Novel low-temperature growth of SnO2 nanowires and their gas-sensing properties

2013 ◽  
Vol 68 (6) ◽  
pp. 408-411 ◽  
Author(s):  
R. Rakesh Kumar ◽  
Mitesh Parmar ◽  
K. Narasimha Rao ◽  
K. Rajanna ◽  
A.R. Phani
Keyword(s):  
Low Temperature ◽  
Gas Sensing ◽  
Temperature Growth ◽  
Sensing Properties ◽  
Low Temperature Growth ◽  
Sno2 Nanowires ◽  
Gas Sensing Properties

Low temperature solution-based synthesis of porous flower-like α-Fe2O3 superstructures and their excellent gas-sensing properties

2011 ◽  
Vol 160 (1) ◽  
pp. 1372-1379 ◽  
Author(s):  
Wei Yan ◽  
Huiqing Fan ◽  
Yuchun Zhai ◽  
Chao Yang ◽  
Pengrong Ren ◽  
...  
Keyword(s):  
Low Temperature ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Temperature Solution

On the Role of Oxygen Vacancies in the Determination of the Gas-Sensing Properties of Tin-Oxide Nanowires

2006 ◽  
Vol 915 ◽  
Author(s):  
Roberto Mosca ◽  
Mingzheng Zha ◽  
Davide Calestani ◽  
Laura Lazzarini ◽  
Giancarlo Salviati ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Oxygen Vacancies ◽  
Gas Sensing ◽  
Oxide Nanowires ◽  
Sensing Properties ◽  
Sno2 Nanowires ◽  
Gas Sensing Properties ◽  
First Results ◽  
Depth Study

AbstractSnO2 nanowires have been recently employed in the “gas-sensors” field and excellent results of conductometric and optical tests on SnO2 nanowires-based gas sensors have been reported.However, the mechanism that controls the gas-sensing effect in metal oxides nanowires is not fully understood yet. Here the authors present the first results of an in-depth study about the influence of post growth treatments on the physical and gas sensing properties of SnO2 nanowires.In particular, SnO2 nanowires grown by a vapour transport technique were annealed in a oxygen-rich atmosphere and then characterized by different techniques to assess the influence of the treatment on the nanowires properties.The annealing in oxygen atmosphere is shown to strongly affect the PL and CL spectra, the electrical resistivity as well as the gas sensing properties of the nanowires. The obtained results are consistent with a reduction of the oxygen vacancies concentration induced by the O2 treatment and seem to confirm the role of these defects in affecting the gas response of SnO2 nanowires-based sensors.

scholarly journals A novel composite of CdS nanorods growing on a polyaniline-Cd2+ particles surface with excellent formaldehyde gas sensing properties at low temperature

RSC Advances ◽  
2018 ◽  
Vol 8 (54) ◽  
pp. 30747-30754 ◽  
Author(s):  
Ling Zhang ◽  
Xifeng Li ◽  
Zonggang Mu ◽  
Jing Miao ◽  
Kun Wang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Gas Sensing ◽  
Synthesis Method ◽  
Hexagonal Wurtzite Structure ◽  
Wurtzite Structure ◽  
Sensing Properties ◽  
Cds Nanorods ◽  
Gas Sensing Properties ◽  
Structure Phase

A novel composite, CdS nanorods growing on a polyaniline-Cd2+ particles surface (CdS/PANI) with a hexagonal wurtzite structure phase, was prepared using a hydrothermal synthesis method.

scholarly journals Synthesis, Characterization and Gas Sensing Study of ZnO-SnO2 Nanocomposite Thin Films

Chemosensors ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 124
Author(s):  
Victor V. Petrov ◽  
Victor V. Sysoev ◽  
Aleksandra P. Starnikova ◽  
Maria G. Volkova ◽  
Zamir Kh. Kalazhokov ◽  
...  
Keyword(s):  
Low Temperature ◽  
Tin Dioxide ◽  
Gas Sensing ◽  
Solid Phase ◽  
Nanocomposite Films ◽  
Oxide Material ◽  
X Ray ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Low Temperature Pyrolysis

Thin nanocomposite films composed of ZnO and SnO2 at 0.5–5 mol.% concentrations were synthesized by a new solid-phase low-temperature pyrolysis under the developed protocols. This hetero-oxide material was thoroughly studied by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES) techniques to be compared with electrical and gas-sensing properties. We have found that the films have a poly-nanocrystal structure of ZnO and SnO2 crystals with characteristic grain sizes at 10–15 nm range. When comparing the chemiresistive response of the films with varied tin dioxide content, the sample of Sn:Zn optimum ratio taken as 1:99 yields 1.5-fold improvement upon to 5–50 ppm NO2 exposure at 200 °C. We argue that these remarkable changes have matured from both a reducing the intergrain potential barrier down to 0.58 eV and increasing the concentration of anionic vacancies at this rational composite. The results demonstrate that solid-phase low-temperature pyrolysis is a powerful technique for adjusting the functional gas-sensing properties of hetero-oxide film via modifying the ratio of the oxide components.

Enhancement of gas sensing properties by the functionalization of ZnO-branched SnO2 nanowires with Cr2O3 nanoparticles

2017 ◽  
Vol 249 ◽  
pp. 656-666 ◽  
Author(s):  
Yong Jung Kwon ◽  
Sung Yong Kang ◽  
Ali Mirzaei ◽  
Myung Sik Choi ◽  
Jae Hoon Bang ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sensing Properties ◽  
Sno2 Nanowires ◽  
Gas Sensing Properties ◽  
Cr2o3 Nanoparticles
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