Platinum-Supported Cerium-Doped Indium Oxide for Highly Sensitive Triethylamine Gas Sensing with Good Antihumidity

Zhou, Shiqiang; Lu, Qianqian; Chen, Mingpeng; Li, Bo; Wei, Hongping; Zi, Baoye; Zeng, Jiyang; Zhang, Yumin; Zhang, Jin; Zhu, Zhongqi; Liu, Qingju

doi:10.1021/acsami.0c12363

Cited by 105 publications

(40 citation statements)

References 42 publications

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“…Liu and co-workers developed a simple and low-cost sensor based on the Pt-and Ce-modified In 2 O 3 hollow structure. [56] The results of sensing tests uncovered that the sensor based on 1% Pt/Ce 12 In exhibited superior response, humidity resistance, reduced operating temperature, and long-term stability. The enhancement of sensing performance to TEA can be attributed to the high ratios of O V and O C , catalytic and spillover effect of Pt, and large specific surface area.…”

Section: 3 and 4 H Respectively) (Figurementioning

confidence: 98%

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Semiconductor Gas Sensor for Triethylamine Detection

Liu

Zhang

Fan

et al. 2021

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on the body for a long time, the genetic material will be damaged and mutations occur, which will result in abnormalities in the offspring. [4] Thus, it is urgent to develop devices to monitor these toxic gases. [5] The current devices for analyzing gas state pollutants are thin-layer chromatography scanner, [6] flame ionization detector, [7] gas chromatography-mass spectrometer (GC-MS), [8] and high-performance liquid chromatograph. [9] They can accurately detect and analyze these harmful gases, but they are bulky, expensive, laborious, and time-consuming. In addition, they cannot achieve real-time detection, so they cannot be widely used. By contrast, gas sensors have the advantages of portability, low expense, real-time monitoring and high sensitivity. According to different sensing principles, gas sensors can be divided into resistance-based, [10] optical, [11] micro-cantilever, [12] surface plasmon resonance, [13] surface acoustic, [14] and microwave sensors. [15] Among them, the resistance-based gas sensors have become a research hotspot due to their high sensitivity, good repeatability, and excellent selectivity. [16] Based on our survey, the history of resistance-based gas sensors dates back to several decades ago. Approximately 60 years ago, Brattain and Heiland discovered that the resistances of semiconductor materials vary according to the atmosphere. [17] Soon, Seiyama et al. applied this feature to detect harmful gases. [18] Then the first resistancebased gas sensor was successfully designed and patented by Taguchi. [17] The boiling point of triethylamine (TEA) is 89.5 °C at the normal temperature and pressure. Since its molecular formula contains hydrogen and carbon atoms, it is classified as a volatile organic compound (VOC). [19] Hitherto, TEA has been widely applied in many areas, such as, agriculture, fishery, and aviation, as well as, medication and health. [20] For example, it can be used as preservatives, surfactants, organic solvents, catalysts, etc. Moreover, studies have shown that putrid fish and shellfish releases TEA. In this regard, TEA can be used as a criterion to access the freshness of marine fish. [21] However, TEA harms the human body, mainly as a strong irritation to the skin and mucous membranes as well as the central nervous system. After prolonged exposure to TEA, some people are infected with emphysema and even die directly. According to the recommendations of the National Institute for Occupational Safety and Health Administration (NIOSH), the concentration of indoor TEA should be lower than 10 ppm. [22] The structure, application and hazards of TEA are schematic illustrated in Figure 1.Resistance-based gas sensors are effective in monitoring TEA. Currently, these resistance-based sensors are mainly With the demanding detection of unique toxic gas, semiconductor gas sensors have attracted tremendous attention due to their intriguing features, such as, high sensitivity, online detection, portability, ease of use, and low cost. Triethylamine, a typical gas of volatile organic...

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Section: 3 and 4 H Respectively) (Figurementioning

confidence: 98%

“…Coincidentally, the abundant oxygen vacancies in Ptand Ce-modified In 2 O 3 hollow structures, synthesized by Liu and coworkers, were also confirmed by EPR. [56]…”

Section: Electron Paramagnetic Resonancementioning

confidence: 99%

Semiconductor Gas Sensor for Triethylamine Detection

Liu

Zhang

Fan

et al. 2021

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“…Rare earth elements have turned out to play an important role in micro-nano structure regulation and chemical sensitization of SMO-based sensing materials, and most of their oxides possess unique physicochemical properties, including strong surface basicity, high catalytic activity, fast oxygen ion mobility, and high humidity tolerance. , In addition, elements with variable valence states are favorable to achieve an optimized sensing performance. Among all lanthanide elements, three elements (praseodymium (Pr), cerium (Ce), and terbium (Tb)) have typical trivalent/tetravalent states. , Cerium atoms possess a special 4f electronic shell, and the corresponding cerium oxide has rich oxygen vacancies, excellent oxygen storage capability, and quick transition between Ce 3+ and Ce 4+ to increase vacancies. − Therefore, doping multivalent Ce ions in the matrix of transition-metal oxides is promising for the improvement of gas sensing performance, especially for responsiveness and humidity resistance.…”

