The effect of the change in the amount of Sb doping in ZnO nanorods for hydrogen gas sensors

Kasapoğlu, Ahmet Emre; Habashyani, Saman; Baltakesmez, Ali; İskenderoğlu, Demet; Gür, Emre

doi:10.1016/j.ijhydene.2021.03.229

Cited by 35 publications

(4 citation statements)

References 44 publications

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“…The observed nature might be explained by the dopant agent's ionic radius fluctuation (Kaphle et al, 2018). The c-axis lattice of the doped ZnO NW was calculated using Bragg's law (Kasapoğlu et al, 2021). The expected lattice constants for c-films doped with aluminium, cobalt, chromium, iron, and magnesium were 5.195, 5.201, 5.198, 5.198, and 5.198 nm, respectively, according to our observations.…”

Section: Xrd Analysissupporting

confidence: 70%

Effect of doping on the structural properties of ZnO nanowires synthesised by ultrasonic-assisted immersion technique

Bakri,

Malek,

Mohammad

et al. 2023

MJCET

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Various procedures for producing high-quality zinc oxide (ZnO) nanowires (ZnO NWs) have been developed. Nevertheless, most of it rely on harsh circumstances such as high temperature, high pressure, costly materials, and complicated procedures. As a result, this study introduces an alternative ultrasonic-assisted immersion technique due to its many advantages such as low cost, ease of handling, and low energy consumption, as well as studying the effect of different precursors on the morphological, structural, and optical properties of the ZnO NWs, thus supporting and consolidating previous discoveries and providing a clearer understanding of the mechanism of ZnO formation. The most promising desirable features have been demonstrated for chromium doped ZnO NWs. Field emission scanning electron microscopy (FESEM) was used to examine the surface morphology of the samples, and x-ray diffraction (XRD) and UV-visible (UV-Vis) were utilised to investigate the structural and optical characteristics of the ZnO NWs. It was discovered that inserting Cr as a dopant for ZnO enhanced ZnO NWs by preventing quick electron-hole recombination, revealing it as the best dopant. This id due to reduced band gap (3.231 eV), relax strain (−0.2383%) and stress (0.560 GPa), and near zero porosities

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Section: Xrd Analysissupporting

confidence: 70%

Effect of doping on the structural properties of ZnO nanowires synthesised by ultrasonic-assisted immersion technique

Bakri,

Malek,

Mohammad

et al. 2023

MJCET

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“…Efforts to lower MOS operating temperatures without sacrificing sensitivity have focused on increasing surface-to-volume ratios. MOS microcubes, thin films and nanostructures such as nanoparticles, , nanospheres, , nanorods, nanowires, nanotubes, nanofilms, and nanoflowers, − all exhibit improved sensitivity at lower temperature. In addition, functionalizing the MOS surface with metals like Pd, Pt, or Ni nanoparticles greatly improves H 2 sensitivity.…”

Section: Metal Oxide Semiconductor Sensorsmentioning

confidence: 99%

Critical Sensing Modalities for Hydrogen: Technical Needs and Status of the Field to Support a Changing Energy Landscape

Swager,

Pioch,

Feng

et al. 2024

ACS Sens.

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Decarbonization of the energy system is a key aspect of the energy transition. Energy storage in the form of chemical bonds has long been viewed as an optimal scheme for energy conversion. With advances in systems engineering, hydrogen has the potential to become a low cost, low emission, energy carrier. However, hydrogen is difficult to contain, it exhibits a low flammability limit (>40000 ppm or 4%), low ignition energy (0.02 mJ), and it is a short-lived climate forcer. Beyond commercially available sensors to ensure safety through spot checks in enclosed environments, new sensors are necessary to support the development of low emission infrastructure for production, transmission, storage, and end use. Efficient scalable broad area hydrogen monitoring motivates lowering the detection limit below that (10 ppm) of best in class commercial technologies. In this perspective, we evaluate recent advances in hydrogen gas sensing to highlight technologies that may find broad utility in the hydrogen sector. It is clear in the near term that a sensor technology suite is required to meet the variable constraints (e.g., power, size/weight, connectivity, cost) that characterize the breadth of the application space, ranging from industrial complexes to remote pipelines. This perspective is not intended to be another standard hydrogen sensor review, but rather provide a critical evaluation of technologies with detection limits preferably below 1 ppm and low power requirements. Given projections for rapid market growth, promising techniques will also be amenable to rapid development in technical readiness for commercial deployment. As such, methods that do not meet these requirements will not be considered in depth.

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“…ZnO nanorods are an attractive material for gas sensors due to their high surface-to-volume ratio, which can aid in overcoming fundamental limitations. [60,61] Typically, these sensors are resistance-based, where the variations in the resistance on the surface of the ZnO electrode is measured at a set voltage. [25] The adsorption of oxygen present in the atmosphere onto the surface of the ZnO nanorods forms an electron-depleted surface layer, shown in Figure 4 below, which increases the surface resistivity in the sensor.…”

Section: Gas Sensorsmentioning

confidence: 99%

The Interplay of Growth Mechanism and Properties of ZnO Nanostructures for Different Applications

Clarke

Ghandi

2023

Small

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This review provides a background on the structure and properties of ZnO nanostructures. ZnO nanostructures are advantageous for many applications in sensing, photocatalysis, functional textiles, and cosmetic industries, which are described in this review. Previous work using UV Visible (UV–vis) spectroscopy and scanning electron microscopy (SEM) for ZnO nanorod growth analysis in‐solution and on a substrate for determination of optical properties and morphology is discussed, as well as their results in determining the kinetics and growth mechanisms. From this literature review, it is understood that the synthesis process greatly affects nanostructures and properties; and hence, their applications. In addition, in this review, the mechanism of ZnO nanostructure growth is unveiled, and it is shown that by having greater control over their morphology and size through such mechanistic understanding, the above‐mentioned applications can be affected. The contradictions and gaps in knowledge are summarized in order to highlight the variations in results, followed by suggestions for how to answer these gaps and future outlooks for ZnO nanostructure research.

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The effect of the change in the amount of Sb doping in ZnO nanorods for hydrogen gas sensors

Cited by 35 publications

References 44 publications

Effect of doping on the structural properties of ZnO nanowires synthesised by ultrasonic-assisted immersion technique

Effect of doping on the structural properties of ZnO nanowires synthesised by ultrasonic-assisted immersion technique

Critical Sensing Modalities for Hydrogen: Technical Needs and Status of the Field to Support a Changing Energy Landscape

The Interplay of Growth Mechanism and Properties of ZnO Nanostructures for Different Applications

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