Current Advances of CO Sensing Based on Low Dimensional Materials

Zhang, Yundi; Liu, Jie; Rong, Changru; Wang, Deping; Li, Weifeng; Gao, Zhenhai; Chen, Yupeng

doi:10.1021/acs.langmuir.4c01861

Langmuir

2024

DOI: 10.1021/acs.langmuir.4c01861

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Current Advances of CO Sensing Based on Low Dimensional Materials

Yundi Zhang,

Jie Liu,

Changru Rong

et al.

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Cited by 4 publications

References 102 publications

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Rational MOF Membrane Design for Gas Detection in Complex Environments

Kong,

Yu,

Chen

et al. 2024

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Metal‐organic frameworks (MOFs) hold significant promise in the realm of gas sensing. However, current understanding of their sensing mechanisms remains limited. Furthermore, the large‐scale fabrication of MOFs is hampered by their inadequate mechanical properties. These two challenges contribute to the sluggish development of MOF‐based gas‐sensing materials. In this review, the selection of metal ions and organic ligands for designing MOFs is first presented, deepening the understanding of the interactions between different metal ions/organic ligands and target gases. Subsequently, the typical interfacial synthesis strategies (gas‐solid, gas‐liquid, solid‐liquid interfaces) are provided, highlighting the potential for constructing MOF membranes on superhydrophobic and/or superhydrophilic substrates. Then, a multi‐scale structure design strategies is proposed, including multi‐dimensional membrane design and heterogeneous membrane design, to improve sensing performance through enhanced interfacial mass transfer and specific gas sieving. This strategy is anticipated to augment the task‐specific capabilities of MOF‐based materials in complex environments. Finally, several key future research directions are outlined with the aim not only to further investigate the underlying sensing principles of MOF membranes but also to achieve efficient detection of target gases amidst interfering gases and elevated moisture levels.

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Rational MOF Membrane Design for Gas Detection in Complex Environments

Kong,

Yu,

Chen

et al. 2024

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Nanomaterials‐Enabled Sensors for Detecting and Monitoring Chemical Warfare Agents

Kilani,

Mao

2024

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Despite their restrictions under international treaties, many chemical warfare agents (CWAs) and their toxic analogues are still used in various industrial sectors such as agriculture and chemical manufacturing. Thus, the need for sensitive and selective CWA detection remains critical. Commercially available detection methods, while accurate, are often bulky, expensive, and require specialized personnel. Sensors incorporating nanomaterials present a promising alternative, offering rapid, portable, and cost‐effective detection due to their unique properties, such as high surface area and tunable reactivity. This review covers the four main CWA categories: nerve agents, blister agents, blood agents, and choking agents, highlighting recent progress in nanosensor development for each category. It discusses various sensing mechanisms employed, including fluorescence, colorimetry, chemiresistivity, electrochemistry, and Raman spectroscopy. Despite these advancements, challenges remain, particularly regarding the scalability, stability, and selectivity of nanomaterials‐based sensors in complex environments. The review concludes by emphasizing the need to address these challenges and explore novel nanomaterials, the development of scalable nanomanufacturing techniques, and the integration of artificial intelligence to fully unlock the potential of nanomaterials in CWA sensing for homeland security and personal safety.

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Multiscale Covalent Organic Framework (COF) Films for Task-Specific Sensing in Multicomponent Gases

Yu,

Xu,

Zhao

et al. 2024

ACS Materials Lett.

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Gas sensing is vital for ecological protection in agriculture, early disease diagnosis in biomedicine, and safety in industrial production. Covalent organic frameworks (COFs), a new class of porous polymer materials, can be customized through specific ligand selection to tailor pore sizes and active sites, enabling them to selectively enrich and interact with targeted gas molecules, making them promising candidates for gas sensing. To advance their use in this field, it is essential to investigate the mechanisms of the complex interactions between COFs and target molecules as well as to improve COF film fabrication methods. This review outlines design strategies for COF films across multiscale: molecular interaction mechanisms, macroscopic interfacial synthesis methods, and microscale/nanoscale approaches such as double-layer films for filtration and micro/ nanostructured films for improved gas transfer. Finally, several key research directions are proposed to improve the suitability of COF-based materials for gas sensing in complex environments.

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Current Advances of CO Sensing Based on Low Dimensional Materials

Cited by 4 publications

References 102 publications

Rational MOF Membrane Design for Gas Detection in Complex Environments

Rational MOF Membrane Design for Gas Detection in Complex Environments

Nanomaterials‐Enabled Sensors for Detecting and Monitoring Chemical Warfare Agents

Multiscale Covalent Organic Framework (COF) Films for Task-Specific Sensing in Multicomponent Gases

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