Section: Introductionmentioning

confidence: 99%

Engineering Pore Walls of Mesoporous Tungsten Oxides via Ce Doping for the Development of High-Performance Smart Gas Sensors

et al. 2022

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Chemiresistive gas sensors are widely used in environmental monitoring and industry production; however, their selectivity and sensitivity are yet to be improved and their working temperature is usually too high (around 250 °C), which limit their applications in detecting trace gases at low temperatures due to the low activity of sensitive layers. Herein, novel Ce-doped mesoporous WO3 with high specific surface areas of 59–72 m2/g, a stable crystalline framework, and finely tailored pore walls was synthesized via a facile in situ cooperative assembly method combined with a carbon-supported crystallization strategy. The doping of Ce atoms in the mesoporous WO3 pore wall can effectively adjust the coordination environment of W atoms, giving rise to dramatically enhanced oxygen vacancy (Ov) and forming Wδ+-Ov sites. As a result, the obtained Ce-doped mesoporous WO3 showed excellent H2S sensing performance at a low working temperature (150 °C) with an ultrahigh response value (381 vs 50 ppm), fast response dynamics (6 s), outstanding selectivity, and antihumidity property as well as good long-term stability. The superior gas sensing performance is attributed to the increased Ov density and enhanced conversion of surface-adsorbed H2S into SO x and SO x 2– during the surface adsorption-catalysis reaction in the sensitive layer. Density functional theory (DFT) calculations reveal that Ce4+ is embedded into the crystal lattice of WO3 to form an optimal structure rather than atom substitution, and Ce-doped WO3 shows a higher H2S adsorption energy and a larger charge transfer than that in pure WO3, accounting for the better H2S sensing response of Ce4+-doped WO3. Furthermore, a novel gas sensing module and smart portable sensor device based on Ce-doped mesoporous WO3 was developed for efficient real-time monitoring of H2S concentration on a smartphone via Bluetooth communication.

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“…For example, the traditional semiconductors of MoO 3 [13], In 2 O 3 [14], TiO 2 [15] and ZnO [16], owing to their useful features such as exotic electronic structure, well chemical stability, non-toxicity, rich optoelectronic properties, low cost, high surface-to volume ratio and considerable sensitivity at low temperatures, have been regarded as the attractive materials for the quantum dots sensitized solar cells, lighting emitting components, high frequency devices, and catalysts [17][18][19][20]. On the other hand, the above physicochemical characteristics strongly depend on their shape and size, as well as morphology and crystallinity [21,22].…”

Section: Introductionmentioning

confidence: 99%

MoO3 structures transition from nanoflowers to nanorods and their sensing performances

Huang

Zhang

et al. 2021

J Mater Sci: Mater Electron

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Morphology transformation and crystal growth strategies of metal oxide semiconductors are extensive studied in material science recently, because the morphology and crystallinity of the nanomaterial have signi cant effect on the physicochemical characteristics. However, understanding the morphology changes of α-MoO 3 induced by annealing temperature is still a challenge. Herein, the nanostructure transition of MoO 3 induced by calcined temperature has been investigated through XRD and SEM method. It can be found that crystallization is highly dependent on the annealing temperature. In addition, the MoO 3 nano owers can change into nanosheets at 500 ºC. Afterwards, the nanosheets turn into microrods, especially at 900 ºC due to the growth of MoO 3 crystal. On the other hand, MoO 3 is a traditional sensing material, which is sensitive to many volatile organic compounds. Thus, the sensing performances of various MoO 3 nanostructures were measured. Compared with MoO 3 nano owers and microrods. The MoO 3 nanosheets based sensor has excellent sensing performance towards ethanol, and the maximum gas response value is 8.06.

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Platinum-Supported Cerium-Doped Indium Oxide for Highly Sensitive Triethylamine Gas Sensing with Good Antihumidity

Cited by 105 publications

References 42 publications

Semiconductor Gas Sensor for Triethylamine Detection

Semiconductor Gas Sensor for Triethylamine Detection

Engineering Pore Walls of Mesoporous Tungsten Oxides via Ce Doping for the Development of High-Performance Smart Gas Sensors

MoO3 structures transition from nanoflowers to nanorods and their sensing performances

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