Quantitative analysis of the synergistic effect of Au nanoparticles on SnO2–rGO nanocomposites for room temperature hydrogen sensing

2021 ◽  
Vol 23 (3) ◽  
pp. 2377-2383
Author(s):  
Yale Wang ◽  
Haihui Pu ◽  
Ganhua Lu ◽  
Xiaoyu Sui ◽  
Junhong Chen

The accelerating effect of gold additives on hydrogen sensing was quantitatively studied through Arrhenius analysis.

2021 ◽  
Vol 332 ◽  
pp. 129493
Author(s):  
Jae-Hun Kim ◽  
Jin-Young Kim ◽  
Ali Mirzaei ◽  
Hyoun Woo Kim ◽  
Sang Sub Kim

Author(s):  
Hien Duy Mai ◽  
Sangmin Jeong ◽  
Tri Khoa Nguyen ◽  
Jong-Sang Youn ◽  
Seungbae Ahn ◽  
...  

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2123
Author(s):  
Ming Liu ◽  
Caochuang Wang ◽  
Pengcheng Li ◽  
Liang Cheng ◽  
Yongming Hu ◽  
...  

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.


2019 ◽  
Vol 7 (16) ◽  
pp. 4817-4821 ◽  
Author(s):  
U. Sandhya Shenoy ◽  
D. Krishna Bhat

Resonance states due to Bi and In co-doping, band gap enlargement, and a reduced valence-band offset in SnTe lead to a record high room-temperature ZT.


Nanoscale ◽  
2021 ◽  
Author(s):  
Soon-Hwan Kwon ◽  
Tae-Hyeon Kim ◽  
Sang-Min Kim ◽  
Semi Oh ◽  
Kyoung-Kook Kim

Nanostructured semiconducting metal oxides such as SnO2, ZnO, TiO2, and CuO have been widely used to fabricate high performance gas sensors. To improve the sensitivity and stability of gas sensors,...


2018 ◽  
Vol 33 (7) ◽  
pp. 1184-1195 ◽  
Author(s):  
Jianhong Yang ◽  
Xiaomeng Li ◽  
Huili Lu ◽  
Jinwu Xu ◽  
Haixia Li

Information learnt from spectra at room temperature is transferred to assist in building a better regression model at high temperature.


2018 ◽  
Vol 34 (10) ◽  
pp. 1765-1772 ◽  
Author(s):  
Ling Wang ◽  
Yiquan Zhao ◽  
Jing Zhang ◽  
Ru Ma ◽  
Yandong Liu ◽  
...  

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