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Journal of Materials Science

, Volume 49, Issue 9, pp 3478–3483 | Cite as

Amino-functionalized Fe3O4/SiO2 magnetic submicron composites and In3+ ion adsorption properties

  • Fan Zhang
  • Yuanji Shi
  • Zongshan Zhao
  • Baoliang Ma
  • Liangshu Wei
  • Liping Lu
Article

Abstract

Five kinds of amino-functionalized (polyaniline, poly(1,2-diaminobenzene), poly(1,3-diaminobenzene), poly(diphenylamine), and poly(o-toluidine)) Fe3O4/SiO2 submicron composites (SCs) were prepared. The SEM and TEM results showed that these SCs possessed a sphere-like core/shell structure with an average diameter of ~500 nm. The XRD results indicated good crystallinity of Fe3O4 core, the amorphous SiO2, and amino-functionalized shells. The XPS results confirmed that amino groups were plentiful rich outside the surface of these SCs which acted as the effective groups for adsorbing the metal ions. These SCs showed a good thermal stability at 20–250 °C. The high saturation magnetization of 60–70 emu/g is better than other similar reports. In3+ adsorption coefficients from aqueous solution by these SCs were higher than 106 mL/g, indicating the higher selectivity and affinity to In3+ compared with Cd2+ and Hg2+ ions. In addition, these SCs could be magnetically reclaimed within 30 s and regenerated with acid after adsorption. The adsorption capabilities only decreased by 6 % after five cycles. The present work indicates that the amino-functionalized Fe3O4/SiO2 SCs are promising for removal of In3+ ions in field application.

Keywords

Fe3O4 Polyaniline Diphenylamine Adsorption Coefficient High Saturation Magnetization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was financially supported by the Youth Science and technology innovation fund from Nanjing Agricultural University and the Youth Fund of Jiangsu Province.

Supplementary material

10853_2014_8060_MOESM1_ESM.doc (460 kb)
Supplementary material 1 (DOC 462 kb)

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Fan Zhang
    • 1
  • Yuanji Shi
    • 2
  • Zongshan Zhao
    • 3
  • Baoliang Ma
    • 1
  • Liangshu Wei
    • 1
  • Liping Lu
    • 1
  1. 1.College of ScienceNanjing Agricultural UniversityNanjingPeople’s Republic of China
  2. 2.Nanjing Panda Electronics Co., LtdNanjingPeople’s Republic of China
  3. 3.Key Laboratory of Marine Chemistry Theory and Technology, Ministry of EducationOcean University of ChinaQingdaoChina

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