Rapid Microwave-Assisted Nonaqueous Synthesis and Growth Mechanism of AgCl/Ag, and Its Daylight-Driven Plasmonic Photocatalysis
✍ Scribed by Jing Jiang; Prof. Dr. Lizhi Zhang
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 451 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0947-6539
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✦ Synopsis
Abstract
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 mW cm^−2^). The AgCl/Ag has also been found to display a superior ability to harvest diffuse indoor daylight (ca. 5 mW cm^−2^), and could complete the degradation of 10 mg L^−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.