Fabrication and Gas Sensing Properties of Nano γ-Fe2O3/ZnO Double-Layer Film Gas Sensor

2010 ◽  
Vol 29-32 ◽  
pp. 602-606 ◽  
Author(s):  
Kai Jin Huang ◽  
Li Yan ◽  
Chang Sheng Xie
Keyword(s):  
Gas Sensor ◽  
Double Layer ◽  
Gas Sensing ◽  
Single Layer ◽  
Gas Sensitivity ◽  
Layer Film ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Single Layer Film ◽  
Screen Printing Technology

The nano γ-Fe2O3/ZnO double-layer film gas sensor was fabricated by the screen printing technology and the hydrothermal method. XRD and SEM techniques were used to characterize the phases and morphologies of the film. The gas sensing properties of the gas sensor to ethanol were investigated. The result shows that the gas sensitivity of the gas sensor is higher than that of the nano γ-Fe2O3 single-layer film gas sensor and the nano ZnO single-layer film gas sensor. The high gas sensitivity of the nano γ-Fe2O3/ZnO double-layer film to ethanol was caused by the combined effect and nano effect.

High Ethanol Gas Sensitivity of Nano γ-Fe2O3/ZnO Double-Layer Films Prepared by the Screen Printing Technology and the Hydrothermal Method

2012 ◽  
Vol 151 ◽  
pp. 350-354
Author(s):  
Kai Jin Huang ◽  
Shou Wei Ma ◽  
Fang Li Yuan
Keyword(s):  
Citric Acid ◽  
Double Layer ◽  
Screen Printing ◽  
Hydrothermal Process ◽  
Single Layer ◽  
Gas Sensitivity ◽  
Printing Technology ◽  
Single Layer Film ◽  
Screen Printing Technology ◽  
High Ethanol

The gas sensor with high ethanol gas sensitivity made of nano γ-Fe2O3/ZnO double-layer films was fabricated by the screen printing technology and the hydrothermal process with addition of citric acid (CA) surfactant based on Zn(NO3)2·6H2O and HMTA. XRD and SEM techniques were used to characterize the phases and morphologies of the films. The gas sensing properties of the gas sensor to ethanol were investigated. The result shows that the gas sensitivity of the nano γ-Fe2O3/ZnO double-layer films is higher than that of the nano γ-Fe2O3 single-layer film fabricated by the screen printing technology and the nano ZnO single-layer film fabricated by the hydrothermal process with addition of citric acid (CA) surfactant based on Zn(NO3)2·6H2O and HMTA, respectively. The high ethanol gas sensitivity of the nano γ-Fe2O3/ZnO double-layer films was caused by the nano effect and the special energy band structure

Fabrication and gas sensitivity in heterostructures of ortho-chloropolyaniline–ZnO nanocomposites

RSC Advances ◽  
2014 ◽  
Vol 4 (75) ◽  
pp. 39844-39852 ◽  
Author(s):  
Syed Khasim ◽  
Omar A Al-Hartomy
Keyword(s):  
Polymer Nanocomposites ◽  
Conducting Polymer ◽  
Gas Sensing ◽  
Gas Sensitivity ◽  
Sensing Properties ◽  
Gas Sensing Properties

Recently, the gas-sensing properties of conducting polymer nanocomposites have been widely investigated. In this study we report the gas sensing properties of novel ortho- chloropolyaniline–ZnO nanocomposites.

scholarly journals Preparation of Nanostructured SnO2-NiO Composite Semiconductor for Gas Sensor Applications

2021 ◽  
pp. 391-403
Author(s):  
S. Kumar ◽  
P. Gowthaman ◽  
J. Deenathayalan
Keyword(s):  
Gas Sensor ◽  
Composite Nanofibers ◽  
Volume Fraction ◽  
Gas Sensing ◽  
Precipitation Method ◽  
Response Sensitivity ◽  
X Ray ◽  
Sensing Properties ◽  
Working Temperature ◽  
Gas Sensing Properties

Electro spinning technology combined with chemical precipitation method and high-temperature calcination was used to prepare SnO2-NiO composite semiconductor nanofibers with different Sn content. Scanning electron microscope (SEM), X-ray diffractometer (XRD) and energy dispersive X-ray spectrometer (EDS) were used to characterize the morphology, structure and content of various elements of the sample. Using ethanol as the target gas, the gas sensing properties of SnO2-NiO nanofibers and the influence of Sn content on the gas sensing properties of composite nanofibers were explored. The research results show that SnO2-NiO composite nanofibers have a three-dimensional network structure, and the SnO2 composite can significantly enhance the gas sensitivity of NiO nanofibers. With increase of SnO2 content, the response sensitivity of composite fibers to ethanol gas increases, and the response sensitivity of composite nanofibers with the highest response to ethanol gas with a volume fraction of 100×10-6 at the optimal working temperature of 160℃ are13.4;It is 8.38 times the maximum response sensitivity of NiO nanofibers. Compared with the common ethanol gas sensor MQ-3 on the market, SnO2-NiO composite nanofibers have a lower optimal working temperature and higher response sensitivity, which has certain practical application value

scholarly journals Chemically synthesized PbS Nano particulate thin films for a rapid NO2 gas sensor

