Formaldehyde-sensing properties of LaFeO3 particles synthesized by citrate sol–gel method

Zhang, Yong; Jiang, Bin; Yuan, Mengwei; Li, Peiwen; Li, Wei; Zheng, Xuejun

doi:10.1007/s10971-016-4025-0

Cited by 42 publications

(9 citation statements)

References 52 publications

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“…In recent years, indoor air pollution has aroused high attention due to its huge damage to people's health, such as headache , fatigue , sick building syndrome , and even cancer . Metal oxide semiconductor (MOX) gas sensor is believed to be one of the most feasible detection methods because of its real‐time detection and low cost .…”

Section: Introductionmentioning

confidence: 99%

Facet‐dependent gas sensing properties of Cu₂O crystals

Xie

Han

et al. 2017

Physica Status Solidi (a)

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Well-defined polyhedral Cu 2 O exposing different crystal facets are synthesized via a facile solution-phase method, and the facet-dependent gas sensing properties are investigated. The results show that cubic Cu 2 O exposing (100) facets has higher sensitivity to NO 2 , acetone and benzene than octahedral Cu 2 O with (111) facets. More importantly, the cubic Cu 2 O has high selectivity to NO 2 and acetone at varied working temperatures by different sensing mechanisms of adsorption, chemical reaction, and intrinsic carrier excitation, as verified by the catalytic and electric property measurements. The higher sensitivity and selectivity of cubic Cu 2 O is explained by the relatively lower work function of (100) surfaces than that of (111), which induces a thicker surface hole accumulation layer and thus, a higher bulk hole activation energy (0.55 eV and 0.36 eV respectively). The synergistic effect of catalytic and electric properties gives rise to gas sensitivity decrease with the reduced percentage of (111) facets, which is beneficial to the gas sensing material design and also, is promising for the future highly sensitive and selective gas sensor fabrication.

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Section: Introductionmentioning

confidence: 99%

Facet‐dependent gas sensing properties of Cu₂O crystals

Xie

Han

et al. 2017

Physica Status Solidi (a)

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“…As shown in Figure b, the O 1s spectrum of the 10%CeO 2 /β-SiC catalyst could be divided into two peaks. The lower binding energy peak at 529.9 eV was related to the lattice oxygen (O lat 2– , marked as O α ), while the higher binding energy peak at 533.2 eV was assignable to the surface-adsorbed oxygen (O 2ads 2– , O ads – , or O 2ads – , labeled as O β ) that physically or chemically absorbed on the oxygen vacancies. , For the pure CeO 2 catalyst, two peaks located at 529.4 and 531.6 eV were observed, which were relevant to the O α and O β species, respectively. It demonstrated the coexistence of the surface-adsorbed oxygen and lattice oxygen within the 10%CeO 2 /β-SiC and CeO 2 catalysts.…”

Section: Results and Discussionmentioning

confidence: 99%

High-Temperature Selective Oxidation of H₂S to Elemental Sulfur on a β-SiC-Supported Cerium Catalyst

Wei

et al. 2021

Ind. Eng. Chem. Res.

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H2S-selective catalytic oxidation at high temperatures is a cost-effective way to directly treat lean acid gas. Herein, cerium supported on a β-SiC catalyst was synthesized by a simple impregnation method, and the catalytic behavior for the H2S-selective oxidation reaction was evaluated at a relatively high-temperature range (300–550 °C). The 10%CeO2/β-SiC catalyst exhibited excellent H2S conversion (93%) and outstanding sulfur selectivity (94%) at 300 °C and could maintain it at 82 and 87%, respectively, even at temperatures up to 550 °C. Remarkably, the catalyst revealed prominent reaction stability, which could proceed consecutively at 550 °C for 30 h and could also run circularly from 300 to 550 °C three times without notable deactivation. This demonstrated that the β-SiC support allowed good dispersion of CeO2 particles, which further improved the reducibility of the 10%CeO2/β-SiC catalyst. Furthermore, the abundant oxygen vacancies on the catalyst surface facilitated O2 activation by providing a large amount of surface adsorbed oxygen and by improving the lattice oxygen mobility. Particularly, the high thermal stability of the β-SiC support displayed a significant role in high-temperature reactions, and the strong Ce–O–Si interaction between the β-SiC support and the CeO2 phase allowed the catalyst a good resistance to SO2 poisoning. This work provides a prospective way for the treatment of lean acid gas.

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“…9,10 Among the above-discussed detection gases, HCHO is one of the most common harmful gases among volatile organic compounds that appear in indoor pollutants and the food industry; it causes multifarious diseases and was classied as a human carcinogen by the World Health Organization (WHO) in 2017. 21,22 Furthermore, due to the different HCHO content levels in the exhaled breath of healthy humans (48 ppb) and lung cancer patients (83 ppb), HCHO has been proposed to be a biomarker for lung cancer detection. 8,23,24 Therefore, the detection of HCHO is necessary, and its great signicance has aroused wide interest.…”

Section: Introductionmentioning

confidence: 99%

A highly sensitive gas sensor employing biomorphic SnO₂with multi-level tubes/pores structure: bio-templated from waste of flax

et al. 2019

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Formaldehyde-sensing properties of LaFeO3 particles synthesized by citrate sol–gel method

Cited by 42 publications

References 52 publications

Facet‐dependent gas sensing properties of Cu₂O crystals

Facet‐dependent gas sensing properties of Cu₂O crystals

High-Temperature Selective Oxidation of H₂S to Elemental Sulfur on a β-SiC-Supported Cerium Catalyst

A highly sensitive gas sensor employing biomorphic SnO₂with multi-level tubes/pores structure: bio-templated from waste of flax

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Formaldehyde-sensing properties of LaFeO3 particles synthesized by citrate sol–gel method

Cited by 42 publications

References 52 publications

Facet‐dependent gas sensing properties of Cu2O crystals

Facet‐dependent gas sensing properties of Cu2O crystals

High-Temperature Selective Oxidation of H2S to Elemental Sulfur on a β-SiC-Supported Cerium Catalyst

A highly sensitive gas sensor employing biomorphic SnO2with multi-level tubes/pores structure: bio-templated from waste of flax

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Product

Resources

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Facet‐dependent gas sensing properties of Cu₂O crystals

Facet‐dependent gas sensing properties of Cu₂O crystals

High-Temperature Selective Oxidation of H₂S to Elemental Sulfur on a β-SiC-Supported Cerium Catalyst

A highly sensitive gas sensor employing biomorphic SnO₂with multi-level tubes/pores structure: bio-templated from waste of flax