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Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO 2 nanofibres

Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO 2 nanofibres

Avishek Saha, Alicia Moya, Axel Kahnt, Daniel Iglesias, Silvia Marchesan, Reinhold Wannemacher, Maurizio Prato, Juan J Vilatela, Dirk M Guldi

Nanoscale. 2017 Jun 14;9(23):7911-7921.

PMID: 28569304

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS71726	Carbon nanotube, multi-walled, carboxylic acid functionalized			Price

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