Selectivity enhancement of SnO2 nanofiber gas sensors by functionalization with Pt nanocatalysts and manipulation of the operation temperature

Bong Hoon Jang; Osnat Landau; Seon Jin Choi; Jungwoo Shin; Avner Rothschild; Il Doo Kim

doi:10.1016/j.snb.2013.07.011

Selectivity enhancement of SnO₂ nanofiber gas sensors by functionalization with Pt nanocatalysts and manipulation of the operation temperature

Bong Hoon Jang, Osnat Landau, Seon Jin Choi, Jungwoo Shin, Avner Rothschild, Il Doo Kim

Technion - Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

We report on facile synthesis of SnO₂ nanofibers (NFs) functionalized by Pt nanoparticles (NPs) with various loading contents (0.05-0.4 wt%) and their gas response toward H₂, NO₂, NH ₃, CO, and SO₂ gases as a function of the operation temperature (100-450 C) and gas concentration (0.125-2.5 ppm). Mesoporous SnO₂ NFs with large surface-to-volume ratio, which facilitates sensitive gas response, were synthesized by electrospinning followed by subsequent calcination at 500 C for 2 h. Colloidal Pt NPs synthesized by simple polyol method were immobilized on SnO₂ NFs as a catalytic sensitizer to H₂ oxidation. The gas sensing properties and response kinetics were significantly affected by the Pt NPs and the operation temperature. It was found that 0.1 wt% Pt-loaded SnO₂ sensor showed the highest H ₂ response (I_gas/I_air = 16.6 at 2.5 ppm) at 300 C. A remarkably high NO₂ response (I_air/I_gas = 57.0 at 2.5 ppm) was achieved in the case of pristine SnO₂ sensor at 150 C. This work demonstrates that sensitive and selective detection of H ₂ and NO₂ gases with negligible cross-response to interfering gases such as NH₃, CO, and SO₂ can be obtained by decoration with Pt NPs on metal oxide NFs in conjunction with manipulation of the operation temperature.

Original language	English
Pages (from-to)	156-168
Number of pages	13
Journal	Sensors and Actuators, B: Chemical
Volume	188
DOIs	https://doi.org/10.1016/j.snb.2013.07.011
State	Published - 2013

Keywords

Electrospinning
Gas sensor
Nanofibers
Pt catalyst
Tin oxide

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1016/j.snb.2013.07.011

Cite this

@article{129d98897c8b4060b6607bcc15ab4021,

title = "Selectivity enhancement of SnO2 nanofiber gas sensors by functionalization with Pt nanocatalysts and manipulation of the operation temperature",

abstract = "We report on facile synthesis of SnO2 nanofibers (NFs) functionalized by Pt nanoparticles (NPs) with various loading contents (0.05-0.4 wt\%) and their gas response toward H2, NO2, NH 3, CO, and SO2 gases as a function of the operation temperature (100-450 C) and gas concentration (0.125-2.5 ppm). Mesoporous SnO2 NFs with large surface-to-volume ratio, which facilitates sensitive gas response, were synthesized by electrospinning followed by subsequent calcination at 500 C for 2 h. Colloidal Pt NPs synthesized by simple polyol method were immobilized on SnO2 NFs as a catalytic sensitizer to H2 oxidation. The gas sensing properties and response kinetics were significantly affected by the Pt NPs and the operation temperature. It was found that 0.1 wt\% Pt-loaded SnO2 sensor showed the highest H 2 response (Igas/Iair = 16.6 at 2.5 ppm) at 300 C. A remarkably high NO2 response (Iair/Igas = 57.0 at 2.5 ppm) was achieved in the case of pristine SnO2 sensor at 150 C. This work demonstrates that sensitive and selective detection of H 2 and NO2 gases with negligible cross-response to interfering gases such as NH3, CO, and SO2 can be obtained by decoration with Pt NPs on metal oxide NFs in conjunction with manipulation of the operation temperature.",

keywords = "Electrospinning, Gas sensor, Nanofibers, Pt catalyst, Tin oxide",

author = "Jang, \{Bong Hoon\} and Osnat Landau and Choi, \{Seon Jin\} and Jungwoo Shin and Avner Rothschild and Kim, \{Il Doo\}",

