Highly Water-Dispersible Fe3O4 Single Nanocrystals: Gram-Scale Preparation by a Solution-Phase Route and Application for the Absorption of Cd2+ in Water

Authors

  • Xiao-Hui Guan,

    1. School of Chemical Engineering, Northeast Dianli University, Ji Lin, Ji Lin, 132012 (P. R. China)
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  • Bo-Tian Zheng,

    1. School of Chemical Engineering, Northeast Dianli University, Ji Lin, Ji Lin, 132012 (P. R. China)
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  • Min Lu,

    1. School of Chemical Engineering, Northeast Dianli University, Ji Lin, Ji Lin, 132012 (P. R. China)
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  • Xin Guan,

    1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191 (P. R. China), Fax: (+86)-10-82338162
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  • Guang-Sheng Wang,

    Corresponding author
    1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191 (P. R. China), Fax: (+86)-10-82338162
    • Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191 (P. R. China), Fax: (+86)-10-82338162
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  • Lin Guo

    Corresponding author
    1. Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191 (P. R. China), Fax: (+86)-10-82338162
    • Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191 (P. R. China), Fax: (+86)-10-82338162
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Abstract

Fe3O4 nanocrystals with narrow particle size distribution (10–15 nm) were produced in high yield by using a simple solution-phase method at room temperature. In this approach, the iron oxide nanocrystals can be continually prepared through controlling the pH value of the solution. The as-synthesized Fe3O4 nanoparticles are single-crystalline and exhibit high saturation magnetization. New adsorbents of Fe3O4 nanocrystals immobilized on bacterial cellulose (FNBC) were prepared by a simple blending method in the hope of removing heavy metal ions from aqueous solutions. The FNBC showed significantly higher affinity for removing Cd2+ compared to BC. In addition, the effect of characteristic parameters such as pH value, adsorption time by simulating the adsorptive kinetics, and adsorptive isotherms were also investigated.

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