Recent advances and perspectives on constructing metal oxide semiconductor gas sensing materials for efficient formaldehyde detection

Han, Zejun; Yuan, Qi; Yang, Zhengyi; Han, Huijian; Jiang, Yanyan; Du, Wenjing; Zhang, Xue; Zhang, Jizhi; Dai, Zhengfei; Wu, Lili; Fletcher, Cameron; Wang, Zhou; Liu, Jiurong; Lu, Guixia; Wang, Fenglong

doi:10.1039/d0tc03750h

Cited by 67 publications

(27 citation statements)

References 158 publications

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“…They possess excellent thermal and chemical stability, which leads these inorganic materials to be preferable in sensing devices to their organic counterparts (i.e., polymers) . Great potential in gas sensing applications has been also demonstrated by metal oxides when they were formed as nanofibers. − A tremendous amount of literature has focused on the development of metal oxide nanofibers as sensing layers for ammonia , and formaldehyde − detection due to their indispensable need. Moreover, for a QCM-based gas sensor, a sensor response mechanism via physical adsorption is more favorable.…”

Section: Nanofibers As An Active Sensing Materialsmentioning

confidence: 99%

Electrospun Nanofibers for Quartz Crystal Microbalance Gas Sensors: A Review

Rianjanu

Fauzi

Triyana

et al. 2021

ACS Appl. Nano Mater.

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In recent years, electrospun nanofibers made of various materials (e.g., polymers, composites, and semiconductors) have been extensively studied for the development of highly sensitive and selective gas sensors. These nanofibers possess unique three-dimensional (3D) interconnected porous structures that result in a large surface-area-to-volume ratio and high porosity. These properties have led to the widespread use of nanofibrous mats as active materials for mass-sensitive sensors, which use the gravimetric effect to measure the mass concentration of the adsorbed gases on their active surfaces. For this purpose, quartz crystal microbalance (QCM) has been considered as one of the most favorable mass-sensitive platforms because of its mature technology, low-cost production, fast sensing response, and highly flexible sensing area modification. This paper provides an overview of state-of-the-art QCM-based gas sensors that integrate electrospun nanofibers as their active materials. Several key parameters determining the sensor performance (e.g., sensitivity and limit of detection (LOD)) are summarized and discussed in relation to the current challenges. Finally, the outlook for future technological development is also provided.

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Section: Nanofibers As An Active Sensing Materialsmentioning

confidence: 99%

Electrospun Nanofibers for Quartz Crystal Microbalance Gas Sensors: A Review

Rianjanu

Fauzi

Triyana

et al. 2021

ACS Appl. Nano Mater.

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“…Currently, the functional modification of oxide semiconductors mainly includes metal cation doping, noble metal surface loading and semiconductor oxide composite, etc. [53]. (see Table 2 below for details).…”

Section: Doping Modification Of Matrix Materialsmentioning

confidence: 99%

Strategies for Improving the Sensing Performance of Semiconductor Gas Sensors for High-Performance Formaldehyde Detection: A Review

2021

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Formaldehyde is a poisonous and harmful gas, which is ubiquitous in our daily life. Long-term exposure to formaldehyde harms human body functions; therefore, it is urgent to fabricate sensors for the real-time monitoring of formaldehyde concentrations. Metal oxide semiconductor (MOS) gas sensors is favored by researchers as a result of their low cost, simple operation and portability. In this paper, the mechanism of formaldehyde detection by gas sensors is introduced, and then the ways of ameliorating the response of gas sensors for formaldehyde detection in recent years are summarized. These methods include the control of the microstructure and morphology of sensing materials, the doping modification of matrix materials, the development of new semiconductor sensing materials, the outfield control strategy and the construction of the filter membrane. These five methods will provide a good prerequisite for the preparation of better performing formaldehyde gas sensors.

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“…Metal oxide semiconductors (MOSs) have been successfully used to detect CO gas. MOSs have low cost, high sensitivity [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ], convenient operation, a rapid response and recovery time, high physical and chemical stabilities [ 22 ], excellent electrical performance [ 16 ], and a simple and portable design [ 2 ]. Among various MOSs, those based on ZnO have become widely manufactured and utilized because of their outstanding characteristics, such as a bandgap around 3.4 eV at room temperature [ 31 , 32 , 33 ], high optical transparency in the visible region (>80%), n-type conductivity, and high exciton binding energy in the order of 60 meV [ 31 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…Undoubtedly, to date, ZnO is a promising candidate for detecting CO gas; it offers good sensitivity and selectivity, as well as a high surface area for excellent gas sensor response and adsorption sites. For instance, the porous morphology of ZnO increases its surface area, which, along with high electron mobility, excellent electrical properties, and adsorption sites, allow an excellent gas sensor response [ 3 , 7 , 12 , 18 , 28 , 29 , 30 , 43 , 44 ]. However, further research is needed to improve the selectivity and sensitivity for CO gas detection.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

Pineda-Reyes

Herrera-Rivera

Rojas-Chávez

et al. 2021

Sensors

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Monitoring and detecting carbon monoxide (CO) are critical because this gas is toxic and harmful to the ecosystem. In this respect, designing high-performance gas sensors for CO detection is necessary. Zinc oxide-based materials are promising for use as CO sensors, owing to their good sensing response, electrical performance, cost-effectiveness, long-term stability, low power consumption, ease of manufacturing, chemical stability, and non-toxicity. Nevertheless, further progress in gas sensing requires improving the selectivity and sensitivity, and lowering the operating temperature. Recently, different strategies have been implemented to improve the sensitivity and selectivity of ZnO to CO, highlighting the doping of ZnO. Many studies concluded that doped ZnO demonstrates better sensing properties than those of undoped ZnO in detecting CO. Therefore, in this review, we analyze and discuss, in detail, the recent advances in doped ZnO for CO sensing applications. First, experimental studies on ZnO doped with transition metals, boron group elements, and alkaline earth metals as CO sensors are comprehensively reviewed. We then focused on analyzing theoretical and combined experimental–theoretical studies. Finally, we present the conclusions and some perspectives for future investigations in the context of advancements in CO sensing using doped ZnO, which include room-temperature gas sensing.

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Recent advances and perspectives on constructing metal oxide semiconductor gas sensing materials for efficient formaldehyde detection

Abstract: The sensing mechanisms and effective strategies for enhancing the formaldehyde detection performance of metal oxide semiconductors have been reviewed.

Cited by 67 publications

References 158 publications

Electrospun Nanofibers for Quartz Crystal Microbalance Gas Sensors: A Review

Electrospun Nanofibers for Quartz Crystal Microbalance Gas Sensors: A Review

Strategies for Improving the Sensing Performance of Semiconductor Gas Sensors for High-Performance Formaldehyde Detection: A Review

Recent Advances in ZnO-Based Carbon Monoxide Sensors: Role of Doping

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