note = "Funding Information: This research was supported by a grant from the Ministry of Research, Korea and the Israeli Ministry of Science and Technology (Grant no. 3-8272 ). This work was also supported by the Center for Integrated Smart Sensors funded by the Ministry of Education, Science and Technology as Global Frontier Project ( CISS-2012M3A6A6054188 ). AR acknowledges the support of the Russell Berrie Nanotechnology Institute (RBNI).",

year = "2013",

doi = "10.1016/j.snb.2013.07.011",

language = "الإنجليزيّة",

volume = "188",

pages = "156--168",

journal = "Sensors and Actuators, B: Chemical",

issn = "0925-4005",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Selectivity enhancement of SnO2 nanofiber gas sensors by functionalization with Pt nanocatalysts and manipulation of the operation temperature

AU - Jang, Bong Hoon

AU - Landau, Osnat

AU - Choi, Seon Jin

AU - Shin, Jungwoo

AU - Rothschild, Avner

AU - Kim, Il Doo

N1 - Funding Information: This research was supported by a grant from the Ministry of Research, Korea and the Israeli Ministry of Science and Technology (Grant no. 3-8272 ). This work was also supported by the Center for Integrated Smart Sensors funded by the Ministry of Education, Science and Technology as Global Frontier Project ( CISS-2012M3A6A6054188 ). AR acknowledges the support of the Russell Berrie Nanotechnology Institute (RBNI).

PY - 2013

Y1 - 2013

N2 - We report on facile synthesis of SnO2 nanofibers (NFs) functionalized by Pt nanoparticles (NPs) with various loading contents (0.05-0.4 wt%) and their gas response toward H2, NO2, NH 3, CO, and SO2 gases as a function of the operation temperature (100-450 C) and gas concentration (0.125-2.5 ppm). Mesoporous SnO2 NFs with large surface-to-volume ratio, which facilitates sensitive gas response, were synthesized by electrospinning followed by subsequent calcination at 500 C for 2 h. Colloidal Pt NPs synthesized by simple polyol method were immobilized on SnO2 NFs as a catalytic sensitizer to H2 oxidation. The gas sensing properties and response kinetics were significantly affected by the Pt NPs and the operation temperature. It was found that 0.1 wt% Pt-loaded SnO2 sensor showed the highest H 2 response (Igas/Iair = 16.6 at 2.5 ppm) at 300 C. A remarkably high NO2 response (Iair/Igas = 57.0 at 2.5 ppm) was achieved in the case of pristine SnO2 sensor at 150 C. This work demonstrates that sensitive and selective detection of H 2 and NO2 gases with negligible cross-response to interfering gases such as NH3, CO, and SO2 can be obtained by decoration with Pt NPs on metal oxide NFs in conjunction with manipulation of the operation temperature.

AB - We report on facile synthesis of SnO2 nanofibers (NFs) functionalized by Pt nanoparticles (NPs) with various loading contents (0.05-0.4 wt%) and their gas response toward H2, NO2, NH 3, CO, and SO2 gases as a function of the operation temperature (100-450 C) and gas concentration (0.125-2.5 ppm). Mesoporous SnO2 NFs with large surface-to-volume ratio, which facilitates sensitive gas response, were synthesized by electrospinning followed by subsequent calcination at 500 C for 2 h. Colloidal Pt NPs synthesized by simple polyol method were immobilized on SnO2 NFs as a catalytic sensitizer to H2 oxidation. The gas sensing properties and response kinetics were significantly affected by the Pt NPs and the operation temperature. It was found that 0.1 wt% Pt-loaded SnO2 sensor showed the highest H 2 response (Igas/Iair = 16.6 at 2.5 ppm) at 300 C. A remarkably high NO2 response (Iair/Igas = 57.0 at 2.5 ppm) was achieved in the case of pristine SnO2 sensor at 150 C. This work demonstrates that sensitive and selective detection of H 2 and NO2 gases with negligible cross-response to interfering gases such as NH3, CO, and SO2 can be obtained by decoration with Pt NPs on metal oxide NFs in conjunction with manipulation of the operation temperature.

KW - Electrospinning

KW - Gas sensor

KW - Nanofibers

KW - Pt catalyst

KW - Tin oxide

UR - http://www.scopus.com/inward/record.url?scp=84881282859&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2013.07.011

DO - 10.1016/j.snb.2013.07.011

M3 - مقالة

SN - 0925-4005

VL - 188

SP - 156

EP - 168

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -