Room temperature ppt-level NO<sub>2</sub> gas sensor based on SnO
                  <sub>x</sub>
               /SnS nanostructures with rich oxygen vacancies

Tang, Haida; Gao, Chenshan; Yang, Huiru; Sacco, Leandro; Sokolovskij, Robert; Zheng, Huarong; Ye, Huaiyu; Vollebregt, Sten; Yu, Hongyu; Fan, Xuejun; Zhang, Guoqi

doi:10.1088/2053-1583/ac13c1

Cited by 17 publications

(7 citation statements)

References 61 publications

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“…In this compound, Van der Waal's force is responsible for bonding Sn and S atoms [70]. The charge exchange between polar gases and SnS is favored because of the anisotropic crystal structure of SnS, making it a good candidate for sensing applications [71,72]. Rana et al [73] synthesized SnS QDs for ethanol sensing.…”

Section: Zns Qd Gas Sensormentioning

confidence: 99%

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Mirzaei

Kordrostami

Shahbaz

et al. 2022

Sensors

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Quantum dots (QDs) are used progressively in sensing areas because of their special electrical properties due to their extremely small size. This paper discusses the gas sensing features of QD-based resistive sensors. Different types of pristine, doped, composite, and noble metal decorated QDs are discussed. In particular, the review focus primarily on the sensing mechanisms suggested for these gas sensors. QDs show a high sensing performance at generally low temperatures owing to their extremely small sizes, making them promising materials for the realization of reliable and high-output gas-sensing devices.

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Section: Zns Qd Gas Sensormentioning

confidence: 99%

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Mirzaei

Kordrostami

Shahbaz

et al. 2022

Sensors

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“…The advantages such as lengthy lifespan, ecofriendliness, easy miniaturization, recyclability, low-cost enhancement of mass production, and environmental sustainability of the product. Moreover, the range of target gas being detected by the MOS-based sensor is wider than the other gas sensor types and is in the concentration range from ppb to ppt . For environmental monitoring of several important urban air pollutants, such as nitrogen oxides (NO x ), ozone (O 3 ), volatile organic compounds (VOCs), sulfur oxides (SO x ), and carbon oxides (CO x ), the operability of sensing materials, namely TiO 2 , In 2 O 3 , SnO 2 , and ZnO, have demonstrated high potential for gas-sensing and monitoring applications. , …”

mentioning

confidence: 99%

“…Moreover, the range of target gas being detected by the MOS-based sensor is wider than the other gas sensor types and is in the concentration range from ppb to ppt. 6 For environmental monitoring of several important urban air pollutants, such as nitrogen oxides (NO x ), ozone (O 3 ), volatile organic compounds (VOCs), sulfur oxides (SO x ), and carbon oxides (CO x ), the operability of sensing materials, namely TiO 2 , In 2 O 3 , SnO 2 , and ZnO, have demonstrated high potential for gas-sensing and monitoring applications. 7,8 One of the promising MOS-based nanomaterials for gas detectors is the ZnO nanostructure, which is abundantly available in nature.…”

mentioning

confidence: 99%

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Soltabayev,

Raiymbekov,

Nuftolla

et al. 2024

ACS Sens.

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Cobalt-doped ZnO (CZO) thin films were deposited on glass substrates at room temperature by radio frequency (RF) magnetron sputtering of a single target prepared with ZnO and Co 3 O 4 powders. Changes in the crystallinity, morphology, optical properties, and chemical composition of the CZO thin films were investigated at various sputtering powers of 45, 60, and 75 W. All samples presented a hexagonal wurtzite-type structure with a preferential c-axis at the (002) plane, along with a distinct change in the strain values through X-ray diffraction patterns. Scanning electron and atomic force microscopy revealed uniform and dense deposition of nanorod CZO samples with a high surface roughness (RMS). The Hall mobility and carrier concentration increased with the introduction of Co + ions into the ZnO matrix, as seen from the Hall effect study. The gradual increase of the power applied on the target source significantly affected the morphology of the CZO thin film, which is reflected in the CO 2 -sensing performance. The best gas response to CO 2 was recorded for CZO-60 W with a response of 1.45 for 500 ppm CO 2 , and the response/recovery times were 72 and 35 s, respectively. The distinguishing feature of the CZO sensor is its ability to effectively and rapidly detect the CO 2 target gas at room temperature (∼27 °C, RT).

