Rapid synthesis of ZnO dandelion-like nanostructures and their applications in humidity sensing and photocatalysis

Hsu, Nai-Feng; Chang, Ming; Hsu, Kuei-Ting

doi:10.1016/j.mssp.2013.09.019

Cited by 30 publications

(12 citation statements)

References 26 publications

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“…The wurtzite structure is most stable at room temperature and therefore the most common and intensively investigated for environmental remediation and photovoltaic power production. A great disadvantage of ZnO is the photocorrosion as well as the low photocatalytic efficiency because of its weak visible light absorption and low photocatalytic quantum efficiency, which are caused from fast recombination of photo-generated carriers [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Rapid synthesis of ZnO nano-corncobs from Nital solution and its application in the photodegradation of methyl orange

Gómez-Solís

Ballesteros

Torres-Martı́nez

et al. 2015

Journal of Photochemistry and Photobiology A: Chemistry

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Section: Introductionmentioning

confidence: 99%

Rapid synthesis of ZnO nano-corncobs from Nital solution and its application in the photodegradation of methyl orange

Gómez-Solís

Ballesteros

Torres-Martı́nez

et al. 2015

Journal of Photochemistry and Photobiology A: Chemistry

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“…The nano-scale structure in ZnO is very important in humidity detection due to larger surfaceto-volume ratio and chemically reactive surface. According to Hsu et al [44], the nanostructured surface of ZnO consists of high concentrations of oxygen vacancies, which provides highly active sites for water molecules adsorption. In their study, they fabricated ZnO dandelion-like nanostructures using a two-step thermal oxidation method, reporting increment in oxygen vacancies as the deposition temperature increased, which in-turn led to enhancement of humidity sensitivity.…”

Section: Zno Nanostructure-based Humidity Sensorsmentioning

confidence: 99%

Aluminum- and Iron-Doped Zinc Oxide Nanorod Arrays for Humidity Sensor Applications

Ismail¹,

Mamat²,

Mahmood³

2017

Nanostructured Materials - Fabrication to Applications

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Metal-doped zinc oxide (ZnO) nanorod arrays have attracted much attention due to improvement in their electrical, structural, and optical properties upon doping. In this chapter, we discuss the effects of aluminum (Al)-and iron (Fe)-doping on ZnO nanorod arrays properties particularly for humidity sensor applications. Compared to Fe, Al shows more promising characteristics as doping element for ZnO nanorod arrays. The Al-doped ZnO nanorod arrays showed dense arrays, small nanorods diameter, and high porous surface. The I-V characteristics showed that Al-doped sample possesses higher conductivity. From the humidity sensing performance of the samples, Al-doped ZnO nanorod arrays possess the superior sensitivity, more than two times higher than that of the undoped ZnO nanorod arrays sample, demonstrating great potential of Al-doped ZnO nanorod arrays in humidity sensor applications.

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“…Therefore, both intrinsic properties and pore properties of sensing materials affect the variation in electrical conductivity with humidity. In order to achieve the desired properties such as high sensitivity, fast response, broad humidity sensing range, and linear response, most researchers are increasingly paying their attention to the exploitation of new materials through fabricating new atomic compositions, varying dopants, changing synthesis methods to create versatile morphology of the particles, etc . Little attention has been paid to study how to control the porosity of the sensing films by the preparation process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microstructure of ZnO Nanorod Film on Humidity Sensing

2015

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In this study, a simple thick-film humidity sensor was fabricated by coating wet-synthesized ZnO nanorods on screenprinting interdigitated electrodes. We investigated the influence of the coating procedure on the microstructure of ZnO nanorod films and thereby on humidity sensing. The experimental results revealed that the specific surface area (SSA) decreased and the average pore size (APS) increased with increasing the sintering time and the number of coating layer. The humidity response depended significantly on the pore properties of the ZnO nanorod films. By virtue of the incipient wetness analysis, it was found that the adsorption of water molecules on the ZnO surface led to the decrease in electrical resistance even though the ZnO was rod like, n-type semiconductor. While tuning the pore structure of the ZnO nanorod film, the thick-film humidity sensor might display near-linear response in the full range of 0%-100% relative humidity (RH).

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Rapid synthesis of ZnO dandelion-like nanostructures and their applications in humidity sensing and photocatalysis

Cited by 30 publications

References 26 publications

Rapid synthesis of ZnO nano-corncobs from Nital solution and its application in the photodegradation of methyl orange

Rapid synthesis of ZnO nano-corncobs from Nital solution and its application in the photodegradation of methyl orange

Aluminum- and Iron-Doped Zinc Oxide Nanorod Arrays for Humidity Sensor Applications

Effect of Microstructure of ZnO Nanorod Film on Humidity Sensing

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