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Photodegradation of methyl orange and 2,3-butanedione on titanium-dioxide nanotube arrays efficiently synthesized on titanium coils

Paper ID Volume ID Publish Year Pages File Format Full-Text
46568 46442 2011 8 PDF Available
Title
Photodegradation of methyl orange and 2,3-butanedione on titanium-dioxide nanotube arrays efficiently synthesized on titanium coils
Abstract

This work presents the synthesis, characterization, and application of titanium dioxide nanotube arrays (T-NT) prepared on titanium coils by anodization. A comparison of the physical, photoelectrochemical, and photocatalytic properties of T-NT on coil, mesh, and foil architectures is reported. The application of T-NT on helical coils to UV–vis initiated photodegradation of pollutants in aqueous and gaseous phases is discussed. The T-NT on coil shows better photoactivity compared to T-NT on other geometries such as foil and mesh. A 30% increase in the photodegradation of methyl orange in the aqueous phase is noted with T-NT on coils compared to T-NT on mesh. T-NT on coils also demonstrate photodegradation of a model pollutant 2,3-butanedione (diacetyl) in the gaseous phase. The T-NT grown on the coil architecture offer several advantages such as significantly minimized dark spots, highly reduced recombination centers, as well as adjustable spacing and dimensions for tuning photo(electro)catalytic activity. This configuration can be useful in other non-photocatalytic applications as well.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► TiO2 nanotubes (T-NT) on coils identical to T-NT on foil and mesh. ► Methyl orange degradation using T-NT on-coil (X = 0.5) > Mesh (X = 0.3) > foil (X = 0.2). ► Gas phase degradation of diacetyl vapors using T-NT on coils show X = 0.45. ► T-NT on coils offer minimal (i) dark spots and (ii) recombination centers.

Keywords
Photocatalysis; TiO2 nanotubes; Methyl orange; Diacetyl vapors; Coil
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Photodegradation of methyl orange and 2,3-butanedione on titanium-dioxide nanotube arrays efficiently synthesized on titanium coils
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 110, 2 November 2011, Pages 6–13
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us