α-Fe2O3 Cubes with High Visible-Light-Activated Photoelectrochemical Activity towards Glucose: Hydrothermal Synthesis Assisted by a Hydrophobic Ionic Liquid

Authors

  • Dr. Li Xu,

    1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China)
    2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
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  • Dr. Jiexiang Xia,

    1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
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  • Prof. Leigang Wang,

    1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China)
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  • Dr. Jing Qian,

    1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
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  • Prof. Huaming Li,

    Corresponding author
    1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
    • School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108

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  • Prof. Kun Wang,

    1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
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  • Dr. Kaiyong Sun,

    1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
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  • Prof. Minqiang He

    1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013 (P. R. China), Fax: (+86) 511-88791108
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Abstract

A liquid/liquid interfacial reaction system was designed to fabricate α-Fe2O3 cubes. The reaction system uses a hydrophobic ionic liquid containing iron ions ([(C8H17)2(CH3)2N]FeCl4) for manufacturing α-Fe2O3 cubes by a novel and environmentally friendly hydrothermal method under low-temperature conditions (140 °C). The iron-containing ionic liquid is hydrophobic and can form a liquid/liquid interface with water, which is vital for fabrication of the α-Fe2O3 cubes. Nanomaterials synthesized from hydrophobic iron-containing ionic liquids show good crystallinity, well-developed morphology, and uniform size. The effect of different ionic liquids on the morphology of α-Fe2O3 was investigated in detail. [(C8H17)2(CH3)2N]FeCl4 is assumed to perform the triple role of forming a liquid/liquid interface with water and acting as reactant and template at the same time. The effect of the reaction temperature on the formation of the α-Fe2O3 cubes was also studied. Temperatures lower or higher than 140 °C are not conducive to formation of the α-Fe2O3 cubes. Their photoelectrochemical properties were tested by means of the transient photocurrent response of electrodes modified with as-prepared α-Fe2O3 cubes. The photocurrent response of an α-Fe2O3 cubes/indium tin oxide electrode is high and stable, and it shows great promise as a photoelectrochemical glucose sensor with high sensitivity and fast response, which are beneficial to practical applications of nanosensors.

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