A study of surface defects in Tb doped ZnO nanoparticles for gas sensing applications

2019 ◽  
Author(s):  
A. Sharma ◽  
V. N. Rai
Keyword(s):  
Zno Nanoparticles ◽  
Surface Defects ◽  
Gas Sensing ◽  
Sensing Applications ◽  
Doped Zno

scholarly journals Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4425
Author(s):  
Ana María Pineda-Reyes ◽  
María R. Herrera-Rivera ◽  
Hugo Rojas-Chávez ◽  
Heriberto Cruz-Martínez ◽  
Dora I. Medina
Keyword(s):  
Carbon Monoxide ◽  
High Performance ◽  
Gas Sensing ◽  
Experimental Studies ◽  
Electrical Performance ◽  
Long Term Stability ◽  
Sensing Applications ◽  
Recent Advances ◽  
Sensitivity And Selectivity ◽  
Doped Zno

Monitoring and detecting carbon monoxide (CO) are critical because this gas is toxic and harmful to the ecosystem. In this respect, designing high-performance gas sensors for CO detection is necessary. Zinc oxide-based materials are promising for use as CO sensors, owing to their good sensing response, electrical performance, cost-effectiveness, long-term stability, low power consumption, ease of manufacturing, chemical stability, and non-toxicity. Nevertheless, further progress in gas sensing requires improving the selectivity and sensitivity, and lowering the operating temperature. Recently, different strategies have been implemented to improve the sensitivity and selectivity of ZnO to CO, highlighting the doping of ZnO. Many studies concluded that doped ZnO demonstrates better sensing properties than those of undoped ZnO in detecting CO. Therefore, in this review, we analyze and discuss, in detail, the recent advances in doped ZnO for CO sensing applications. First, experimental studies on ZnO doped with transition metals, boron group elements, and alkaline earth metals as CO sensors are comprehensively reviewed. We then focused on analyzing theoretical and combined experimental–theoretical studies. Finally, we present the conclusions and some perspectives for future investigations in the context of advancements in CO sensing using doped ZnO, which include room-temperature gas sensing.

LPG Gas Sensing Applications of SnO2/ZnO Nanoparticles

2014 ◽  
Vol 20 (5) ◽  
pp. 1198-1203 ◽  
Author(s):  
Shiva Sharma ◽  
Pratima Chauhan
Keyword(s):  
Zno Nanoparticles ◽  
Gas Sensing ◽  
Sensing Applications

Ag-Doped ZnO Nanoparticles for Enhanced Ethanol Gas Sensing Application

2018 ◽  
Vol 18 (5) ◽  
pp. 3557-3562 ◽  
Author(s):  
Ahmad Umar ◽  
M. Ajmal Khan ◽  
Rajesh Kumar ◽  
H Algarni
Keyword(s):  
Zno Nanoparticles ◽  
Gas Sensing ◽  
Doped Zno ◽  
Sensing Application

scholarly journals Mg-doped and chemo-thermally treated ZnO nanoflowers for ethanol sensing

2021 ◽  
Author(s):  
Santanu Maity ◽  
P.P Sahu ◽  
Tiju Thomas
Keyword(s):  
Gas Sensing ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sensing Applications ◽  
Wide Range ◽  
Doped Zno ◽  
Ethanol Sensing ◽  
Better Than ◽  
Mg Doped

Abstract ZnO nanostructures are promising for a wide range of applications, including gas sensors. Ethanol sensing using ZnO remains unexplored though. In this paper, we report ethanol-sensing using un-doped ZnO nano flowers and Mg doped ZnO nano flowers. These are grown using a rather simple chemo-thermal process, making this a plausibly scalable technology. To study the structural and morphological properties of undoped ZnO and Mg doped ZnO nanoflowers, Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), x-ray diffraction and Field Emission Scanning Electron Microscopy (FESEM) are carried out. Ethanol sensing properties of undoped ZnO and Mg doped ZnO nanoflower devices are investigated toward different ethanol concentration (concentration range of 1–600 ppm at 100°C–200°C). Our findings show that 15% Mg doped ZnO nano flower is better than ZnO nano flower for ethanol gas-sensing applications.

scholarly journals Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

Crystals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 188 ◽  
Author(s):  
Chandra Prakash Goyal ◽  
Deepak Goyal ◽  
Sinjumol K. Rajan ◽  
Niranjan S. Ramgir ◽  
Yosuke Shimura ◽  
...  
Keyword(s):  
Work Function ◽  
Surface Defects ◽  
Gas Sensing ◽  
Oxygen Adsorption ◽  
Precipitation Method ◽  
Zn Doping ◽  
Sensor Resistance ◽  
Sensing Applications ◽  
Zinc Doping ◽  
Co Precipitation

Monodispersed CuO octahedral crystals were successfully synthesized using a low-temperature co-precipitation method. Zinc doping in CuO created surface defects that enhanced oxygen adsorption on the surface crucial for gas sensing applications. Pure and Zn-doped CuO sensor films were realized using the doctor blade method. The sensor films showed selective response towards a low concentration of NO2 at a lower operating temperature of 150 °C. Doping with Zn causes the resistance of the sensor film to decrease due to the enhancement of charge carriers with an analogous improvement in the sensor response. The observed decrease in sensor resistance agreed well with the findings of the work function studies. Zinc doping resulted in an increase in work function by 180 meV which, after NO2 exposure, was found to increase by a further 130 meV, attributed to the oxidizing behavior of the test gas.

Sign in / Sign up

Export Citation Format

Share Document