Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 184, Issue 8, Pages 2190-2195Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.06.024
Keywords
Ag/AgCl/W18O49 NRs; Photochemical; Gas-sensing properties; Photocatalyst
Funding
- National Natural Science Foundation of China [50572041]
- Application Foundation Research Program of Qingdao [09-1-3-27-jch]
- Shanghai Maritime University [20110026]
- Shanghai Education Commission [10ZZ98]
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A novel gas-sensing material and photocatalyst was successfully obtained by decorating Ag/AgCl nanoparticles on the W18O49 nanorods through a clean photochemical route. The as-prepared samples were characterized using combined techniques of X-ray diffractometry, electron microscopy, energy dispersive X-ray spectrometry, and X-ray photoelectron spectroscopy. Gas-sensing measurements indicate that the Ag/AgCl/W18O49 NRs sensors exhibit superior reducing gas-sensing properties to those of bare W18O49 NRs, and they are highly selective and sensitive to NH3, acetone, and H2S with short response and recovery times. The Ag/AgCl/W18O49 NRs photocatlysts also possess higher photocatalytic performance than bare W18O49 NRs for degradation of methyl orange under simulated sunlight irradiation. Possible mechanisms concerning the enhancement of gas-sensing and photocatalytic activities of the Ag/AgCl/W18O49 NRs composite were proposed. (C) 2011 Elsevier Inc. All rights reserved.
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