2016 ◽  
Vol 34 (1) ◽  
pp. 204-211 ◽  
Author(s):  
Vishal V. Burungale ◽  
Rupesh S. Devan ◽  
Sachin A. Pawar ◽  
Namdev S. Harale ◽  
Vithoba L. Patil ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Operating Temperature ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Gas Sensitivity ◽  
Silar Method ◽  
Layer Adsorption ◽  
Gas Sensing Properties

AbstractRapid NO2 gas sensor has been developed based on PbS nanoparticulate thin films synthesized by Successive Ionic Layer Adsorption and Reaction (SILAR) method at different precursor concentrations. The structural and morphological properties were investigated by means of X-ray diffraction and field emission scanning electron microscope. NO2 gas sensing properties of PbS thin films deposited at different concentrations were tested. PbS film with 0.25 M precursor concentration showed the highest sensitivity. In order to optimize the operating temperature, the sensitivity of the sensor to 50 ppm NO2 gas was measured at different operating temperatures, from 50 to 200 °C. The gas sensitivity increased with an increase in operating temperature and achieved the maximum value at 150 °C, followed by a decrease in sensitivity with further increase of the operating temperature. The sensitivity was about 35 % for 50 ppm NO2 at 150 °C with rapid response time of 6 s. T90 and T10 recovery time was 97 s at this gas concentration.

UV enhanced NO gas sensing properties of the MoS2 monolayer gas sensor

2019 ◽  
Vol 6 (8) ◽  
pp. 085075 ◽  
Author(s):  
S Ramu ◽  
T Chandrakalavathi ◽  
G Murali ◽  
K Sunil Kumar ◽  
A Sudharani ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Mos2 Monolayer ◽  
Gas Sensing Properties

Gas‐Sensing Properties of Th / SnO2 Thin‐Film Gas Sensor to Trimethylamine

1999 ◽  
Vol 146 (9) ◽  
pp. 3536-3537 ◽  
Author(s):  
P. H. Wei ◽  
G. B. Li ◽  
S. Y. Zhao ◽  
L. R. Chen
Keyword(s):  
Thin Film ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Sno2 Thin Film ◽  
Sensing Properties ◽  
Gas Sensing Properties

Humidity and CO2 gas sensing properties of double-layer graphene

Carbon ◽  
2018 ◽  
Vol 127 ◽  
pp. 576-587 ◽  
Author(s):  
Xuge Fan ◽  
Karim Elgammal ◽  
Anderson D. Smith ◽  
Mikael Östling ◽  
Anna Delin ◽  
...  
Keyword(s):  
Double Layer ◽  
Gas Sensing ◽  
Co2 Gas ◽  
Sensing Properties ◽  
Layer Graphene ◽  
Gas Sensing Properties

A model for the impact of the nanostructure size on its gas sensing properties

RSC Advances ◽  
2015 ◽  
Vol 5 (125) ◽  
pp. 103195-103202 ◽  
Author(s):  
Mohammad R. Alenezi ◽  
T. H. Alzanki ◽  
A. M. Almeshal ◽  
A. S. Alshammari ◽  
M. J. Beliatis ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
The Impact

The size of a metal oxide nanostructure plays a key role in its performance as a gas sensor.

Self-templating synthesis of a fluorescent porphyrin doped poly(methyl methacrylate) nano-array and its HCl gas sensing properties

2016 ◽  
Vol 8 (35) ◽  
pp. 6489-6493 ◽  
Author(s):  
Wei-min Kang ◽  
Xiao-min Ma ◽  
Min Hu ◽  
Zhi-xia Jia ◽  
Hao Liu ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Synthesis Method ◽  
Sensing Properties ◽  
Poly Methyl Methacrylate ◽  
Gas Sensing Properties ◽  
Hcl Gas ◽  
Ppm Level ◽  
Templating Synthesis

A highly ordered 5,10,15,20-tetraphenylporphyrin doped poly(methyl methacrylate) nano-array was developed via a facile self-templating synthesis method, which improves the sensitivity of the HCl gas sensor to the ppm-level.

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