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Issue 45, 2011
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Nanocables composed of anatase nanofibers wrapped in UV-light reduced graphene oxide and their enhancement of photoinduced electron transfer in photoanodes

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Abstract

This paper reports a facile method for fabricating a new nanocable structure consisting of reduced graphene oxide (RGO) wrapped anatase TiO2 nanofibers by UV-light photocatalytic reduction. The nanocable was prepared by injecting 0.8 g L−1 aqueous graphene oxide colloid into 0.8 g L−1 electrospun TiO2 nanofibers in ethanol, followed by a mild UV light irradiation for 20 h. The conformal wrapping of RGO is a result of noncovalent interactions (van der Waals and electrostatics). The RGO walls of the nanocables exhibited a uniform thickness of ∼5 nm. Half of the oxygen groups were removed and the partially reduced RGO was favored to be well dispersed in water. The invariability of the ID/IG ratio of the D to G bands in Raman spectra proposed the presence of a “defect-repair” process in the reduction. We further demonstrated the enhancement of photoinduced electron transfer and depression of electron combination by integrating the RGO/TiO2 nanocables into TiO2 photoanodes, proving our nanocables are good candidates for photovoltaic devices.

Graphical abstract: Nanocables composed of anatase nanofibers wrapped in UV-light reduced graphene oxide and their enhancement of photoinduced electron transfer in photoanodes

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Publication details

The article was received on 30 Jul 2011, accepted on 26 Sep 2011 and first published on 12 Oct 2011


Article type: Communication
DOI: 10.1039/C1JM13641K
Citation: J. Mater. Chem., 2011,21, 18174-18179
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    Nanocables composed of anatase nanofibers wrapped in UV-light reduced graphene oxide and their enhancement of photoinduced electron transfer in photoanodes

    Y. Dai, Y. Jing, J. Zeng, Q. Qi, C. Wang, D. Goldfeld, C. Xu, Y. Zheng and Y. Sun, J. Mater. Chem., 2011, 21, 18174
    DOI: 10.1039/C1JM13641K

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