (Serbia)