Structural and Moisture Sensing Properties of WO 3 -ZnO Nanocomposites Synthesized by a Soft Chemical Route

2018 ◽  
Vol 5 (3) ◽  
pp. 9082-9088 ◽  
Author(s):  
Vandna Shakya ◽  
Narendra Kumar Pandey
Keyword(s):  
Chemical Route ◽  
Sensing Properties ◽  
Moisture Sensing ◽  
Soft Chemical Route

Polyaniline/SnO2 Nanocomposite Sensor for NO2 Gas Sensing at Low Operating Temperature

2015 ◽  
Vol 14 (04) ◽  
pp. 1550011 ◽  
Author(s):  
A. Sharma ◽  
M. Tomar ◽  
V. Gupta ◽  
A. Badola ◽  
N. Goswami
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Chemical Route ◽  
Sensing Properties ◽  
Response Recovery ◽  
Transmission Electron ◽  
Gas Sensing Properties

In this paper gas sensing properties of 0.5–3% polyaniline (PAni) doped SnO 2 thin films sensors prepared by chemical route have been studied towards the trace level detection of NO 2 gas. The structural, optical and surface morphological properties of the PAni doped SnO 2 thin films were investigated by performing X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Raman spectroscopy measurements. A good correlation has been identified between the microstructural and gas sensing properties of these prepared sensors. Out of these films, 1% PAni doped SnO 2 sensor showed high sensitivity towards NO 2 gas along with a sensitivity of 3.01 × 102 at 40°C for 10 ppm of gas. On exposure to NO 2 gas, resistance of all sensors increased to a large extent, even greater than three orders of magnitude. These changes in resistance upon removal of NO 2 gas are found to be reversible in nature and the prepared composite film sensors showed good sensitivity with relatively faster response/recovery speeds.

scholarly journals Formation of defect-fluorite structured NdNiOxHy epitaxial thin films via a soft chemical route from NdNiO3 precursors

2016 ◽  
Vol 45 (30) ◽  
pp. 12114-12118 ◽  
Author(s):  
T. Onozuka ◽  
A. Chikamatsu ◽  
T. Katayama ◽  
T. Fukumura ◽  
T. Hasegawa
Keyword(s):  
Thin Films ◽  
Chemical Reaction ◽  
Fluorite Structure ◽  
Epitaxial Thin Films ◽  
Chemical Route ◽  
New Phase ◽  
Soft Chemical Route

A new phase of oxyhydride NdNiOxHy with a defect-fluorite structure was obtained by a soft chemical reaction of NdNiO3 epitaxial thin films on a substrate of SrTiO3 (100) with CaH2.

Soft chemical route and new solid oxide fuel cells

Ionics ◽  
1998 ◽  
Vol 4 (5-6) ◽  
pp. 463-471 ◽  
Author(s):  
Xia Changrong ◽  
Gu Yunfeng ◽  
Peng Dingkun ◽  
Meng Guangyao
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Chemical Route ◽  
Soft Chemical Route

scholarly journals Simple New Method for the Preparation of La(IO3)3 Nanoparticles

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2400 ◽  
Author(s):  
Zoulikha Hebboul ◽  
Amira Ghozlane ◽  
Robin Turnbull ◽  
Ali Benghia ◽  
Sara Allaoui ◽  
...  
Keyword(s):  
Single Phase ◽  
New Method ◽  
X Ray Diffraction ◽  
Chemical Route ◽  
X Ray ◽  
The Common ◽  
Controlled Preparation ◽  
Iodate Ions ◽  
Scanning Electron ◽  
Soft Chemical Route

We present a cost- and time-efficient method for the controlled preparation of single phase La(IO3)3 nanoparticles via a simple soft-chemical route, which takes a matter of hours, thereby providing an alternative to the common hydrothermal method, which takes days. Nanoparticles of pure α-La(IO3)3 and pure δ-La(IO3)3 were synthesised via the new method depending on the source of iodate ions, thereby demonstrating the versatility of the synthesis route. The crystal structure, nanoparticle size-dispersal, and chemical composition were characterised via angle- and energy-dispersive powder X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy.

scholarly journals Selective Synthesis and Luminescence Properties of Nanocrystalline GdF3:Eu3+with Hexagonal and Orthorhombic Structures

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Xiaoting Zhang ◽  
Tomokatsu Hayakawa ◽  
Masayuki Nogami ◽  
Yukari Ishikawa
Keyword(s):  
Formation Mechanism ◽  
Room Temperature ◽  
Luminescence Properties ◽  
Selective Synthesis ◽  
Orthorhombic Structure ◽  
Chemical Route ◽  
Structure And Morphology ◽  
First Time ◽  
Soft Chemical Route

GdF3:Eu3+nanophosphors with hexagonal or orthorhombic structure have been succeeded to be selectively synthesized at room temperature for the first time via a simple soft chemical route. The structure and morphology of GdF3:Eu3+nanophosphors were controlled by using different fluoride precursors. Hexagonal GdF3:Eu3+nanocrystals were formed when NaBF4was used as a fluoride precursor, while orthorhombic GdF3:Eu3+nanocrystals were obtained with NaF or NH4F fluoride precursor. It was also experimentally revealed that hexagonal GdF3:Eu3+nanophosphors emitted essentially stronger Eu3+luminescence than orthorhombic ones did. The formation mechanism of GdF3nanocrystals and the possible reasons of the strong PL in hexagonal were discussed.

Effect of Iron Substitution on Structure and Optical Properties of Nanocrystalline CaTiO3

2008 ◽  
Vol 3 ◽  
pp. 123-128 ◽  
Author(s):  
A. Bandyopadhyay ◽  
S. Mondal ◽  
M. Pal ◽  
Umapada Pal ◽  
M. Pal
Keyword(s):  
Crystal Structure ◽  
Particle Size ◽  
Iron Concentration ◽  
Rietveld Analysis ◽  
Exothermic Peak ◽  
Optical And Electrical Properties ◽  
X Ray Diffraction ◽  
Chemical Route ◽  
X Ray ◽  
Soft Chemical Route

Nanocrystalline CaTiO3 powders doped with Fe2O3 have been prepared using a soft chemical route. Precipitation of CaTiO3 nanocrystals has been studied by monitoring the exothermic peak in their DSC spectra. The crystal growth temperature of the samples depends on the concentration of iron. Surface morphology, crystal structure, optical and electrical properties of the nanostructures are investigated. X-ray diffraction study shows that the as-prepared powders are amorphous in nature and CaTiO3 phase formation starts at around 500 0C. Rietveld analysis revealed that the particle size of iron substituted CaTiO3 is in nanometer range. Optical bandgap of the nanostructures varies from 4.3 to 3.7 eV for the variation of iron concentration from 0.05 to 0.2 mole %.

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