ZnO nanoarrays <i>via</i> a thermal decomposition–deposition method for sensitive and selective NO<sub>2</sub> detection

Lou, Chengming; Wang, Kai; Mei, Houshan; Xie, Jiayue; Zheng, Wei; Liu, Xianghong; Zhang, Jun

doi:10.1039/d1ce00410g

Cited by 49 publications

(16 citation statements)

References 58 publications

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“…26,27 The first method involves doping metal oxides with nanoparticles of noble metals or creating composites out of other metal oxides. 28,29 Although this approach improves the sensor performance, it fails to make sensors fully selective. 30 However, sensors can also be trained to recognize patterns to identify unknown VOCs.…”

Section: Introductionmentioning

confidence: 99%

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

Verma

Yadav

2023

ACS Appl. Nano Mater.

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The main aim of this research investigation is to evaluate the acetone-sensing performance of the heterostructured nanohybrid of WO3/WS2 by its constituents, two-dimensional (2D), WO3 and WS2 for use in biomedical to industrial-level utilization. Using a rapid chemiresistive sensor to examine the level of acetone in an individual’s exhaled breath shows potential for identifying diabetes in humans. The prepared nanosheets were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD) pattern, UV–visible spectroscopy, and Fourier transform infrared (FTIR) analysis. XPS results confirm the presence of W4+ and W6+ oxidation states with overlapped peaks, revealing the formation of a 2D/2D nanosheet-like system of the WO3/WS2 heterostructure. Sensing results show sensor responses of 132.5 and 17.0 at acetone concentrations of 1000 and 1 ppm, respectively, signifying the utilization of this sensor device for biomedical and industrial-scale applications. The limit of detection (LOD) for the biomedical range was found to be 1.54 ppm, whereas for the industrial scale, the LOD was found to be 21.02 ppm. Exhaled breath-based analysis suggests that this sensing device can also be employed for continuous exhaled breath monitoring. For example, a WO3/WS2-based heterostructured device shows a sensor response of 98.7 to exhaled breath containing only 8 vol %, demonstrating excellent capability for continuous breath monitoring. Density functional theory (DFT) predicts the reason behind the selective detection of acetone with a sensor response of 46.98%.

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Section: Introductionmentioning

confidence: 99%

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

Verma

Yadav

2023

ACS Appl. Nano Mater.

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“…Due to their high surface-to-volume ratio, abundant molecular adsorption sites and high carrier mobility, one-dimensional (1D) metal oxide nanostructures such as nanowires and nanorods have demonstrated great potential in nanodevices, especially in the field of chemical sensors. 5–8 Manipulating 1D units into three-dimensional (3D) nanoarray structures further enhances their application potential in chemical sensors. 7,9,10 These 3D nanoarray structures can greatly improve the adsorption, reaction and diffusion of molecules due to the abundant space between 1D building blocks, thereby exhibiting better sensing performance.…”

Section: Introductionmentioning

confidence: 99%

“…5–8 Manipulating 1D units into three-dimensional (3D) nanoarray structures further enhances their application potential in chemical sensors. 7,9,10 These 3D nanoarray structures can greatly improve the adsorption, reaction and diffusion of molecules due to the abundant space between 1D building blocks, thereby exhibiting better sensing performance. 11…”

Section: Introductionmentioning

confidence: 99%

Rational design of ZnO@ZIF-8 nanoarrays for improved electrochemical detection of H₂O₂

Mei

Xie

et al. 2022

CrystEngComm

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“…Metal oxides have been widely utilized for NO 2 gas sensors; however, these metal oxides only work effectively at high temperatures. − Among the III-nitride semiconductor family, indium gallium nitride (InGaN) has become the cornerstone for optoelectronic materials due to its appealing electrical properties. The strong electron accumulation on the surface walls of InGaN is a key feature that promotes high surface conductivity .…”

Section: Introductionmentioning

confidence: 99%

Feather-Shaped InGaN Nanorods for Selective ppb-Level Detection of NO₂ Gas at Room Temperature

Thota

Reddeppa

Pasupuleti

et al. 2021

ACS Appl. Nano Mater.

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Materials with peculiar nanostructures enclosing the surface play a pivotal role in a variety of applications, especially gas-sensing applications, due to their high surface-to-volume ratio. In this study, we tailored the nanorod (NR) morphology of InGaN into various unusual shapes such as bud, mace, and feather shapes and investigated the gas-sensing abilities of these structures. Remarkably, tuning the NR morphology significantly enhanced the NO2 gas response, with the feather-shaped morphology showing the best performance. The feather-shaped InGaN NRs displayed a response of 72.64% to 100 ppm NO2 gas, which is not only four times that of pristine InGaN NRs but also the highest response so far compared to that among state-of-the-art InGaN- or GaN-based NO2 gas sensors. Furthermore, photon-assisted sensing stimulated the responses of feather-shaped InGaN NRs, with the limit of detection extending to 200 ppb (6.12%). In addition, feather-shaped InGaN NRs were more selective to NO2 gas than to other target gases such as H2S, H2, NH3, and CO. The growth mechanisms of the different morphologies, as well as their enhanced NO2 gas responses, were successfully demonstrated. This morphology engineering strategy can be extended to design III-nitrides of different shapes for excellent gas-sensing applications.

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ZnO nanoarrays via a thermal decomposition–deposition method for sensitive and selective NO₂ detection

Abstract: ZnO nanoarrays deposited by a thermal decomposition–deposition (TDD) strategy demonstrate a high response for NO2 detection.

Cited by 49 publications

References 58 publications

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

Rational design of ZnO@ZIF-8 nanoarrays for improved electrochemical detection of H₂O₂

Feather-Shaped InGaN Nanorods for Selective ppb-Level Detection of NO₂ Gas at Room Temperature

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ZnO nanoarrays via a thermal decomposition–deposition method for sensitive and selective NO2 detection

Abstract: ZnO nanoarrays deposited by a thermal decomposition–deposition (TDD) strategy demonstrate a high response for NO2 detection.

Cited by 49 publications

References 58 publications

2D/2D Nanostructured System Based on WO3/WS2 for Acetone Sensor and Breath Analyzer

2D/2D Nanostructured System Based on WO3/WS2 for Acetone Sensor and Breath Analyzer

Rational design of ZnO@ZIF-8 nanoarrays for improved electrochemical detection of H2O2

Feather-Shaped InGaN Nanorods for Selective ppb-Level Detection of NO2 Gas at Room Temperature

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Product

Resources

About

ZnO nanoarrays via a thermal decomposition–deposition method for sensitive and selective NO₂ detection

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

Rational design of ZnO@ZIF-8 nanoarrays for improved electrochemical detection of H₂O₂

Feather-Shaped InGaN Nanorods for Selective ppb-Level Detection of NO₂ Gas at Room Temperature