La[Fe(CN)6]·5H2O-derived LaFeO3 hexagonal nano-sheets as low-power n-propanol sensors

Li, Xu; Zhang, Guozheng; Liu, Ningning; Liang, Hongjian; Wang, Zi-Hao; Tan, Zhenquan; Song, Xue‐Zhi

doi:10.1007/s00339-022-05957-4

Cited by 8 publications

(3 citation statements)

References 48 publications

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“…The surface oxygen vacancies can not only decrease the adsorption energy but also offer active sites. Simultaneously, the role of adsorbed oxygen species is pivotal in reactions with the molecules of the target gas. − …”

Section: Resultsmentioning

confidence: 99%

“…This chromosome-like morphology formed by the accumulation of nanoparticles may expose sufficient active sites, which promotes the diffusion of n -propanol molecules and accelerates the gas adsorption–desorption process. , The plentiful oxygen vacancies and adsorbed oxygen species can significantly decrease the adsorption energy of gas molecules on the material’s surface and provide active sites for subsequent reactions. Concurrently, they carry out a pivotal role in reactions with the target gas molecules. − Additionally, the narrow-band gap facilitates electron transfer from the valence band to the conduction band to participate in the reaction, enhancing sensitivity to the target gas. ,− …”

Section: Resultsmentioning

confidence: 99%

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Narrow-Band HoFeO₃ Nanostructure-Based Gas Sensor for n-Propanol Detection

Liang,

Liu,

Lin

et al. 2024

ACS Appl. Nano Mater.

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The sensitive detection of n-propanol, a typical marker molecule in respiratory gases for lung cancer, has attracted much attention from the consideration of health in modern society. However, the identification of n-propanol at the sub-ppm level with rapid responsive ability is a significant challenge but very critical for the early diagnosis of lung cancer. Herein, we demonstrate a unique chromosome-like HoFeO 3 nanostructure material, prepared by annealing the self-sacrificial template of easily accessible HoFe-(CN) 6 , for high-performance n-propanol sensing. In detecting npropanol, the HoFeO 3 material-based sensor exhibits a response of 120.5 to 100 ppm of n-propanol at an operating temperature of 120 °C. Most importantly, it shows a low detection limit of 50 ppb and a good linear relationship between response and concentration. This sensor also possesses a rapid responsive ability with a response time of 4 s. The remarkable sensing performance, greatly outperforming other conventional semiconductor-based chemiresistive gas sensors, can be mainly attributed to the mesoporous structure, various surface element states, and narrow-band traits. The homemade experiment system further validates the practical potential of HoFeO 3 microchromosome-based gas sensors for early-stage lung cancer diagnosis.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Narrow-Band HoFeO₃ Nanostructure-Based Gas Sensor for n-Propanol Detection

Liang,

Liu,

Lin

et al. 2024

ACS Appl. Nano Mater.

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“…A variety of compositions have been used in the gas-sensing field. For example, LaFeO 3 , as a widely studied ABO 3 material in the field of gas sensors, has excellent gas sensitivity to ethanol, n-propanol, n-butanol, CO, and formaldehyde gases [5][6][7][8][9][10]. Sheng et al synthesized NdFeO 3 nano-coral particles by a solvothermal method and a calcination treatment, and the prepared NdFeO 3 -based sensor showed good gas-sensing performance to ethanol [11].…”

Section: Introductionmentioning

confidence: 99%

Gas-Sensing Performance of Gadolinium Ferrates with Rod and Butterfly Morphologies

et al. 2023

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There is an urgent need to develop a low-cost and high-performance gas sensor for industrial production and daily life. Perovskite-type oxides are appropriate materials for resistive gas sensors. In this paper, two gas-sensing materials of gadolinium orthoferrite (GdFeO3) with rod and butterfly morphologies were obtained by annealing the corresponding precursors at 800 °C in a muffle furnace for 3 h. The precursors of GdFe(CN)6·4H2O with novel morphologies were prepared by a co-precipitation method at room temperature. The materials were evaluated in terms of their structure, morphology, and gas-sensing performance. The gas sensor based on GdFeO3 rods showed a better sensing performance than the sensor based on GdFeO3 butterflies. It exhibited the largest response value of 58.113 to 100 ppm n-propanol at a relatively low operating temperature of 140 °C, and the detection limit was 1 ppm. The results show that the GdFeO3 rods-based sensor performed well in detecting low concentration n-propanol. The satisfactory gas-sensing performance of the GdFeO3 rods-based sensor may be due to the porous structure and the large percentages of defect oxygen and adsorbed oxygen (37.5% and 14.6%) on the surface. This study broadens the application of GdFeO3 in the gas sensor area.

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