Low temperature synthesis and NOx sensing properties of nanostructured Al-doped ZnO

Navale, S.C.; Ravi, V.; Mulla, I.S.; Gosavi, Suresh; Kulkarni, Sulabha K.

doi:10.1016/j.snb.2007.03.019

Cited by 115 publications

(72 citation statements)

References 24 publications

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“…[9][10][11] By contrast, investigations on using zigzag nitrogen oxide NWs for NO gas sensing are few. [26][27][28] Moreover, to the best of our knowledge, the evolution of zigzag GaN/Ga 2 O 3 heterogeneous NWs from changes caused by the on/off frequency process has not been reported thus far. In addition, sensors for detecting nitric oxide (NO) have received progressive attention because of the environment-and health-related effects of NO.…”

Section: Introductionmentioning

confidence: 98%

Zigzag GaN/Ga2O3 heterogeneous nanowires: Synthesis, optical and gas sensing properties

Chang

Yeh

et al. 2011

AIP Advances

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Zigzag GaN/Ga2O3 heterogeneous nanowires (NWs) were fabricated, and the optical properties and NO gas sensing ability of the NWs were investigated. We find that NWs are most effective at 850 °C at a switching process once every 10 min (on/off = 10 min per each) with a mixture flow of NH3 and Ar. The red shift of the optical bandgap (0.66 eV) is observed from the UV-vis spectrum as the GaN phase forms. The gas sensing characteristics of the developed sensor are significantly replaced to those of other types of NO sensors reported in literature

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Section: Introductionmentioning

confidence: 98%

Zigzag GaN/Ga2O3 heterogeneous nanowires: Synthesis, optical and gas sensing properties

Chang

Yeh

et al. 2011

AIP Advances

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“…There are many reports on NO 2 gas sensors such as, SnO 2 13 , NiO 14 , ZnO [15][16][17] based sensors. Among all the existing metal oxide gas sensors, ZnO based sensors are attracting wide attention when it is doped with Al due to the high sensitivity towards NO 2 and selectivity among other gases 9,15,18,23 . Also there are many fabrication techniques have been introduced in literature to synthesize Al doped ZnO sensors 15,16,19,20,2123,24 .…”

Section: Introductionmentioning

confidence: 99%

Effect of RF power on the structural, optical and gas sensing properties of RF-sputtered Al doped ZnO thin films

Srinatha

Kamble³

et al. 2016

RSC Adv.

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The effect of Radio Frequency (RF) power on the properties of magnetron sputtered Al doped ZnO thin films and the related sensor properties are investigated. A series of 2 wt% Al doped ZnO; Zn0.98Al0.02O (AZO) thin films prepared with magnetron sputtering at different RF powers, are examined. The structural results reveal a good adhesive nature of thin films with quartz substrates as well as increasing thickness of the films with raising RF power. Besides, the increasing RF power is found to improve the crystallinity and grains growth as confirmed by X-ray diffraction. On the other hand, the optical transmittance is significantly influenced by the RF power, where the transparency values achieved are higher than 82% for all the AZO thin films and the estimated optical band gap energy is found to decrease with RF power due to an increase in the crystallite size as well as the film thickness. In addition, the defect induced luminescence at low temperature (77 K) and room temperature (300 K) was studied through photoluminescence spectroscopy, it is found that the defect density of electronic states of Al 3+ ion found to increase with increase of RF power due to the increase in the thickness of the film and the crystallite size. The gas sensing behavior of AZO films was studied for NO2 at 350 °C. The AZO film shows good response towards NO2 gas and also a good relationship between the response and the NO2 concentration, which is modeled using an empirical formula. The sensing mechanism of NO2 is discussed.

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“…Gas sensor performances are greatly influenced by the shape and size of the sensing nanomaterials. When the adding micrometer-scale and nanometer-scale building blocks in the 3D architectures help to induce and introduced a variety of novel properties including the structure features, specific surface area is higher and porosity and it will improve the accessibility of test gasses [8]. Recently, Zhang et al [9] and Lao et al [10] were improved the sensing properties of C2H2 through the synthesis of ZnO nanostructures at high temperature and it shows surface area is increased, mass transport is easier and stability is higher than other nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Development of ZnO/Ag Nanocomposite Film for Gas Sensing Application

Davis¹,

Singh²

2017

Asian J. Chem.

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The sol-gel technique was used to prepare zinc oxide nanoparticles doped with silver ions. The sample phase and microstructure were characterized by different techniques such as X-ray diffraction, field emission scanning electron microscopy, also absorption and metal composition were finding by UV-visible spectra, EDAX, respectively. In this paper, we tried with ZnO/Ag nanocomposite with pH 9 and varying the composition of silver ions. X-ray diffraction study showed that increasing in intensity of silver with the silver concentration, which indicates the formation of ZnO/Ag composite. The prepared sample maintains the good morphology and microstructure of pure ZnO. Sensing results showing that ZnO/Ag nanocomposite shows better sensing properties. 5 wt % AgNO3 and 0.5 g of ZnO with adding 1 mol NaBH4 in 5 mL of ZnO/Ag composite (pH 9) were giving better sensing output. The fabricated device showed that high sensor response of 72 % at 1000 ppm and the low detection limit is 5 ppm.

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Low temperature synthesis and NOx sensing properties of nanostructured Al-doped ZnO

Cited by 115 publications

References 24 publications

Zigzag GaN/Ga2O3 heterogeneous nanowires: Synthesis, optical and gas sensing properties

Zigzag GaN/Ga2O3 heterogeneous nanowires: Synthesis, optical and gas sensing properties

Effect of RF power on the structural, optical and gas sensing properties of RF-sputtered Al doped ZnO thin films

Development of ZnO/Ag Nanocomposite Film for Gas Sensing Application

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