One-step synthesis of sea urchin-like alpha-MnO2 using KIO4 as the oxidant and its oxidation of arsenite

M.X. Wang, W.F. Tan, X.H. Feng, L.K. Koopal, M.M. Liu, F. Liu

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

Among several types of manganese oxides alpha-MnO2 is the most active due to its good catalytic, adsorption and ion exchange properties. Sea urchin-like alpha-MnO2 particles were synthesized by a one-step chemistry route at room temperature using MnSO4 in combination with KIO4 as oxidant. The obtained alpha-MnO2 was characterized using X-ray powder diffraction (XRD), structure refinement, electron microscopy and N-2 gas adsorption and used to investigate the property of the As (III) oxidation. Results revealed that the space group of the prepared product is I-4/m with lattice constants a = 9.840 angstrom and c = 2.856 angstrom, and the average grain diameter is around 6.7 nm. The BET surface area is 201 m(2).g(-1). Its maximum oxidation capacity of arsenite is up to 1086 mmol.kg(-1).
Original languageEnglish
Pages (from-to)60-62
JournalMaterials Letters
Volume77
DOIs
Publication statusPublished - 2012

Keywords

  • formaldehyde oxidation
  • cryptomelane-type
  • facile synthesis
  • manganese
  • oxides
  • size

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