A benzene vapor sensor based on a metal-organic framework-modified quartz crystal microbalance

Ma, Zhongjun; Yuan, Tongwei; Yu, Fan; Wang, Luyu; Duan, Zhiming; Du, Wei; Zhang, Dan; Xu, Jiaqiang

doi:10.1016/j.snb.2019.127365

Cited by 73 publications

(36 citation statements)

References 44 publications

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“…In addition, there were a large number of [AlO 2 ] negative charges in ZSM-5, which had strong adsorption on polar gas molecules [30]. Benzene is a kind of nonpolar gas [31], which was difficult to be adsorbed by the ZSM-5 when it passes through the ZSM-5 modified layer. Meanwhile, benzene had the largest molecular dynamics diameter in this experiment, so it was difficult to pass through the ZSM-5 modified layer and reach the nano-SnO 2 film [21].…”

Section: Discussion On Gas Sensitive Mechanismmentioning

confidence: 99%

Enhancing Formaldehyde Selectivity of SnO2 Gas Sensors with the ZSM-5 Modified Layers

Wang

Zhang

et al. 2021

Sensors

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High performance formaldehyde gas sensors are widely needed for indoor air quality monitoring. A modified layer of zeolite on the surface of metal oxide semiconductors results in selectivity improvement to formaldehyde as gas sensors. However, there is insufficient knowledge on how the thickness of the zeolite layer affects the gas sensing properties. In this paper, ZSM-5 zeolite films were coated on the surface of the SnO2 gas sensors by the screen printing method. The thickness of ZSM-5 zeolite films was controlled by adjusting the numbers of screen printing layers. The influence of ZSM-5 film thickness on the performance of ZSM-5/SnO2 gas sensors was studied. The results showed that the ZSM-5/SnO2 gas sensors with a thickness of 19.5 μm greatly improved the selectivity to formaldehyde, and reduced the response to ethanol, acetone and benzene at 350 °C. The mechanism of the selectivity improvement to formaldehyde of the sensors was discussed.

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Section: Discussion On Gas Sensitive Mechanismmentioning

confidence: 99%

Enhancing Formaldehyde Selectivity of SnO2 Gas Sensors with the ZSM-5 Modified Layers

Wang

Zhang

et al. 2021

Sensors

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“…Even though toluene has a structure similar to benzene, it can also be distinguished. [25] 2). [26] Thin films consisting of non-centrosymmetric heterostructured binary Janus MOF [Cu 2 (dicarboxylate) 2 (DABCO) 1n ] were generated on a QCM sensor by Meilikhov and co-workers.…”

Section: Mass Sensitive Sensorsmentioning

confidence: 99%

“…Their studies reveal that the sensor could cut off several kinds of interfering gases, yielding a better result. Even though toluene has a structure similar to benzene, it can also be distinguished [25] . In 2017, Zhou and co‐workers engineered a novel copper MOF, [Cu 3 L 2 (H 2 O) 2.75 ] ⋅ 0.75H 2 O ⋅ 1.75DMA (H 3 L=4‐(2‐carboxyphenoxy)‐isophthalic acid, DMA=dimethylacetamide), based on which, they constructed a QCM which shows good sensitivity towards humidity (Figure 2).…”

Section: Mass Sensitive Sensorsmentioning

confidence: 99%

A Comprehensive Overview on Advanced Sensing Applications of Functional Metal Organic Frameworks (MOFs)

Fasna

Sasi

2021

ChemistrySelect

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This review intends to encapsulate the advanced developments in the field of sensors based on MOF materials. MOFs possess structural tunability and vast surface area, which are vital for the development of efficient sensors. The energy transfer schemes within the frameworks and their light-harvesting capacity make MOFs functional, active and integral components in MOF-based devices. Their chemically tunable frame-work with precise host-guest interactions performs a significant role in specific sensing of biomolecules, small organic molecules and metal ions. Depending on the signal transduction schemes, four major classes of MOF-based sensing devices have been outlined. Also, the significant challenges and restrictions of this research field have been discussed.

