α-Fe2O3 quantum dots: Low-cost synthesis and photocatalytic oxygen evolution capabilities

Jian Wang; Ning Zhang; Jinzhan Su; Liejin Guo

doi:10.1039/c6ra04464f

α-Fe₂O₃ quantum dots: Low-cost synthesis and photocatalytic oxygen evolution capabilities

Jian Wang
, Ning Zhang
, Jinzhan Su
, Liejin Guo

School of Energy and Power Engineering

Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

38 Scopus citations

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.

Original language	English
Pages (from-to)	41060-41066
Number of pages	7
Journal	RSC Advances
Volume	6
Issue number	47
DOIs	https://doi.org/10.1039/c6ra04464f
State	Published - 2016

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title = "α-Fe2O3 quantum dots: Low-cost synthesis and photocatalytic oxygen evolution capabilities",

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.",

author = "Jian Wang and Ning Zhang and Jinzhan Su and Liejin Guo",

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T1 - α-Fe2O3 quantum dots

T2 - Low-cost synthesis and photocatalytic oxygen evolution capabilities

AU - Wang, Jian

AU - Zhang, Ning

AU - Su, Jinzhan

AU - Guo, Liejin

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

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DO - 10.1039/c6ra04464f

M3 - 文章

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JO - RSC Advances

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ER -

α-Fe₂O₃ quantum dots: Low-cost synthesis and photocatalytic oxygen evolution capabilities

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