W{sub 18}O{sub 49} nanorods decorated with Ag/AgCl nanoparticles as highly-sensitive gas-sensing material and visible-light-driven photocatalyst

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

OSTI ID:21580177

Shibin, Sun ^[1]; Lihua, Dong ^[2]; Yidong, Zhang ^[3]; Yanyan, Qiu ^[1]

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1. College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061 (China)
2. Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai 200135 (China)
3. Institute of Surface Micro and Nano Materials, Xuchang University, XuChang 461000 (China)

A novel gas-sensing material and photocatalyst was successfully obtained by decorating Ag/AgCl nanoparticles on the W{sub 18}O{sub 49} 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/W{sub 18}O{sub 49} NRs sensors exhibit superior reducing gas-sensing properties to those of bare W{sub 18}O{sub 49} NRs, and they are highly selective and sensitive to NH{sub 3}, acetone, and H{sub 2}S with short response and recovery times. The Ag/AgCl/W{sub 18}O{sub 49} NRs photocatlysts also possess higher photocatalytic performance than bare W{sub 18}O{sub 49} 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/W{sub 18}O{sub 49} NRs composite were proposed. - Graphical Abstract: The Ag/AgCl nanoparticles adhered well to the W{sub 18}O{sub 49} nanorod. The Ag could act as transfer center of the photoexcited carriers, prohibiting their recombinations in both W{sub 18}O{sub 49} and AgCl. Highlights: > Ag/AgCl/W{sub 18}O{sub 49} NRs were successfully obtained via a clean photochemical route. > The Ag/AgCl nanoparticles decorated on the W{sub 18}O{sub 49} NRs possessed cladding structure. > The Ag/AgCl/W{sub 18}O{sub 49} NRs exhibited excellent gas-sensing and photocatalytic properties.

• OSTI ID: 21580177
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 8; Other Information: DOI: 10.1016/j.jssc.2011.06.024; PII: S0022-4596(11)00350-1; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

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37 INORGANIC
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PHYSICAL AND ANALYTICAL CHEMISTRY
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NANOSTRUCTURES
PARTICLES
PHOTOCATALYSIS
PHOTOCHEMISTRY
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X-RAY PHOTOELECTRON SPECTROSCOPY
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ELECTRON SPECTROSCOPY
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ORGANIC ACIDS
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ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
RADIATIONS
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SILVER COMPOUNDS
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SULFONIC ACIDS
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