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Role of precipitant species on the coprecipitation for preparing Fe3O4 nanoparticles

JIANCHAO MA1,* , LINGLING WANG1, YANLI WU2, XIAODONG ZHAO3, XIANSHU DONG1, JILONG ZHANG1, QINGFANG ZHANG4, CHEN QIAO4, QINGLIANG MA2,*

Affiliation

  1. College of mining Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China
  2. Key Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi Province, Taiyuan 030024, Shanxi, PR China
  3. Nornico Group firmaco, Shanxi North Machine-building CO., LTD, Taiyuan 030024, Shanxi, PR China
  4. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, PR China

Abstract

Fe3O4 was prepared by adding representative precipitants including NaOH, NH3•H2O, N2H4•H2O, Na2CO3 and NH4HCO3 during the coprecipitation of ferrous and ferric species. The roles of the variable precipitants were explored by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibration sample magnetometer (VSM) and N2 absorption–desorption analyses. The results indicated that higher pH level favored the formation of a larger volume and stronger saturation magnetizations Fe3O4. Thereinto, the strongest saturation magnetization was 89 emu/g. It’s also found that Fe3O4 nanoparticles were well crystallized using N2H4•H2O because of its oxidation resistance and good precipitability. Furthermore, by the synergistic action of both N2H4•H2O and Na2CO3 under mild reaction conditions, the specific surface area of the Fe3O4 nanoparticles estimated by the BET equation was up to137.6 m2/g..

Keywords

Magnetite, Coprecipitation, High specific surface area, Strong saturation magnetization.

Citation

JIANCHAO MA, LINGLING WANG, YANLI WU, XIAODONG ZHAO, XIANSHU DONG, JILONG ZHANG, QINGFANG ZHANG, CHEN QIAO, QINGLIANG MA, Role of precipitant species on the coprecipitation for preparing Fe3O4 nanoparticles, Optoelectronics and Advanced Materials - Rapid Communications, 8, 11-12, November-December 2014, pp.1077-1080 (2014).

Submitted at: Sept. 2, 2014

Accepted at: Nov. 13, 2014