Low-temperature operating ZnO-based NO<sub>2</sub> sensors: a review

Xuan, Jingyue; Zhao, Guodong; Sun, Meiling; Jia, Fuchao; Wang, Xiaomei; Zhou, Tong; Yin, Guangchao; Liu, Bo

doi:10.1039/d0ra07328h

Cited by 114 publications

(48 citation statements)

References 141 publications

(138 reference statements)

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“…This depletion layer is formed near the interface, which leads to increase the Ra value (resistance in air). Therefore, the response gets increased 23 . In the following, the comparison Table 3 is made to describe the present work status with the state-of-art literature.…”

Section: Resultsmentioning

confidence: 99%

RGO/WO3 hierarchical architectures for improved H2S sensing and highly efficient solar-driving photo-degradation of RhB dye

Mehta

Nadargi

Tamboli

et al. 2021

Sci Rep

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Surface area and surface active sites are two important key parameters in enhancing the gas sensing as well as photocatalytic properties of the parent material. With this motivation, herein, we report a facile synthesis of Reduced Graphene Oxide/Tungsten Oxide RGO/WO3 hierarchical nanostructures via simple hydrothermal route, and their validation in accomplishment of improved H2S sensing and highly efficient solar driven photo-degradation of RhB Dye. The self-made RGO using modified Hummer’s method, is utilized to develop the RGO/WO3 nanocomposites with 0.15, 0.3 and 0.5 wt% of RGO in WO3 matrix. As-developed nanocomposites were analyzed using various physicochemical techniques such as XRD, FE-SEM, TEM/HRTEM, and EDAX. The creation of hierarchic marigold frameworks culminated in a well affiliated mesoporous system, offering efficient gas delivery networks, leading to a significant increase in sensing response to H2S. The optimized sensor (RGO/WO3 with 0.3 wt% loading) exhibited selective response towards H2S, which is ~ 13 times higher (Ra/Rg = 22.9) than pristine WO3 (Ra/Rg = 1.78) sensor. Looking at bi-directional application, graphene platform boosted the photocatalytic activity (94% degradation of Rhodamine B dye in 210 min) under natural sunlight. The RGO’s role in increasing the active surface and surface area is clarified by the H2S gas response analysis and solar-driven photo-degradation of RhB dye solution. The outcome of this study provides the new insights to RGO/WO3 based nanocomposites’ research spreadsheet, in view of multidisciplinary applications.

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Section: Resultsmentioning

confidence: 99%

RGO/WO3 hierarchical architectures for improved H2S sensing and highly efficient solar-driving photo-degradation of RhB dye

Mehta

Nadargi

Tamboli

et al. 2021

Sci Rep

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“…For oxidizing gas, the gas sensing response for n-type (S n ox ) and p-type (S p ox ) semiconducting oxide is generally explained by these equations (13)(14):…”

Section: The Gas Sensing Mechanism Of Mos-based Sensorsmentioning

confidence: 99%

Metal oxide nanomaterial-based sensors for monitoring environmental NO₂and its impact on the plant ecosystem: a review

et al. 2022

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“…Here, the NO 2 sensor based on ZnO nanostructures requires a response and recovery time of a few minutes, but using light irradiation could improve the response and recovery characteristics. 50 Fig. 6C shows the temperature dependence of sensor response for the detection of 100 ppb, 250 ppb, 500 ppb, 1 ppm, and 2 ppm of NO 2 gas.…”

Section: Electrical and Gas Sensing Propertiesmentioning

confidence: 99%

Hollow ZnO nanorices prepared by a simple hydrothermal method for NO₂ and SO₂ gas sensors

et al. 2021

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Low-temperature operating ZnO-based NO₂ sensors: a review

Abstract: A comprehensive review on designs and mechanisms of ZnO-based NO2 gas sensors operated at low temperature.

Cited by 114 publications

References 141 publications

RGO/WO3 hierarchical architectures for improved H2S sensing and highly efficient solar-driving photo-degradation of RhB dye

RGO/WO3 hierarchical architectures for improved H2S sensing and highly efficient solar-driving photo-degradation of RhB dye

Metal oxide nanomaterial-based sensors for monitoring environmental NO₂and its impact on the plant ecosystem: a review

Hollow ZnO nanorices prepared by a simple hydrothermal method for NO₂ and SO₂ gas sensors

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Low-temperature operating ZnO-based NO2 sensors: a review

Abstract: A comprehensive review on designs and mechanisms of ZnO-based NO2 gas sensors operated at low temperature.

Cited by 114 publications

References 141 publications

RGO/WO3 hierarchical architectures for improved H2S sensing and highly efficient solar-driving photo-degradation of RhB dye

RGO/WO3 hierarchical architectures for improved H2S sensing and highly efficient solar-driving photo-degradation of RhB dye

Metal oxide nanomaterial-based sensors for monitoring environmental NO2and its impact on the plant ecosystem: a review

Hollow ZnO nanorices prepared by a simple hydrothermal method for NO2 and SO2 gas sensors

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Low-temperature operating ZnO-based NO₂ sensors: a review

Metal oxide nanomaterial-based sensors for monitoring environmental NO₂and its impact on the plant ecosystem: a review

Hollow ZnO nanorices prepared by a simple hydrothermal method for NO₂ and SO₂ gas sensors