Regulation of N-type In2O3 Content on the Conductivity Typeof Co3O4 Based Acetone Sensor

• Autorzy: Fu Lijuan , Fan Shuxing , Wang Zhao , Tang Wei

Identyfikatory

DOI

10.2478/msp-2023-0014

• Języki publikacji: EN

Abstrakty

EN

A double-jet electrospinning method was adopted to fabricate In₂O₃/Co₃O₄ nanofibers (NFs). The sensitivity of In₂O₃/Co₃O₄NFs and In₂O₃NFs were compared and analyzed, and the morphology, structure, chemical composition, and gas-sensing properties of the samples were comprehensively characterized. The results show that the introduction of Co₃O₄can improve the response of In₂O₃/Co₃O₄to acetone, to 29.52 (In₂O₃/Co₃O₄) and 12.34 (In₂O₃) to 200 ppm acetone at 2000°C, respectively. In addition, the doping of Co₃O₄was found to reduce the optimum working temperature of pure In₂O₃ from 275°C to 200°C. The composite of Co₃O₄and In₂O₃not only enhances the sensing performance, but also leads to a conversion of p-n conductivity type. The phenomenon of the p-n transition is relevant to operating temperature and proportion of In₂O₃and Co₃O₄. While the enhanced acetone sensing properties of In₂O₃/Co₃O₄NFs may be attributed to the p-n hetero-junction between n-type In₂O₃ and p-type Co₃O₄ crystalline grains, which promotes the electron migration. The synergistic effects between In₂O₃and Co₃O₄and the large specific surface area of NFs additionally contribute to the improvements of acetone sensing performance.

Słowa kluczowe

EN

electrospinning; In2O3/Co3O4; gas sensor; nanofibre; p-n transition

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2023
• Tom: Vol. 41, No. 1
• Strony: 202--213
• Opis fizyczny: Bibliogr. 37 poz., rys., tab.

Twórcy

autor

Fu Lijuan

• School of Physics and Electronic Science, Shandong Normal University, Jinan 250014, China

autor

Fan Shuxing

• School of Physics and Electronic Science, Shandong Normal University, Jinan 250014, China

autor

Wang Zhao

• School of Physics and Electronic Science, Shandong Normal University, Jinan 250014, China

autor

Tang Wei

• School of Physics and Electronic Science, Shandong Normal University, Jinan 250014, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).