CO2gas detection properties of a TIO2/Al2O3heterostructure under UV light irradiation

Karaduman, Irmak; Demir, Mehmet; Yıldız, D. E.; Acar, Selim

doi:10.1088/0031-8949/90/5/055802

Cited by 42 publications

(9 citation statements)

References 62 publications

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“…The adsorption of CO 2 on the ZnTiO 3 NA sensitive layer depends on the operating temperature as it dictates the electrical properties of the semiconductor. The sensing mechanism of CO 2 by an n-type material (ZnTiO 3 NAs) is exactly similar to the acetone and humidity sensing mechanisms . At 45 °C, CO 2 was observed to have a much higher response compared to other gases, and when mixed with acetone the sensor was unable to detect acetone due to the high inflence of CO 2 (see Figure b).…”

Section: Results and Discussionmentioning

confidence: 63%

“…The sensing mechanism of CO 2 by an n-type material (ZnTiO 3 NAs) is exactly similar to the acetone and humidity sensing mechanisms. 66 At 45 °C, CO 2 was observed to have a much higher response compared to other gases, and when mixed with acetone the sensor was unable to detect acetone due to the high inflence of CO 2 (see Figure 9b). The sensing profile of a typical selectivity test with CO 2 as the cross-interfering gas with and without UV illumination is shown in Supporting Information, Figure S13.…”

Section: Resultsmentioning

confidence: 98%

“…Under illumination, the photoinduced electrons react with CO 2 to form CO 2 – . Also, under UV illumination, CO 2 can break down into carbon monoxide and an oxygen atom . The produced oxygen atom combines with the molecular oxygen and form ozone O 3 .…”

Section: Results and Discussionmentioning

confidence: 99%

“…67 Also, under UV illumination, CO 2 can break down into carbon monoxide and an oxygen atom. 66 The produced oxygen atom combines with the molecular oxygen and form ozone O 3 . Both carbon monoxide and ozone are reducing gases.…”

Section: Resultsmentioning

confidence: 99%

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Zinc Titanate Nanoarrays with Superior Optoelectrochemical Properties for Chemical Sensing

Rashid¹,

Sabri²,

Kandjani³

et al. 2019

ACS Appl. Mater. Interfaces

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In this report, the gas sensing performance of zinc titanate (ZnTiO3) nanoarrays (NAs) synthesized by coating hydrothermally formed zinc oxide (ZnO) NAs with TiO2 using low-temperature chemical vapor deposition is presented. By controlling the annealing temperature, diffusion of ZnO into TiO2 forms a mixed oxide of ZnTiO3 NAs. The uniformity and the electrical properties of ZnTiO3 NAs made them ideal for light-activated acetone gas sensing applications for which such materials are not well studied. The acetone sensing performance of the ZnTiO3 NAs is tested by biasing the sensor with voltages from 0.1 to 9 V dc in an amperometric mode. An increase in the applied bias was found to increase the sensitivity of the device toward acetone under photoinduced and nonphotoinduced (dark) conditions. When illuminated with 365 nm UV light, the sensitivity was observed to increase by 3.4 times toward 12.5 ppm acetone at 350 °C with an applied bias of 9 V, as compared to dark conditions. The sensor was also observed to have significantly reduced the adsorption time, desorption time, and limit of detection (LoD) when excited by the light source. For example, LoD of the sensor in the dark and under UV light at 350 °C with a 9 V bias is found to be 80 and 10 ppb, respectively. The described approach also enabled acetone sensing at an operating temperature down to 45 °C with a repeatability of >99% and a LoD of 90 ppb when operated under light, thus indicating that the ZnTiO3 NAs are a promising material for low concentration acetone gas sensing applications.

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Section: Results and Discussionmentioning

confidence: 63%

Section: Resultsmentioning

confidence: 98%

Section: Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Zinc Titanate Nanoarrays with Superior Optoelectrochemical Properties for Chemical Sensing

Rashid¹,

Sabri²,

Kandjani³

et al. 2019

ACS Appl. Mater. Interfaces

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“…The results showed significant improvement in the response towards many types of gases, particularly carbon dioxide [58]. Copper oxide has also attracted more attention as a sensing material for CO2 detection with various structures such as nanocomposite, nanostructure, thick film and thin film [72][73][74]. Semiconducting pure and Gd doped CeO2 nanostructure were prepared by co-precipitation method for detection of CO2 in the range of 200-400 °C.…”

Section: Sensing Of Carbon Dioxide (Co2)mentioning

confidence: 99%

Nanostructured Metal Oxide Semiconductors towards Greenhouse Gas Detection

Dadkhah

Tulliani

2022

Chemosensors

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Climate change and global warming are two huge current threats due to continuous anthropogenic emissions of greenhouse gases (GHGs) in the Earth’s atmosphere. Accurate measurements and reliable quantifications of GHG emissions in air are thus of primary importance to the study of climate change and for taking mitigation actions. Therefore, the detection of GHGs should be the first step when trying to reduce their concentration in the environment. Throughout recent decades, nanostructured metal oxide semiconductors have been found to be reliable and accurate for the detection of many different toxic gases in air. Thus, the aim of this article is to present a comprehensive review of the development of various metal oxide semiconductors, as well as to discuss their strong and weak points for GHG detection.

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Atomic Layer Deposition to Materials for Gas Sensing Applications

Marichy

Pinna

2016

Adv Materials Inter

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Atomic layer deposition is a thin film deposition technique based on self‐terminated surface reactions. Contrarily to most of the thin film deposition techniques, it is not a line of sight deposition technique due to the sequential introduction of the gaseous precursors and because the reactants can only react with surface species. The precursors can thus diffuse into porous structures and the conformal coating of high aspect ratio structures can be achieved. Because of these peculiarities, atomic layer deposition is an attractive technique for fabricating materials to be applied in resistive gas sensors. This article focuses on materials for resistive gas sensor devices in which the sensing material is elaborated using atomic layer deposition, in at least one step of the fabrication. It will be shown that atomic layer deposition has proven to be well‐suited for the elaboration of compact thin films, nanostructures, and heterostructures to be applied for the detection of a variety of analytes such as toxic compounds, pollutants, explosives, etc. The chemical and physical properties of the sensing layers will be discussed in parallel to the gas sensing mechanisms in an attempt to develop clear structure–property correlations

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CO₂gas detection properties of a TIO₂/Al₂O₃heterostructure under UV light irradiation

Cited by 42 publications

References 62 publications

Zinc Titanate Nanoarrays with Superior Optoelectrochemical Properties for Chemical Sensing

Zinc Titanate Nanoarrays with Superior Optoelectrochemical Properties for Chemical Sensing

Nanostructured Metal Oxide Semiconductors towards Greenhouse Gas Detection

Atomic Layer Deposition to Materials for Gas Sensing Applications

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