Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 134, Issue -, Pages 46-54Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2012.12.041
Keywords
High-efficiency visible-light photocatalyst; Silver carbonate; Universal degradation performance; Theory calculation; Photodegradation mechanism; Photoreaction approach
Funding
- National Nature Science Foundation of China [21071036, 21271055]
- Province Natural Science Foundation of Heilongjiang Province [ZD201011]
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A novel high-efficiency visible-light sensitive Ag2CO3 semiconductor photocatalyst was prepared by a simple ion-exchange method based on a strategy incorporating of p-block C element into a narrow bandgap Ag2O. This photocatalyst exhibits universal high-efficient degradation ability for typically several RhB, MO and MB dyes. Getting insight into degradation patterns of dyes over Ag2CO3 identifies they are self-oxidation behavior of semiconductor rather than the effect of photosensitization. The reaction mechanism investigated by a series of radical trapping experiments, not only ascertains the major photoreaction approaches of dyes on the surface of Ag2CO3, but also reveals the unique universality advantage that arises from selective using one of many activated species to decompose many kinds of dyes such as RhB, MO and MB. The theoretical calculation based on first-principles provides inherently essential evidences for high-efficient oxidation performance of Ag2CO3 photocatalyst. (c) 2013 Elsevier B.V. All rights reserved.
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