Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-23T06:17:08.557Z Has data issue: false hasContentIssue false
  • English
  • Français

The peculiarities of reduction of iron (III) oxides deposited on expanded graphite

Published online by Cambridge University Press:  23 January 2014

Marat Lutfullin ,
Olga Shornikova ,
Alexander Dunaev ,
Dmitry Filimonov ,
Alina Schur ,
Makhsud Saidaminov ,
Natalya Sorokina  and
Viktor Avdeev
Marat Lutfullin*
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia
Olga Shornikova
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia; and Institute of New Carbon Materials and Technologies (JSC), Moscow 119991, Russia
Alexander Dunaev
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia; and Institute of New Carbon Materials and Technologies (JSC), Moscow 119991, Russia
Dmitry Filimonov
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia
Alina Schur
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia
Makhsud Saidaminov
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia
Natalya Sorokina
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia; and Institute of New Carbon Materials and Technologies (JSC), Moscow 119991, Russia
Viktor Avdeev
Affiliation:
Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia; and Institute of New Carbon Materials and Technologies (JSC), Moscow 119991, Russia
*
a)Address all correspondence to this author. e-mail: [email protected]
Get access

Abstract

A reduction of iron (III) oxides deposited on expanded graphite (EG) matrixes of three types in hydrogen flow was studied in dynamic and static regimes. In the dynamic regime, the EG matrix was shown not to influence the temperature range of the iron (III) oxide reduction. However, the C/O atomic ratios, varying depending on the type of EG matrixes, affect the completeness of reduction of these oxides to metallic iron. The reduction kinetics of iron (III) oxides deposited on EG and of bulk oxides were found to be similar and could be described by the combination of expanded Prout–Tompkins autocatalysis and n-dimensional growth of nuclei models. The prolonged hydrogen treatment at 600 °C of the samples in the static regime results in quantitative reduction of iron (III) oxide to α-Fe independent of the type of EG matrix used. The obtained samples demonstrate the relatively high values of saturation magnetization of 35 emu/g together with a high sorption capacity for crude oil of 93 g/g.

Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 2 , 28 January 2014 , pp. 252 - 259
Copyright
Copyright © Materials Research Society 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Chen, X., Lam, K.F., Zhang, Q., Pan, B., Arruebo, M., and Yeung, K.: Synthesis of highly selective magnetic mesoporous adsorbent. J. Phys. Chem. C 113, 9804 (2009).Google Scholar
Bystrzejewski, M., Pyrzynska, K., Huczko, A., and Lange, H.: Carbon-encapsulated magnetic nanoparticles as separable and mobile sorbents of heavy metal ions from aqueous solutions. Carbon 47, 1189 (2009).Google Scholar
Wang, G., Sun, Q., Zhang, Y., Fan, J., and Ma, L.: Sorption and regeneration of magnetic exfoliated graphite as a new sorbent for oil pollution. Desalination 263, 183 (2010).Google Scholar
Toyoda, M. and Inagaki, M.: Heavy oil sorption using exfoliated graphite. New application of exfoliated graphite to protect heavy oil pollution. Carbon 38, 199 (2000).Google Scholar
Lutfullin, M.A., Shornikova, O.N., Vasiliev, A.V., Pokholok, K.V., Osadchaya, V.A., Saidaminov, M.I., Sorokina, N.E., and Avdeev, V.V.: Petroleum products and water sorption by expanded graphite enhanced with magnetic iron phases. Carbon 66, 417 (2014).Google Scholar
Huber, D.: Synthesis, properties, and applications of iron nanoparticles. Small 1, 482 (2005).Google Scholar
Beguin, F. and Frackowiak, E.: Electrochemical synthesis of iron supported on exfoliated graphite. J. Phys. Chem. Solids 57, 841 (1996).Google Scholar
Urbaniak, J., Skowroński, J.M., and Olejnik, B.: Preparation of Fe2O3-exfoliated graphite composite and its electrochemical properties investigated in alkaline solution. J. Solid State Electrochem. 14, 1629 (2010).Google Scholar
Lutfullin, M.A., Shornikova, O.N., Pokholok, K.V., Sorokina, N.E., and Avdeev, V.V.: Preparation and properties of exfoliated graphite modified with iron compounds. Inorg. Mater. 48, 1175 (2012).Google Scholar
Huan, Z., Zhao-hui, J., Lu, H., and Cheng-hu, Q.: Synthesis of nanoscale zero-valent iron supported on exfoliated graphite for removal of nitrate. Trans. Nonferrous Met. Soc. China 16, 345 (2006).Google Scholar
Shornikova, O.N., Sorokina, N.E., and Avdeev, V.V.: The effect of graphite nature on the properties of exfoliated graphite doped with nickel oxide. J. Phys. Chem. Solids 69, 1168 (2008).Google Scholar
Avdeev, V.V., Sorokina, N.E., and Tverezovskaya, O.A.. The Synthesis of GICs with HNO3. The news of Moscow University, Vol. 40, 1999, p. 422.Google Scholar
Volfkovich, Y., Bagotzky, V., Sosenkin, V., and Blinov, I.: The standard contact porosimetry. Colloids Surf., A 187–188, 349 (2001).Google Scholar
Long, G.J., ed.: Mossbauer Spectroscopy Applied to Inorganic Chemistry, Vol. 2 (Springer-Verlag, New York, 1987), p. 506.Google Scholar
Zboril, R.: Iron(III) oxides from thermal processes—Synthesis, structural and magnetic properties, Mossbauer spectroscopy characterization and applications. Chem. Mater. 14, 969 (2002).Google Scholar
Kundu, T.K., Mukherjee, M., and Chakravorty, D.: Growth of nano-a-Fe2O3 in a titania matrix by the sol-gel route. J. Mater. Sci. 33, 1759 (1998).Google Scholar
Pei, S. and Cheng, H-M.: The reduction of graphene oxide. Carbon 50, 3210 (2012).Google Scholar
Jeong, H-K., Lee, Y.P., Jin, M.H., Kim, E.S., Bae, J.J., and Lee, Y.H.: Thermal stability of graphite oxide. Chem. Phys. Lett. 470, 255 (2009).Google Scholar
Baldokhina, Y.V., Suzdaleva, I.P., Prusakova, V.E., Burnazyana, D.A., Korneevb, V.P., Kovalenkob, L.V., and Folmanisb, G.E.: A study of nanostructures formed in the hydrogen reduction of Fe(OH)3. Russ. J. Phys. Chem. B 6, 81 (2012).Google Scholar
Phillips, J.: Application of Mossbauer spectroscopy for the characterization of iron-containing catalysts. Hyperfine Interact. 111, 3 (1998).Google Scholar
Lin, H-Y., Chen, Y-W., and Li, C.: The mechanism of reduction of iron oxide by hydrogen. Thermochim. Acta 400, 61 (2003).Google Scholar
Pineau, A., Kanari, N., and Gaballah, I.: Kinetics of reduction of iron oxides by H2. Part I: Low temperature reduction of hematite. Thermochim. Acta 447, 89 (2006).Google Scholar