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Open AccessArticle

Synthetic Bio-Graphene Based Nanomaterials through Different Iron Catalysts

by Qiangu Yan 1,†, Jinghao Li 2,†, Xuefeng Zhang 1, Jilei Zhang 1,* and Zhiyong Cai 2,*
1
Department of Sustainable Bioproducts, Mississippi State University, Starkville, MS 39762, USA
2
Forest Products Laboratory, USDA Forest Service, Madison, WI 53726, USA
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2018, 8(10), 840; https://doi.org/10.3390/nano8100840
Received: 25 September 2018 / Revised: 9 October 2018 / Accepted: 11 October 2018 / Published: 16 October 2018
Kraft lignin was catalytically graphitized to graphene-based nanostructures at 1000 °C under argon atmosphere with four iron catalysts, iron(III) nitrate (Fe-N); iron(II) chloride (Fe-Cl2); iron(III) chloride (Fe-Cl3); and iron(II) sulfate (Fe-S). The catalytic decomposition process of iron-promoted lignin materials was examined using thermalgravimetric analysis and temperature-programmed decomposition methods. The crystal structure, morphology and surface area of produced materials were characterized by means of X-ray diffraction, Raman, scanning electron microscopy, high resolution transmission electron microscopy and N2 adsorption−desorption techniques. Experimental results indicated that iron nitrate catalyst had better iron dispersion three other iron salts. Iron nitrate was the most active catalyst among four iron salts. The low activity of iron in iron chloride-promoted samples was because the residual chlorine over iron surfaces prevent iron interaction with lignin functional groups. View Full-Text
Keywords: kraft lignin; catalytic thermal decomposition; carbon-based nanomaterials; iron(III) nitrate; iron(II) sulfate; iron(II) chloride; iron(III) chloride kraft lignin; catalytic thermal decomposition; carbon-based nanomaterials; iron(III) nitrate; iron(II) sulfate; iron(II) chloride; iron(III) chloride
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Yan, Q.; Li, J.; Zhang, X.; Zhang, J.; Cai, Z. Synthetic Bio-Graphene Based Nanomaterials through Different Iron Catalysts. Nanomaterials 2018, 8, 840.

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