Preparation of Visible-light Responsive Rutile-TiO2(110) Wafer with Well-defined Surface by Chromium and Antimony Codoping

Transition-metal doping for titanium dioxide (TiO2) is attracting attention for the study of visible-light responsive photocatalyst. Its photocatalytic properties were investigated via various spectroscopic approaches, though surface studies had not yet progressed owing to the difficulty in obtainin...

Full description

Saved in:
Bibliographic Details
Published inE-journal of surface science and nanotechnology Vol. 17; p. 5
Main Authors Kitta, Mitsunori, Onishi, Hiroshi
Format Journal Article
LanguageEnglish
Japanese
Published Tokyo Japan Science and Technology Agency 01.01.2019
Subjects
Antimony
Atomic force microscopy
Chromium
Crystallization
Morphology
Photocatalysis
Rutile
Surface structure
Titanium
Titanium dioxide
Transition metals
Online AccessGet full text

Cover

More Information
Summary:Transition-metal doping for titanium dioxide (TiO2) is attracting attention for the study of visible-light responsive photocatalyst. Its photocatalytic properties were investigated via various spectroscopic approaches, though surface studies had not yet progressed owing to the difficulty in obtaining its well-defined surface. In this report, we propose that a well-defined crystalline TiO2(110) surface may be obtained by the codoping of chromium (Cr) and antimony (Sb) with commercially available wafers. Cr and Sb are codoped by a solid-state reaction of TiO2(110) wafer and dopant powder. The prepared wafer exhibited visible-light responsivity on absorption below wavelengths of 600 nm. The surface morphology characterization, performed by atomic force microscopy (AFM) revealed that the Cr and Sb codoped TiO2(110) surface has a well crystallized step-terrace structure that is atomically flat, while monodoped TiO2(110) surface does not. The codoping of Cr and Sb with TiO2(110) wafer should contributes towards retaining the stable rutile-TiO2 lattice structure and produces a well-defined TiO2(110) surface structure with visible-light responsive characteristics.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1348-0391
DOI:10.1380/ejssnt.2019.5