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Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance

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Electrospun Black Titania Nanofibers : Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance. / Lepcha, A.; Maccato, C.; Mettenbörger, A.; Andreu, T.; Mayrhofer, L.; Walter, M.; Olthof, S.; Ruoko, T. P.; Klein, A.; Moseler, M.; Meerholz, K.; Morante, J. R.; Barreca, D.; Mathur, S.

In: Journal of Physical Chemistry C, Vol. 119, No. 33, 20.08.2015, p. 18835-18842.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Lepcha, A, Maccato, C, Mettenbörger, A, Andreu, T, Mayrhofer, L, Walter, M, Olthof, S, Ruoko, TP, Klein, A, Moseler, M, Meerholz, K, Morante, JR, Barreca, D & Mathur, S 2015, 'Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance', Journal of Physical Chemistry C, vol. 119, no. 33, pp. 18835-18842. https://doi.org/10.1021/acs.jpcc.5b02767

APA

Lepcha, A., Maccato, C., Mettenbörger, A., Andreu, T., Mayrhofer, L., Walter, M., ... Mathur, S. (2015). Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance. Journal of Physical Chemistry C, 119(33), 18835-18842. https://doi.org/10.1021/acs.jpcc.5b02767

Vancouver

Lepcha A, Maccato C, Mettenbörger A, Andreu T, Mayrhofer L, Walter M et al. Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance. Journal of Physical Chemistry C. 2015 Aug 20;119(33):18835-18842. https://doi.org/10.1021/acs.jpcc.5b02767

Author

Lepcha, A. ; Maccato, C. ; Mettenbörger, A. ; Andreu, T. ; Mayrhofer, L. ; Walter, M. ; Olthof, S. ; Ruoko, T. P. ; Klein, A. ; Moseler, M. ; Meerholz, K. ; Morante, J. R. ; Barreca, D. ; Mathur, S. / Electrospun Black Titania Nanofibers : Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance. In: Journal of Physical Chemistry C. 2015 ; Vol. 119, No. 33. pp. 18835-18842.

Bibtex - Download

@article{04914212ea4742dc979aa9c518a4df2b,
title = "Electrospun Black Titania Nanofibers: Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance",
abstract = "This work encompasses a facile method for tailoring surface defects in electrospun TiO2 nanofibers by employing hydrogen plasma treatments. This amiable processing method was proven with SQUID, EPR, and XPS to be highly effective in generating oxygen vacancies, accompanied by the reduction of Ti4+ centers to Ti3+, resulting in the formation of black titania. The treatment temperature was found to affect the Ti3+/Ti4+ ratios and surface valence, while preserving the original 1D morphology of the titania fibers. Ab initio DFT calculations showed that a high concentration of oxygen vacancies is highly efficient in producing midgap states that enhance the system absorption over the whole visible range, as observed with UV/vis/NIR diffuse reflectance spectroscopy. Pristine TiO2 nanofibers produced a photocurrent density of similar to 0.02 mA/cm(2) at 1.23 V vs RHE, whereas the hydrogen plasma treatment resulted in up to a 10-fold increase in the photoelectrochemical performance.",
keywords = "ROOM-TEMPERATURE, WATER, SURFACE, NANOSTRUCTURES, NANOPARTICLES, PHOTOCATALYSIS, INSULATORS, CONVERSION, DEFECTS, ARRAYS",
author = "A. Lepcha and C. Maccato and A. Mettenb{\"o}rger and T. Andreu and L. Mayrhofer and M. Walter and S. Olthof and Ruoko, {T. P.} and A. Klein and M. Moseler and K. Meerholz and Morante, {J. R.} and D. Barreca and S. Mathur",
year = "2015",
month = "8",
day = "20",
doi = "10.1021/acs.jpcc.5b02767",
language = "English",
volume = "119",
pages = "18835--18842",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society ACS",
number = "33",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Electrospun Black Titania Nanofibers

T2 - Influence of Hydrogen Plasma-Induced Disorder on the Electronic Structure and Photoelectrochemical Performance

AU - Lepcha, A.

AU - Maccato, C.

AU - Mettenbörger, A.

AU - Andreu, T.

AU - Mayrhofer, L.

AU - Walter, M.

AU - Olthof, S.

AU - Ruoko, T. P.

AU - Klein, A.

AU - Moseler, M.

AU - Meerholz, K.

AU - Morante, J. R.

AU - Barreca, D.

AU - Mathur, S.

PY - 2015/8/20

Y1 - 2015/8/20

N2 - This work encompasses a facile method for tailoring surface defects in electrospun TiO2 nanofibers by employing hydrogen plasma treatments. This amiable processing method was proven with SQUID, EPR, and XPS to be highly effective in generating oxygen vacancies, accompanied by the reduction of Ti4+ centers to Ti3+, resulting in the formation of black titania. The treatment temperature was found to affect the Ti3+/Ti4+ ratios and surface valence, while preserving the original 1D morphology of the titania fibers. Ab initio DFT calculations showed that a high concentration of oxygen vacancies is highly efficient in producing midgap states that enhance the system absorption over the whole visible range, as observed with UV/vis/NIR diffuse reflectance spectroscopy. Pristine TiO2 nanofibers produced a photocurrent density of similar to 0.02 mA/cm(2) at 1.23 V vs RHE, whereas the hydrogen plasma treatment resulted in up to a 10-fold increase in the photoelectrochemical performance.

AB - This work encompasses a facile method for tailoring surface defects in electrospun TiO2 nanofibers by employing hydrogen plasma treatments. This amiable processing method was proven with SQUID, EPR, and XPS to be highly effective in generating oxygen vacancies, accompanied by the reduction of Ti4+ centers to Ti3+, resulting in the formation of black titania. The treatment temperature was found to affect the Ti3+/Ti4+ ratios and surface valence, while preserving the original 1D morphology of the titania fibers. Ab initio DFT calculations showed that a high concentration of oxygen vacancies is highly efficient in producing midgap states that enhance the system absorption over the whole visible range, as observed with UV/vis/NIR diffuse reflectance spectroscopy. Pristine TiO2 nanofibers produced a photocurrent density of similar to 0.02 mA/cm(2) at 1.23 V vs RHE, whereas the hydrogen plasma treatment resulted in up to a 10-fold increase in the photoelectrochemical performance.

KW - ROOM-TEMPERATURE

KW - WATER

KW - SURFACE

KW - NANOSTRUCTURES

KW - NANOPARTICLES

KW - PHOTOCATALYSIS

KW - INSULATORS

KW - CONVERSION

KW - DEFECTS

KW - ARRAYS

UR - http://www.scopus.com/inward/record.url?scp=84939825598&partnerID=8YFLogxK

U2 - 10.1021/acs.jpcc.5b02767

DO - 10.1021/acs.jpcc.5b02767

M3 - Article

VL - 119

SP - 18835

EP - 18842

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 33

ER -