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Photocatalytic activity and photoinduced hydrophilicity of brookite–heteropolyacid hybrid films

Paper ID Volume ID Publish Year Pages File Format Full-Text
40727 45863 2012 6 PDF Available
Title
Photocatalytic activity and photoinduced hydrophilicity of brookite–heteropolyacid hybrid films
Abstract

After transparent hybrid films of brookite (TiO2) and 12 tungsto(VI) phosphoric acid (PW12) were prepared using layer-by-layer (LBL) processing, a comparative study of photocatalytic decomposition activity and photoinduced hydrophilicity for the films was conducted using gaseous 2-propanol (IPA) decomposition and sessile drop method. The TTP (TiO2/TiO2/PW12) film exhibited better photocatalytic activity on the decomposition of gaseous IPA than that of the TT (TiO2/TiO2) film. Moreover, the TTP film provided a higher hydrophilization rate under UV illumination, and provided better sustainability of the hydrophilicity in the dark than the TT film did. The generation of PW12− by electron transfer from TiO2 to PW12 was inferred as a key factor underpinning the overall performance of wettability conversion before and after UV illumination on this hybrid film.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (90 K)Download as PowerPoint slideHighlights► A transparent PW12/brookite hybrid film was prepared by layer-by-layer process. ► The film exhibited better photocatalytic activity than a brookite film. ► The film also provided a higher hydrophilization rate under UV illumination. ► The electron scavenger effect of PW12 plays an important role on these results.

Keywords
Brookite; Photocatalyst; Layer-by-layer; Keggin; Hydrophilicity
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Photocatalytic activity and photoinduced hydrophilicity of brookite–heteropolyacid hybrid films
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 445–446, 28 November 2012, Pages 274–279
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