Effects of Ag Additive in Low Temperature CO Detection with In₂O₃ Based Gas Sensorsстатья

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Scopus, Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 декабря 2018 г.

Работа с статьей


[1] Effects of ag additive in low temperature co detection with in₂o₃ based gas sensors / D. Naberezhnyi, M. Rumyantseva, D. Filatova et al. // NANOMATERIALS. — 2018. — Vol. 8, no. 10. — P. 801–1–801–15. Nanocomposites In₂O₃/Ag obtained by ultraviolet (UV) photoreduction and impregnation methods were studied as materials for CO sensors operating in the temperature range 25⁻250 oC. Nanocrystalline In₂O₃ and In₂O₃/Ag nanocomposites were characterized by X-ray diffraction (XRD), single-point Brunauer-Emmet-Teller (BET) method, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) with energy dispersive X-ray (EDX) mapping. The active surface sites were investigated using Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) spectroscopy and thermo-programmed reduction with hydrogen (TPR-H₂) method. Sensor measurements in the presence of 15 ppm CO demonstrated that UV treatment leads to a complete loss of In₂O₃ sensor sensitivity, while In₂O₃/Ag-UV nanocomposite synthesized by UV photoreduction demonstrates an increased sensor signal to CO at T < 200 oC. The observed high sensor response of the In₂O₃/Ag-UV nanocomposite at room temperature may be due to the realization of an additional mechanism of CO oxidation with participation of surface hydroxyl groups associated via hydrogen bonds. [ DOI ]

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