Enhanced triethylamine sensing properties by designing Au@SnO 2 /ZnO nanosheets directly on alumina tubes

Yu, Huanqin; Xu, Hongyan; Li, Wenru; Zhai, Ting; Chen, Zhengrun; Wang, Jieqiang; Cao, Bingqiang

doi:10.1016/j.surfin.2017.12.005

Cited by 30 publications

(9 citation statements)

References 46 publications

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“…In Figure 7a, the introduction of Au further increased the resistance (R a ) of the sensors, probably related to the Schottky contact of the Au−WO 2.72 interface and catalytic spillover effects of Au nanoparticles on adsorbed oxygen. 38,39 Furthermore, the optimal operating temperature (240 °C) of sensors based on Au/PdO/WO 2.72 is lower than those of PdO/ WO 2.72 (260 °C) and WO 2.72 (280 °C), demonstrating that Au loading reduces the optimal operating temperature of sensors, which may be related to the enhancement of the surface activation energy and decrease of the energy barrier height caused by adding Au nanoparticles. 15,40 The response of sensor based on 2%AuPW to 40 ppm of TMA is the highest among them.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

“…In addition, the mesoporous structure of the Au/PdO/WO 2.72 composite facilitates the diffusion and transportation of gas molecules, accelerating the gas-sensitive reaction of the sensor. ( 3 17,38,48 On one hand, in the Au/PdO/WO 2.72 hybrid structure, a p−n heterojunction is formed between p-type PdO and n-type WO 2.72 . The electrons transferred from WO 2.72 to PdO until the Fermi level reaches equilibrium.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The energy band diagram of Au/PdO/WO 2.72 is shown in Figure a,b. The work functions of PdO (Pd/PdO), WO 2.72 , and Au are 5.5, 4.8, and 5.1 eV, respectively. ,, On one hand, in the Au/PdO/WO 2.72 hybrid structure, a p–n heterojunction is formed between p-type PdO and n-type WO 2.72 . The electrons transferred from WO 2.72 to PdO until the Fermi level reaches equilibrium.…”

Section: Resultsmentioning

confidence: 99%

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Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Shang

Shi

Cui

et al. 2020

ACS Appl. Nano Mater.

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Urchin-like WO2.72 microspheres modified with Au and PdO nanoparticles were constructed and applied to the field of gas sensors. The gas-sensing test results showed that the Au/PdO/WO2.72 sensors exhibited excellent gas-sensitive performances. The sensors have not only an ultrahigh response to TMA but also a rapid response/recovery time. Especially WO2.72 decorated with 2 wt % Au and 2 wt % PdO nanoparticles (2%AuPW), its response to 40 ppm of TMA can be up to 802.5 at 240 °C, which is approximately 110.5 and 1.6 times of WO2.72 (7.26) and 2 wt % PdO/WO2.72 (496.6) at 260 °C, respectively. Even for 1 ppm of TMA, the response of the as-obtained 2%AuPW sensor can still attain 10.9. Furthermore, the Au/PdO/WO2.72 sensor showed excellent effectiveness after 30 days. The BET results indicate that the deposition of PdO and Au nanoparticles increases the specific surface area of the sample. The mechanism analysis revealed that the markedly increased gas-sensing properties of Au/PdO/WO2.72 sensors are ascribed to the synergy of surface area and a mesoporous structure, a p–n heterojunction, and a catalytic spillover effect of PdO and Au nanoparticles. The rational design and detailed investigation of Au/PdO/WO2.72 sensors provide insights into the development and design of other semiconductor-based sensors.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Shang

Shi

Cui

et al. 2020

ACS Appl. Nano Mater.

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“…[27a] The hybrid was achieved by growing ZnO nanosheets directly onto Al 2 O 3 ceramic tubes, and then depositing nickel oxide on the upper layer. Moreover, Au@SnO 2 / ZnO nanosheets, [67] Au-loaded ZnO/SnO 2 nanosheets, [52] and Au-loaded ZnO/SnO 2 core-shell nanorods [26] were also directly grown on Al 2 O 3 substrate. And all the corresponding TEA sensors displayed quite good sensing performance.…”

Section: Zno-based Sensorsmentioning

confidence: 99%

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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“… 13 Moreover, the terminating sulfide at the edges of MoS 2 could have maximum exposure in the case of thin-layered MoS 2 . 14 14 Most of the early studies used mechanical stripping or sputtering deposition to prepare molybdenum disulfide, and the resulting molybdenum disulfide was in the form of layers. 15 Later, chemical vapor deposition was used to prepare molybdenum disulfide films; 16 nanoflower molybdenum disulfide has also been prepared using a hydrothermal process.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MoS₂ Nanochains by Electrospinning for Ammonia Detection at Room Temperature

et al. 2022

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MoS 2 nanochains were successfully prepared via facile electrospinning and a hydrothermal process. The morphology of MoS 2 nanochains was evaluated by field emission scanning electron microscopy and high-resolution transmission electron microscopy. A slurry composed of the MoS 2 nanochains was coated on a silver electrode to detect ammonia. The detection range of ammonia was between 25 and 500 ppm. MoS 2 nanochains offered outstanding sensing response, repeatable reproducibility, and excellent selectivity with a detection limit of 720 ppb. The responsiveness of MoS 2 nanochains to ammonia remained unchanged for 1 week.

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Enhanced triethylamine sensing properties by designing Au@SnO 2 /ZnO nanosheets directly on alumina tubes

Cited by 30 publications

References 46 publications

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Semiconductor Gas Sensor for Triethylamine Detection

Synthesis of MoS₂ Nanochains by Electrospinning for Ammonia Detection at Room Temperature

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Enhanced triethylamine sensing properties by designing Au@SnO 2 /ZnO nanosheets directly on alumina tubes

Cited by 30 publications

References 46 publications

Urchin-Like WO2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Urchin-Like WO2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Semiconductor Gas Sensor for Triethylamine Detection

Synthesis of MoS2 Nanochains by Electrospinning for Ammonia Detection at Room Temperature

Contact Info

Product

Resources

About

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Urchin-Like WO_2.72 Microspheres Decorated with Au and PdO Nanoparticles for the Selective Detection of Trimethylamine

Synthesis of MoS₂ Nanochains by Electrospinning for Ammonia Detection at Room Temperature