scholarly journals Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5889
Author(s):  
Jeyapaul Sam Jebakumar ◽  
Asokan Vimala Juliet
Keyword(s):  
Carbon Monoxide ◽  
Tin Oxide ◽  
Coming Out ◽  
Sno2 Nanoparticles ◽  
Chemical Precipitation ◽  
Air Pollutant ◽  
Precipitation Method ◽  
Chloride Dihydrate ◽  
Sensor Material ◽  
Tin Oxide Nanoparticles

The exhaust gases from various sources cause air pollution, which is a leading contributor to the global disease burden. Hence, it has become vital to monitor and control the increasing pollutants coming out of the various sources into the environment. This paper has designed and developed a sensor material to determine the amount of carbon monoxide (CO), which is one of the major primary air pollutants produced by human activity. Nanoparticle-based sensors have several benefits in sensitivity and specificity over sensors made from traditional materials. In this study, tin oxide (SnO2), which has greater sensitivity to the target gas, is selected as the sensing material which selectively senses only CO. Tin oxide nanoparticles have been synthesized from stannous chloride dihydrate chemical compound by chemical precipitation method. Palladium, at the concentration of 0.1%, 0.2%, and 0.3% by weight, was added to tin oxide and the results were compared. Synthesized samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) techniques. XRD revealed the tetragonal structure of the SnO2 nanoparticles and FESEM analysis showed the size of the nanoparticles to be about 7–20 nm. Further, the real-time sensor testing was performed and the results proved that the tin oxide sensor, doped with 0.2% palladium, senses the CO gas more efficiently with greater sensitivity.

scholarly journals Synthesis Sensitive Layer of Ethylene Gas Sensor Based Tin Oxide Nanoparticles Using Water as Solvent In Precipitation Method

2018 ◽  
Vol 159 ◽  
pp. 01060
Author(s):  
Erica Caesariaty Harni Prima Nabena ◽  
Brian Yuliarto ◽  
Nugraha ◽  
Muhammad Iqbal
Keyword(s):  
Gas Sensor ◽  
Tin Oxide ◽  
Water Solution ◽  
Precipitation Method ◽  
Pure Sno2 ◽  
Maturity Level ◽  
Sensitive Layer ◽  
Water As Solvent ◽  
Sno2 Nanoparticle ◽  
Tin Oxide Nanoparticles

Ethylene gas is a gas naturally released by fruits. The maturity level of these fruits could be predicted from the amount of ethylene around them. To maintain the freshness of these fruits, the concentrations of surrounding ethylene need to be monitored. Therefore, suitable gas sensor ethylene were still in progress to get good respond. In this paper systhesis of pure SnO2 nanoparticle from SnCl2.2H2O and water solution in precipitation method was held. The tin oxide powder was obtained in good distribution with nanoparticle size. This nanoparticle powder was formed into thick film, using ethylene glycol as solvant. To observe this sensor characteristics, several test was held in various conditions. Gas testing used pure ethylene gas show better respond at higher than room temperature but recovery time still unsatisfying.

EFFECT OF SURFACTANTS ON THE SIZE, COLOR, PHOTOLUMINESCENCE AND RESISTIVITY OF INDIUM TIN OXIDE NANOPARTICLES PREPARED BY CO-PRECIPITATION METHOD

2012 ◽  
Vol 19 (05) ◽  
pp. 1250054 ◽  
Author(s):  
AYYOOB JAFARI ◽  
YADOLAH GANJKHANLOU ◽  
MAHMOOD KAZEMZAD ◽  
HAMZEH GHORBANI
Keyword(s):  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
Tin Oxide Nanoparticles ◽  
Xrd Patterns ◽  
Ito Nanoparticles ◽  
Xrd Techniques ◽  
Co Precipitation ◽  
Triton X

Indium tin oxide (ITO) nanoparticles were synthesized by co-precipitation method using ammonia as a precipitator in absence/presence of various surfactants (LABS and Triton X-100). The synthesized nanoparticles were investigated by scanning electron microscopy, resistance measurement, photoluminescence (PL) spectroscopy and X-ray diffractometry (XRD) techniques. The XRD patterns of nanoparticles were also studied by Rietveld refinement method for calculation of crystallite size, micro-strain and lattice parameter. The results indicate that by application of LABS and Triton X-100 as surfactant the particle size was increased. Two luminescence bands were observed in PL spectra of ITO nanoparticles with the excitation energy lower than their band gaps. It was found that the ratios of luminescence bands have relation with resistances and colors of ITO nanoparticles. In addition, the band structure of ITO nanoparticles was described considering the obtained results.

scholarly journals Influence of pH and Temperature on The Structure and Size of Tin Oxide Nanoparticles

2018 ◽  
Vol 4 (5) ◽  
pp. 564-566
Author(s):  
I. Merlin ◽  
C. Vedhi ◽  
K. Muthu ◽  
A. Syed Mohamed
Keyword(s):  
Particle Size ◽  
Tin Oxide ◽  
Systematic Study ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Reaction Parameters ◽  
Temperature Changes ◽  
Xrd Studies ◽  
Tin Oxide Nanoparticles ◽  
Influence Of Ph

A systematic study on the preparation of tin oxide nanoparticles using the precipitation method has been conducted. The preparation of nanomaterials was by varying reaction parameters such as pH and temperature. The tin oxide nanoparticles were characterized by using AFM, SEM, XRD and UV-Vis. Particle size was obtained using XRD studies the value is 28.8 nm, 35.2 nm, 30.8 nm and 33.8 nm. It was found that the alteration of pH and temperature changes the particle size.

Structure and Optical Properties of Quantum Confined Pure and Cu Doped SnO2

2020 ◽  
Vol 1159 ◽  
pp. 60-66
Author(s):  
J.R. Sheeba ◽  
Sathasivam Radhika ◽  
C.M. Padma
Keyword(s):  
Band Gap ◽  
Tin Oxide ◽  
Optical Band Gap ◽  
Green Emission ◽  
Precipitation Method ◽  
Rutile Structure ◽  
Tetragonal Rutile Structure ◽  
Ft Ir ◽  
Tin Oxide Nanoparticles ◽  
Co Precipitation

Pure and copper doped tin oxide nanoparticles were synthesized by co-precipitation method and are characterized by XRD, SEM, EDAX, UV-Visible, photoluminescence, and FT-IR analysis techniques. Tetragonal rutile structure is confirmed from XRD and the crystallite size is found to be between 3.8nm and 4.8nm. The optical band gap is observed from UV-Vis spectrum and is found to be 3.99eV and 3.93eV for tin oxide and copper doped tin oxide respectively. The optical band gap of pure and Copper doped tin oxide were blue shifted due to quantum confinement. Photoluminescence spectrum shows UV, blue and green emission peaks.

Structural and optical studies of Pd doped tin oxide nanoparticles prepared by chemical co-precipitation method

2012 ◽  
Author(s):  
Brajesh Nandan ◽  
B. Venu Gopal ◽  
S. Amirthapandian ◽  
Sumita Santra ◽  
B. K. Panigrahi ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Optical Studies ◽  
Tin Oxide Nanoparticles ◽  
Co Precipitation
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