Actinomorphic ZnO/SnO2 core–shell nanorods: Two-step synthesis and enhanced ethanol sensing propertied

Zhang, Bowen; Fu, Wuyou; Li, Huayang; Fu, Xinglin; Wang, Ying; Bala, Hari; Sun, Guang; Wang, Xiaodong; Wang, Yan; Cao, Jianliang; Zhang, Zhanying

doi:10.1016/j.matlet.2015.07.122

Cited by 17 publications

(4 citation statements)

References 16 publications

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“…In addition, core-shell nanostructures ensure a huge surface area and rapid gas diffusion, which is preferable to improve the gas-sensing characteristics of the sensor. Recently, many studies based on core-shell structure materials and their gas-sensing performances have been reported, as shown in Figure 11 [ 158 , 159 , 160 , 161 ]. As can be seen in some studies that contrast the responses, it is quite obvious that the gas-sensing performance is significantly improved with the introduction of core-shell structures.…”

Section: Core-shell Structure Of Semiconductor Oxide For Gas-sensimentioning

confidence: 99%

“… ( a ) TEM image of Au@ZnO core-shell nanoparticles; ( b ) TEM image of Co 3 O 4 /NiCo 2 O 4 core-shell nanocages; ( c ) SEM and TEM images of α-Fe 2 O 3 @SnO 2 core-shell nanotubes; ( d ) SEM and TEM images of ZnO/SnO 2 core-shell nanorods; ( e ) Response of sensors based on the pure ZnO and Au/ZnO core-shell nanoparticles to 100 ppm of H 2 ; ( f ) Response of sensors based on the Co 3 O 4 /NiCo 2 O 4 core-shell nanocages and Co 3 O 4 nanocages to 100 ppm acetone; ( g ) Variations of response (R a /R g ) for the α-Fe 2 O 3 /SnO 2 heterostructures, the pristine α-Fe 2 O 3 nanotubes and the SnO 2 nanoparticles to 100 ppm acetone at different operating temperatures; ( h ) the transient response curves of sensors (pure ZnO and ZnO/SnO 2 ) with different concentration of ethanol at 300 °C. Reprinted from [ 158 , 159 , 160 , 161 ] with permission; ( a , e ) [ 158 ] Copyright (2015) American Chemical Society; ( b , f ) [ 159 ] Copyright (2017) Elsevier; ( c , g ) [ 160 ] Copyright (2015) Elsevier; ( d , h ) [ 161 ] Copyright (2015) Elsevier. …”

Section: Figurementioning

confidence: 99%

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The Morphologies of the Semiconductor Oxides and Their Gas-Sensing Properties

Lin

et al. 2017

Sensors

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Semiconductor oxide chemoresistive gas sensors are widely used for detecting deleterious gases due to low cost, simple preparation, rapid response and high sensitivity. The performance of gas sensor is greatly affected by the morphology of the semiconductor oxide. There are many semiconductor oxide morphologies, including zero-dimensional, one-dimensional, two-dimensional and three-dimensional ones. The semiconductor oxides with different morphologies significantly enhance the gas-sensing performance. Among the various morphologies, hollow nanostructures and core-shell nanostructures are always the focus of research in the field of gas sensors due to their distinctive structural characteristics and superior performance. Herein the morphologies of semiconductor oxides and their gas-sensing properties are reviewed. This review also proposes a potential strategy for the enhancement of gas-sensing performance in the future.

