Characteristics of porous spherical LaFeO3 as ammonia gas sensing material

Porous spherical LaFeO3 (PS‐LFO) sample was prepared using a simple hydrothermal method and found to be a potential gas sensor for NH3 detection. Structural characteristic of the sample was examined by several techniques, including X‐ray diffraction (XRD), scanning electron microscopy (SEM), and tra...

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Bibliographic Details
Published in:Vietnam journal of chemistry 2021-10, Vol.59 (5), p.676-683
Main Authors: Nga, Phan Thi To, My, Dinh Thi Tra, Duc, Nguyen Minh, Kien, Pham Trung, Nhan, Phan Chi, Tu, Nguyen Cong, Huyen, Pham Thanh
Format: Article
Language:English
Subjects:
ammonia
gas sensor
LaFeO3
porous
p‐type behavior
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Summary:Porous spherical LaFeO3 (PS‐LFO) sample was prepared using a simple hydrothermal method and found to be a potential gas sensor for NH3 detection. Structural characteristic of the sample was examined by several techniques, including X‐ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). XRD investigation confirmed the formation of porous spherical LaFeO3 with a perovskite phase. TEM and SEM results revealed the porous structure of the material. The presence of functional groups was confirmed using Fourier transform infrared spectroscopy (FT‐IR). Orthorhombic porous spherical LaFeO3 calcined at 700 oC was employed as a gas sensor for detection of ammonia gas. The results revealed that PS‐LFO‐based sensor showed p‐type gas sensing behavior with good sensitivity, rapid response, and sub‐ppm detection limit to ammonia gas at 325 oC.
ISSN:0866-7144
2572-8288
DOI:10.1002/vjch.202100036