Key Words:X ray photoelectron spectroscopy;Acetone - Azo dyes - Chemical detection - Chlorine compounds - Gas detectors - Gases - Nanoparticles - Nanorods - Photocatalysts - Silver compounds - X ray diffraction analysis;Degradation of methyl oranges - Energy dispersive X-ray spectrometry - Gas sensing material - Gas sensing properties - Photocatalytic activities - Photocatalytic performance - Photochemical - Visible light driven photocatalysts
Abstract:A novel gas-sensing material and photocatalyst was successfully obtained by decorating Ag/AgCl nanoparticles on the W<inf>18</inf>O<inf>49</inf>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<inf>18</inf>O<inf>49</inf>NRs sensors exhibit superior reducing gas-sensing properties to those of bare W<inf>18</inf>O<inf>49</inf>NRs, and they are highly selective and sensitive to NH<inf>3</inf>, acetone, and H<inf>2</inf>S with short response and recovery times. The Ag/AgCl/W<inf>18</inf>O<inf>49</inf>NRs photocatlysts also possess higher photocatalytic performance than bare W<inf>18</inf>O<inf>49</inf>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<inf>18</inf>O<inf>49</inf>NRs composite were proposed. © 2011 Elsevier Inc. All rights reserved.<br/>
Volume:184
Issue:8
Translation or Not:no
