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- W2977677425 abstract "Resistive-based gas sensors have been considered as the most favorable gas sensors for detection of toxic gases and volatile organic compounds (VOCs) because of their simple structure, low cost, high sensitivity, ease of use, and high stability. Unfortunately, wide application of resistive-based gas sensors is limited by their low selectivity. In this article, we present the fabrication of ultrahigh selective NH3 gas sensor based on tin–titanium dioxide/reduced graphene/carbon nanotube (Sn–TiO2@rGO/CNT) nanocomposites. The Sn–TiO2@rGO/CNT nanocomposites with different molar ratios of Sn/Ti (1:10, 3:10, and 5:10) were synthesized via the solvothermal method. Characterizations by scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy confirmed the decoration of Sn–TiO2 nanoparticles on rGO/CNT nanocomposite surfaces. The Sn–TiO2@rGO/CNT nanocomposite gas sensor exhibited high response and ultrahigh selectivity to NH3 against toluene, dimethylformamide, acetone, ethanol, methanol, isopropanol, formaldehyde, hydrogen, carbon dioxide, acetylene, and VOCs in paint thinners at room temperature. The Sn–TiO2@rGO/CNT nanocomposite gas sensor with molar ratio of Sn/Ti = 1:10 showed the highest response to NH3 over other molar ratios of Sn/Ti as well as pure rGO/CNT and Sn–TiO2 gas sensors. The ammonia-sensing mechanisms of the Sn–TiO2@rGO/CNT gas sensor were proposed based on the formation of p–n heterojunctions of p-type rGO/CNT and n-type Sn–TiO2 nanoparticles via a low-temperature oxidizing reaction process." @default.
- W2977677425 created "2019-10-10" @default.
- W2977677425 creator A5028007272 @default.
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- W2977677425 creator A5072265744 @default.
- W2977677425 date "2019-10-03" @default.
- W2977677425 modified "2023-10-16" @default.
- W2977677425 title "Ultrahigh Selective Room-Temperature Ammonia Gas Sensor Based on Tin–Titanium Dioxide/reduced Graphene/Carbon Nanotube Nanocomposites by the Solvothermal Method" @default.
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- W2977677425 doi "https://doi.org/10.1021/acsomega.9b02185" @default.
- W2977677425 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6796937" @default.
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- W2977677425 hasPublicationYear "2019" @default.
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