scholarly journals Vanadium Doping Effect on Multifunctionality of SnO2 Nanoparticles

2020 ◽  
Vol 9 (1) ◽  
pp. 38-45
Author(s):  
Roman Alvarez-Roca ◽  
Mariela Desimone ◽  
Mitchel G. S. Da Silva ◽  
Miguel A. Ponce ◽  
Elson Longo
Keyword(s):  
Tin Oxide ◽  
Sno2 Nanoparticles ◽  
Material Symmetry ◽  
Cell Parameters ◽  
Lattice Cell ◽  
Sensing Material ◽  
Dopant Level ◽  
Vanadium Doping ◽  
Sensing Characteristics ◽  
Xrd And Tem

 In the present study, tin oxide (SnO2) nanoparticles were synthesized by a precursor polymeric method. The obtained nanoparticles were doped with vanadium. The samples were characterized by powder XRD, TEM, optical UV and EPR studies. XRD and TEM showed the rutile crystal structure and its revealed that the lattice cell parameters and particles size were decreased with dopant level. Optical and EPR data confirmed that the doped V enters into SnO2 and distorted the host material symmetry. The films sensing characteristics have been studied from the aspect of doping level of sensing material and microstructure. It is found that V doping on SnO2 enhance sensor sensitivity towards CO gas. The results demonstrated that V doping can improving numerous applications which the SnO2 response is maximized.

scholarly journals Energetic-Materials-Driven Synthesis of Graphene-Encapsulated Tin Oxide Nanoparticles for Sodium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2550
Author(s):  
Yingchun Wang ◽  
Jinxu Liu ◽  
Min Yang ◽  
Lijuan Hou ◽  
Tingting Xu ◽  
...  
Keyword(s):  
Tin Oxide ◽  
Energetic Materials ◽  
High Speed ◽  
Coulombic Efficiency ◽  
Sno2 Nanoparticles ◽  
Direct Synthesis ◽  
Exothermic Reaction ◽  
Rate Capability ◽  
Rapid Expansion ◽  
Core Shell

By evenly mixing polytetrafluoroethylene-silicon energetic materials (PTFE-Si EMs) with tin oxide (SnO2) particles, we demonstrate a direct synthesis of graphene-encapsulated SnO2 (Gr-SnO2) nanoparticles through the self-propagated exothermic reaction of the EMs. The highly exothermic reaction of the PTFE-Si EMs released a huge amount of heat that induced an instantaneous temperature rise at the reaction zone, and the rapid expansion of the gaseous SiF4 product provided a high-speed gas flow for dispersing the molten particles into finer nanoscale particles. Furthermore, the reaction of the PTFE-NPs with Si resulted in a simultaneous synthesis of graphene that encapsulated the SnO2 nanoparticles in order to form the core-shell nanostructure. As sodium storage material, the graphene-encapsulated SnO2 nanoparticles exhibit a good cycling performance, superior rate capability, and a high initial Coulombic efficiency of 85.3%. This proves the effectiveness of our approach for the scalable synthesis of core-shell-structured graphene-encapsulated nanomaterials.

scholarly journals Transforming Pt-SnO2 Nanoparticles into Pt-SnO2 Composite Nanoceramics for Room-Temperature Hydrogen-Sensing Applications

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2123
Author(s):  
Ming Liu ◽  
Caochuang Wang ◽  
Pengcheng Li ◽  
Liang Cheng ◽  
Yongming Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Sintering Temperature ◽  
Sno2 Nanoparticles ◽  
Hydrogen Sensing ◽  
Sensing Applications ◽  
Nanostructured Metal Oxides ◽  
Low Dimensional ◽  
Sensing Characteristics ◽  
Nanostructured Metal

Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2 nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2 grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2 at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.

Study of Thin Film Tin Oxide for Reliability as Gas Sensing Material

2020 ◽  
Author(s):  
Ravi Shankar ◽  
Tien Choy Loh ◽  
Le Khaing Le ◽  
Chun Wei Khor ◽  
Shian Yeu Kam ◽  
...  
Keyword(s):  
Thin Film ◽  
Tin Oxide ◽  
Gas Sensing ◽  
Sensing Material

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.

Role of different chelating agent in synthesis of copper doped tin oxide (Cu-SnO2) nanoparticles

2018 ◽  
Author(s):  
B. Saravanakumar ◽  
A. Anusiya ◽  
B. Jansi Rani ◽  
G. Ravi ◽  
R. Yuvakkumar
Keyword(s):  
Tin Oxide ◽  
Sno2 Nanoparticles ◽  
Chelating Agent

scholarly journals Sb-SnO2-Nanosized-Based Resistive Sensors for NO2Detection

2009 ◽  
Vol 2009 ◽  
pp. 1-7 ◽  
Author(s):  
T. Krishnakumar ◽  
R. Jayaprakash ◽  
N. Pinna ◽  
A. Donato ◽  
N. Donato ◽  
...  
Keyword(s):  
Water Vapor ◽  
Thick Film ◽  
Tin Oxide ◽  
Chemical Methods ◽  
Trace Level ◽  
Sensing Applications ◽  
Wet Chemical ◽  
Sensing Characteristics

A study over Sb-promoted tin oxide nanopowders for sensing applications is reported. nanopowders pure and promoted with 5 wt% of antimony were prepared by wet chemical methods and widely characterized by TEM, XRD, and XPS techniques. Thick film resistive sensors were fabricated by depositing the synthesized nanopowders by drop-coating on interdigited alumina substrates. The sensing characteristics of the pure and Sb-promoted sensors for the monitoring of trace level of were studied. The response of the sensors to water vapor was also investigated, revealing that Sb acts favorably eliminating the interference of humidity.

Time-dependent oxygen vacancy distribution and gas sensing characteristics of tin oxide gas sensitive thin films

2010 ◽  
Vol 150 (1) ◽  
pp. 330-338 ◽  
Author(s):  
Jianqiao Liu ◽  
Shuping Gong ◽  
Qiuyun Fu ◽  
Yi Wang ◽  
Lin Quan ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Vacancy ◽  
Tin Oxide ◽  
Gas Sensing ◽  
Time Dependent ◽  
Vacancy Distribution ◽  
Sensing Characteristics
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