Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-28T08:44:23.106Z Has data issue: false hasContentIssue false
  • English
  • Français

Porosity through reduction in metal oxides

Published online by Cambridge University Press:  01 February 2011

Daniel P Shoemaker ,
Serena Ann Corr  and
Ram Seshadri
Daniel P Shoemaker
Affiliation:
[email protected], University of California Santa Barbara, Materials, Santa Barbara, California, United States
Serena Ann Corr
Affiliation:
[email protected], University of California Santa Barbara, Materials Research Laboratory, Santa Barbara, California, United States
Ram Seshadri
Affiliation:
[email protected], United States
Get access

Abstract

Routes to porous materials with nanoscale dimensions have been investigated. In the first example presented, porous manganese oxide has been prepared by leaching Ni metal from a nickel-manganese oxide precursor via reduction. Electron microscopy studies have revealed the presence of Ni nanoparticles on the surface, and also embedded within the porous MnO matrix. Magnetic measurements have shown exchange bias between the ferromagnetic Ni nanoparticles and the antiferromagnetic MnO phase. In the second system studied, porous nanostructures of rutile VO2 and corundum V2O3 have been prepared by reduction of amine-templated V2O5−δ nanoscrolls. The porosity of these materials has been probed by electron microscopy, N2 sorption measurements and thermogravimetric analysis.

Keywords

porositymetaloxide
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1148: Symposium PP – Solid-State Chemistry of Inorganic Materials VII , 2008 , 1148-PP10-01
Copyright
Copyright © Materials Research Society 2009

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

1. Shchukin, D G, Schattka, J H, Antonietti, M, Caruso, R A, Photocatalytic properties ofporous metal oxide networks by nanoparticle infiltration in a polymer gel template, J. Phys. Chem. B 107 952–957 (2003)Google Scholar
2. Tiemann, M, Porous metal oxides as gas sensors, Chem. Eur. J. 13 8376–8388 (2007)Google Scholar
3. Owens, B B, Passerini, S, Smyrl, W H, Lithium ion insertion in porous metal oxides, Electrochimica Acta 45 215–224 (1999)Google Scholar
4. Toberer, E S, Seshadri, R, Spontaneous formation of macroporous monoliths of mesoporous manganese oxide crystals, Adv. Mater. 17 2244–2246 (2005)Google Scholar
5. Toberer, E S, Löfvander, J P, Seshadri, R, Topochemical formation of mesoporous MnO crystals, Chem. Mater. 18 1047–1052 (2006)Google Scholar
6. Toberer, E S, Epping, J D, Chmelka, B F, Seshadri, R, Hierarchically porous rutile titania: harnessing spontaneous compositional change in mixed-metal oxides, Chem. Mater. 18 6345–6351 (2006)Google Scholar
7. Toberer, E S, Schladt, T D, Seshadri, R, Macroporous manganese oxides with regenerative mesopores, J. Am. Chem. Soc. 128 1462–1463 (2006)Google Scholar
8. Nogués, J, Sort, J, Langlais, V, Skumryev, V, Suriñach, S, Muñoz, J S and Baró, M D, Exchange bias in nanostructures, Phys. Rep. 422 65–117 (2005)Google Scholar
9. Wickham, D G, Solid-phase equilibria in the system NiO–Mn2O3–O, J. Inorg. Nucl. Chem. 26 1369–77 (1964)Google Scholar
10. Corr, S A, Grossman, M, Furman, J D, Melot, B C, Cheetham, A K, Keier, K R, Seshadri, R, Controlled reduction of vanadium oxide nanoscrolls: crystal structure, morphology and electrical properties, Chem. Mater. 20 6396–6404 (2008)Google Scholar
11. Shoemaker, D P, Grossman, M and Seshadri, R, Exchange biasing of single-domain Ni nanoparticles spontaneously grown in an antiferromagnetic MnO matrix, J. Phys. Cond. Mat. 20 195219 (2008)Google Scholar