Novel Templating Route Using Pt Infiltrated Block Copolymer Microparticles for Catalytic Pt Functionalized Macroporous WO3 Nanofibers and Its Application in Breath Pattern Recognition

Seon Jin Choi, Kang Hee Ku, Bumjoon J. Kim, Il Doo Kim

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

We propose a new route for transferring catalysts onto macroporous metal oxide nanofibers (NFs) using metallic nanoparticles (NPs) infiltrated block copolymer microparticles as sacrificial templates. Pt decorated polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) copolymer microparticles (Pt-BCP MPs), produced from oil-in-water emulsions, were uniformly dispersed within electrospun PVP/W precursor composite NFs. The macropore-loaded WO3 NFs (macroporous Pt-WO3 NFs), which are additionally functionalized by Pt NPs (10 nm), were achieved by decomposition of polymeric components and oxidization of W precursor after high-temperature calcination. In particular, macropores with the similar size distribution (50-300 nm) with BCP MPs were also formed on interior and exterior of WO3 NFs. Chemical sensing performance of macroporous Pt-WO3 NFs was investigated for pattern recognition of simulated breath gas components at highly humid ambient (95% RH). The result revealed that superior hydrogen sulfide sensitivity (Rair/Rgas = 834.2 ± 20.1 at 5 ppm) and noticeable selectivity were achieved. In addition, H2S pattern recognition against other chemical components (acetone, toluene, and methyl mercaptan) was clearly identified without any overlapping of each pattern. This work demonstrates the potential application of BCP-templated maroporous Pt-WO3 NFs in exhaled breath analysis for noninvasive monitoring of physical conditions.

Original languageEnglish
Pages (from-to)1124-1131
Number of pages8
JournalACS Sensors
Volume1
Issue number9
DOIs
StatePublished - 2016 Sep 23

Keywords

  • WO nanofibers
  • block copolymer
  • catalyst
  • chemical sensors
  • electrospinning
  • pattern recognition

Fingerprint Dive into the research topics of 'Novel Templating Route Using Pt Infiltrated Block Copolymer Microparticles for Catalytic Pt Functionalized Macroporous WO<sub>3</sub> Nanofibers and Its Application in Breath Pattern Recognition'. Together they form a unique fingerprint.

  • Cite this