Journal
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume 140, Issue -, Pages 239-244Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jaap.2019.03.022
Keywords
Carbothermal synthesis; Iron-based nanomaterials; Lignin; Magnetization; Pyrolysis
Funding
- European Union [645551]
- CONICET Polytechnic of Torino [54_RSG17NIR01]
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Nano zero-valent iron (nZVI) has been used as an effective catalyst in different reduction reactions. In this work, a synthesis procedure to obtain a carbon based materials with high nZVI content is reported. This synthesis method consists in a carbothermal reduction at 800 degrees C of Fe3O4 nanoparticles coated with lignin-derived bio-based substances (BBS) as carbon source, which have been previously prepared from the co-precipitation method. The obtained materials were characterized by powder X-ray diffraction (XRD), Mossbauer spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and magnetization measurements. The concentration of carbon used in the synthesis process was a critical parameter for obtaining high nZVI yield. Nanomaterials with a 77% of alpha-Fe over the total iron and saturation magnetization (Ms) of 170 emu g(-1) were obtained for the best condition.
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