ppb Sensing Level Hydrogen Sulphide at Room Temperature Using Indium Oxide Gas Sensors

Shboul, Ahmad Al; Shih, Andy; Oukachmih, Mimoun; Izquierdo, Ricardo

doi:10.1109/sensors43011.2019.8956528

Cited by 8 publications

(16 citation statements)

References 15 publications

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“…A SS was prepared from In 2 O 3 /10% Gt/17 % PS nanocomposite (no CuAc added). A detailed study for SS is presented in our previous publications. , Other modified sensors (Table S2) were prepared with various CuAc contents (2, 25, and 50 wt %), denoted as MS 2 , MS 25 , and MS 50 , respectively, and compared to MS 10 . These various compositions were considered to optimize the CuAc content in sensors toward achieving the highest response magnitude.…”

Section: Methodsmentioning

confidence: 99%

“…The lowest gas concentration, where sensors are sensitive, was used to compare sensors’ sensitivity, and the sensors were tested simultaneously. To evaluate the selectivity enhancement of the MS 10 , various gases, which were used to test SS selectivity property, , were introduced and monitored.…”

Section: Methodsmentioning

confidence: 99%

“…58 The sensing mechanism for chemiresistive sensors depends on the chemical reaction of sensing materials with the target gas (a chemical mechanism). 4,5 The sensing mechanism for Schottky contact sensors is based on the reaction between gas molecules with the chemisorbed oxygen molecules (eqs 5 and 6) at the heterojunction interface (an electronic mechanism). 8,58 As illustrated in eqs 7 and 8, 4,5 H 2 S molecules can oxidize/adsorb with chemisorbed oxygen molecules on heterojunction surfaces, resulting in the release of electrons to the nanocomposite film and a decrease in electrical resistance.…”

Section: And Gharaei Etmentioning

confidence: 99%

“…23 Additionally, the preparation process is time-and energy-consuming as it comprises a multistep deposition process for sensing materials combined with an annealing process in ambient air at 130 °C for 2 h. We invented a sensitive and selective H 2 S sensor to overcome these challenges based on easily/rapidly prepared nanocomposites comprising In 2 O 3 NPs, graphite (Gt) flakes, and polystyrene (PS). 4,5 We engineered our sensors with In 2 O 3 NPs as the sensing material, Gt flakes to enhance their electrical conductivity, and PS binder to improve their mechanical flexibility. The standard In 2 O 3 NP-based nanocomposite, namely, SS resulted in flexible sensing films having evenly distributed In 2 O 3 NPs in a 3D structure with an enhanced surface/volume ratio.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Depending on the H 2 S concentration level, it can act as a bio-marker to determine the food validity and quality. , Consequently, H 2 S sensors are valuable as odor-sensing systems (or electronic noses) for food quality control applications. , H 2 S sensors have been under continuous development for decades . However, the practical deployment in food packaging requires such sensors to be sensitive and selective to low H 2 S gas levels [parts per billion (ppb) range] under ambient conditions, have a fast response time (few seconds), flexible, and have robust/stable active layers to preserve the sensor performance under harsh environments. − Metal oxides such as indium oxide nanoparticle (In 2 O 3 NP)-based rigid sensors exhibit remarkable potential for successful H 2 S gas detection at room temperature. − …”

Section: Introductionmentioning

confidence: 99%

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Printed Chemiresistive In₂O₃ Nanoparticle-Based Sensors with ppb Detection of H₂S Gas for Food Packaging

Shboul

Izquierdo

2021

ACS Appl. Nano Mater.

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Cost-effective and disposable smart sensing technologies capable of monitoring packaged foods' degradation are necessary for human health and the growing processed-food industry. Herein, highly sensitive and selective hydrogen sulfide (H 2 S) gas sensors were fabricated from solution-printed nanocomposites comprising indium oxide nanoparticles (In 2 O 3 NPs), graphite flakes (Gt), polystyrene (PS), and copper acetate monohydrate (CuAc). The standard In 2 O 3 NP-based sensor (SS, without CuAc) showed H 2 S detection ≈100 ppb under ambient conditions. The presence of CuAc resulted in a highly sensitive nanocomposite layer enabling the detection of lower than 100 ppb (<100 ppb) concentrations of H 2 S gas levels, far superior to the standard In 2 O 3 NP-based nanocomposite. Adding CuAc to the In 2 O 3 NP-based nanocomposite as a modifying additive leads to copper sulfide (CuS) formation owing to its reaction with H 2 S gas. CuS significantly enhances the nanocomposite layer's conductivity and H 2 S reactions on the sensors' surface, resulting in a substantial reduction in electrical resistance for sensors. The modified In 2 O 3 NP-based sensor presents remarkable enhancement in their selectivity toward H 2 S gas detection when evaluated against various hazardous vapors. Furthermore, the modified In 2 O 3 NPbased sensors possess good anti-humid property under highly humid conditions (≈80% relative humidity). KEYWORDS: chemiresistive, copper acetate (CuAc), flexible, hydrogen sulfide (H 2 S), indium oxide nanoparticles (In 2 O 3 NPs), nanocomposite, nanocrystal, sensor

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: And Gharaei Etmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Printed Chemiresistive In₂O₃ Nanoparticle-Based Sensors with ppb Detection of H₂S Gas for Food Packaging

Shboul

Izquierdo

2021

ACS Appl. Nano Mater.

