Effect of oxygen deficiency on the photoresponse and reactivity of mixed phase titania thin films

Journal Article · Sun May 15 04:00:00 EDT 2011 · Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films

DOI:https://doi.org/10.1116/1.3574350· OSTI ID:22054030

DeSario, Paul A; Le, Chen; Graham, Michael E; Gray, Kimberly A ^[1]

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1. Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 (United States)

Nonstoichiometric mixed phased titania nanocomposites (TiO{sub 2-x}) were deposited by reactive direct current magnetron sputtering. The authors explored the role of nonstoichiometry (as defined by oxygen deficiency in synthesis) in mixed phase titania thin films and its effects on the photoresponse and photocatalytic performance for CO{sub 2} reduction to methane under UV and visible light. Oxygen partial pressure was varied during film deposition, yielding different levels of oxygen deficiency in the films. Optimized nonstoichiometric films showed a strong redshift. The authors have identified an optimum set of synthesis conditions for TiO{sub 2-x} films that produce a relative maximum in photocatalytically produced methane under both UV and visible light.

• OSTI ID: 22054030
• Journal Information: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films, Journal Name: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films Journal Issue: 3 Vol. 29; ISSN 1553-1813
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBON DIOXIDE
COMPOSITE MATERIALS
DIRECT CURRENT
MAGNETRONS
METHANE
NANOSTRUCTURES
OXYGEN
PARTIAL PRESSURE
PHOTOCATALYSIS
RED SHIFT
SPUTTERING
SYNTHESIS
THIN FILMS
TITANIUM OXIDES
ULTRAVIOLET RADIATION
VISIBLE RADIATION