Nanoscale PtO2 Catalysts-Loaded SnO2 Multichannel Nanofibers toward Highly Sensitive Acetone Sensor

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PtO2 nanocatalysts-loaded SnO2 multichannel nanofibers (PtO2-SnO2 MCNFs) were synthesized by single-spinneret electrospinning combined with apoferritin and two immiscible polymers, i.e., poly(vinylpyrrolidone) and polyacrylonitrile. The apoferritin, which can encapsulate nanoparticles within a small inner cavity (8 nm), was used as a catalyst loading template for an effective functionalization of the PtO2 catalysts. Taking advantage of the multichannel structure with a high porosity, effective activation of catalysts on both interior and exterior site of MCNFs was realized. As a result, under high humidity condition (95% RH), PtO2-SnO2 MCNFs exhibited a remarkably high acetone response (R-air/R-gas = 194.15) toward 5 ppm acetone gases, superior selectivity to acetone molecules among various interfering gas species, and excellent stability during 30 cycles of response and recovery toward 1 ppm acetone gases. In this work, we first demonstrate the high suitability of multichannel semiconducting metal oxides structure functionalized by apoferritin-encapsulated catalytic nanoparticles as highly sensitive and selective gas-sensing layer.
Publisher
AMER CHEMICAL SOC
Issue Date
2018-01
Language
English
Article Type
Article
Keywords

POLYSTYRENE COLLOID TEMPLATES; POROUS CARBON NANOFIBERS; GAS-SENSING PROPERTIES; EXHALED-BREATH; SELECTIVE DETECTION; OXIDE NANOSTRUCTURES; HYBRID NANOCOMPOSITE; WO3 NANOFIBERS; METAL; DIAGNOSIS

Citation

ACS APPLIED MATERIALS & INTERFACES, v.10, no.2, pp.2016 - 2025

ISSN
1944-8244
DOI
10.1021/acsami.7b16258
URI
http://hdl.handle.net/10203/240228
Appears in Collection
MS-Journal Papers(저널논문)
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