Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 13, Pages 3710-3717Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201002951
Keywords
microwave chemistry; photocatalysis; silver; silver chloride; surface plasmon resonance
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Funding
- National Basic Research Program of China (973 Program) [2007CB613301]
- National Science Foundation of China [21073069, 91023010]
- Program for Innovation Team of Hubei Province [2009CDA048]
- CCNU from Colleges' Basic Research and Operation of MOE [CCNU09C01009]
- Program for New Century Excellent Talents in University [NCET-07-0352]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT0953]
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We report on a rapid microwave-assisted nonaqueous synthesis and the growth mechanism of AgCl/Ag with controlled size and shape. By rationally varying the reaction temperature and the microwave irradiation time, we achieved the transformation of nanocubes to rounded triangular pyramids by a combined process of oriented attachment and Ostwald ripening. The surface plasmon resonance (SPR) properties of the as-prepared AgCl/Ag have been found to be somewhat dependent on the size, morphology, and composition. The as-prepared AgCl/Ag exhibits high photocatalytic activity and good reusability for decomposing organic pollutants (such as methyl orange (MO), rhodamine B (RhB), and pentachlorophenol (PCP)) under indoor artificial daylight illumination (ca. 1 mWcm(-2)). The AgCl/Ag has also been found to display a superior ability to harvest diffuse indoor daylight (ca. 5 mWcm(-2)), and could complete the degradation of 10 mgL(-1) MO within 15 min. Experiments involving the trapping of active species have shown that the photocatalytic degradation of organic pollutants in the AgCl/Ag system may proceed through direct hole transfer. This study has revealed that plasmonic daylight photocatalysis may open a new frontier for indoor pollutant control around the clock under fluorescent lamp illumination.
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