scholarly journals Study of Gas-Sensing Properties of Titania Nanotubes for Health and Safety Applications

2021 ◽  
Vol 5 (1) ◽  
pp. 16
Author(s):  
Vardan Galstyan ◽  
Nicola Poli ◽  
Elisabetta Comini
Keyword(s):  
Gas Sensing ◽  
Health And Safety ◽  
Hybrid Structure ◽  
Titania Nanotubes ◽  
Sensing Properties ◽  
Hybrid Nanomaterial ◽  
Graphene Derivatives ◽  
Gas Sensing Properties ◽  
Experimental Findings ◽  
Safety Applications

We studied the preparation and gas-sensing performance of a hybrid nanomaterial based on titania nanotubes and graphene derivatives. We fabricated the hybrid structure with tunable chemical-sensing properties, achieved by tailoring the structure and composition of graphene oxide and coupling it with titania nanotubes. The parameters of manufactured sensing structures were investigated for hydrogen and ammonia. Our experimental findings indicate that this research may demonstrate an efficient way to enhance the gas-sensing properties of metal oxide nanomaterials for health and safety applications.

scholarly journals A Reduced GO-Graphene Hybrid Gas Sensor for Ultra-Low Concentration Ammonia Detection

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3147 ◽  
Author(s):  
Chang Wang ◽  
Shaochong Lei ◽  
Xin Li ◽  
Shixi Guo ◽  
Ping Cui ◽  
...  
Keyword(s):  
Gas Sensor ◽  
Gas Sensing ◽  
Ammonia Concentration ◽  
Hybrid Structure ◽  
Pristine Graphene ◽  
Sensing Properties ◽  
Low Concentration ◽  
Reduction Time ◽  
Gas Sensing Properties ◽  
Ammonia Detection

A hybrid structure gas sensor of reduced graphene oxide (RGO) decorated graphene (RGO-Gr) is designed for ultra-low concentration ammonia detection. The resistance value of the RGO-Gr hybrid is the indicator of the ammonia concentration and controlled by effective charge transport from RGO to graphene after ammonia molecule adsorption. In this hybrid material, RGO is the adsorbing layer to catch ammonia molecules and graphene is the conductive layer to effectively enhance charge/electron transport. Compared to a RGO gas sensor, the signal-to-noise ratio (SNR) of the RGO-Gr is increased from 22 to 1008. Meanwhile, the response of the RGO-Gr gas sensor is better than that of either a pristine graphene or RGO gas sensor. It is found that the RGO reduction time is related to the content of functional groups that directly reflect on the gas sensing properties of the sensor. The RGO-Gr gas sensor with 10 min reduction time has the best gas sensing properties in this type of sensor. The highest sensitivity is 2.88% towards 0.5 ppm, and the ammonia gas detection limit is calculated to be 36 ppb.

Preparation of One-dimensional Pt/SnO2 Nanofibers and NOx Gas-sensing Properties

2013 ◽  
Vol 28 (6) ◽  
pp. 584-588 ◽  
Author(s):  
Shuang XU ◽  
Ying YANG ◽  
Hong-Yuan WU ◽  
Chao JIANG ◽  
Li-Qiang JING ◽  
...  
Keyword(s):  
Gas Sensing ◽  
One Dimensional ◽  
Sensing Properties ◽  
Gas Sensing Properties

Controllable biomolecule-assisted synthesis and gas sensing properties of In 2 O 3 micro/nanostructures with double phases

2017 ◽  
Vol 239 ◽  
pp. 270-278 ◽  
Author(s):  
Wenhui Zhang ◽  
Wenchao Zhang ◽  
Bin Chen ◽  
Rong Shao ◽  
Rongfeng Guan ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sensing Properties ◽  
Gas Sensing Properties
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