Carbon monoxide (CO) optical gas sensor based on ZnO thin films

Paliwal, Ayushi; Sharma, Anjali; Tomar, Monika; Gupta, Vinay

doi:10.1016/j.snb.2017.05.064

Cited by 171 publications

(61 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, development of high-precision gas sensors with high sensitivity, fast response, good selectivity, low limit of detection (LOD), as well as in situ and real-time monitoring capabilities is paramount. 1,2 For this purpose, various types of gas sensors have been developed, mainly including resistive, [3][4][5] optical, [6][7][8][9] ultrasonic and acoustic wave, 10-12 thermoelectric 13,14 and electrochemical [15][16][17] ones.…”

Section: Introductionmentioning

confidence: 99%

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

et al. 2019

Mater. Horiz.

554

328

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

et al. 2019

Mater. Horiz.

554

328

View full text Add to dashboard Cite

show abstract

“…Due to its negative impact for both humans and the environment, the catalytic oxidation of CO into CO 2 has always been a research topic of great interest [1][2][3]. Moreover, the catalytic oxidation of CO is an important reaction in the technological fields of fuel cells [4][5][6], gas sensors [7], and CO 2 lasers [8].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Catalytic Properties of Copper-Promoted Nanoceria via a Hydrothermal Method

et al. 2019

View full text Add to dashboard Cite

Copper-cerium mixed oxide catalysts have gained ground over the years in the field of heterogeneous catalysis and especially in CO oxidation reaction due to their remarkable performance. In this study, a series of highly active, atomically dispersed copper-ceria nanocatalysts were synthesized via appropriate tuning of a novel hydrothermal method. Various physicochemical techniques including electron paramagnetic resonance (EPR) spectroscopy, X-ray diffraction (XRD), N2 adsorption, scanning electron microscopy (SEM), Raman spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) were employed in the characterization of the synthesized materials, while all the catalysts were evaluated in the CO oxidation reaction. Moreover, discussion of the employed mechanism during hydrothermal route was provided. The observed catalytic activity in CO oxidation reaction was strongly dependent on the nanostructured morphology, oxygen vacancy concentration, and nature of atomically dispersed Cu2+ clusters.

show abstract

“…They have many advantages: high sensitivity, small size, fast response, and low cost in mass production. n-Type metal oxides are widely used as sensitive materials [1], for example, SnO 2 [2,3], ZnO [4,5,6], In 2 O 3 [7,8], WO 3 [9], TiO 2 [10] and so on. One of the main disadvantages of these materials is their high sensitivity to humidity, which makes it difficult to use them in real outdoor conditions.…”

Section: Introductionmentioning

confidence: 99%

Co3O4 as p-Type Material for CO Sensing in Humid Air

Vladimirova

Krivetskiy

Rumyantseva

et al. 2017

Sensors

View full text Add to dashboard Cite

Nanocrystalline cobalt oxide Co3O4 has been prepared by precipitation and subsequent thermal decomposition of a carbonate precursor, and has been characterized in detail using XRD, transmission electron microscopy, and FTIR spectroscopy. The sensory characteristics of the material towards carbon monoxide in the concentration range 6.7–20 ppm have been examined in both dry and humid air. A sensor signal is achieved in dry air at sufficiently low temperatures T = 80–120 °C, but the increase in relative humidity results in the disappearance of sensor signal in this temperature range. At temperatures above 200 °C the inversion of the sensor signal in dry air was observed. In the temperature interval 180–200 °C the sensor signal toward CO is nearly the same at 0, 20 and 60% r.h. The obtained results are discussed in relation with the specific features of the adsorption of CO, oxygen, and water molecules on the surface of Co3O4. The independence of the sensor signal from the air humidity combined with a sufficiently short response time at a moderate operating temperature makes Co3O4 a very promising material for CO detection in conditions of variable humidity.

show abstract

Carbon monoxide (CO) optical gas sensor based on ZnO thin films

Cited by 171 publications

References 25 publications

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

Tuning the Catalytic Properties of Copper-Promoted Nanoceria via a Hydrothermal Method

Co3O4 as p-Type Material for CO Sensing in Humid Air

Contact Info

Product

Resources

About