1. Effect of Ultrasound on Magnetic Particles Synthesis Involving Oxidation Process

DOI
  • ENOMOTO Naoya
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • SHIGYO Yasushige
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • UEHARA Masato
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University
  • HOJO Junichi
    Department of Applied Chemistry, Faculty of Engineering, Kyushu University

Bibliographic Information

Other Title
  • 1. 溶液酸化を含む磁性沈殿プロセスに対する超音波の影響

Description

Iron (II) hydroxide was oxidized in an ultrasonic-activated solution to produce α-FeOOH (goethite) or Fe_3O_4 (magnetite). This process involves the dissolution of Fe(OH)_2, the oxidation of Fe^<2+> to Fe^<3+>, 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 Fe_3O_4 which has lower oxidation number (Fe=+8/3) than α-FeOOH (Fe=+3).

Journal

Details 詳細情報について

  • CRID
    1390001206052594432
  • NII Article ID
    110009710080
  • DOI
    10.20577/pamjss.9.0_10
  • ISSN
    24241512
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

Report a problem

Back to top