Highly Sensitive and Selective PbTiO                         3                          Gas Sensors with Negligible Humidity Interference in Ambient Atmosphere

Xing Hua Ma; Hua Yao Li; Sang Hyo Kweon; Seong Yong Jeong; Jong Heun Lee; Sahn Nahm

doi:10.1021/acsami.8b18428

Highly Sensitive and Selective PbTiO ₃ Gas Sensors with Negligible Humidity Interference in Ambient Atmosphere

Xing Hua Ma, Hua Yao Li, Sang Hyo Kweon, Seong Yong Jeong, Jong Heun Lee, Sahn Nahm

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

51 Citations (Scopus)

Abstract

Three PbTiO ₃ nanostructures were synthesized using a one-step hydrothermal reaction with different TiO ₂ powders as Ti sources, and their gas-sensing properties were investigated. The sensor comprising PbTiO ₃ nanoplates (NPs) exhibited a high response (resistance ratio = 80.4) to 5 ppm ethanol at 300 °C and could detect trace concentrations of ethanol down to 100 ppb. Moreover, the sensor showed high ethanol selectivity and nearly the same sensing characteristics despite the wide range of humidity variation from 20 to 80% RH. The mechanism for humidity-independent gas sensing was elucidated using diffuse reflectance infrared Fourier transform spectra. PbTiO ₃ NPs are new and promising sensing materials that can be used for detecting ethanol in a highly sensitive and selective manner with negligible interference from ambient humidity.

Original language	English
Pages (from-to)	5240-5246
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	11
Issue number	5
DOIs	https://doi.org/10.1021/acsami.8b18428
Publication status	Published - 2019 Feb 6

Bibliographical note

Funding Information:
This research was supported by the National Research Council of Science & Technology (NST) Grant by the Korean government (MSIP) (no. CAP-17-04-KRISS) and by a grant from the National Research Foundation of Korea (NRF), which was funded by the Korean government (Ministry of Education, Science, and Technology (MEST), grant no. 2016R1A2A1A05005331). Furthermore, the authors also thank the KU-KIST Graduate School Program of Korea University.

Publisher Copyright:
© 2019 American Chemical Society.

Keywords

PbTiO nanoplate
ethanol
gas sensor
humidity interference
selectivity

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/acsami.8b18428

Cite this

Ma, X. H., Li, H. Y., Kweon, S. H., Jeong, S. Y., Lee, J. H., & Nahm, S. (2019). Highly Sensitive and Selective PbTiO ₃ Gas Sensors with Negligible Humidity Interference in Ambient Atmosphere ACS Applied Materials and Interfaces, 11(5), 5240-5246. https://doi.org/10.1021/acsami.8b18428

Highly Sensitive and Selective PbTiO ₃ Gas Sensors with Negligible Humidity Interference in Ambient Atmosphere . / Ma, Xing Hua; Li, Hua Yao; Kweon, Sang Hyo et al.
In: ACS Applied Materials and Interfaces, Vol. 11, No. 5, 06.02.2019, p. 5240-5246.

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

Ma, XH, Li, HY, Kweon, SH, Jeong, SY, Lee, JH & Nahm, S 2019, ' Highly Sensitive and Selective PbTiO ₃ Gas Sensors with Negligible Humidity Interference in Ambient Atmosphere ', ACS Applied Materials and Interfaces, vol. 11, no. 5, pp. 5240-5246. https://doi.org/10.1021/acsami.8b18428

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abstract = " Three PbTiO 3 nanostructures were synthesized using a one-step hydrothermal reaction with different TiO 2 powders as Ti sources, and their gas-sensing properties were investigated. The sensor comprising PbTiO 3 nanoplates (NPs) exhibited a high response (resistance ratio = 80.4) to 5 ppm ethanol at 300 °C and could detect trace concentrations of ethanol down to 100 ppb. Moreover, the sensor showed high ethanol selectivity and nearly the same sensing characteristics despite the wide range of humidity variation from 20 to 80% RH. The mechanism for humidity-independent gas sensing was elucidated using diffuse reflectance infrared Fourier transform spectra. PbTiO 3 NPs are new and promising sensing materials that can be used for detecting ethanol in a highly sensitive and selective manner with negligible interference from ambient humidity. ",

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