Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 배지현 | - |
dc.date.accessioned | 2018-03-16T07:15:59Z | - |
dc.date.available | 2018-03-16T07:15:59Z | - |
dc.date.issued | 2014-03 | - |
dc.identifier.citation | Sensors and Actuators B: Chemical, Vol.193[31/March/2014], pp. 574-581 | en_US |
dc.identifier.issn | 0925-4005 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0925400513014846 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/48065 | - |
dc.description.abstract | In this work, we report a remarkably improved toluene response and superior cross-sensitivity against H2S molecules by combining Pd catalysts and highly porous WO3 nanofibers (NFs). We functionalized Pd catalysts inside and/or outside of WO3 NFs synthesized by electrospinning, which is a facile and versatile process for producing webs of metal oxide NFs. Pd-embedded WO3 NFs were obtained by the electrospinning of a Pd and W composite precursor/poly(methyl methacrylate) (PMMA) solution followed by calcination at 700 °C. Pd nanoparticles (NPs) (6?10 nm) synthesized by a polyol method were decorated on the WO3 NFs (Pd-NPs/WO3 NFs) by the attachment of the Pd NPs on as-prepared WO3 NFs. The gas sensing characteristics of pure WO3, Pd-embedded WO3, Pd-NPs/WO3, and Pd-NPs/Pd-embedded WO3 NFs were tested using H2S and toluene gases in a highly humid atmosphere (RH 90%), which is similar to human exhaled breath. The results showed that the Pd-NPs/Pd-embedded WO3 NFs whose inner and outer layers were decorated by Pd catalysts, exhibited a high toluene response (Rair/Rgas = 5.5 at 1 ppm) and remarkable selectivity against H2S (Rair/Rgas = 1.36 at 1 ppm) at 350 °C, whereas pristine WO3 NFs showed superior H2S response (Rair/Rgas = 11.1 at 1 ppm) along with a negligible response toward toluene (Rair/Rgas = 1.27 at 1 ppm). The highly porous WO3 NFs decorated with Pd catalysts, exhibited potential feasibility, i.e., a low limit of detection (LOD) of 20 ppb (Rair/Rgas = 1.32) at 350 °C, for application in VOCs sensors, particularly for diagnoses of lung cancer. | en_US |
dc.description.sponsorship | This work was supported by the Center for Integrated SmartSensors (CISS-2012M3A6A6054188) and the Center for AdvancedSoft Electronics (Code No. 2011-0032154) funded by the Ministryof Science, ICT & Future Planning as Global Frontier Project. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Elsevier Sequoia | en_US |
dc.subject | Electrospinning | en_US |
dc.subject | Catalyst | en_US |
dc.subject | Exhaled breath sensor | en_US |
dc.subject | Tungsten oxide | en_US |
dc.subject | Palladium | en_US |
dc.title | Highly sensitive and selective hydrogen sulfide and toluene sensors using Pd fuctionalized WO3 nanofibers for potential diagnosis of halitosis and lug cancer | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.snb.2013.12.011 | - |
dc.relation.journal | SENSORS AND ACTUATORS B-CHEMICAL | - |
dc.contributor.googleauthor | Kim, Nam-Hoon | - |
dc.contributor.googleauthor | Choi, Seon-Jin | - |
dc.contributor.googleauthor | Yang, Dae-Jin | - |
dc.contributor.googleauthor | Bae, Jihyun | - |
dc.contributor.googleauthor | Park, Jongjin | - |
dc.contributor.googleauthor | Kim, Il-Doo | - |
dc.contributor.googleauthor | 배지현 | - |
dc.relation.code | 2014039365 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF HUMAN ECOLOGY[S] | - |
dc.sector.department | DEPARTMENT OF CLOTHING & TEXTILES | - |
dc.identifier.pid | jbae2 | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.