Surface Density-of-States Engineering of Anatase TiO2 by Small Polyols for Enhanced Visible-Light Photocurrent Generation | Zendy

Remko Aubert | Zendy; Bart Kenens | Zendy; Maha Chamtouri | Zendy; Yasuhiko Fujita | Zendy; Beatrice Fortuni | Zendy; Gang Lü | Zendy; James A. Hutchison | Zendy; Tomoko Inose | Zendy; Hiroshi Ujii | Zendy

Open Access

Surface Density-of-States Engineering of Anatase TiO₂ by Small Polyols for Enhanced Visible-Light Photocurrent Generation

Author(s) -

Remko Aubert,

Bart Kenens,

Maha Chamtouri,

Yasuhiko Fujita,

Beatrice Fortuni,

Gang Lü,

James A. Hutchison,

Tomoko Inose,

Hiroshi Ujii

Publication year - 2017

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.7b00853

Subject(s) - photocurrent , anatase , visible spectrum , band gap , polyol , materials science , ethylene glycol , photocatalysis , density functional theory , photochemistry , optoelectronics , nanotechnology , chemical engineering , chemistry , catalysis , computational chemistry , organic chemistry , composite material , engineering , polyurethane

Enhancement of visible-light photocurrent generation by sol-gel anatase TiO 2 films was achieved by binding small polyol molecules to the TiO 2 surface. Binding ethylene glycol onto the surface, enhancement factors up to 2.8 were found in visible-light photocurrent generation experiments. Density functional theory calculations identified midgap energy states that emerge as a result of the binding of a range of polyols to the TiO 2 surface. The presence and energy of the midgap state is predicted to depend sensitively on the structure of the polyol, correlating well with the photocurrent generation results. Together, these results suggest a new, facile, and cost-effective route to precise surface band gap engineering of TiO 2 toward visible-light-induced photocatalysis and energy storage.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research