One-step synthesis of flower-shaped WO3 nanostructures for a high-sensitivity room-temperature NOx gas sensor

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106880-106886 ◽  
Author(s):  
Wencheng Fang ◽  
Ying Yang ◽  
Hui Yu ◽  
Xiangting Dong ◽  
Tingting Wang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Room Temperature ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Facile Hydrothermal Method ◽  
Short Response Time ◽  
One Step ◽  
Wo3 Nanostructures ◽  
Nox Gas Sensor ◽  
Sensing Performance

Flower-shaped WO3 nanoparticles were successfully synthesized by using a facile hydrothermal method. These particles exhibited excellent room-temperature NOx gas-sensing performance with high sensitivity, short response time and low detection limit.

Fe3O4/rGO nanocomposite: synthesis and enhanced NOxgas-sensing properties at room temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 37085-37092 ◽  
Author(s):  
Ying Yang ◽  
Li Sun ◽  
Xiangting Dong ◽  
Hui Yu ◽  
Tingting Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Detection Limit ◽  
Response Time ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Short Response Time ◽  
Reduced Graphene ◽  
Sensing Performance

Fe3O4nanoparticles-decorated reduced graphene oxide nanocomposites have been successfully synthesized using solvothermal-pyrolytic method. They have superior gas sensing performance with low detection limit, high sensitivity and short response time.

Mesoporous In2O3 nanocrystals: synthesis, characterization and NOx gas sensor at room temperature

2016 ◽  
Vol 40 (2) ◽  
pp. 1306-1311 ◽  
Author(s):  
Jun Gao ◽  
Hongyuan Wu ◽  
Jiao Zhou ◽  
Liyuan Yao ◽  
Guo Zhang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Gas Sensor ◽  
Room Temperature ◽  
Low Detection Limit ◽  
Nox Gas Sensor ◽  
Sensing Performance

Highly mesoporous In2O3 nanocrystals exhibit excellent sensing performance toward NOx, with a low detection limit of 970 ppb at room temperature.

One-step synthesis of mesoporous Al2O3–In2O3nanofibres with remarkable gas-sensing performance to NOxat room temperature

2014 ◽  
Vol 2 (4) ◽  
pp. 949-956 ◽  
Author(s):  
Jun Gao ◽  
Linlin Wang ◽  
Kan Kan ◽  
Shuang Xu ◽  
Liqiang jing ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
One Step ◽  
Sensing Performance

scholarly journals Construction of MoO3/MoSe2 nanocomposite based gas sensor for low detection limit trimethylamine sensing at room temperature

2021 ◽  
Author(s):  
Lanjuan Zhou ◽  
Qian Mi ◽  
Yingbo Jin ◽  
Tingting Li ◽  
Dongzhi Zhang
Keyword(s):  
Detection Limit ◽  
Gas Sensor ◽  
Room Temperature ◽  
Gas Sensing ◽  
Microstructural Characterization ◽  
Honeycomb Structure ◽  
Gas Sensitivity ◽  
Characterization Methods ◽  
Low Detection Limit ◽  
Sensing Performance

Abstract In this paper, MoO3/MoSe2 n-n heterostructure was constructed for fabricating trimethylamine (TMA) gas sensor by an improved hydrothermal and spin-coating method. The surface morphology and microstructure of the prepared materials were analyzed by XRD, XPS, SEM and TEM characterization methods. The microstructural characterization results demonstrated that the MoO3/MoSe2 heterostructure had been successfully synthesized, in which the MoSe2 had a flower-shaped structure, and MoO3 had a rod-shaped structure. At the same time, the MoSe2 surface exhibited periodic honeycomb structure. The gas-sensitivity experimental results showed that the proposed MoO3/MoSe2 sensor had excellent TMA sensing performance at room temperature, including high response capability, low detection limit (20 ppb), short response/recovery time (12 s/19 s), long-term stability, good repeatability and outstanding selectivity. The heterostructure of MoO3/MoSe2 had made outstanding contributions to the enhanced TMA gas sensing performance at room temperature.

scholarly journals Study on room temperature gas-sensing performance of CuO film-decorated ordered porous ZnO composite by In 2 O 3 sensitization

2018 ◽  
Vol 5 (2) ◽  
pp. 171788 ◽  
Author(s):  
Tian-tian Li ◽  
Na Bao ◽  
Ai-fang Geng ◽  
Hui Yu ◽  
Ying Yang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Copper Film ◽  
High Sensitivity ◽  
Minimum Concentration ◽  
Temperature Oxidation ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Ordered Porous ◽  
Sensing Performance