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Section: Core-shell Structure Of Semiconductor Oxide For Gas-sensimentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

The Morphologies of the Semiconductor Oxides and Their Gas-Sensing Properties

Lin

et al. 2017

Sensors

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“…ZnO thin films exhibit good electrical conductivity, chemical stability, high ultraviolet (UV) absorption, and low toxicity [ 4 , 5 ]. Despite the unique physical and chemical properties, individual ZnO in the composition of chemoresistive gas sensors has some drawbacks: limited maximum sensitivity, low selectivity, high operating temperature, and long response and recovery times [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Obtaining of ZnO/Fe2O3 Thin Nanostructured Films by AACVD for Detection of ppb-Concentrations of NO2 as a Biomarker of Lung Infections

et al. 2023

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ZnO/Fe2O3 nanocomposites with different concentration and thickness of the Fe2O3 layer were obtained by two-stage aerosol vapor deposition (AACVD). It was shown that the ZnO particles have a wurtzite structure with an average size of 51–66 nm, and the iron oxide particles on the ZnO surface have a hematite structure and an average size of 23–28 nm. According to EDX data, the iron content in the films was found to be 1.3–5.8 at.%. The optical properties of the obtained films were studied, and the optical band gap was found to be 3.16–3.26 eV. Gas-sensitive properties at 150–300 °C were studied using a wide group of analyte gases: CO, NH3, H2, CH4, C6H6, ethanol, acetone, and NO2. A high response to 100 ppm acetone and ethanol at 225–300 °C and a high and selective response to 300–2000 ppb NO2 at 175 °C were established. The effect of humidity on the magnitude and shape of the signal obtained upon NO2 detection was studied.

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“…The motivation of choosing SnO x as a coating material on ZnO lies in the chemical stability of SnO x in a broad range of pH values, its wide bandgap (3.6 eV) with low n-type resistivity, and its good transparency that will not hinder, but will instead improve, the photoactivity of ZnO [25]. Previously, ZnO-SnO x core-shell nanorods or nanoparticles have been reported in such applications as optical instruments [26,27] and gas-sensing devices [28,29]. Chitosan-inorganic photocatalyst composites for the visible light-driven decontamination of wastewater, and for antimicrobial or antifouling applications using noble metals, metal oxides or metal chalcogenides in chitosan as support, are also reported [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

Kumar

Mazinani

et al. 2021

IJMS

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Functional nanocomposites with biopolymers and zinc oxide (ZnO) nanoparticles is an emerging application of photocatalysis in antifouling coatings. The reduced chemical stability of ZnO in the acidic media in which chitosan is soluble affects the performance of chitosan nanocomposites in antifouling applications. In this study, a thin shell of amorphous tin dioxide (SnOx) was grown on the surface of ZnO to form ZnO–SnOx core–shell nanoparticles that improved the chemical stability of the photocatalyst nanoparticles, as examined at pH 3 and 6. The photocatalytic activity of ZnO–SnOx in the degradation of methylene blue (MB) dye under visible light showed a higher efficiency than that of ZnO nanoparticles due to the passivation of electronic defects. Chitosan-based antifouling coatings with varying percentages of ZnO or ZnO–SnOx nanoparticles, with or without the glutaraldehyde (GA) crosslinking of chitosan, were developed and studied. The incorporation of photocatalysts into the chitosan matrix enhanced the thermal stability of the coatings. Through a mesocosm study using running natural seawater, it was found that chitosan/ZnO–SnOx/GA coatings enabled better inhibition of bacterial growth compared to chitosan coatings alone. This study demonstrates the antifouling potential of chitosan nanocomposite coatings containing core–shell nanoparticles as an effective solution for the prevention of biofouling.

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Actinomorphic ZnO/SnO2 core–shell nanorods: Two-step synthesis and enhanced ethanol sensing propertied

Cited by 17 publications

References 16 publications

The Morphologies of the Semiconductor Oxides and Their Gas-Sensing Properties

The Morphologies of the Semiconductor Oxides and Their Gas-Sensing Properties

Obtaining of ZnO/Fe2O3 Thin Nanostructured Films by AACVD for Detection of ppb-Concentrations of NO2 as a Biomarker of Lung Infections

Chitosan Nanocomposite Coatings Containing Chemically Resistant ZnO–SnOx Core–shell Nanoparticles for Photocatalytic Antifouling

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