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Issue 23, 2017
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Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO2 nanofibres

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Abstract

A new insight into photoinduced charge transfer processes across carbon nanotube@TiO2 interfaces has been gained based on experimental details from transient absorption spectroscopy. We show that photoinduced, interfacial hole transfer to carboxylic acid-functionalized multiwalled carbon nanotubes (oxMWCNTs) from TiO2 results in hole-doped oxMWCNTs and reduced TiO2. The latter is inferred from femto- and nanosecond transient absorption spectroscopy performed with oxMWCNT@TiO2 dispersions and complemented with investigations using methyl viologen and N,N,N′,N′-tetramethyl-p-phenylenediamine as an electron scavenger and a hole scavenger, respectively. The results of ultraviolet photoemission spectroscopy (UPS) of the compounds corroborate the findings, highlighting the strong coupling between oxMWCNTs and TiO2 in these hybrids.

Graphical abstract: Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO2 nanofibres

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Publication details

The article was received on 01 Feb 2017, accepted on 25 Apr 2017 and first published on 28 Apr 2017


Article type: Paper
DOI: 10.1039/C7NR00759K
Citation: Nanoscale, 2017,9, 7911-7921
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    Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO2 nanofibres

    A. Saha, A. Moya, A. Kahnt, D. Iglesias, S. Marchesan, R. Wannemacher, M. Prato, J. J. Vilatela and D. M. Guldi, Nanoscale, 2017, 9, 7911
    DOI: 10.1039/C7NR00759K

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