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Surface photovoltage measurements: A quick assessment of the photocatalytic activity?

Paper ID Volume ID Publish Year Pages File Format Full-Text
55051 47038 2013 6 PDF Available
Title
Surface photovoltage measurements: A quick assessment of the photocatalytic activity?
Abstract

Surface photovoltage (SPV) measurements can contribute to a better understanding of electronic properties of photocatalysts under illumination. Direct linking of SPV data to the actual photocatalytic activity remains troublesome. This work aims to discuss SPV measurements from a photocatalytic point of view. By means of several application-based scenarios we illustrate that the trend between SPV and photocatalysis strongly depends on parameters such as the crystal structure, surface modifications, morphology and humidity. This makes the interpretation far from straightforward.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (171 K)Download as PowerPoint slideHighlights► For TiO2 with variable rutile content reaction rate is proportional to surface photovoltage. ► In the range 0.1–1.0 at% Ag on TiO2, the reaction rate is inversely related to SPV. ► For three commercial catalysts the order of SPV response is P25 > P90 > PC500. ► Photocatalytic activity order in aqueous phase is P25 > P90 > PC500, but reversed in gas phase. ► Catalyst humidity has a large influence on the SPV signal.

Keywords
Surface photovoltage; Photocatalysis; Titanium dioxide; Silver; Methylene blue; Acetaldehyde
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Surface photovoltage measurements: A quick assessment of the photocatalytic activity?
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 209, 15 June 2013, Pages 215–220
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