Sonochemical powder processing of iron hydroxides

Naoya Enomoto, Jun Ichi Akagi, Zenbe E. Nakagawa

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Iron (II) hydroxide was oxidized in an ultrasonic-activated solution to produce α-FeOOH (goethite) or Fe3O4 (magnetite). This process involves the dissolution of Fe(OH)2, the oxidation of Fe2+ to Fe3+, and the precipitation of the products. It was found that the ultrasonic treatment greatly fasten the appearance and the growth of the products if oxygen was sufficiently supplied. When the oxygen supply was insufficient, on the other hand, an obvious phenomenon of sonochemical switching due to the enhanced oxidation was observed; that is, ultrasound promoted the α-FeOOH formation and suppressed the formation of Fe3O4 which has lower oxidation number (Fe= +8/3) than α-FeOOH (Fe= +3).

Original languageEnglish
Pages (from-to)S97-S103
JournalUltrasonics Sonochemistry
Volume3
Issue number2
DOIs
Publication statusPublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Chemical Engineering (miscellaneous)
  • Environmental Chemistry
  • Radiology Nuclear Medicine and imaging
  • Acoustics and Ultrasonics
  • Organic Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Sonochemical powder processing of iron hydroxides'. Together they form a unique fingerprint.

  • Cite this