Porous materials as effective chemiresistive gas sensors

Sharma, Akashdeep; Eadi, Sunil Babu; Noothalapati, Hemanth; Otyepka, Michal; Lee, Hi-Deok; Jayaramulu, Kolleboyina

doi:10.1039/d2cs00761d

Cited by 35 publications

(2 citation statements)

References 379 publications

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“…The subsequent sections will delve into the structural evolution of MOFs, highlighting key innovations and comparative analyses with traditional chemiresistive materials. Although numerous MOFs and their composites have been studied as chemiresistors, − this spotlight aims to highlight recent advances in the design principles that guide the construction of efficient MOF-based systems operating at challenging conditions, such as room temperature. Therefore, we categorized these materials into three distinctive groups (Figure ).…”

Section: Introductionmentioning

confidence: 99%

Advancing Metal–Organic Framework Designs for Room-Temperature Chemiresistive Gas Sensors

Kim,

Pander,

Moon

2024

ACS Appl. Electron. Mater.

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Metal−organic frameworks (MOFs) represent a versatile class of porous reticular materials whose structures and properties can be precisely tailored for targeted applications. A prominent example of such an application is the chemiresistive sensing of gases, where MOFs exhibit robust responses even at room temperature, thereby demonstrating their potential for practical utilization. This feature article reviews the development of the design criteria that are crucial for the optimization of MOFs as room-temperature chemiresistors. To highlight key advancements in this field, we categorize these materials into three distinct groups to (1) 2D conductive MOFs, (2) composites of MOFs with other materials, and (3) MOF-on-MOF architectures. The representative achievements from each group are discussed to demonstrate research progress in the construction of these innovative materials and their performance in gas sensing. Special emphasis is placed on the MOF-on-MOF materials, underscoring their role as pioneering smart materials for targeted application.

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Section: Introductionmentioning

confidence: 99%

Advancing Metal–Organic Framework Designs for Room-Temperature Chemiresistive Gas Sensors

Kim,

Pander,

Moon

2024

ACS Appl. Electron. Mater.

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“…25 Consequently, significant efforts have been devoted to exploring MOS-based sensors operating at room temperature (RT). Strategies such as incorporating conductive polymers, 26 doping noble metals, 27 constructing heterostructures, 28 utilizing light activation, 29 and exploring porous materials 30 have been reported.…”

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confidence: 99%

Visible Light-Activated Room Temperature NO₂ Gas Sensing Based on the In₂O₃@ZnO Heterostructure with a Hollow Microtube Structure

Li,

Wei,

Liu

et al. 2024

ACS Sens.

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The persistent challenge of poor recovery characteristics of NO 2 sensors operated at room temperature remains significant. However, the development of In 2 O 3 -based gas sensing materials provides a promising approach to accelerate response and recovery for sub-ppm of NO 2 detection at room temperature. Herein, we propose a simple two-step method to synthesize a onedimensional (1D) In 2 O 3 @ZnO heterostructure material with hollow microtubes, by coupling metal−organic frameworks (MOFs) (MIL-68 (In)) and zinc ions. Meanwhile, the In 2 O 3 @ ZnO composite-based gas sensor exhibits superior sensitivity performance to NO 2 under visible light activation. The response value to 5 ppm of NO 2 at room temperature is as high as 1800, which is 35 times higher than that of the pure In 2 O 3 -based sensor. Additionally, the gas sensor based on the In 2 O 3 @ZnO heterostructure demonstrates a significantly reduced response/recovery time of 30 s/67 s compared to the sensor based on pure In 2 O 3 (74 s/235 s). The outstanding gas sensing properties of the In 2 O 3 @ZnO heterostructure-based sensors can be attributed to the enhanced photogenerated charge separation efficiency resulting from the heterostructure effect, and the improved receptor function toward NO 2 , which can increase the reactive sites and gas adsorption capacity. In summary, this work proposes a low-cost and efficient method to synthesize a 1D heterostructure material with microtube structures, which can serve as a fundamental technique for developing high-performance room-temperature gas sensors.

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Metal‐Organic Frameworks for Emerging Thermoelectric Applications

Park,

Kang

2024

Adv Eng Mater

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Metal‐organic frameworks (MOFs) have emerged as highly promising porous materials for various applications due to their exceptional porosity, large surface areas, and tunable functional properties. Recently, MOFs have garnered attention as potential thermoelectric materials that convert heat into electricity, offering environmentally friendly energy solutions. This perspective highlights recent research on thermoelectric MOFs and MOF‐based composites, exploring synthesis methods and strategies for enhancing their thermoelectric performance and future directions.

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Porous materials as effective chemiresistive gas sensors

Abstract: This review emphasizes the crucial role of chemiresistive gas sensors (CGS) in gas detection. It underscores porous materials as alternatives, showcasing their exceptional attributes. The review explores CGS-based porous materials in real-life applications.

Cited by 35 publications

References 379 publications

Advancing Metal–Organic Framework Designs for Room-Temperature Chemiresistive Gas Sensors

Advancing Metal–Organic Framework Designs for Room-Temperature Chemiresistive Gas Sensors

Visible Light-Activated Room Temperature NO₂ Gas Sensing Based on the In₂O₃@ZnO Heterostructure with a Hollow Microtube Structure

Metal‐Organic Frameworks for Emerging Thermoelectric Applications

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Porous materials as effective chemiresistive gas sensors

Abstract: This review emphasizes the crucial role of chemiresistive gas sensors (CGS) in gas detection. It underscores porous materials as alternatives, showcasing their exceptional attributes. The review explores CGS-based porous materials in real-life applications.

Cited by 35 publications

References 379 publications

Advancing Metal–Organic Framework Designs for Room-Temperature Chemiresistive Gas Sensors

Advancing Metal–Organic Framework Designs for Room-Temperature Chemiresistive Gas Sensors

Visible Light-Activated Room Temperature NO2 Gas Sensing Based on the In2O3@ZnO Heterostructure with a Hollow Microtube Structure

Metal‐Organic Frameworks for Emerging Thermoelectric Applications

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Visible Light-Activated Room Temperature NO₂ Gas Sensing Based on the In₂O₃@ZnO Heterostructure with a Hollow Microtube Structure