Novel environmentally friendly synthesis of superparamagnetic magnetite nanoparticles using mechanochemical effect

Tomohiro Iwasaki, Kazunori Kosaka, Satoru Watano, Takeshi Yanagida, Tomoji Kawai

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A novel method for synthesizing superparamagnetic magnetite nanoparticles in water system via coprecipitation under an environmentally friendly condition has been developed. In this method, an almost neutral suspension containing ferrous hydroxide and goethite is used as the starting suspension and subjected to a ball-milling treatment. The product was characterized by transmission electron microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, dynamic light scattering, superconducting quantum interference device magnetometry, and Mössbauer spectroscopy. The mechanochemical effect generated by the ball-milling treatment promoted the reaction between ferrous hydroxide and goethite even at room temperature, resulting in the formation of homogeneous magnetite nanoparticles. Simultaneously, it also contributed to crystallize the formed magnetite nanoparticles while inhibiting the particle growth. This resulted in the formation of ultrafine magnetite nanoparticles of about 10 nm having a single crystal structure. This method could provide ferromagnetic magnetite nanoparticles with superparamagnetism under the moderate condition without neither heating nor any additives such as surfactant and organic solvent.

Original languageEnglish
Pages (from-to)481-485
Number of pages5
JournalMaterials Research Bulletin
Volume45
Issue number4
DOIs
Publication statusPublished - Apr 1 2010
Externally publishedYes

Fingerprint

Magnetite Nanoparticles
Magnetite nanoparticles
magnetite
nanoparticles
synthesis
Ball milling
hydroxides
balls
Suspensions
Superparamagnetism
SQUIDs
Dynamic light scattering
Coprecipitation
Surface-Active Agents
Organic solvents
spectroscopy
magnetic measurement
Surface active agents
x rays
light scattering

All Science Journal Classification (ASJC) codes

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

Cite this

Novel environmentally friendly synthesis of superparamagnetic magnetite nanoparticles using mechanochemical effect. / Iwasaki, Tomohiro; Kosaka, Kazunori; Watano, Satoru; Yanagida, Takeshi; Kawai, Tomoji.

In: Materials Research Bulletin, Vol. 45, No. 4, 01.04.2010, p. 481-485.

Research output: Contribution to journalArticle

Iwasaki, Tomohiro ; Kosaka, Kazunori ; Watano, Satoru ; Yanagida, Takeshi ; Kawai, Tomoji. / Novel environmentally friendly synthesis of superparamagnetic magnetite nanoparticles using mechanochemical effect. In: Materials Research Bulletin. 2010 ; Vol. 45, No. 4. pp. 481-485.
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