Direct hydrothermal synthesis of nanosized mesoporous ramsdellite manganese oxide with high surface area

Baowang Lu, Shimou Chen, Katsuya Kawamoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We first synthesized nanosized mesoporous R-MnO 2 using different block copolymers and PEG by direct hydrothermal synthesis method. The block copolymers seemed to play the important role. At appropriate synthesis conditions, the mesoporous R-MnO 2 with high surface area, narrow pore size distributions and ordered structure with uniform mesopores could be obtained. The mesoporous R-MnO 2 had nanoarrays with uniform mesopores (intercrystalline voids). Because the residual copolymer in the product could be easily removed by washing after synthesis, the calcination procedure of the final mesoporous R-MnO 2 obtained was not necessary, suggesting that this method is economical and environmental. This direct hydrothermal synthesis method can potentially develop a new method for preparing other metal oxide. We think that the mesoporous R-MnO 2 formed through a mechanism that combines PEO moieties in block polymers self-assembly with complication of Mn species. The mesoporous R-MnO 2 had high thermal stability.

Original languageEnglish
Pages (from-to)3619-3624
Number of pages6
JournalMaterials Research Bulletin
Volume47
Issue number11
DOIs
Publication statusPublished - Nov 1 2012
Externally publishedYes

Keywords

  • A. Inorganic compounds
  • A. Oxides
  • B. Chemical synthesis
  • C. X-ray diffraction
  • D. Surface properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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