Chemical vapor deposition of photocatalytically active pure brookite TiO2 thin films
File(s)Manuscript for publication (Parkin et al).doc (3 MB)
Accepted version
Author(s)
Alotaibi, Abdullah M
Sathasivam, Sanjayan
Williamson, Benjamin AD
Kafizas, Andreas
Sotelo-Vazquez, Carlos
Type
Journal Article
Abstract
Brookite is the least investigated phase of TiO2 due to the synthetic difficulty of obtaining the pure phase. Here, we present the first ever chemical vapor deposition synthesis of pure brookite TiO2 thin films. The films were highly crystalline and phase pure as determined by X-ray diffraction and Raman spectroscopy studies. Scanning electron microscopy studies showed the films to have a structured morphology consisting of pyramidal features. The photocatalytic properties of the brookite film, tested using stearic acid under UVA (365 nm) irradiation, were superior to both an anatase film grown under similar conditions and NSG Activ glass. Transient absorption spectroscopy showed that the innate electron–hole recombination dynamics are similar in brookite and anatase, akin to previous reports. The superior activity of the brookite film is hence attributed to the higher surface area compared to anatase.
Date Issued
2018-02-27
Date Acceptance
2018-02-05
Citation
Chemistry of Materials, 2018, 30 (4), pp.1353-1361
ISSN
0897-4756
Publisher
American Chemical Society
Start Page
1353
End Page
1361
Journal / Book Title
Chemistry of Materials
Volume
30
Issue
4
Copyright Statement
© 2018 American Chemical Society.
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000426614200017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Multidisciplinary
Chemistry
Materials Science
TRANSIENT ABSORPTION-SPECTROSCOPY
INITIO MOLECULAR-DYNAMICS
TOTAL-ENERGY CALCULATIONS
WAVE BASIS-SET
TITANIUM-DIOXIDE
RAMAN-SPECTRUM
ANATASE TIO2
RUTILE
PHASE
SEMICONDUCTORS
Publication Status
Published
Date Publish Online
2018-02-05