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Facile Size-Controllable Synthesis of Colorful Quasi-Cubic α-Fe2O3 Materials from Nanoscale to Microscale and Their Properties Related to the Size Effect

Authors

  • Shuai He,

    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)
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  • Dr. 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)
    • 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)
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  • Jia-Wei Wang,

    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)
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  • Yun-Zhao Wei,

    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)
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  • Yun Wu,

    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)
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  • Prof. 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)
    • 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)
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  • Prof. Mao-Sheng Cao

    Corresponding author
    1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 (P. R. China)
    • School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 (P. R. China)
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Abstract

A facile and environmentally friendly hydrothermal approach has been employed to synthesize size-controllable quasi-cubic α-Fe2O3 nanocrystals by using an aqueous solution of FeCl3 without any alkaline materials and stabilizing agent. The as-prepared products were carefully characterized and the growth mechanism is also discussed. This hydrothermal synthesis of such quasi-cubic structures implies a simple and low-cost route to prepare monodisperse nanomaterials on a large scale. The size-controllable synthesis of α-Fe2O3 is the first achieved successfully from 80 nm to 2 μm with constant structures. The synthesized α-Fe2O3 materials have different optical properties and stabilities in water, which are caused by the change of their band-gap energy and specific surface areas. Finally, the dielectric properties of synthesized α-Fe2O3 cubes were also investigated, and the differences caused by the particle sizes are discussed.

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