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“…The detection, differentiation, and visualization of molecules, such as organic solvents, pesticides, and NACs, using sensors is challenging, with the study of transduction mechanisms upon specific analyte recognition that emits an optical signal as the most interesting and promising approach. [156,157] The binding of analyte molecules with MOFs must cause changes in the electronic transitions and molecular arrangement of MOFs, which result in changes in the optical properties that are easily detected using fluorescence techniques. [158,159] Common mechanisms involve the transfer of energy or electronic charges between substrate molecules and photoexcited fluorophores, which can result in either "turn on-off" fluorescence responses, followed by fluorescence enhancement, or quenching.…”

Section: Mechanisms For Altering Luminescence Signalsmentioning

confidence: 99%

Mechanistic Insight into Charge and Energy Transfers of Luminescent Metal–Organic Frameworks Based Sensors for Toxic Chemicals

Mohan

Kumar

et al. 2021

Advanced Sustainable Systems

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The success of MOFs has driven their development as a new tool for sensing analytes including toxic chemicals. [19][20][21] The MOF sensors can be applied in both environmental and biological systems. [22] The MOF sensor field has been established with the development of sensors for different metal ions, anions, and molecules. [23,24] The potential application of MOF sensors to the detection of heavy metal ions, toxic anions, and other hazardous species is of great interest. [25,26] Specifically, luminescence technology has allowed the roles of various MOF sites in analyte capture to be easily studied. [27][28][29] The precise use of MOFs is potentially a good tool for analyte detection. Furthermore, MOFs have been established as potential materials for selective, fast, and portable tools for sensing toxic chemicals, with the advantage of light-emitting properties. [30,31] Interestingly, these sensing models can operate in water and are pH stable with high efficiency. [32] Furthermore, MOFs are wellknown materials for the degradation of toxic chemicals. [33,34] Several reports have been published on MOF sensors for toxicant chemicals, such as metal ions, anions, organic solvents, pesticides, nitroaromatic compounds (NACs), chemical warfare agents, [35] and others. [36][37][38] Some reviews have summarized applications of MOFs in sensing and detection probes for ions and volatile organic compounds, [39] and MOF sensors in pesticide detection and absorption with their classification. [40] Others have summarized and analyzed interactions between hazardous compound adsorbates and MOFs. [41,42] The stability and applications of MOFs have been summarized by the research groups of Ding and coworkers. [43] Pehlivan and et al. summarized the role of fluorescence resonance energy transfer in elucidating molecular interactions utilized in biosensing tools. [44,45] Besides luminescence sensing, the reviewers summarized the progress of MOFs relevance in the various area including environment and medical science. [46] Recently, Liu and coworkers summarized the progress of MOFs and discussed the remaining challenges in drug delivery, [47] Garcia and coworkers studied and compared the MOFs as photocatalysts with common inorganic photocatalysts, [48] and Manos and coworkers studied and summarized MOFs challenges and prospects for ion-exchange and sorption applications. [49] Despite these meaningful reviews, the factors responsible for signal changes, mechanisms, and limits of detection have Mechanistic studies of materials able to detect hazardous and toxic chemicals, such as common organic solvents, pesticides, and nitroaromatic compounds (NACs), are critically important owing to the threat they pose to humans and the environment. Recently, porous luminescent metal-organic frameworks (MOFs) with multifunctional sites, high surface areas, and structural tunability have emerged as sensory devices for the detection of hazardous and toxic chemicals. Herein, recent progress regarding the mechanistic behavior of MOF sensors in the det...

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A benzene vapor sensor based on a metal-organic framework-modified quartz crystal microbalance

Cited by 73 publications

References 44 publications

Enhancing Formaldehyde Selectivity of SnO2 Gas Sensors with the ZSM-5 Modified Layers

Enhancing Formaldehyde Selectivity of SnO2 Gas Sensors with the ZSM-5 Modified Layers

A Comprehensive Overview on Advanced Sensing Applications of Functional Metal Organic Frameworks (MOFs)

Mechanistic Insight into Charge and Energy Transfers of Luminescent Metal–Organic Frameworks Based Sensors for Toxic Chemicals

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