Synthesis and anion exchange of tunnel structure akaganeite

J. Cai, J. Liu, Z. Gao, A. Navrotsky, S. L. Suib

Research output: Contribution to journalArticlepeer-review

116 Scopus citations

Abstract

Akaganeite (β-FeOOH) has been prepared by the hydrolysis of FeCl3 solutions. The effects of microwave heating, pH of the solution, and addition of manganese with different valence states have been studied for the optimization of its synthesis. The nucleation and growth of akaganeite crystallites are accelerated by microwave heating. A low pH favors the crystallization of akaganeite, and a high pH favors the crystallization of hematite. Addition of manganese appears to impede crystallization at low pH but improves it at high pH. The anion exchange of Cl-akaganeite with F-, Br-, and OH- and some properties of different anion-exchanged akaganeites has been investigated. The exchange rate and capacity depend on the nature of the anions. Anion exchange significantly changes the loss of chloride and affects the decomposition of akaganeite upon being heated.

Original languageEnglish (US)
Pages (from-to)4595-4602
Number of pages8
JournalChemistry of Materials
Volume13
Issue number12
DOIs
StatePublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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