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Issue 47, 2016
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α-Fe2O3 quantum dots: low-cost synthesis and photocatalytic oxygen evolution capabilities

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Abstract

Hematite (α-Fe2O3) quantum dots (QDs) with an average size of 3 nm are synthesized by a facile microwave-assisted reverse micelle method without any substrate and investigated for photocatalytic oxygen evolution for the first time. The QDs show very good crystallinity and a narrow size distribution. Homogeneous microwave heating and a fast nucleation process suppress the secondary growth stage of the particles, giving rise to their quantum size. Photocatalytic measurements reveal that the as-prepared α-Fe2O3 QDs show enhanced activity for visible-light-driven O2 evolution in comparison to commercial α-Fe2O3. Temperature dependent XRD, XPS, and Mott–Schottky plots are carried out to better understand the role of surface states and high surface curvature on the QDs photocatalytic activities.

Graphical abstract: α-Fe2O3 quantum dots: low-cost synthesis and photocatalytic oxygen evolution capabilities

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Publication details

The article was received on 19 Feb 2016, accepted on 18 Apr 2016 and first published on 20 Apr 2016


Article type: Paper
DOI: 10.1039/C6RA04464F
Citation: RSC Adv., 2016,6, 41060-41066
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    α-Fe2O3 quantum dots: low-cost synthesis and photocatalytic oxygen evolution capabilities

    J. Wang, N. Zhang, J. Su and L. Guo, RSC Adv., 2016, 6, 41060
    DOI: 10.1039/C6RA04464F

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