Efficient Charge Separation of In-Situ Nb-Doped TiO2 Nanowires for Photoelectrochemical Water–splitting

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

14 Scopus Citations
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Author(s)

  • Zhangliu Tian
  • Houlei Cui
  • Guilian Zhu
  • Feng Shao
  • Jianqiao He
  • Fuqiang Huang

Detail(s)

Original languageEnglish
Pages (from-to)2822-2827
Journal / PublicationChemistrySelect
Volume2
Issue number9
Publication statusPublished - 23 Mar 2017
Externally publishedYes

Abstract

One-dimensional TiO<sub>2</sub> nanowire is the top-performing semiconductor among photoanodes for photoelectrochemical water splitting, but still limited to a fraction of the theoretically photocurrent because of modest charge transport and low charge separation properties. Here, we demonstrate high-crystallized nanowires of Nb-doped rutile TiO<sub>2</sub> for significantly increasing electron carrier density through a convenient method. The optimized Nb-doped TiO<sub>2</sub> nanowires (0.5 mol% in the Nb/Ti ratio) yield a high value of charge separation efficiency (η<sub>sep</sub>) of 97.39% at 1.23 V<sub>RHE</sub>, which is about 3 times as much as that of pristine sample (33.61% at 1.23 V<sub>RHE</sub>). Moreover, the photoanode of Nb-doped TiO<sub>2</sub> nanowires can achieve high charge transfer efficiency (η<sub>trans</sub>) (91.07% at 1.23 V<sub>RHE</sub>) without any oxygen evolution reaction catalysts. These results indicate that through appropriate amount of Nb doping can move the performance of TiO<sub>2</sub> nanowires to their theoretical potential. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Research Area(s)

  • charge separation efficiencies, Nb doping, TiO2, water-splitting

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Citation Format(s)

Efficient Charge Separation of In-Situ Nb-Doped TiO2 Nanowires for Photoelectrochemical Water–splitting. / Tian, Zhangliu; Cui, Houlei; Xu, Jijian et al.
In: ChemistrySelect, Vol. 2, No. 9, 23.03.2017, p. 2822-2827.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review