Electronic Structure of Epitaxial Sn-Doped Anatase Grown on SrTiO3(001) by Dip Coating

F. E. Oropeza; K. H. L. Zhang; R. G. Palgrave; A. Regoutz; R. G. Egdell; N. M. Galea; G. W. Watson; J.P.  Allen

doi:10.1021/jp405054t

Electronic Structure of Epitaxial Sn-Doped Anatase Grown on SrTiO3(001) by Dip Coating

F. E. Oropeza, K. H. L. Zhang, R. G. Palgrave, A. Regoutz, R. G. Egdell^*, N. M. Galea, G. W. Watson, J.P. Allen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Sn doping in the anatase polymorph of TiO2 promotes transformation to the thermodynamically stable rutile phase at much lower temperature than found for the undoped material. Here it is shown that the anatase-to-rutile phase transition in Sn-doped TiO2 is inhibited in epitaxial (001) oriented films grown on SrTiO3(001) by a dip coating procedure. X-ray photoemission spectroscopy demonstrates that there is pronounced segregation of Sn to the anatase (001) surface and that the bandgap increases with Sn doping level. This behavior is in contrast to that found in the rutile phase of Sn-doped TiO2, where the bandgap initially decreases for low levels of Sn doping. Pure SnO2 cannot be stabilized by epitaxy in the anatase phase even though good matching between anatase SnO2(001) and SrTiO3(001) is predicted by density functional theory calculations.

Original language	English
Pages (from-to)	15221-15228
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	117
Issue number	29
DOIs	https://doi.org/10.1021/jp405054t
Publication status	Published - 25 Jul 2013
Externally published	Yes

Keywords

VISIBLE-LIGHT PHOTOCATALYSIS
MOLECULAR-BEAM EPITAXY
AUGMENTED-WAVE METHOD
TITANIUM-DIOXIDE
TIN(IV) OXIDE
SOLID-SOLUTIONS
TIO2 SURFACES
O-2 EVOLUTION
RUTILE
TRANSFORMATION

Access to Document

10.1021/jp405054tLicence: CC BY-NC-ND

Cite this

@article{5b3809f0b61b41d29cecc0f5f34ddae3,

title = "Electronic Structure of Epitaxial Sn-Doped Anatase Grown on SrTiO3(001) by Dip Coating",

abstract = "Sn doping in the anatase polymorph of TiO2 promotes transformation to the thermodynamically stable rutile phase at much lower temperature than found for the undoped material. Here it is shown that the anatase-to-rutile phase transition in Sn-doped TiO2 is inhibited in epitaxial (001) oriented films grown on SrTiO3(001) by a dip coating procedure. X-ray photoemission spectroscopy demonstrates that there is pronounced segregation of Sn to the anatase (001) surface and that the bandgap increases with Sn doping level. This behavior is in contrast to that found in the rutile phase of Sn-doped TiO2, where the bandgap initially decreases for low levels of Sn doping. Pure SnO2 cannot be stabilized by epitaxy in the anatase phase even though good matching between anatase SnO2(001) and SrTiO3(001) is predicted by density functional theory calculations.",

keywords = "VISIBLE-LIGHT PHOTOCATALYSIS, MOLECULAR-BEAM EPITAXY, AUGMENTED-WAVE METHOD, TITANIUM-DIOXIDE, TIN(IV) OXIDE, SOLID-SOLUTIONS, TIO2 SURFACES, O-2 EVOLUTION, RUTILE, TRANSFORMATION",

author = "Oropeza, {F. E.} and Zhang, {K. H. L.} and Palgrave, {R. G.} and A. Regoutz and Egdell, {R. G.} and Galea, {N. M.} and Watson, {G. W.} and J.P. Allen",

year = "2013",

month = jul,

day = "25",

doi = "10.1021/jp405054t",

language = "English",

volume = "117",

pages = "15221--15228",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "29",

}

TY - JOUR

T1 - Electronic Structure of Epitaxial Sn-Doped Anatase Grown on SrTiO3(001) by Dip Coating

AU - Oropeza, F. E.

AU - Zhang, K. H. L.

AU - Palgrave, R. G.

AU - Regoutz, A.

AU - Egdell, R. G.

AU - Galea, N. M.

AU - Watson, G. W.

AU - Allen, J.P.

PY - 2013/7/25

Y1 - 2013/7/25

N2 - Sn doping in the anatase polymorph of TiO2 promotes transformation to the thermodynamically stable rutile phase at much lower temperature than found for the undoped material. Here it is shown that the anatase-to-rutile phase transition in Sn-doped TiO2 is inhibited in epitaxial (001) oriented films grown on SrTiO3(001) by a dip coating procedure. X-ray photoemission spectroscopy demonstrates that there is pronounced segregation of Sn to the anatase (001) surface and that the bandgap increases with Sn doping level. This behavior is in contrast to that found in the rutile phase of Sn-doped TiO2, where the bandgap initially decreases for low levels of Sn doping. Pure SnO2 cannot be stabilized by epitaxy in the anatase phase even though good matching between anatase SnO2(001) and SrTiO3(001) is predicted by density functional theory calculations.

AB - Sn doping in the anatase polymorph of TiO2 promotes transformation to the thermodynamically stable rutile phase at much lower temperature than found for the undoped material. Here it is shown that the anatase-to-rutile phase transition in Sn-doped TiO2 is inhibited in epitaxial (001) oriented films grown on SrTiO3(001) by a dip coating procedure. X-ray photoemission spectroscopy demonstrates that there is pronounced segregation of Sn to the anatase (001) surface and that the bandgap increases with Sn doping level. This behavior is in contrast to that found in the rutile phase of Sn-doped TiO2, where the bandgap initially decreases for low levels of Sn doping. Pure SnO2 cannot be stabilized by epitaxy in the anatase phase even though good matching between anatase SnO2(001) and SrTiO3(001) is predicted by density functional theory calculations.

KW - VISIBLE-LIGHT PHOTOCATALYSIS

KW - MOLECULAR-BEAM EPITAXY

KW - AUGMENTED-WAVE METHOD

KW - TITANIUM-DIOXIDE

KW - TIN(IV) OXIDE

KW - SOLID-SOLUTIONS

KW - TIO2 SURFACES

KW - O-2 EVOLUTION

KW - RUTILE

KW - TRANSFORMATION

U2 - 10.1021/jp405054t

DO - 10.1021/jp405054t

M3 - Article

SN - 1932-7447

VL - 117

SP - 15221

EP - 15228

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 29

ER -

Electronic Structure of Epitaxial Sn-Doped Anatase Grown on SrTiO3(001) by Dip Coating

Abstract

Keywords

Access to Document

Fingerprint

Cite this