Ultrasensitive NO2 gas sensing performance of two dimensional ZnO nanomaterials: Nanosheets and nanoplates

Duy, Lai Van; Nguyet, To Thi; Hung, Chu Manh; Le, Dang Thi Thanh; Duy, Nguyễn Văn; Hòa, Nguyễn Đức; Biasioli, Franco; Tonezzer, Matteo; Natale, Corrado Di

doi:10.1016/j.ceramint.2021.07.042

Cited by 43 publications

(10 citation statements)

References 39 publications

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“…5A and S2 † indicate the linear dependence of the current ( I ) on applied voltage ( V ), which is regarded as the ohmic contact between Pt and ZnO, possibly caused by the high defect level of the ZnO nanoplates. 32 Given that the sensor was investigated at high temperatures over 100 °C, the thermal energy excited the electrons from the shallow donor region up to the conduction band, thereby decreasing the base resistance. The presence of Ag/Pd alloying nanoparticles on the semiconductor suggests the modulation of current (or resistance) with increasing temperature, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates

Nguyet

Duy

et al. 2023

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

“…The ZnO nanoplates were prepared according to a previous report. 32 ZnSO 4 ·7H 2 O (10 mmol) was dissolved in 30 mL of deionized water, and 20 mmol urea solution was added with further stirring for 15 min. The resulting solution was directly transferred into a Teflon-lined stainless-steel autoclave.…”

Section: Methodsmentioning

confidence: 99%

A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates

Nguyet

Duy

et al. 2023

RSC Adv.

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“…The gas sensors were prepared, as shown in Figure 1 , using drop-casting and following a method found in the literature [ 24 ]. The V 2 O 5 nanosheets were dispersed in N-vinylpyrrolidone to form a colloidal solution and then deposited on a silicon dioxide substrate.…”

Section: Methodsmentioning

confidence: 99%

Room Temperature Ammonia Gas Sensor Based on p-Type-like V2O5 Nanosheets towards Food Spoilage Monitoring

Duy

Nguyet

et al. 2022

Nanomaterials

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Gas sensors play an important role in many areas of human life, including the monitoring of production processes, occupational safety, food quality assessment, and air pollution monitoring. Therefore, the need for gas sensors to monitor hazardous gases, such as ammonia, at low operating temperatures has become increasingly important in many fields. Sensitivity, selectivity, low cost, and ease of production are crucial characteristics for creating a capillary network of sensors for the protection of the environment and human health. However, developing gas sensors that are not only efficient but also small and inexpensive and therefore integrable into everyday life is a difficult challenge. In this paper, we report on a resistive sensor for ammonia detection based on thin V2O5 nanosheets operating at room temperature. The small thickness and porosity of the V2O5 nanosheets give the sensors good performance for sensing ammonia at room temperature (RT), with a relative change of resistance of 9.4% to 5 ppm ammonia (NH3) and an estimated detection limit of 0.4 ppm. The sensor is selective with respect to the seven interferents tested; it is repeatable and stable over the long term (four months). Although V2O5 is generally an n-type semiconductor, in this case the nanosheets show a p-type semiconductor behavior, and thus a possible sensing mechanism is proposed. The device’s performance, along with its size, low cost, and low power consumption, makes it a good candidate for monitoring freshness and spoilage along the food supply chain.

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“…The ZnO nanorods exhibited great gas sensitivity with a sensor's response of 70% and response and recovery times of 16 s and 200 s, respectively, toward 5 ppm of NO 2 . Van Duy et al [137] synthesized zinc oxide nanosheets with a thickness of 15 nm and a sensor's response of 76% under 0.5 ppm NO 2 . Nevertheless, other scholars prepared porous ZnO nanosheets with a porosity of about 16% and an average pore size of 60 nm that showed a response of 2.93% under 0.5 ppm NO 2 [133].…”

Section: Effect Of Morphology and Nanostructure Of Mos On Gas Perform...mentioning

confidence: 99%

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

Dadkhah

Tulliani

2022

Sensors

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During recent decades, metal oxide semiconductors (MOS) have sparked more attention in various applications and industries due to their excellent sensing characteristics, thermal stability, abundance, and ease of synthesis. They are reliable and accurate for measuring and monitoring environmentally important toxic gases, such as NO2, NO, N2O, H2S, CO, NH3, CH4, SO2, and CO2. Compared to other sensing technologies, MOS sensors are lightweight, relatively inexpensive, robust, and have high material sensitivity with fast response times. Green nanotechnology is a developing branch of nanotechnology and aims to decrease the negative effects of the production and application of nanomaterials. For this purpose, organic solvents and chemical reagents are not used to prepare metal nanoparticles. On the contrary, the synthesis of metal or metal oxide nanoparticles is done by microorganisms, either from plant extracts or fungi, yeast, algae, and bacteria. Thus, this review aims at illustrating the possible green synthesis of different metal oxides such as ZnO, TiO2, CeO2, SnO2, In2O3, CuO, NiO, WO3, and Fe3O4, as well as metallic nanoparticles doping.

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Ultrasensitive NO2 gas sensing performance of two dimensional ZnO nanomaterials: Nanosheets and nanoplates

Cited by 43 publications

References 39 publications

A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates

A sigh-performance hydrogen gas sensor based on Ag/Pd nanoparticle-functionalized ZnO nanoplates

Room Temperature Ammonia Gas Sensor Based on p-Type-like V2O5 Nanosheets towards Food Spoilage Monitoring

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

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