Noble Metal Decorated Graphene-Based Gas Sensors and Their Fabrication: A Review

Methane is an important gas for domestic and industrial applications and its source is mainly coalmines. Since methane is extremely inflammable in the coalmine atmosphere, it is essential to develop a reliable and relatively inexpensive chemical gas sensor to detect this inflammable gas below its explosion amount in air. The metal oxides have been proved to be potential materials for the development of commercial gas sensors. The functional properties of the metal oxide-based gas sensors can be improved not only by tailoring the crystal size of metal oxides but also by incorporating the noble metal catalyst on nanocrystalline metal oxide matrix. It was observed that the surface modification of nanocrystalline metal oxide thin films by noble metal sensitizers and the use of a noble metal catalytic contact as electrode reduce the operating temperatures appreciably and improve the sensing properties. This review article concentrates on the nanocrystalline metal oxide methane sensors and the role of noble metals on the sensing properties.

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The uptake of oxygen by noble metal clusters on gas sensors

Sensors and Actuators B Chemical ◽

10.1016/0925-4005(92)80204-b ◽

1992 ◽

Vol 9 (2) ◽

pp. 123-125 ◽

Cited By ~ 5

Author(s):

G. Hoogers ◽

R. Huck ◽

D. Kohl ◽

G. Heiland

Keyword(s):

Noble Metal ◽

Gas Sensors ◽

Metal Clusters

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Gas sensors for air quality monitoring: realisation and characterisation of undoped and noble metal-doped SnO2 thin sensing films deposited by the pulsed laser ablation

Sensors and Actuators B Chemical ◽

10.1016/s0925-4005(99)00261-0 ◽

1999 ◽

Vol 60 (2-3) ◽

pp. 90-96 ◽

Cited By ~ 40

Author(s):

S Nicoletti ◽

L Dori ◽

G.C Cardinali ◽

A Parisini

Keyword(s):

Air Quality ◽

Laser Ablation ◽

Noble Metal ◽

Gas Sensors ◽

Pulsed Laser ◽

Pulsed Laser Ablation ◽

Quality Monitoring ◽

Air Quality Monitoring ◽

Metal Doped

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Understanding the noble metal modifying effect on In2O3 nanowires: highly sensitive and selective gas sensors for potential early screening of multiple diseases

Nanoscale Horizons ◽

10.1039/c9nh00404a ◽

2019 ◽

Vol 4 (6) ◽

pp. 1361-1371 ◽

Cited By ~ 13

Author(s):

Wei Liu ◽

Jiao Sun ◽

Lin Xu ◽

Shidong Zhu ◽

Xiangyu Zhou ◽

...

Keyword(s):

Noble Metal ◽

Gas Sensors ◽

Sensor Arrays ◽

Exhaled Breath ◽

Early Screening ◽

Highly Sensitive ◽

Modifying Effect

Sensor arrays consisting of In2O3 NWs loaded with different NMNPs can accurately distinguish different trace VOC biomarkers in simulated exhaled breath.

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Analysis of the noble metal catalytic additives introduced by impregnation of as obtained SnO2 sol–gel nanocrystals for gas sensors

Sensors and Actuators B Chemical ◽

10.1016/s0925-4005(00)00565-7 ◽

2000 ◽

Vol 70 (1-3) ◽

pp. 87-100 ◽

Cited By ~ 238

Author(s):

A. Cabot ◽

J. Arbiol ◽

J.R. Morante ◽

U. Weimar ◽

N. Bârsan ◽

...

Keyword(s):

Noble Metal ◽

Gas Sensors ◽

Sol Gel ◽

Catalytic Additives

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Gas Response Properties of Noble Metal Modified TiO2 Gas Sensor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.706-708.126 ◽

2013 ◽

Vol 706-708 ◽

pp. 126-129

Author(s):

Mao Lin Zhang ◽

Tao Ning ◽

Yu Hong Yang

Keyword(s):

Activation Energy ◽

Noble Metal ◽

Gas Sensors ◽

Response Mechanism ◽

X Ray Diffraction ◽

Response Properties ◽

X Ray ◽

Response Characteristics ◽

Gas Response ◽

Scanning Electron

The response characteristics of noble metal (platinum and palladium) modified TiO2 gas sensors were investigated, respectively. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the sensing films. In addition, the resistance of sensors response to oxygen partial pressure was discussed by Kroger–Vink model. The response properties indicated that Pt modified TiO2 was providing excellent response properties when the sensor exposed to hydrogen and oxygen. The response mechanism was suggested to arise from the activation energy (E) of the modified sensing films.

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