scholarly journals Gas sensing properties of CuFe2 O4 nanoparticles prepared by spray co-precipitation method

2019 ◽  
Vol 57 (1) ◽  
pp. 32-38
Author(s):  
Pham Thi Thanh Hoa ◽  
Nguyen Phuc Duong ◽  
To Thanh Loan ◽  
Luong Ngoc Anh ◽  
Nguyen Minh Hong
Keyword(s):  
Gas Sensing ◽  
Precipitation Method ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Co Precipitation

Gas sensing properties of magnesium ferrite prepared by co-precipitation method

2009 ◽  
Vol 488 (1) ◽  
pp. 270-272 ◽  
Author(s):  
P.P. Hankare ◽  
S.D. Jadhav ◽  
U.B. Sankpal ◽  
R.P. Patil ◽  
R. Sasikala ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Precipitation Method ◽  
Magnesium Ferrite ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Co Precipitation

Synthesis and Gas Sensing Properties of SnO2-CuO Nanocomposites

2013 ◽  
Vol 645 ◽  
pp. 129-132 ◽  
Author(s):  
Jantasom Khanidtha ◽  
Suttinart Noothongkaew ◽  
Supakorn Pukird
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Precipitation Method ◽  
Monoclinic Structure ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Co Precipitation

SnO2-CuO nanocomposites have been synthesized with the simple co-precipitation method for gas sensing properties. Sn and CuO powder were the starting materials. The synthesized products were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that SnO2-CuO nanocomposites have a tetragonal and monoclinic structure, respectively. SEM images verify that the some microballs are up to 10 µm and nanorods have a diameter range from 10-100 nm, while length ranges a few micrometers. The nanocomposite products were highly sensitivity to CO2gas at room temperature.

scholarly journals Gas Sensing Properties of ZnO-SnO2 Nanocomposite

2019 ◽  
Vol 32 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Pushpendra Kumar ◽  
Deepak Kumar
Keyword(s):  
Gas Sensing ◽  
Rutile Phase ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Wurtzite Phase ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Response And Recovery ◽  
Uv Visible ◽  
Co Precipitation

In present study, ZnO-SnO2 nanocomposite was synthesized by co-precipitation method and its sensing properties with respect to carbon monoxide gas were investigated. X-ray diffraction pattern shows the exhaustive evolution of hexagonal wurtzite phase of ZnO and rutile phase of SnO2. Morphological study was done by FE-SEM and optical characterization was done by UV-visible spectrophotometer. To study the sensing properties, material was layered on conducting substrate and resistance was recorded in the presence of air and CO gas at different operating temperature. Sensing responses of pure ZnO and ZnO-SnO2 composite was also compared. ZnO-SnO2 showed much enhanced response along with better response and recovery time compared to pure ZnO.

scholarly journals Characteristics and Sensing Properties of the La1-xNdxCo0.3Fe0.7O3 System for CO Gas Sensors

2016 ◽  
Vol 1 (1) ◽  
pp. 36
Author(s):  
J.C. Ding ◽  
Z.P. Wu ◽  
H.Y. Li ◽  
Z.X. Cai ◽  
X.X. Wang ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Gas Sensing ◽  
Precipitation Method ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Co Precipitation ◽  
Perovskite Type ◽  
Co Gas

<p>A series of nanostructured La<sub>1-x</sub>Nd<sub>x</sub>Co<sub>0.3</sub>Fe<sub>0.7</sub>O<sub>3</sub> perovskite-type (x ranging from 0 to 1) were prepared using the co-precipitation method. CO gas sensing properties of La<sub>1-x</sub>Nd<sub>x</sub>Co<sub>0.3</sub>Fe<sub>0.7</sub>O<sub>3</sub> sensors were performed. La<sub>0.7</sub>Nd<sub>0.3</sub>Co<sub>0.3</sub>Fe<sub>0.7</sub>O<sub>3</sub> sensor showed the highest response at 250 °C (S=52.8).</p>

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

Gas-Sensing Properties of Needle-Shaped Ni-Doped SnO2 Nanocrystals Prepared by a Simple Sol-Gel Chemical Precipitation Method

2010 ◽  
Vol 5 (11) ◽  
pp. 2379-2385 ◽  
Author(s):  
Rajeswari Yogamalar ◽  
Vellusamy Mahendran ◽  
Ramasamy Srinivasan ◽  
Ali Beitollahi ◽  
R. Pradeep Kumar ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sol Gel ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Sensing Properties ◽  
Sno2 Nanocrystals ◽  
Gas Sensing Properties

Gas sensing properties of nanocrystalline tungsten oxide synthesized by acid precipitation method

2010 ◽  
Vol 150 (1) ◽  
pp. 384-388 ◽  
Author(s):  
T.D. Senguttuvan ◽  
Vibha Srivastava ◽  
Jai S. Tawal ◽  
Monika Mishra ◽  
Shubhda Srivastava ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Gas Sensing ◽  
Acid Precipitation ◽  
Precipitation Method ◽  
Sensing Properties ◽  
Gas Sensing Properties

Nd 3+ Substituted Nanocrystalline Zinc Ferrite Sensors for Ethanol, LPG and Chlorine

2013 ◽  
Vol 310 ◽  
pp. 150-153 ◽  
Author(s):  
Pramod N. Vasambekar ◽  
Tukaram J. Shinde ◽  
Ashok B. Gadkari
Keyword(s):  
Zinc Ferrite ◽  
Gas Sensing ◽  
Operating Temperature ◽  
Maximum Sensitivity ◽  
Precipitation Method ◽  
Chemical Formula ◽  
Response Recovery ◽  
Gas Sensing Properties ◽  
Recovery Times ◽  
Co Precipitation

Nd 3+ substituted zinc ferrites with chemical formula ZnNdxFe 2-x O4 (x = 0, 0.01, 0.02, and 0.03) were prepared by oxalate co-precipitation method and characterized by XRD, IR and SEM techniques. The gas sensing properties were studied for ethanol, LPG and chlorine. It was observed that nanocrystalline ZnFe2O4 shows maximum sensitivity to ethanol (~41%) followed by LPG (~22%) and less sensitivity to Cl2 (~10%) at an operating temperature of 327oC. The sensitivity of zinc ferrites increases with increase in Nd 3+ content. Response-recovery times of zinc ferrite decreases with increase in Nd3+ content.

Co-precipitation synthesis and gas-sensing properties of ZnO hollow sphere with porous shell

2011 ◽  
Vol 156 (2) ◽  
pp. 703-708 ◽  
Author(s):  
Fan Meng ◽  
Jing Yin ◽  
Yue-Qin Duan ◽  
Zhi-Hao Yuan ◽  
Li-Jian Bie
Keyword(s):  
Hollow Sphere ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Porous Shell ◽  
Gas Sensing Properties ◽  
Precipitation Synthesis ◽  
Co Precipitation
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