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Issue 11, 2010
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Synthesis and photoelectrochemical cell properties of vertically grown α-Fe2O3 nanorod arrays on a gold nanorod substrate

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Abstract

Photoelectrochemical cells prepared from highly ordered and vertically grown α-Fe2O3 nanorod arrays on a Au nanorod substrate showed about 8 mA cm−2 photocurrent density under 1 sun condition without any hole scavenger. To the best of our knowledge, it is the highest value obtained from α-Fe2O3. The Au nanorod arrays were firstly grown inside the AAO nanotubes to provide a conductive surface, not only for the electrochemical deposition of the target material, but also to act as the current collector of a photoelectrochemical cell. Then, the Fe nanorods were electrodeposited on the gold nanorods and annealed in an O2 atmosphere to convert them into α-Fe2O3 nanorod arrays. The α-Fe2O3 nanorod arrays stood freely on the gold nanorod arrays after the removal of the AAO template. The photoelectrochemical properties of the α-Fe2O3 nanorod arrays as a photoanode were studied by evaluating their photocurrent-potential behavior in 1 M NaOH electrolyte under AM 1.5 100 mW cm−2 illumination. Also, the dependence of the photocatalytic ability of the α-Fe2O3 nanorod arrays on their length was studied and the optimum rod length was determined.

Graphical abstract: Synthesis and photoelectrochemical cell properties of vertically grown α-Fe2O3 nanorod arrays on a gold nanorod substrate

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Publication details

The article was received on 21 Oct 2009, accepted on 22 Dec 2009 and first published on 02 Feb 2010


Article type: Paper
DOI: 10.1039/B921965J
Citation: J. Mater. Chem., 2010,20, 2247-2250
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    Synthesis and photoelectrochemical cell properties of vertically grown α-Fe2O3 nanorod arrays on a gold nanorod substrate

    A. Mao, G. Y. Han and J. H. Park, J. Mater. Chem., 2010, 20, 2247
    DOI: 10.1039/B921965J

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