Sr-doped α-Fe2O3 3D layered microflowers have high sensitivity and fast response to ethanol gas at low temperature

Zhang, Jianxia; Liu, Li; Sun, Chao; Li, Xiaosong; Zhao, Bing; Ju, Xiangnan; Tian, Chunxia; Sun, Dongbai; Nian, Guijun

doi:10.1016/j.cplett.2020.137495

Cited by 6 publications

(2 citation statements)

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“…In addition, ethanol vapor is one of the causes of fires . Therefore, detecting ethanol molecules at very low concentrations in an environment is of importance . In the field of detecting ethanol, resistive gas sensors constructed using metal oxides, such as TiO 2 , WO 3 , Fe 2 O 3 , and Zn 2 SnO 4 , are generally employed.…”

Section: Introductionmentioning

confidence: 99%

“…2 Therefore, detecting ethanol molecules at very low concentrations in an environment is of importance. 3 In the field of detecting ethanol, resistive gas sensors constructed using metal oxides, such as TiO 2 , 4 WO 3 , 5 Fe 2 O 3 , 6 and Zn 2 SnO 4 , 7 are generally employed. In particular, TiO 2 not only has the characteristic of good electrical properties and low price but also has good sensing stability.…”

Section: Introductionmentioning

confidence: 99%

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Nanoporous Co₃O₄–TiO₂ Heterojunction Nanosheets for Ethanol Sensing

Zhang

Liang

et al. 2022

ACS Appl. Nano Mater.

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Construction of suitable heterojunction oxide nanocomposites with affluent porosities and distinctive microstructures is a primary approach for acquiring high-performance sensing materials for specific gases. In this work, certain Co3O4–TiO2 porous heterojunction nanosheets derived from bimetal–organic frameworks (BMOFs) were constructed by calcining MIL-125 and ZIF-67 precursors with the goal of sensing ethanol. Sensing results showed that BMOF-derived Co3O4–TiO2 porous nanosheets exhibited much better ethanol-sensing performances than metal–organic framework (MOF)-derived TiO2 nanotablets. The molar ratio of Co3O4 to TiO2 was modulated to optimize the sensing performances of the Co3O4–TiO2 nanosheets. Under the conditions of 250 °C and 50 ppm ethanol, the heterojunction nanosheets with an optimal molar ratio of 12 mol % displayed the highest response value of 41.72, which was 20.76 times higher than the response of pure TiO2 nanotablets (2.01). Moreover, the selectivity coefficient (85.29%) of 12 mol % Co3O4–TiO2 nanosheets was about 3.06 times as large as that of pure TiO2 nanotablets (27.91%). The enhanced sensing performances toward ethanol were mainly due to the formed p–n heterojunctions and the porous nanosheet nanostructures with a high specific surface area.

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