SnO2/ZnSnO3 double-shelled hollow microspheres based high-performance acetone gas sensor

Cheng, Pengfei; Lv, Li; Wang, Yinglin; Bao, Zhenan; Zhang, Yue; Zhang, Yaoqiong; Lei, Zhaohui; Xu, Luping

doi:10.1016/j.snb.2020.129212

Cited by 86 publications

(24 citation statements)

References 62 publications

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“…Metal oxide semiconductor (MOS) gas sensors have been used extensively to monitor various volatile organic compounds (VOCs) due to their low cost, ease of use, scalability, and high sensitivity. − Approaches to improve their sensing performance were developed including doping, heterojunction, noble metal modification, and so on. − Up to now, the research of MOS gas sensors has been booming. Unfortunately, the intrinsic cross-sensing property of MOS gas sensors has not been adequately addressed, despite the significant enhancement of their selectivity and sensitivity. , Therefore, it remains a challenge for the recognition and quantified analysis of a detected gas for a single MOS gas sensor in the real environment.…”

Section: Introductionmentioning

confidence: 99%

SnO₂ Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

Miao

Chen

Wang

et al. 2022

ACS Appl. Nano Mater.

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Dynamic working temperature modulation has received considerable attention as a way to enable metal oxide-based gas sensors to recognize the detected gases. Previous reports mainly focused on heating-voltage waveform manipulation and algorithm improvement, not involving the insight of the temperature modulation sensing behavior correlated with fine nanostructures of metal oxide. Here, three types of SnO2 nanoparticles with different percentages of high-energy {221} and low-energy {110} crystal facets were synthesized and assembled as gas sensors. Under a working temperature modulation by applying a square wave pulse heating voltage, their dynamic response behaviors toward volatile organic compounds (VOCs) including alcohols, aldehydes, ketones, amines, and aromatic compounds were systematically explored. The results indicated that they exhibited different characteristic response curves toward different VOCs, presenting the crystal facet-dependent temperature modulation sensing behaviors. This effect was analyzed further and explored in conjunction with the characteristic response curves. Based on their different characteristic response curves that occurred on the three types of SnO2 nanoparticles, the detected gases, and even some congeners, were well discriminated along with a simple PCA recognition algorithm. Additionally, their quantitative analysis was also achieved.

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Section: Introductionmentioning

confidence: 99%

SnO₂ Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

Miao

Chen

Wang

et al. 2022

ACS Appl. Nano Mater.

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“…Based on the sensing mechanism model [ 8 ], there are three reasonably effective strategies for increasing the sensitivity and selectivity of SnO 2 : nanostructure modification, heterojunction structure building, and noble metal elements doping. For instance, a slew of remarkable research works is devoted to synthesizing SnO 2 with various nano-morphologies, such as nanowires [ 9 ], nanoflower [ 10 , 11 ], nanofibers [ 12 ], nano hollow [ 13 ], 2D flakes [ 14 ], nanosphere [ 15 , 16 ], 3D mesoporous [ 17 ], hollow sphere [ 18 ], and 3D microporous spheres [ 19 , 20 ]. However, it is extremely hard to find out the mechanisms of how the morphologies changing affects the sensing properties, and the nanostructures of the materials seem extremely difficult to be designed and predicted.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Sensing Performance of Highly Doped Sb/SnO2

Feng

Gaiardo

Valt

et al. 2022

Sensors

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Tin dioxide (SnO2) is the most-used semiconductor for gas sensing applications. However, lack of selectivity and humidity influence limit its potential usage. Antimony (Sb) doped SnO2 showed unique electrical and chemical properties, since the introduction of Sb ions leads to the creation of a new shallow band level and of oxygen vacancies acting as donors in SnO2. Although low-doped SnO2:Sb demonstrated an improvement of the sensing performance compared to pure SnO2, there is a lack of investigation on this material. To fill this gap, we focused this work on the study of gas sensing properties of highly doped SnO2:Sb. Morphology, crystal structure and elemental composition were characterized, highlighting that Sb doping hinders SnO2 grain growth and decreases crystallinity slightly, while lattice parameters expand after the introduction of Sb ions into the SnO2 crystal. XRF and EDS confirmed the high purity of the SnO2:Sb powders, and XPS highlighted a higher Sb concentration compared to XRF and EDS results, due to a partial Sb segregation on superficial layers of Sb/SnO2. Then, the samples were exposed to different gases, highlighting a high selectivity to NO2 with a good sensitivity and a limited influence of humidity. Lastly, an interpretation of the sensing mechanism vs. NO2 was proposed.

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“…To further improve the gas-sensitive performance of ZnSnO 3 , Yu et al [16] compounded ZnSnO 3 with CuO and found a sensing response to ethanol of up to 131. Zhang et al [17] and Cheng et al [18] reported that ZnSnO 3 was compounded with SnO 2 ; due to the excellent physical and chemical properties of both SnO 2 and ZnSnO 3 , the gas-sensitive properties of the SnO 2 /ZnSnO 3 composite were significantly improved compared to both SnO 2 and ZnSnO 3 materials. The cubic ZnSnO 3 /ZnO heterostructure showed a much improved response to 50 ppm triethylamine compared to pure ZnSnO 3 (R a /R g = 21) [15].…”

Section: Introductionmentioning

confidence: 99%

Electrospun ZnSnO3/ZnO Composite Nanofibers and Its Ethanol-Sensitive Properties

Dong

Jin

Wei

et al. 2022

Metals

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In this work, a novel heterojunction based on ZnSnO3/ZnO nanofibers was prepared by a simple electrospinning method. The crystal, structural, and surface compositional properties of ZnSnO3 and ZnSnO3/ZnO composite nanofibers were investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectrometer (XPS), and Brunauer–Emmett–Teller (BET). Compared to pure ZnSnO3 nanofibers, the ZnSnO3/ZnO heterostructure nanofibers had high sensitivity and selectivity response with the fast response toward ethanol gas at low operational temperature. The sensing response of the sensor based on ZnSnO3/ZnO composite nanofibers was 19.6 toward 50 ppm ethanol gas at 225 °C, which was about 1.5 times superior to that of pure ZnSnO3 nanofibers. It can be owed mainly to the oxygen vacancies and the synergistic effect between ZnSnO3 and ZnO.

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SnO2/ZnSnO3 double-shelled hollow microspheres based high-performance acetone gas sensor

Cited by 86 publications

References 62 publications

SnO₂ Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

SnO₂ Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

Investigation on Sensing Performance of Highly Doped Sb/SnO2

Electrospun ZnSnO3/ZnO Composite Nanofibers and Its Ethanol-Sensitive Properties

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SnO2/ZnSnO3 double-shelled hollow microspheres based high-performance acetone gas sensor

Cited by 86 publications

References 62 publications

SnO2 Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

SnO2 Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

Investigation on Sensing Performance of Highly Doped Sb/SnO2

Electrospun ZnSnO3/ZnO Composite Nanofibers and Its Ethanol-Sensitive Properties

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SnO₂ Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds

SnO₂ Nanostructures Exposed with Various Crystal Facets for Temperature-Modulated Sensing of Volatile Organic Compounds