Metal-Oxide Nanoparticles with a Dopant-Segregation-Induced Core–Shell Structure: Gas Sensing Properties

2018 ◽  
Vol 122 (37) ◽  
pp. 21322-21329 ◽  
Author(s):  
Jiansong Miao ◽  
Chuan Chen ◽  
Y. S. Lin
Keyword(s):  
Metal Oxide ◽  
Shell Structure ◽  
Gas Sensing ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Core Shell ◽  
Dopant Segregation ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Core Shell Structure

Formation of SiO2@SnO2 core–shell nanofibers and their gas sensing properties

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 13371-13376 ◽  
Author(s):  
Yunshi Liu ◽  
Ping Yang ◽  
Jia Li ◽  
Katarzyna Matras-Postolek ◽  
Yunlong Yue ◽  
...  
Keyword(s):  
Shell Structure ◽  
Gas Sensing ◽  
Core Shell ◽  
Calcination Process ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Subsequent Calcination ◽  
Core Shell Structure ◽  
Sensing Performance

SiO2@SnO2 core–shell nanofibers were prepared by a single-spinneret electrospinning route and subsequent calcination process. Both the ratio of Sn and Si and the special core–shell structure played significant roles in gas sensing performance.

scholarly journals Co3O4/Al-ZnO Nano-composites: Gas Sensing Properties

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 760 ◽  
Author(s):  
Ada Fort ◽  
Enza Panzardi ◽  
Valerio Vignoli ◽  
Mokhtar Hjiri ◽  
Mohamed Aida ◽  
...  
Keyword(s):  
Composite Materials ◽  
Metal Oxide ◽  
Gas Sensing ◽  
Low Cost ◽  
Metal Oxide Nanoparticles ◽  
Electronic Conductivity ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Powder Composites ◽  
P Type

In this paper, the gas sensing properties of metal oxide nano-powder composites are studied and modeled. The gas sensing properties of mixtures of two different metal oxide nanoparticles, prepared via low-cost routes, are investigated. The responses to both an oxidizing (NO2) and a reducing gas (CO) are analyzed. The tested composites are obtained by mixing a different percentage of a p-type metal oxide, Co3O4, with moderate responses to NO2 at about 200 °C and to CO at high temperature (above 260 °C), with n-type Al-doped ZnO, which is characterized by a large but unstable response towards NO2 around 160 °C and a moderate response towards CO around 200 °C. In the oxides mixtures, p-n heterojunctions are formed by the juxtaposition of an n-type and a p-type grain in contact. Consequently, the electronic conductivity is modified and the obtained composite materials show novel characteristics with respect to the base materials. This indicates that predicting the behavior of the composites from those of their components is not possible and it suggests that the hetero-junction behavior has to be studied to understand the sensing properties of the composite materials. The obtained results indicate that the composites containing a significant amount of hetero-junctions exhibit a stable response to NO2 at room temperature and significant responses towards CO at 160 °C.

The effect of shell thickness on gas sensing properties of core-shell fibers

2021 ◽  
Vol 332 ◽  
pp. 129456
Author(s):  
Ming Zhang ◽  
Ning Sui ◽  
Rui Wang ◽  
Tong Zhang
Keyword(s):  
Shell Thickness ◽  
Gas Sensing ◽  
Core Shell ◽  
Sensing Properties ◽  
Gas Sensing Properties

Investigation on Gas Sensing Properties and SVM Training of Perovskite Metal Oxide LaFeO3 Microsphere

2020 ◽  
Vol MA2020-01 (28) ◽  
pp. 2066-2066
Author(s):  
Fanli Meng ◽  
Wenbo Qin ◽  
Hua Zhang ◽  
Zhenyu Yuan
Keyword(s):  
Metal Oxide ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties

A mesoporous Ni3N/NiO composite with a core–shell structure for room temperature, selective and sensitive NO2 gas sensing

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 42917-42922 ◽  
Author(s):  
Mingming Zou ◽  
Hu Meng ◽  
Fengdong Qu ◽  
Liang Feng ◽  
Minghui Yang
Keyword(s):  
Shell Structure ◽  
Room Temperature ◽  
Gas Sensing ◽  
Core Shell ◽  
Template Free ◽  
Core Shell Structure

Mesoporous Ni3N/NiO composites with core–shell structure were synthesized by a template free method, demonstrate a significant improvements both in sensitivity and in selectivity for NO2 gas sensing at room temperature.

Bio-green synthesis of Ni-doped tin oxide nanoparticles and its influence on gas sensing properties

RSC Advances ◽  
2015 ◽  
Vol 5 (89) ◽  
pp. 72849-72856 ◽  
Author(s):  
Ketan P. Gattu ◽  
Kalyani Ghule ◽  
Anil A. Kashale ◽  
V. B. Patil ◽  
D. M. Phase ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Tin Oxide ◽  
Gas Sensing ◽  
Low Cost ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Oxide Nanoparticles ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Tin Oxide Nanoparticles

Using a novel, cost-effective and environmentally friendly biosynthesis method, Ni-doped SnO2 nanoparticles have been synthesized. Gas sensing results suggest that the Ni-dopant is a promising additive to fabricate low cost SnO2 based sensors.

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