H2 Sensing Performance of TiO2-Based Diode-Type Sensors

H2 sensing properties of anodic TiO2 films equipped with Pd or Pd-Pt alloy electrodes has been investigated in air and in N2 atmosphere at 250°C and room temperature. The use of a Pd-Pt alloy electrode and a Pt paste improved the magnitude of H2 response, response time, stability and pretreatment- and atmosphere-dependent response properties under humid environments.

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Coral-like ZnFe2O4–ZnO mesoporous heterojunction architectures: synthesis and enhanced sensing properties for triethylamine

Inorganic Chemistry Frontiers ◽

10.1039/d0qi00134a ◽

2020 ◽

Vol 7 (9) ◽

pp. 1918-1926 ◽

Cited By ~ 1

Author(s):

Tianye Yang ◽

Xiaodong Yang ◽

Mingming Zhu ◽

Hongwei Zhao ◽

Mingzhe Zhang

Keyword(s):

Response Time ◽

Fast Response ◽

Sensing Properties ◽

Fast Response Time ◽

Sensing Performance

A unique coral-like ZnFe2O4–ZnO heterojunction architecture based sensor has been synthesized and shows excellent sensing performance for TEA with a particularly fast response time of 0.9 s.

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

RSC Advances ◽

10.1039/c6ra02306a ◽

2016 ◽

Vol 6 (43) ◽

pp. 37085-37092 ◽

Cited By ~ 16

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.

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Room-temperature sensing performance of hydrogen using palladium-based film by optical setup

Optica Applicata ◽

10.37190/oa200411 ◽

2020 ◽

Vol 50 (4) ◽

Author(s):

_ Yiyun Yao ◽

Alain J. Corso ◽

Marco Bazzan ◽

Enrico Tessarolo ◽

Zhanshan Wang ◽

...

Keyword(s):

Lattice Constant ◽

Room Temperature ◽

Temperature Sensing ◽

The Other ◽

Hydrogen Atoms ◽

Alloy Films ◽

Sensitivity Loss ◽

Interstitial Volume ◽

Pt Alloy ◽

Sensing Performance

H2 sensing performance of novel Pd–Pt alloy films has been compared with those obtained by using Pd films and H2-reducted PdO films. Two different detecting systems were used to measure the hydrogenation and de-hydrogenation phases with a H2 concentration of both 5% v/v nitrogen and 1% v/v nitrogen at room temperature. The sensitivity loss observed for the Pd–Pt alloy and H2-reducted PdO samples with respect to pure Pd samples can be explained in terms of the reduction in the lattice constant and interstitial volume due to the Pt addition, which determine a decrement of hydrogen atoms penetrating in the films. On the other hand, results show an improvement in time -response for Pd–Pt alloy and H2-reducted PdO films with respect to pure Pd ones, presumably due to the increase of its permeability to H2. Moreover, the sensing measurements repeated after 60 days show that the Pd–Pt alloy films, unlike the Pd-based ones, fully preserve their performances, demonstrating the advantage of the Pt inclusion for stability purposes when the samples are stored upon humidity.

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Surface engineering of Ti3C2Tx MXene by oxygen plasma irradiation as room temperature ethanol sensor

Functional Materials Letters ◽

10.1142/s1793604722510079 ◽

2021 ◽

Author(s):

Zijing Wang ◽

Fen Wang ◽

Angga Hermawan ◽

Jianfeng Zhu ◽

Shu Yin

Keyword(s):

Surface Modification ◽

Response Time ◽

Room Temperature ◽

Oxygen Plasma ◽

Surface Engineering ◽

Gas Sensitivity ◽

Plasma Irradiation ◽

Gas Response ◽

Mesoporous Structures ◽

Sensing Performance

In this work, a surface modification strategy by oxygen plasma irradiation was introduced for the first time to significantly improve the room temperature sensing performance of Ti3C2T[Formula: see text] MXene. Oxygen plasma irradiation induced TiO2 formation on the Ti3C2T[Formula: see text] surface, produced lattice distortion, increased the specific surface area, and provided mesoporous structures. The gas sensitivity performance characterization results show the gas response value of Ti3C2T[Formula: see text] irradiated for 0.5 h (Ti3C2T[Formula: see text]0.5P) was hundreds of times better than the pristine Ti3C2T[Formula: see text]alongside with its sufficient response time (280 s) and rapid recovery time (11 s). The excellent sensing performance is attributed to the formation of more reactive sites on the edge and basal planes of Ti3C2T[Formula: see text] and mesoporous structures which greatly improved the adsorption of ethanol. Additionally, the relatively low work function of TiO2 facilitates the formation of a Schottky junction for easy migration of charge carrier, the thereby shortening the sensing response time. This strategy offers a facile and controllable surface modification of other 2D materials, without damaging their structures.

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Sensing Properties of Diode-Type Gas Sensors

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.99.61 ◽

2016 ◽

Vol 99 ◽

pp. 61-65

Author(s):

Yasuhiro Shimizu ◽

Takeo Hyodo

Keyword(s):

Gas Sensors ◽

Polymer Coating ◽

Alloy Electrode ◽

Sensing Properties ◽

Pt Alloy

Several approaches to improve H2 sensing properties of TiO2-based diode-types sensors have been investigated. Those include the adoption of a Pd-Pt alloy electrode instead of using a pure Pd electrode, formation of a polymer coating atop the Pd-Pt alloy electrode and an Au coating on the Pd-Pt alloy electrode. The advantages of the using of the Pd-Pt alloy electrode, the polymer or Au coatings are demonstrated.

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

Royal Society Open Science ◽

10.1098/rsos.171788 ◽

2018 ◽

Vol 5 (2) ◽

pp. 171788 ◽

Cited By ~ 7

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.

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Porous CeO2 nanospheres for a room temperature triethylamine sensor under high humidity conditions

New Journal of Chemistry ◽

10.1039/c8nj03300e ◽

2018 ◽

Vol 42 (19) ◽

pp. 15954-15961 ◽

Cited By ~ 11

Author(s):

Cecilia A. Zito ◽

Tarcísio M. Perfecto ◽

Diogo P. Volanti

Keyword(s):

Relative Humidity ◽

Response Time ◽

Room Temperature ◽

High Humidity ◽

Sensing Performance

The porous CeO2 nanospheres showed an enhanced triethylamine sensing performance at 98% of relative humidity in terms of sensitivity, selectivity, repeatability, and response time.

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