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Hydrogen Sulfide Gas Detection in ppb Levels at Room Temperature with a Printed, Flexible, Disposable In₂O₃ NPs‐Based Sensor for IoT Food Packaging Applications

Shboul

Ketabi

Mechael

et al. 2022

Adv Materials Technologies

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superior properties to perform IoT desired components such as low-cost, small, robust, thin, lightweight, wearable, flexible, and transparent. [3,4] Subsequently, the sector of sensors' development witnessed a significant leap, [5] resulting in the emergence of printable and flexible sensors for IoT applications. [6] This market is subjected to reach $8 billion by 2025, according to IDTechEx prediction. [7] While the gas and particle sensors market will hit $3 billion by 2027. [8] Gas sensors for hydrogen sulfide (H 2 S) detection at ambient conditions are in demand for IoT-based applications. [9,10] H 2 S gas, a flammable and toxic gas, is produced from the bacterial degradation of organic-sulfur-rich materials in the absence of oxygen (O 2 ), anaerobic digestion. [11] It is produced in the mammalian tissues via enzymatic and nonenzymatic pathways, [12] and in the mouth (Halitosis) and the large intestine by bacteria. [13,14] As well, it evolves from the bacterial degradation of organicsulfur-rich foods. [15] Consequently, H 2 S sensors can be valuable tools for various IoT applications such as smart indoor and outdoor air quality monitoring, smart healthcare, and smart food packaging. Noteworthy, the global market size of food packaging is expected to reach USD$464 billion by 2027, [16] signifying the application's high practical relevance.Until now, most studies on monitoring the sulfur-rich food freshness in the food packaging applications have relied on colorimetric-based indicators. [17][18][19][20][21] The H 2 S gas released by food changes the indicators' color attached to the package, showing that the food is spoiled. Despite the simplicity of colorimetricbased indicators that can be observed visually without further process. Because they are sensitive to humidity and require a high H 2 S concentration (>10 ppm) for the color change, such sensors are ineffective for the early diagnosis of food spoilage. [20] Besides, colorimetric sensors lack the subjectivity of color interpretation. [22] These issues are enough to cause a misunderstanding when the quality of a product changes. Surface-enhanced Raman scattering sensors were also used to detect H 2 S from spoilt fish. [23] However, this sensor must be transferred from the food package for imaging via a Raman spectrometer to verify the H 2 S evolution from spoiled food, making it unsuitable for commercial use.Researchers have been developing H 2 S sensors for decades. [24] However, some drawbacks limit their deployment for Flexible printed sensors are essential components for modern Internet of Things applications. They may twist and bend to fit any shape or surface. New potential applications emerge as these sensors' sophistication and sensing efficiency improve. In this study, a printed sensor is prepared from indium oxide nanoparticles (In 2 O 3 NPs)-based nanocomposite for hydrogen sulfide (H 2 S) gas detection at ambient conditions. The as-fabricated sensor has excellent capabilities, including sensitivity and selectivity to low gas concentrations tha...

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Detection of Micro-Scale Li Dendrite via H2 Gas Capture for Early Safety Warning

Jin

Zheng

Wei

et al. 2020

Joule

164

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ppb Sensing Level Hydrogen Sulphide at Room Temperature Using Indium Oxide Gas Sensors

Cited by 8 publications

References 15 publications

Printed Chemiresistive In₂O₃ Nanoparticle-Based Sensors with ppb Detection of H₂S Gas for Food Packaging

Printed Chemiresistive In₂O₃ Nanoparticle-Based Sensors with ppb Detection of H₂S Gas for Food Packaging

Hydrogen Sulfide Gas Detection in ppb Levels at Room Temperature with a Printed, Flexible, Disposable In₂O₃ NPs‐Based Sensor for IoT Food Packaging Applications

Detection of Micro-Scale Li Dendrite via H2 Gas Capture for Early Safety Warning

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ppb Sensing Level Hydrogen Sulphide at Room Temperature Using Indium Oxide Gas Sensors

Cited by 8 publications

References 15 publications

Printed Chemiresistive In2O3 Nanoparticle-Based Sensors with ppb Detection of H2S Gas for Food Packaging

Printed Chemiresistive In2O3 Nanoparticle-Based Sensors with ppb Detection of H2S Gas for Food Packaging

Hydrogen Sulfide Gas Detection in ppb Levels at Room Temperature with a Printed, Flexible, Disposable In2O3 NPs‐Based Sensor for IoT Food Packaging Applications

Detection of Micro-Scale Li Dendrite via H2 Gas Capture for Early Safety Warning

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Printed Chemiresistive In₂O₃ Nanoparticle-Based Sensors with ppb Detection of H₂S Gas for Food Packaging

Printed Chemiresistive In₂O₃ Nanoparticle-Based Sensors with ppb Detection of H₂S Gas for Food Packaging

Hydrogen Sulfide Gas Detection in ppb Levels at Room Temperature with a Printed, Flexible, Disposable In₂O₃ NPs‐Based Sensor for IoT Food Packaging Applications