Ammonia gas sensors based on undoped and Ca-doped ZnO nanoparticles

Hjiri, M.; Algessair, Saja; Dhahri, R.; Albargi, Hasan B.; Ben Mansour, N.; Assadi, A. A.; Neri, G.

doi:10.1039/d3ra08181h

Cited by 3 publications

(1 citation statement)

References 47 publications

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“…The recent research on ZnO-based gas sensors has primarily focused on the detection gases of carbon monoxide (CO) [32], carbon dioxide (CO 2 ) [33], hydrogen sulfide (H 2 S) [21], nitrogen dioxide (NO 2 ) [21,34], and ammonia (NH 3 ) [25,35,36]. The focus on these gases is likely due to their importance in various industrial and environmental applications, where detecting toxic, flammable, or greenhouse gases is crucial for safety.…”

Section: Introductionmentioning

confidence: 99%

Influence of pH on Room-Temperature Synthesis of Zinc Oxide Nanoparticles for Flexible Gas Sensor Applications

Mechai,

Al Shboul,

Bensidhoum

et al. 2024

Chemosensors

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This research contributes to work on synthesizing zinc oxide nanoparticles (ZnO NPs) at room temperature (RT) and their utilization in flexible gas sensors. RT ZnO NP synthesis with a basicity solution (pH ≈ 13) demonstrates an efficient method for synthesizing well-crystalline ZnO NPs (RT.pH13) comparable to those synthesized by the hydrothermal method (hyd.C). The RT.pH13 achieved a high thermal stability with minimal organic reside impurities (~4.2 wt%), 30–80 nm particle size distribution, and a specific surface area (14 m2 g−1). The synthesized pre- and post-calcinated RT.pH13 NPs were then incorporated into flexible sensors for gas sensing applications at ambient conditions (RT and relative humidity of 30–50%). The pre-calcinated ZnO-based sensor (RT.pH13) demonstrated superior sensitivity to styrene and acetic acid and lower sensitivity to dimethyl-6-octenal. The calcinated ZnO-based sensor (RT.pH13.C) exhibited lower sensitivity to styrene and acetic acid, but heightened sensitivity to benzene, acetone, and ethanol. This suggests a correlation between sensitivity and structural transformations following calcination. The investigation of the sensing mechanisms highlighted the role of surface properties in the sensors’ affinity for specific gas molecules and temperature and humidity variations. The study further explored the sensors’ mechanical flexibility, which is crucial for flexible Internet of Things (IoT) applications.

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Section: Introductionmentioning

confidence: 99%

Influence of pH on Room-Temperature Synthesis of Zinc Oxide Nanoparticles for Flexible Gas Sensor Applications

Mechai,

Al Shboul,

Bensidhoum

et al. 2024

Chemosensors

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Development of high performance ammonia sensor based on Al doped SnO2 operable at room temperature

Suvarna,

Ganga Reddy,

Madhu Mohan

et al. 2024

Inorganic Chemistry Communications

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Ammonia Detection by Electronic Noses for a Safer Work Environment

Reis,

Moura,

Gonçalves

et al. 2024

Sensors

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Providing employees with proper work conditions should be one of the main concerns of any employer. Even so, in many cases, work shifts chronically expose the workers to a wide range of potentially harmful compounds, such as ammonia. Ammonia has been present in the composition of products commonly used in a wide range of industries, namely production in lines, and also laboratories, schools, hospitals, and others. Chronic exposure to ammonia can yield several diseases, such as irritation and pruritus, as well as inflammation of ocular, cutaneous, and respiratory tissues. In more extreme cases, exposure to ammonia is also related to dyspnea, progressive cyanosis, and pulmonary edema. As such, the use of ammonia needs to be properly regulated and monitored to ensure safer work environments. The Occupational Safety and Health Administration and the European Agency for Safety and Health at Work have already commissioned regulations on the acceptable limits of exposure to ammonia. Nevertheless, the monitoring of ammonia gas is still not normalized because appropriate sensors can be difficult to find as commercially available products. To help promote promising methods of developing ammonia sensors, this work will compile and compare the results published so far.

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Ammonia gas sensors based on undoped and Ca-doped ZnO nanoparticles

Abstract: Ca-ZnO gas sensor exibited a good response and high selectivity toward NH3 gas. Theses performances make the material an excellent candidate for monitoring ammonia gas at low concentrations.

Cited by 3 publications

References 47 publications

Influence of pH on Room-Temperature Synthesis of Zinc Oxide Nanoparticles for Flexible Gas Sensor Applications

Influence of pH on Room-Temperature Synthesis of Zinc Oxide Nanoparticles for Flexible Gas Sensor Applications

Development of high performance ammonia sensor based on Al doped SnO2 operable at room temperature

Ammonia Detection by Electronic Noses for a Safer Work Environment

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