scholarly journals Significance of the Nanograin Size on the H2S-Sensing Ability of CuO-SnO2Composite Nanofibers

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Akash Katoch ◽  
Jae-Hun Kim ◽  
Sang Sub Kim
Keyword(s):  
Thermal Treatment ◽  
Treatment Duration ◽  
Composite Nanofibers ◽  
Sensing Properties ◽  
Isothermal Conditions ◽  
Nanograin Size

CuO-SnO2composite nanofibers with various nanograin sizes were synthesized for investigating their sensing properties with respect to H2S gas. The nanograin size in the CuO-SnO2composite nanofibers was controlled by changing the thermal treatment duration under isothermal conditions. The nanograin size was found to be critical for the sensing ability of the composite nanofibers. The CuO-SnO2composite nanofibers comprised of small-sized nanograins were more sensitive to H2S than those with larger-sized nanograins. The superior sensing properties of the CuO-SnO2composite nanofibers with the smaller nanograins were attributed to the formation of the larger number ofp-CuO-n-SnO2junctions and their transformation tometallic-CuS-n-SnO2contacts upon exposure to H2S gas. The results suggest that smaller nanograins are conducive to obtaining superior H2S-sensing properties in CuO-SnO2composite nanofibers.

Importance of the nanograin size on the H2S-sensing properties of ZnO–CuO composite nanofibers

2015 ◽  
Vol 214 ◽  
pp. 111-116 ◽  
Author(s):  
Akash Katoch ◽  
Sun-Woo Choi ◽  
Jae-Hun Kim ◽  
Jae Hyoung Lee ◽  
Jun-Seong Lee ◽  
...  
Keyword(s):  
Composite Nanofibers ◽  
Sensing Properties ◽  
Nanograin Size

scholarly journals Effect of CSA Concentration on the Ammonia Sensing Properties of CSA-Doped PA6/PANI Composite Nanofibers

Sensors ◽  
2014 ◽  
Vol 14 (11) ◽  
pp. 21453-21465 ◽  
Author(s):  
Zengyuan Pang ◽  
Jiapeng Fu ◽  
Pengfei Lv ◽  
Fenglin Huang ◽  
Qufu Wei
Keyword(s):  
Composite Nanofibers ◽  
Sensing Properties ◽  
Ammonia Sensing ◽  
Pani Composite

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

Preparation and Ammonia Sensing Properties of PANI-TSA/PA6 Core-Shell Nanofibers by Electrospinning

2011 ◽  
Vol 421 ◽  
pp. 23-26 ◽  
Author(s):  
Yi Jun Pan ◽  
Xian Jun Dong ◽  
Qu Fu Wei ◽  
Wei Min Hung ◽  
Chao Yu Lin ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Composite Nanofibers ◽  
Electrospinning Process ◽  
Core Shell ◽  
Formic Acid Solution ◽  
Sensing Properties ◽  
Ammonia Sensing ◽  
Structure And Morphology ◽  
Toluene Sulfonic Acid ◽  
Good Potential

PANI-TSA/PA6 core-shell nanofibers were prepared via the electrospinning process with a PA6/formic acid solution and the chemical polymerization of PANI doped with p-toluene sulfonic acid (TSA) on the surface of the PA6 nanofibers. Their structure and morphology were examined by FE-SEM and FTIR and the fabrication mechanism and ammonia sensing properties of the PANI-TSA/PA6 nanofibers were also investigated. All the results showed that, composite nanofibers with PANI-TSA shell and PA6 core had been prepared successfully, which showed a good potential in ammonia sensitivity application.

scholarly journals Effect of NiO Loading and Thermal Treatment Duration on Performance of Ni/SBA-15 Catalyst in Combined Steam and CO2 Reforming of CH4

2018 ◽  
Vol 59 (12) ◽  
pp. 1898-1902 ◽  
Author(s):  
Phan Hong Phuong ◽  
Luu Cam Loc ◽  
Hoang Tien Cuong ◽  
Nguyen Tri
Keyword(s):  
Thermal Treatment ◽  
Treatment Duration
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