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“…Considering that the utilization of oxygen vacancies can further enhance the gas sensing properties of In 2 O 3 /Ti 3 C 2 T x heterojunctions, while few studies have been focused on this research, this makes us interested in constructing In 2 O 3 /Ti 3 C 2 T x heterojunctions with abundant oxygen vacancies. Meanwhile, the Schottky heterojunctions can play a positive effect on the resistance regulation, which could improve the sensing performance. − Therefore, the utilization of oxygen vacancies and Schottky heterojunctions is expected to improve Ti 3 C 2 T x -based gas sensors. However, few researchers have conducted relevant studies and tapped into the underlying mechanisms.…”

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confidence: 99%

Mesoporous and Encapsulated In₂O₃/Ti₃C₂T_x Schottky Heterojunctions for Rapid and ppb-Level NO₂ Detection at Room Temperature

Fan,

Yang,

Mehrez

et al. 2024

ACS Sens.

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Rapid and ultrasensitive detection of toxic gases at room temperature is highly desired in health protection but presents grand challenges in the sensing materials reported so far. Here, we present a gas sensor based on novel zero dimensional (0D)/two dimensional (2D) indium oxide (In 2 O 3 )/titanium carbide (Ti 3 C 2 T x ) Schottky heterostructures with a high surface area and rich oxygen vacancies for parts per billion (ppb) level nitrogen dioxide (NO 2 ) detection at room temperature. The In 2 O 3 /Ti 3 C 2 T x gas sensor exhibits a fast response time (4 s), good response (193.45% to 250 ppb NO 2 ), high selectivity, and excellent cycling stability. The rich surface oxygen vacancies play the role of active sites for the adsorption of NO 2 molecules, and the Schottky junctions effectively adjust the charge-transfer behavior through the conduction tunnel in the sensing material. Furthermore, In 2 O 3 nanoparticles almost fully cover the Ti 3 C 2 T x nanosheets which can avoid the oxidation of Ti 3 C 2 T x , thus contributing to the good cycling stability of the sensing materials. This work sheds light on the sensing mechanism of heterojunction nanostructures and provides an efficient pathway to construct high-performance gas sensors through the rational design of active sites.

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Room temperature ppt-level NO₂ gas sensor based on SnO _x /SnS nanostructures with rich oxygen vacancies

Abstract: Room temperature ppt-level NO 2 gas sensor based on SnO x /SnS nanostructures with rich oxygen vacancies. 2D Materials, 8(4), 1-12. [045006].

Cited by 17 publications

References 61 publications

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Mesoporous and Encapsulated In₂O₃/Ti₃C₂T_x Schottky Heterojunctions for Rapid and ppb-Level NO₂ Detection at Room Temperature

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Room temperature ppt-level NO2 gas sensor based on SnO x /SnS nanostructures with rich oxygen vacancies

Abstract: Room temperature ppt-level NO 2 gas sensor based on SnO x /SnS nanostructures with rich oxygen vacancies. 2D Materials, 8(4), 1-12. [045006].

Cited by 17 publications

References 61 publications

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Sensitivity Enhancement of CO2 Sensors at Room Temperature Based on the CZO Nanorod Architecture

Mesoporous and Encapsulated In2O3/Ti3C2Tx Schottky Heterojunctions for Rapid and ppb-Level NO2 Detection at Room Temperature

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Product

Resources

About

Room temperature ppt-level NO₂ gas sensor based on SnO _x /SnS nanostructures with rich oxygen vacancies

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Mesoporous and Encapsulated In₂O₃/Ti₃C₂T_x Schottky Heterojunctions for Rapid and ppb-Level NO₂ Detection at Room Temperature