Metal-organic frameworks-derived hollow zinc oxide/cobalt oxide nanoheterostructure for highly sensitive acetone sensing

Zhang, Dongzhi; Yang, Zhiliang; Wu, Zhengfang; Dong, Guokang

doi:10.1016/j.snb.2018.11.133

Cited by 165 publications

(63 citation statements)

References 68 publications

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“…According to the reported literatures, the sensing mechanism of oxide semiconductor based sensor can be explained by the following chemical reactions:

true normalO_{2} (gas) \to normalO_{2} (ads)

true normalO_{2} (ads) + normale^{-} \to normalO_{2}^{-} (ads)

true normalO_{2}^{-} (ads) + normale^{-} \to 2 O^{-} (ads)

true CH_{3} COCH_{3} (gas) + 8 O^{-} (ads) \to 3 CO_{2} (gas) + 3 H_{2} normalO (gas) + 8 e^{-}

…”

Section: Resultsmentioning

confidence: 99%

Porous ZIF‐8 Thin Layer Coating on ZnO Hollow Nanofibers for Enhanced Acetone Sensing

et al. 2020

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Metal oxide semiconductors have been extensively studied in detecting volatile organic compounds due to their low cost, good operability and ease of fabrication. However, sensitivity and selectivity are still huge challenges for commercial metal oxide semiconductor based gas sensor. Herein, nanostructured ZnO hollow fiber coated with porous zeolitic imidazolate framework‐8 (ZIF‐8) thin layers was developed as a new sensing platform to improve the performance of semiconductor‐based gas sensor. It is shown that the resulting ZnO@ZIF‐8 hollow nanofiber exhibited significant improvement of acetone sensitivity and selectivity as well as good long‐term stability, owing to the high sensitivity of nanostructured ZnO hollow fibers and the good selectivity of porous ZIF‐8 thin layers. Furthermore, the orientation growth of ZIF‐8 layer on ZnO nanofibers also affected the gas sensing response to acetone. Thus, this study presents a novel way of building semiconductor@metal‐organic frameworks hollow nanostructures to enhance gas response and selectivity of semiconductor‐based gas sensors, and exhibits great potential in fabricating new generation gas sensors.

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“…According to the reported literatures, the sensing mechanism of oxide semiconductor based sensor can be explained by the following chemical reactions:

true normalO_{2} (gas) \to normalO_{2} (ads)

true normalO_{2} (ads) + normale^{-} \to normalO_{2}^{-} (ads)

true normalO_{2}^{-} (ads) + normale^{-} \to 2 O^{-} (ads)

true CH_{3} COCH_{3} (gas) + 8 O^{-} (ads) \to 3 CO_{2} (gas) + 3 H_{2} normalO (gas) + 8 e^{-}

…”

Section: Resultsmentioning

confidence: 99%

Porous ZIF‐8 Thin Layer Coating on ZnO Hollow Nanofibers for Enhanced Acetone Sensing

et al. 2020

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“…In the literature, we can observe some works related to the nanocomposites of zinc oxide and cobalt oxide. Zhang et al synthesized ZnO-Co 3 O 4 nanocomposites by chemical method for acetone sensing applications in which they obtained a morphology of hollow polyhedron shape [26] . In another work with Co metal and zinc oxide, the morphology appeared as core–shell [27] .…”

Section: Resultsmentioning

confidence: 99%

A simple synthesis of ZnO:Co2O3 nanocomposites by pulsed laser irradiation in liquid

Kanakkillam

Krishnan

Avellaneda

et al. 2020

Materials Today: Proceedings

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Highlights ZnO:Co 2 O 3 nanocomposites by pulsed laser irradiation in water. Morphology was modified by laser irradiation and Co 2 O 3 content. Elemental composition and their chemical states were confirmed by XPS. Nanocomposites showed higher visible light absorption compared to ZnO. Thin films of the ZnO:Co 2 O 3 nanocomposites showed visible light photocatalysis.

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“…[24][25][26] With this regards, one of the more promising sensitive and selective metal oxide gas sensing candidates to emerge is zinc oxide (ZnO) for acetone sensing. 27,28 In the present investigation, we demonstrate the new approach of developing graphene/Ag/ZnO nanocomposites through medicinal plant extract, thereby their gas sensing prociency towards reducing gases and volatile organic compounds (VOCs). The purpose of using Ag is to facilitate the spill-over mechanism, whereas graphene is used to enhance the electrical conductivity and surface area, needed for better gas sensing property.…”

mentioning

confidence: 90%

A greener approach towards the development of graphene–Ag loaded ZnO nanocomposites for acetone sensing applications

et al. 2019

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Metal-organic frameworks-derived hollow zinc oxide/cobalt oxide nanoheterostructure for highly sensitive acetone sensing

Cited by 165 publications

References 68 publications

Porous ZIF‐8 Thin Layer Coating on ZnO Hollow Nanofibers for Enhanced Acetone Sensing

Porous ZIF‐8 Thin Layer Coating on ZnO Hollow Nanofibers for Enhanced Acetone Sensing

A simple synthesis of ZnO:Co2O3 nanocomposites by pulsed laser irradiation in liquid

A greener approach towards the development of graphene–Ag loaded ZnO nanocomposites for acetone sensing applications

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