Highly electron-depleted ZnO/ZnFe2O4/Au hollow meshes as an advanced material for gas sensing application

Li, Xiaowei; Han, Chaohan; Lu, Dongxiao; Shao, Changlu; Liu, Yichun

doi:10.1016/j.snb.2019.126769

Cited by 47 publications

(22 citation statements)

References 63 publications

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“…Electrons tend to move from a material with a lower work function to a material with a higher work function. 11 Electrons transfer from ZnO to Au as the work function of Au ( W m = 5.1 eV) 51 is higher than that of ZnO ( W s = 4.2 eV). 11 When Au–ZnO is exposed to air, it is easier for the electrons captured by oxygen molecules to form a thicker electron depletion layer, leading to more adsorbed O − and larger resistance, thus leading to a higher response when contacted with TEA gas.…”

Section: Resultsmentioning

confidence: 99%

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Chen

Wang

et al. 2022

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Chen

Wang

et al. 2022

J. Mater. Chem. C

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“…Besides, the sensor comprising Pd@Co 3 O 4 −ZnO showed clear cross‐selectivity for other gases such as ethanol, formaldehyde, and isopropanol. In another work, Li and coworkers [100] reported ZnO/ZnFe 2 O 4 /Au nanomeshes fabricated via combining room‐temperature solution reaction methods and electrospinning, atomic layer deposition. It was found that the response of ZnO/ZnFe 2 O 4 /Au towards acetone was enhanced about 3‐fold versus the ZnO/ZnFe 2 O 4 nanocomposites and 5‐fold versus bare ZnO.…”

Section: Metal Oxide/zno Heterostructurementioning

confidence: 99%

Zinc Oxide‐Based Acetone Gas Sensors for Breath Analysis: A Review

Drmosh

Alade

Qamar

et al. 2021

Chemistry An Asian Journal

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Acetone is one of the toxic, explosive, and harmful gases. It may cause several health hazard issues such as narcosis and headache. Acetone is also regarded as a key biomarker to diagnose several diseases as well as monitor the disorders in human health. Based on clinical findings, acetone concentration in human breath is correlated with many diseases such as asthma, halitosis, lung cancer, and diabetes. Thus, its investigation can become a new approach for health monitoring. Better management at the early stages of such diseases has the potential not only to reduce deaths associated with the disease but also to reduce medical costs. ZnO−based sensors show great potential for acetone gas due to their high chemical stability, simple synthesis process, and low cost. The findings suggested that the acetone sensing performance of such sensors can be significantly improved by manipulating the microstructure (surface area, porosity, etc.), composition, and morphology of ZnO nanomaterials. This article provides a comprehensive review of the state‐of‐the‐art research activities, published during the last five years (2016 to 2020), related to acetone gas sensing using nanostructured ZnO (nanowires, nanoparticles, nanorods, thin films, etc). It focuses on different types of nanostructured ZnO‐based acetone gas sensors. Furthermore, several factors such as relative humidity, acetone concentrations, and operating temperature that affects the acetone gas sensing properties‐ sensitivity, long‐term stability, selectivity as well as response and recovery time are discussed in this review. We hope that this work will inspire the development of high‐performance acetone gas sensors using nanostructured materials.

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“…The function relationship between debye length and shell thickness clearly shows the influence of noble metal modification on resistance modulation (Figure 10b). Li et al [108] reported that the ultrathin thickness of ZnO nanotube and ZnFe 2 O 4 nanosheet is close to the length of ZnO debye (20-60 nm), and most of the electrons in the material are exhausted. The formation of interface heterojunctions can further increase the initial depletion layer.…”

Section: P E R S O N a L A C C O U N T T H E C H E M I C A L R E C O R Dmentioning

confidence: 99%

Advances in Doped ZnO Nanostructures for Gas Sensor

Wang

Gong

et al. 2020

The Chemical Record

117

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Gas sensors based on metal oxides semiconductor (MOS) have attracted extensive attention from both academic and industry. ZnO, as a typical MOS, exhibits potential applications in toxic gas detection, owning to its wide band gap, n-type transport characteristic and excellent electrical performance. Meanwhile, doping is an effective way to improve the sensing performance of ZnO materials. In this review, the effects of different types of doping on morphology, crystal structure, band gap and depletion layer of ZnO materials are comprehensively discussed. Theoretical analysis on the strategies for enhancing the sensing properties of ZnO is also provided. This review puts forward the reasonable insight for designing efficient n-type ZnO-based semiconductor oxide sensing materials.

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Highly electron-depleted ZnO/ZnFe2O4/Au hollow meshes as an advanced material for gas sensing application

Cited by 47 publications

References 63 publications

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Zinc Oxide‐Based Acetone Gas Sensors for Breath Analysis: A Review

Advances in Doped ZnO Nanostructures for Gas Sensor

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