Novel Co(OH)F/Zn(OH)F heterostructures for acetone gas sensor applications: Materials synthesis, characterization, and sensor performance evaluation

This study reports the employment of Co(OH)xF2−x nanosheets, a new material in the sensor field, for gas sensor applications. We synthesize Co(OH)xF2−x nanosheets via a hydrothermal route using SiO2 sphere templates. Our material characterization confirms that the material is a densely clustered Co(OH)xF2−x nanosheet with an amorphous microstructure with some short-range ordering. Sensors based on the nanosheets demonstrate a high response of 269% toward 4.5 ppm of acetone gas at an operation temperature of 200 °C and a very low minimum detection limit of 40 ppb. It functions effectively up to a temperature below 300 °C, above which F is found to start to evaporate. Our discussion suggests that an excellent sensor performance arises from the high catalytic function of F incorporated in a high concentration in the material as well as the high specific surface area due to the morphology of densely clustered nanosheets.

Download Full-text

High gas sensor performance of WO3 nanofibers prepared by electrospinning

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.158745 ◽

2021 ◽

Vol 864 ◽

pp. 158745

Author(s):

Paulo V. Morais ◽

Pedro H. Suman ◽

Ranilson A. Silva ◽

Marcelo O. Orlandi

Keyword(s):

Gas Sensor ◽

Sensor Performance

Download Full-text

Synthesis and studying of reduced few-layered graphene coatings in gas sensor applications

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/503/1/012013 ◽

2019 ◽

Vol 503 ◽

pp. 012013

Author(s):

Ingars Lukosevics ◽

Peteris Lesnicenoks ◽

Janis Kleperis

Keyword(s):

Gas Sensor ◽

Sensor Applications

Download Full-text

Pulsed laser deposition of metal oxide nanostructures for highly sensitive gas sensor applications

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2016.04.060 ◽

2016 ◽

Vol 236 ◽

pp. 978-987 ◽

Cited By ~ 25

Author(s):

Joni Huotari ◽

Ville Kekkonen ◽

Tomi Haapalainen ◽

Martin Leidinger ◽

Tilman Sauerwald ◽

...

Keyword(s):

Metal Oxide ◽

Pulsed Laser Deposition ◽

Gas Sensor ◽

Pulsed Laser ◽

Laser Deposition ◽

Sensor Applications ◽

Oxide Nanostructures ◽

Highly Sensitive ◽

Metal Oxide Nanostructures

Download Full-text

Vanadia doped tungsten–titania SCR catalysts as functional materials for exhaust gas sensor applications

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2010.11.046 ◽

2011 ◽

Vol 155 (1) ◽

pp. 199-205 ◽

Cited By ~ 17

Author(s):

Daniela Schönauer ◽

Ina Sichert ◽

Ralf Moos

Keyword(s):

Gas Sensor ◽

Functional Materials ◽

Exhaust Gas ◽

Sensor Applications ◽

Scr Catalysts ◽

Exhaust Gas Sensor

Download Full-text

Star-Fruit-Shaped CuO Structures for High Performance Ethanol Gas Sensor Device

Science of Advanced Materials ◽

10.1166/sam.2021.3968 ◽

2021 ◽

Vol 13 (4) ◽

pp. 724-733

Author(s):

Ahmad Umar ◽

Ahmed A. Ibrahim ◽

Rajesh Kumar ◽

Hassan Algadi ◽

Hasan Albargi ◽

...

Keyword(s):

Gas Sensor ◽

High Performance ◽

Crystal Size ◽

Gas Sensing ◽

Sensor Applications ◽

Sensor Device ◽

Star Fruit ◽

Micro Structures ◽

Gas Response ◽

Structural Crystal

In this paper, star-fruit-shaped CuO microstructures were hydrothermally synthesized and subsequently characterized through different techniques to understand morphological, compositional, structural, crystal, optical and vibrational properties. The formation of star-fruit-shaped structures along with some polygonal and spherical nanostructures was confirmed by FESEM analysis. XRD data and Raman spectrum confirmed the monoclinic tenorite crystalline phase of the CuO with crystal size 17.61 nm. Star-fruit-shaped CuO microstructures were examined for ethanol gas sensing behavior at various operating temperatures and concentrations. The gas response of 135% was observed at the optimal temperature of 225 °C. Due to excellent selectivity, stability and re-usability, the as-fabricated sensor based on star-fruit-shaped CuO micro-structures may be explored for future toxic gas sensor applications.

Download Full-text