Enhanced isopropanol sensing performance of the CdS nanoparticle decorated ZnO porous nanosheets based gas sensors

2021 ◽  
pp. 1-1
Author(s):  
Huan Zhang ◽  
Zhen Jin ◽  
Min-Da Xu ◽  
Yong Zhang ◽  
Jian Huang ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Porous Nanosheets ◽  
Cds Nanoparticle ◽  
Sensing Performance

scholarly journals Acetone Sensing and Catalytic Conversion by Pd-Loaded SnO2

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5921
Author(s):  
Pascal M. Gschwend ◽  
Florian M. Schenk ◽  
Alexander Gogos ◽  
Sotiris E. Pratsinis
Keyword(s):  
Gas Sensors ◽  
Tin Oxide ◽  
Operating Temperature ◽  
Packed Bed ◽  
Sensor Performance ◽  
Response Recovery ◽  
Recovery Times ◽  
Metal Additives ◽  
Metal Oxide Gas Sensors ◽  
Sensing Performance

Noble metal additives are widely used to improve the performance of metal oxide gas sensors, most prominently with palladium on tin oxide. Here, we photodeposit different quantities of Pd (0–3 mol%) onto nanostructured SnO2 and determine their effect on sensing acetone, a critical tracer of lipolysis by breath analysis. We focus on understanding the effect of operating temperature on acetone sensing performance (sensitivity and response/recovery times) and its relationship to catalytic oxidation of acetone through a packed bed of such Pd-loaded SnO2. The addition of Pd can either boost or deteriorate the sensing performance, depending on its loading and operating temperature. The sensor performance is optimal at Pd loadings of less than 0.2 mol% and operating temperatures of 200–262.5 °C, where acetone conversion is around 50%.

Low-temperature formaldehyde gas sensors based on NiO-SnO2 heterojunction microflowers assembled by thin porous nanosheets

2018 ◽  
Vol 273 ◽  
pp. 418-428 ◽  
Author(s):  
Dan Meng ◽  
Dongyu Liu ◽  
Guosheng Wang ◽  
Yanbai Shen ◽  
Xiaoguang San ◽  
...  
Keyword(s):  
Low Temperature ◽  
Gas Sensors ◽  
Porous Nanosheets

CO Sensing Performance of Porous Thick Film Nasicon-Based Solid Electrolyte Gas Sensors

2021 ◽  
Vol MA2021-02 (55) ◽  
pp. 1589-1589
Author(s):  
Yasuhiro Shimizu ◽  
Tomotaka Ogawa ◽  
Taro Ueda ◽  
Kai Kamada ◽  
Takeo Hyodo
Keyword(s):  
Solid Electrolyte ◽  
Thick Film ◽  
Gas Sensors ◽  
Sensing Performance

scholarly journals Nanostructured SmFeO3 Gas Sensors: Investigation of the Gas Sensing Performance Reproducibility for Colorectal Cancer Screening

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5910
Author(s):  
Andrea Gaiardo ◽  
Giulia Zonta ◽  
Sandro Gherardi ◽  
Cesare Malagù ◽  
Barbara Fabbri ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Gas Sensors ◽  
Process Development ◽  
Gas Sensing ◽  
Diagnostic Tools ◽  
Fecal Samples ◽  
Recovery Times ◽  
Medical Diagnostic ◽  
Response And Recovery ◽  
Sensing Performance

Among the various chemoresistive gas sensing properties studied so far, the sensing response reproducibility, i.e., the capability to reproduce a device with the same sensing performance, has been poorly investigated. However, the reproducibility of the gas sensing performance is of fundamental importance for the employment of these devices in on-field applications, and to demonstrate the reliability of the process development. This sensor property became crucial for the preparation of medical diagnostic tools, in which the use of specific chemoresistive gas sensors along with a dedicated algorithm can be used for screening diseases. In this work, the reproducibility of SmFeO3 perovskite-based gas sensors has been investigated. A set of four SmFeO3 devices, obtained from the same screen-printing deposition, have been tested in laboratory with both controlled concentrations of CO and biological fecal samples. The fecal samples tested were employed in the clinical validation protocol of a prototype for non-invasive colorectal cancer prescreening. Sensors showed a high reproducibility degree, with an error lower than 2% of the response value for the test with CO and lower than 6% for fecal samples. Finally, the reproducibility of the SmFeO3 sensor response and recovery times for fecal samples was also evaluated.

Emerging 2D hybrid nanomaterials: towards enhanced sensitive and selective conductometric gas sensors at room temperature

2020 ◽  
Vol 8 (38) ◽  
pp. 13108-13126
Author(s):  
Hanie Hashtroudi ◽  
Ian D. R. Mackinnon ◽  
Mahnaz Shafiei
Keyword(s):  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
Hybrid Nanomaterials ◽  
Sensing Performance

Gas sensing performance of conductometric devices based on 2D hybrid nanomaterials operating at room temperature.

scholarly journals Enhancing the Sensing Performance of Zigzag Graphene Nanoribbon to Detect NO, NO2, and NH3 Gases

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 3932 ◽  
Author(s):  
Ehab Salih ◽  
Ahmad I. Ayesh
Keyword(s):  
Charge Transfer ◽  
Gas Sensors ◽  
Adsorption Energy ◽  
Gas Adsorption ◽  
Epoxy Group ◽  
Graphene Nanoribbon ◽  
Hydroxyl Group ◽  
Adsorption Parameters ◽  
Oh Groups ◽  
Sensing Performance

In this article, a zigzag graphene nanoribbon (ZGNR)-based sensor was built utilizing the Atomistic ToolKit Virtual NanoLab (ATK-VNL), and used to detect nitric oxide (NO), nitrogen dioxide (NO2), and ammonia (NH3). The successful adsorption of these gases on the surface of the ZGNR was investigated using adsorption energy (Eads), adsorption distance (D), charge transfer (∆Q), density of states (DOS), and band structure. Among the three gases, the ZGNR showed the highest adsorption energy for NO with −0.273 eV, the smallest adsorption distance with 2.88 Å, and the highest charge transfer with −0.104 e. Moreover, the DOS results reflected a significant increase of the density at the Fermi level due to the improvement of ZGNR conductivity as a result of gas adsorption. The surface of ZGNR was then modified with an epoxy group (-O-) once, then with a hydroxyl group (-OH), and finally with both (-O-) and (-OH) groups in order to improve the adsorption capacity of ZGNR. The adsorption parameters of ZGNR were improved significantly after the modification. The highest adsorption energy was found for the case of ZGNR-O-OH-NO2 with −0.953 eV, while the highest charge transfer was found for the case of ZGNR-OH-NO with −0.146 e. Consequently, ZGNR-OH and ZGNR-O-OH can be considered as promising gas sensors for NO and NO2, respectively.

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