Gas sensing properties of Cd-doped ZnO nanofibers synthesized by the electrospinning method

2014 ◽  
Vol 2 (39) ◽  
pp. 16697-16706 ◽  
Author(s):  
Shouli Bai ◽  
Song Chen ◽  
Yangbo Zhao ◽  
Teng Guo ◽  
Ruixian Luo ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Xps Analysis ◽  
Sensing Properties ◽  
Cd Doping ◽  
Electrospinning Method ◽  
Gas Sensing Properties ◽  
Zno Nanofibers ◽  
Doped Zno

The response of ZnO nanofibers is significantly enhanced via Cd doping, which can be attributed to the change of defects in ZnO and has been confirmed by PL and XPS analysis.

Correlating the magnetism and gas sensing properties of Mn-doped ZnO films enhanced by UV irradiation

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 26227-26238 ◽  
Author(s):  
David E. Motaung ◽  
Ioannis Kortidis ◽  
Gugu H. Mhlongo ◽  
Mart-Mari Duvenhage ◽  
Hendrik. C. Swart ◽  
...  
Keyword(s):  
Uv Irradiation ◽  
Gas Sensing ◽  
Zno Films ◽  
Schematic Diagram ◽  
Sensing Properties ◽  
Tof Sims ◽  
Gas Sensing Properties ◽  
Doped Zno ◽  
Mn Concentration ◽  
Mn Doped

Schematic diagram showing the 2D TOF SIMS overlays of Si+, Mn+and Zn+. The insert corresponds to the correlation between the sensing response and FMR signal as a function of Mn concentration when exposed to various gases.

Low level NO gas sensing properties of Cu doped ZnO thin films prepared by SILAR method

2018 ◽  
Vol 212 ◽  
pp. 292-295 ◽  
Author(s):  
T. Çorlu ◽  
I. Karaduman ◽  
S. Galioglu ◽  
B. Akata ◽  
M.A. Yıldırım ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Zno Thin Films ◽  
Silar Method ◽  
Sensing Properties ◽  
Low Level ◽  
Gas Sensing Properties ◽  
Doped Zno

scholarly journals Influence of Al Doping on the Morphological, Structural and Gas Sensing Properties of Electrochemically Deposited ZnO Films on Quartz Resonators

Coatings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 81
Author(s):  
Gergana Alexieva ◽  
Konstantin Lovchinov ◽  
Miroslav Petrov ◽  
Rositsa Gergova ◽  
Nikolay Tyutyundzhiev
Keyword(s):  
Gas Sensing ◽  
Zno Films ◽  
Active Surface Area ◽  
Average Roughness ◽  
Sensing Properties ◽  
Developed Surface ◽  
Gas Sensing Properties ◽  
Electrochemically Deposited ◽  
Doped Zno ◽  
Quartz Resonators

The detection of hazardous gases at different concentration levels at low and room temperature is still an actual and challenging task. In this paper, Al-doped ZnO thin films are synthesized by the electrochemical deposition method on the gold electrodes of AT-cut quartz resonators, vibrating at 10 MHz. The average roughness, surface morphology and gas sensing properties are investigated. The average roughness of Al-doped ZnO layers strongly depends on the amount of the doping agent Al2(SO4)3 added to the solution. The structural dependence of these films with varying Al concentrations is evident from the scanning electron microscopy images. The sensing properties to ethanol and ammonia analytes were tested in the range of 0–12,800 ppm. In the analysis of the sensitivity to ammonia, a dependence on the concentration of the added Al2(SO4)3 in the electrochemically deposited layers is also observed, as the most sensitive layer is at 3 × 10−5 M. The sensitivity and the detection limit in case of ammonia are, respectively, 0.03 Hz/ppm and 100 ppm for the optimal doping concentration. The sensitivity depends on the active surface area of the layers, with those with a more developed surface being more sensitive. Al-doped ZnO layers showed a good long-term stability and reproducibility towards ammonia and ethanol gases. In the case of ethanol, the sensitivity is an order lower than that for ammonia, as those deposited with Al2(SO4)3 do not practically react to ethanol.

Method for synthesizing ZnO of different nanostructures by electrospinning and study of their gas sensing properties

2019 ◽  
Vol 33 (25) ◽  
pp. 1950297
Author(s):  
Xiang-Bing Li ◽  
Shu-Yi Ma ◽  
Fu-Rong Li ◽  
Yu-Xiang Zhao ◽  
Xiao-Bin Liu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Gas Sensing ◽  
Component Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Electrospinning Method ◽  
Gas Sensing Properties ◽  
Zno Nanofibers ◽  
Scanning Electron

The properties of nanomaterials usually depend on their microstructures, the same material of different microstructures could be used for various applications. However, most devices could only synthesize a single microstructure, so it is meaningful that the different microstructures were synthesized by one method. In our study, electrospinning was applied to fabricate ZnO nanofibers and nanoparticles. In this approach, Zn(Ac)/PVP composite fibers of different component ratio were synthesized by electrospinning method which was subsequently calcined and formed ZnO nanofibers and nanoparticles. The microstructure, chemical composition and gas sensing were investigated with scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and WS-60A gas sensing measurement system. The synthesis mechanisms of ZnO nanofibers and nanoparticles were discussed in detail.

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