Flower-like In2O3 hierarchical nanostructures: synthesis, characterization, and gas sensing properties

RSC Advances ◽  
2014 ◽  
Vol 4 (91) ◽  
pp. 50241-50248 ◽  
Author(s):  
Dan Han ◽  
Peng Song ◽  
Huihui Zhang ◽  
Huihui Yan ◽  
Qi Xu ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Gas Sensing ◽  
Hierarchical Nanostructures ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
One Step ◽  
Ethanol Sensing ◽  
Sensing Performance

Flower-like In2O3 nanostructures with superior ethanol sensing performance were synthesized by annealing In(OH)3 precursor prepared via a one-step hydrothermal method.

Room temperature ethanol gas-sensing properties based on Ag-doped MoSe2 nanoflowers: experimental and DFT investigation

2021 ◽  
Author(s):  
Tingting Li ◽  
Sujing Yu ◽  
Qi Li ◽  
Minghe Chi ◽  
Peng Li
Keyword(s):  
Hydrothermal Method ◽  
High Purity ◽  
Room Temperature ◽  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Ethanol Sensing

An Ag-doped MoSe2 nanomaterial-based sensor was fabricated for ppb-level ethanol sensing at room temperature. The MoSe2 and Ag-modified MoSe2 nano-flowers were synthesized by a hydrothermal method, which exhibited high purity...

NH3 Sensing Performance of Pt-Doped WO3·0.33H2O Microshuttles Induced From Scheelite Leaching Solution

2020 ◽  
Author(s):  
Tingting Li ◽  
Pengfei Zhou ◽  
Sikai Zhao ◽  
Cong Han ◽  
Dezhou Wei ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Hexagonal Structure ◽  
Raw Material ◽  
Noble Metal Nanoparticles ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Leaching Solution ◽  
One Step ◽  
Sensing Performance ◽  
Operating Temperature Range

Abstract WO3·0.33H2O microshuttles (WMSs) self-assembled by numerous nanorods along the same direction were prepared based on a cheap tungsten-containing metallurgical raw material by combination processes of NaOH leaching and one-step hydrothermal method. The microstructures and gas sensing properties of various concentrations (0, 0.7, 1.0, and 1.3 mol%) of Pt-doped WMSs were investigated to improve their performance. The microstructural characterizations demonstrated that the WMSs assembled by one-dimensional WO3·0.33H2O nanorods were approximately 0.8−1.9 µm in diameter. Such nanorods exhibited a single hexagonal structure with their diameters ranging from 17 to 62 nm. The gas sensing properties indicated that Pt-doped WMSs showed superior gas sensing performance in terms of the sensor response and NH3 selectivity in the operating temperature range of 25−225 oC as compared with pure one, and simultaneously Pt doping could significantly reduce the detection limit of NH3. Especially, 1.0 mol% Pt-doped WMSs exhibited highest response of 28.2 to 1000 ppm NH3 at 175 oC, which was 4 times higher than pure one at 50 oC. The remarkably enhanced gas sensing performance of Pt-doped WMSs to NH3 could be ascribed to the electronic and chemical sensitization mechanisms of noble metal nanoparticles.

Self-assembly fabrication of 3D flower-like ZnO hierarchical nanostructures and their gas sensing properties

CrystEngComm ◽  
2012 ◽  
Vol 14 (5) ◽  
pp. 1775 ◽  
Author(s):  
Haijiao Zhang ◽  
Ruofei Wu ◽  
Zhiwen Chen ◽  
Gang Liu ◽  
Zongnan Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Gas Sensing ◽  
Hierarchical Nanostructures ◽  
Sensing Properties ◽  
Gas Sensing Properties

One step synthesis of branched SnO2/ZnO heterostructures and their enhanced gas-sensing properties

2019 ◽  
Vol 281 ◽  
pp. 415-423 ◽  
Author(s):  
Xueli Yang ◽  
Sufang Zhang ◽  
Qi yu ◽  
Liupeng Zhao ◽  
Peng Sun ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
One Step

Optimization and gas sensing properties of Au nanoparticle modified α-Fe2O3 nanodisk structures for highly sensitive acetone detection

2020 ◽  
Vol 44 (37) ◽  
pp. 16174-16184
Author(s):  
Haoyue Yang ◽  
Rui Zhou ◽  
Yongjiao Sun ◽  
Pengwei Li ◽  
Wendong Zhang ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Hydrothermal Method ◽  
Gas Sensing ◽  
Au Nanoparticle ◽  
Facile Hydrothermal Method ◽  
Sensing Properties ◽  
Highly Sensitive ◽  
Gas Sensing Properties ◽  
Acetone Detection

Au nanoparticle (Au NP) modified α-Fe2O3 nanodisk structures are obtained using a facile hydrothermal method and annealing based surface treatment.

Excellent Gas Sensing of CdS Nanowires Decorated with Ag Nanoparticles

2019 ◽  
Vol 19 (11) ◽  
pp. 7083-7088 ◽  
Author(s):  
Nan Zhang ◽  
Xiaohui Ma ◽  
Shengping Ruan ◽  
Yanyang Yin ◽  
Chuannan Li ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Ag Nanoparticles ◽  
Gas Sensing ◽  
Average Diameter ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Cds Nanowires ◽  
The Stability ◽  
Ethanol Sensing ◽  
The One

In this study, CdS nanowires (NWs)/Ag nanoparticle materials (CdS@Ag) with Schottky junction were synthesized by a simple process. The Ag nanoparticles with a diameter of 3–10 nm were uniformly scattered on the surface of CdS NWs with an average diameter of 30 nm. The gas sensing properties and the effect of Ag content and relative humidity on the ethanol sensing properties of CdS NWs were investigated in detail. When the relative humidity was below 60% RH, the sensor, especially the one based on [email protected], exhibited an enhanced ethanol sensing response and selectivity compared with that of pristine CdS NWs, which was believed that Ag catalyzed the reaction between ionized oxygen species and ethanol. However, excessive Ag content does not mean a higher response and even decreased the response. Also, the stability of CdS NWs and CdS@Ag NWs was also investigated, which were almost stable for four months.

Synthesis of Hierarchical Hetero-Junction Composite and Gas Detection Performance in Asphalt Road

2020 ◽  
Vol 15 (4) ◽  
pp. 516-522
Author(s):  
Ruisheng Feng ◽  
Yuchao Xia
Keyword(s):  
Hydrothermal Method ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Hierarchical Structures ◽  
Gas Detection ◽  
Surface Accessibility ◽  
Sensing Properties ◽  
Asphalt Road ◽  
One Step ◽  
Nio Nanosheets

In this work, we have triumphantly synthesized porous nanosheet-assembled ZnO/NiO hierarchical microflower via a one-step hydrothermal method. On this basis, a corresponding gas sensor was fabricated to detect its sensitivity to H2S gas. The results indicated that porous flower-like hierarchical structures hold favorable superiority in the gas sensing towards H2S as compared to ZnO/NiO nanosheets. The superior sensing behavior may correlate with the special architecture offering abundant reaction sites, rapid channels and surface accessibility for gas transportation. Besides, p–n heterojunction at their interface and strong catalysis of NiO also play an important role in the enhancement of sensing properties.

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