For the first time, ordered mesoporous ZnO nanoparticles have been synthesized by a template method. The electroplating after chemical plating method was creatively used to form copper film on the surface of the prepared ZnO, and then a CuO film-decorated ordered porous ZnO composite (CuO/ZnO) was obtained by a high-temperature oxidation method. In 2 O 3 was loaded into the prepared CuO film–ZnO by an ultrasonic-assisted method to sensitize the room temperature gas-sensing performance of the prepared CuO/ZnO materials. The doped In 2 O 3 could effectively improve the gas-sensing properties of the prepared materials to nitrogen oxides (NO x ) at room temperature. The 1% In 2 O 3 doped CuO/ZnO sample (1 wt% In 2 O 3 –CuO/ZnO) showed the best gas-sensing properties whose response to 100 ppm NO x reached 82%, and the detectable minimum concentration reached 1 ppm at room temperature. The prepared materials had a good selectivity, better response, very low detection limit, and high sensitivity to NO x gas at room temperature, which would have a great development space in the gas sensor field and a great research value.

scholarly journals A p-n Heterojunction Based Pd/PdO@ZnO Organic Frameworks for High-Sensitivity Room-Temperature Formaldehyde Gas Sensor

2021 ◽  
Vol 9 ◽  
Author(s):  
Faheem Ullah Khan ◽  
Shahid Mehmood ◽  
Shiliang Liu ◽  
Wei Xu ◽  
Muhammad Naeem Shah ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Room Temperature ◽  
Gas Sensing ◽  
Metal Organic Framework ◽  
Organic Pollutant ◽  
High Surface ◽  
High Surface Area ◽  
High Sensitivity ◽  
Zno Nanomaterials ◽  
Sensing Performance

As formaldehyde is an extremely toxic volatile organic pollutant, a highly sensitive and selective gas sensor for low-concentration formaldehyde monitoring is of great importance. Herein, metal-organic framework (MOF) derived Pd/PdO@ZnO porous nanostructures were synthesized through hydrothermal method followed by calcination processes. Specifically, porous Pd/PdO@ZnO nanomaterials with large surfaces were synthesized using MOFs as sacrificial templates. During the calcination procedure, an optimized temperature of 500°C was used to form a stable structure. More importantly, intensive PdO@ZnO inside the material and composite interface provides lots of p-n heterojunction to efficiently manipulate room temperature sensing performance. As the height of the energy barrier at the junction of PdO@ZnO exponentially influences the sensor resistance, the Pd/PdO@ZnO nanomaterials exhibit high sensitivity (38.57% for 100 ppm) at room temperature for 1-ppm formaldehyde with satisfactory selectivity towards (ammonia, acetone, methanol, and IPA). Besides, due to the catalytic effect of Pd and PdO, the adsorption and desorption of the gas molecules are accelerated, and the response and recovery time is as small as 256 and 264 s, respectively. Therefore, this MOF-driven strategy can prepare metal oxide composites with high surface area, well-defined morphology, and satisfactory room-temperature formaldehyde gas sensing performance for indoor air quality control.

Preparation of Polyaniline/Cu-BTC Composite and its Sensing Application for Ammonia

2017 ◽  
Vol 748 ◽  
pp. 353-357
Author(s):  
Yong Jin Zou ◽  
Ying Yin ◽  
Hai Tao Zhang ◽  
Fen Xu ◽  
Li Xian Sun
Keyword(s):  
Surface Area ◽  
Room Temperature ◽  
Gas Sensing ◽  
High Surface ◽  
Hydrothermal Process ◽  
High Surface Area ◽  
High Sensitivity ◽  
Pani Composite ◽  
Sensing Application ◽  
Sensing Performance

In this study, a newly materials based on copper–benzene-1,3,5-tricarboxylate/polyaniline (PANI/Cu-BTC) composite was investigated for NH3 sensing. Cu-BTC was grown on the PANI a hydrothermal process. The sensing performance of as-grown product was studied for different concentrations of NH3 at room temperature. The results reveal that Cu-BTC/PANI composite exhibit high sensitivity toward NH3. The good sensing performance of the composite was attributed to high surface area and good affinity of Cu-BTC for NH3, which can act like preconcentrator for the NH3 gas sensing.

Co3O4@PEI/Ti3C2Tx MXene nanocomposites for a highly sensitive NOx gas sensor with a low detection limit

2021 ◽  
Author(s):  
Baihe Sun ◽  
He Lv ◽  
Zhuo Liu ◽  
Jue Wang ◽  
Xue Bai ◽  
...  
Keyword(s):  
Detection Limit ◽  
Nitrogen Oxides ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Adsorption Property ◽  
Sensor Material ◽  
Low Detection Limit ◽  
Highly Sensitive ◽  
Nox Gas Sensor ◽  
Sensing Performance

The CoPM-24 gas sensor material showed an excellent gas sensing performance to nitrogen oxides, that mainly attributed to their excellent adsorption property and unique heterostructure.

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