Hierarchically structured LaFeO3 with hollow core and porous shell as efficient sensing material for ethanol detection

Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyltrimethylammonium bromide. Its structural, morphological, microstructural and textual characterizations were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy a...

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Published inSensors and actuators. B, Chemical Vol. 354; p. 131195
Main Authors Nga Phan, Thi To, My Dinh, Thi Tra, Duc Nguyen, Minh, Dan Li, Nhan Phan, Chi, Kien Pham, Trung, Tu Nguyen, Cong, Huyen Pham, Thanh
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.03.2022
Elsevier Science Ltd
Subjects
Ammonia
Cetyltrimethylammonium bromide
Electron microscopy
Ethanol
Ferrites
Gas sensor
Gas sensors
Gases
Hollow core
Lanthanum compounds
Liquefied petroleum gas
Microscopy
P-type behavior
Perovskite
Porous surface
Selectivity
Sensors
Perovskite
Gas sensor
P-type behavior
Ethanol
Porous surface
Hollow core
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Abstract Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyltrimethylammonium bromide. Its structural, morphological, microstructural and textual characterizations were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption analysis. The gas-sensing performance of LFO-HS sensor was studied towards different gases, including ammonia (NH3), ethanol (C2H5OH), acetone (CH3COCH3), and liquefied petroleum gas (LPG). The LFO-HS sensor exhibited p-type gas sensing behavior and enhanced sensing performance towards ethanol gas as compared with bulk LaFeO3 sensor. A rapid, high, and stable response was seen at 300 °C. Meanwhile, a linear response and low limit of detection (1 ppb) to ethanol was observed. After the investigation on sensitivity to different reducing gases, our results revealed that the LFO-HS sensor exhibited good selectivity to ethanol and suggested it being a promising sensor candidate for future practical use in trace ethanol detection. •Hollow core and porous shell LaFeO3 (LFO-HS) was synthesized by a surfactant-assisted hydrothermal method.•The enhancement of ethanol gas-sensing characteristic of LFO-HS relating to its structural and mophological properties.•Trace-level detection limit of ethanol (down to 1 ppb) of 6-lay LFO-HS gas sensor.•Gas sensing mechanism based on p-type semiconductor properties, generated from La vacancies.
AbstractList Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyltrimethylammonium bromide. Its structural, morphological, microstructural and textual characterizations were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption analysis. The gas-sensing performance of LFO-HS sensor was studied towards different gases, including ammonia (NH3), ethanol (C2H5OH), acetone (CH3COCH3), and liquefied petroleum gas (LPG). The LFO-HS sensor exhibited p-type gas sensing behavior and enhanced sensing performance towards ethanol gas as compared with bulk LaFeO3 sensor. A rapid, high, and stable response was seen at 300 °C. Meanwhile, a linear response and low limit of detection (1 ppb) to ethanol was observed. After the investigation on sensitivity to different reducing gases, our results revealed that the LFO-HS sensor exhibited good selectivity to ethanol and suggested it being a promising sensor candidate for future practical use in trace ethanol detection. •Hollow core and porous shell LaFeO3 (LFO-HS) was synthesized by a surfactant-assisted hydrothermal method.•The enhancement of ethanol gas-sensing characteristic of LFO-HS relating to its structural and mophological properties.•Trace-level detection limit of ethanol (down to 1 ppb) of 6-lay LFO-HS gas sensor.•Gas sensing mechanism based on p-type semiconductor properties, generated from La vacancies.
Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyltrimethylammonium bromide. Its structural, morphological, microstructural and textual characterizations were performed using X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption analysis. The gas-sensing performance of LFO-HS sensor was studied towards different gases, including ammonia (NH3), ethanol (C2H5OH), acetone (CH3COCH3), and liquefied petroleum gas (LPG). The LFO-HS sensor exhibited p-type gas sensing behavior and enhanced sensing performance towards ethanol gas as compared with bulk LaFeO3 sensor. A rapid, high, and stable response was seen at 300 °C. Meanwhile, a linear response and low limit of detection (1 ppb) to ethanol was observed. After the investigation on sensitivity to different reducing gases, our results revealed that the LFO-HS sensor exhibited good selectivity to ethanol and suggested it being a promising sensor candidate for future practical use in trace ethanol detection.
ArticleNumber 131195
Author Nga Phan, Thi To
Duc Nguyen, Minh
Kien Pham, Trung
Huyen Pham, Thanh
My Dinh, Thi Tra
Nhan Phan, Chi
Tu Nguyen, Cong
Dan Li
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  surname: Huyen Pham
  fullname: Huyen Pham, Thanh
  organization: Department of Organic and Petrochemical Technology, School of Chemical Engineering, Hanoi University of Science and Technology, Ha Noi, Viet Nam
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Keywords Perovskite
Gas sensor
P-type behavior
Ethanol
Porous surface
Hollow core
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Snippet Hollow LaFeO3 (LFO-HS) was synthesized by a facile hydrothermal method with the use of cetyltrimethylammonium bromide. Its structural, morphological,...
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StartPage 131195
SubjectTerms Ammonia
Cetyltrimethylammonium bromide
Electron microscopy
Ethanol
Ferrites
Gas sensor
Gas sensors
Gases
Hollow core
Lanthanum compounds
Liquefied petroleum gas
Microscopy
P-type behavior
Perovskite
Porous surface
Selectivity
Sensors
Title Hierarchically structured LaFeO3 with hollow core and porous shell as efficient sensing material for ethanol detection
URI https://dx.doi.org/10.1016/j.snb.2021.131195
https://www.proquest.com/docview/2637401148/abstract/
Volume 354
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