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Visible-light photocatalytic activity of gold nanoparticles supported on template-synthesized mesoporous titania for the decontamination of the chemical warfare agent Soman

Paper ID Volume ID Publish Year Pages File Format Full-Text
47226 46464 2010 7 PDF Available
Title
Visible-light photocatalytic activity of gold nanoparticles supported on template-synthesized mesoporous titania for the decontamination of the chemical warfare agent Soman
Abstract

Mesoporous titania containing gold nanoparticles has been found to be an efficient photocatalyst for the visible-light decontamination of Soman. This contrasts with the complete lack of visible-light activity of analogous mesoporous titania sample without containing Au and is attributed to light absorption by the gold nanoparticles surface plasmon band. The possibility that Soman degradation occurs by light-induced heating is unlikely since no variation of the temperature is observed in the irradiation.The solid photocatalysts have been prepared in a single step in which incorporation of gold and formation of titania occur in the same sol–gel process. It was observed that the molar proportion of Pluronic added to the synthesis sol as template to produce mesoporosity in the material plays an important role controlling the textural properties, surface area and pore diameter, intensity of the surface plasmon band and gold loading of the solid photocatalysts.The visible-light photocatalytic activity of mesoporous titania containing gold nanoparticles towards deadly Soman is remarkable and it constitutes an environmentally friendly system operating under ambient light at the green atmosphere without the need of corrosive or toxic chemicals.

Research highlights▶ Solid catalysts for Fenton reaction are important to avoid the use of stoichiometric amounts of iron salts. ▶ The use of solid catalysts can serve to effect the degradation of pollutants in water using hydrogen peroxide. ▶ Zeolites, hydrotalcites and clays containing iron are the most important heterogeneous catalysts to promote Fenton.

Keywords
Photocatalysis; Visible light; Chemical warfare agents; Soman; Mesoporous titania
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Visible-light photocatalytic activity of gold nanoparticles supported on template-synthesized mesoporous titania for the decontamination of the chemical warfare agent Soman
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 99, Issues 1–2, 31 August 2010, Pages 191–197
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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
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Any Questions? feel free to contact us