Pt Nanoparticles Sensitized Ordered Mesoporous WO 3 Semiconductor: Gas Sensing Performance and Mechanism Study

2017 ◽  
Vol 28 (6) ◽  
pp. 1705268 ◽  
Author(s):  
Junhao Ma ◽  
Yuan Ren ◽  
Xinran Zhou ◽  
Liangliang Liu ◽  
Yongheng Zhu ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Mechanism Study ◽  
Ordered Mesoporous ◽  
Performance And Mechanism ◽  
Sensing Performance

Enhanced Gas-Sensing Performance of Fe-Doped Ordered Mesoporous NiO with Long-Range Periodicity

2015 ◽  
Vol 119 (6) ◽  
pp. 3228-3237 ◽  
Author(s):  
Xiaohong Sun ◽  
Xudong Hu ◽  
Yongchao Wang ◽  
Rui Xiong ◽  
Xin Li ◽  
...  
Keyword(s):  
Long Range ◽  
Gas Sensing ◽  
Ordered Mesoporous ◽  
Sensing Performance

scholarly journals Gas Sensing Performance and Mechanism of CuO(p)-WO3(n) Composites to H2S Gas

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1162
Author(s):  
Fang Peng ◽  
Yan Sun ◽  
Weiwei Yu ◽  
Yue Lu ◽  
Jiaming Hao ◽  
...  
Keyword(s):  
Tungsten Trioxide ◽  
Gas Sensing ◽  
Molar Ratio ◽  
Total Response ◽  
Raman Analysis ◽  
P Type ◽  
Type Response ◽  
Performance And Mechanism ◽  
Sensing Performance ◽  
Response Transformation

In this work, the compositional optimization in copper oxide/tungsten trioxide (CuO/WO3) composites was systematically studied for hydrogen sulfide (H2S) sensing. The response of CuO/WO3 composites changes from p-type to n-type as the CuO content decreases. Furthermore, the p-type response weakens while the n-type response strengthens as the Cu/W molar ratio decreases from 1:0 to 1:10. The optimal Cu/W molar ratio is 1:10, at which the sensor presents the ultrahigh n-type response of 1.19 × 105 to 20 ppm H2S gas at 40 °C. Once the temperature rises from 40 °C to 250 °C, the CuO/WO3 (1:1) sensor presents the p-n response transformation, and the CuO/WO3 (1:1.5) sensor changes from no response to n-type response, because the increased temperature facilitates the Cu-S bonds break and weakens the p-type CuO contribution to the total response, such that the CuS bond decomposition by a thermal effect was verified by a Raman analysis. In addition, with a decrease in CuO content, the CuO is transformed from partly to completely converting to CuS, causing the resistance of CuO to decrease from increasing and, hence, a weakening mode of p-CuO and n-WO3 to the total response turns to a synergistic mode to it.

Rational Synthesis and Gas Sensing Performance of Ordered Mesoporous Semiconducting WO3/NiO Composites

2019 ◽  
Vol 11 (29) ◽  
pp. 26268-26276 ◽  
Author(s):  
Xingyu Xiao ◽  
Xinran Zhou ◽  
Junhao Ma ◽  
Yongheng Zhu ◽  
Xiaowei Cheng ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Ordered Mesoporous ◽  
Sensing Performance

scholarly journals Mesoporous titanium niobium nitrides supported Pt nanoparticles for highly selective and sensitive detection of formaldehyde

2021 ◽  
Author(s):  
Chaozhu Huang ◽  
Samira Adimi ◽  
Dongliang Liu ◽  
Haichuan Guo ◽  
Tiju Thomas ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Gas Sensing ◽  
Pt Nanoparticles ◽  
Proton Exchange ◽  
The Poor ◽  
Supported Platinum ◽  
Commercial Carbon ◽  
Niobium Nitrides ◽  
Exchange Membrane ◽  
Gas Sensing Device

Proton exchange membrane fuel cell gas sensor is a promising and novel gas sensing device. However, the poor sensitivity and strong cross sensitivity of commercial carbon-supported-platinum (Pt/C) remain obstacles to...

Improved sensing performance of WO3 nanoparticles decorated with Ag and Pt nanoparticles

Rare Metals ◽  
2021 ◽  
Author(s):  
Dong-Liang Feng ◽  
Zheng-You Zhu ◽  
Ling-Ling Du ◽  
Xia-Xia Xing ◽  
Chen Wang ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Sensing Performance
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