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

Saha A, Moya A, Kahnt A, Iglesias D, Marchesan S, Wannemacher R, Prato M, Vilatela JJ, Guldi DM (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Nanoscale Royal Society of Chemistry

Book Volume: 9

Pages Range: 7911-7921

Journal Issue: 23

DOI: 10.1039/c7nr00759k

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.

Authors with CRIS profile

Avishek Saha Lehrstuhl für Physikalische Chemie I Axel Kahnt Lehrstuhl für Physikalische Chemie I Dirk Michael Guldi Lehrstuhl für Physikalische Chemie I

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials (EAM)

Involved external institutions

Fundación IMDEA Instituto Madrileño de Estudios Avanzados ES Spain (ES) Università degli Studi di Trieste IT Italy (IT) IMDEA-Nanociencia ES Spain (ES)

How to cite

APA:

Saha, A., Moya, A., Kahnt, A., Iglesias, D., Marchesan, S., Wannemacher, R.,... Guldi, D.M. (2017). Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO2 nanofibres. Nanoscale, 9(23), 7911-7921. https://doi.org/10.1039/c7nr00759k

MLA:

Saha, Avishek, et al. "Interfacial charge transfer in functionalized multi-walled carbon nanotube@TiO2 nanofibres." Nanoscale 9.23 (2017): 7911-7921.

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