Optical and photocatalytic properties of La-doped ZnO nanoparticles prepared via precipitation and mechanical milling method

Suwanboon, Sumetha; Amornpitoksuk, Pongsaton; Sukolrat, Apinya; Muensit, Nantakan

doi:10.1016/j.ceramint.2012.09.050

Cited by 135 publications

(57 citation statements)

References 40 publications

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“…The incorporation of Ga dopants promoted the formation of vertically arrayed nanorods by inducing island growth in the initial stage. As we know, the optical band gap value depended upon many key parameters such as particle size, particle shape and defect concentration [32,33]. From the results obtained and using the AFM images analysis, it is reasonable to conclude that these parameters can be influence a value of the optical band gap.…”

Section: Optical Constant Characterizationmentioning

confidence: 86%

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Optical and photoluminescence properties of Ga doped ZnO nanostructures by sol-gel method

et al. 2012

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Zinc oxide (ZnO) nanocrystallites with different Ga-doping levels were successfully prepared by spin coating sol-gel technique. The morphological properties of Ga doped ZnO films were studied by atomic force microscopy (AFM). Alignment of ZnO nanorods with respect to the substrate depends on the amount of Ga dopant content. The dopant content varies from 1 % to 4 %, based on Ga-doping levels. The optical properties of the ZnO nanocrystallites following Ga-doping were also investigated by UV-Visible absorption and Photoluminescence spectra. Our results indicate that Gadoping can change the energy-band structure and effectively adjust the intensity of the luminescence properties of ZnO nanocrystallites. Transmittance spectra of the films indicate that the films have high transparency. The refractive index dispersion was analyzed by single oscillator model developed by Wemple and DiDomenico. The oscillator energy, dispersion energy, high frequency dielectric constant values for the films were determined were calculated and it is found that the optical parameters are changed with Ga-doping content.

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Section: Optical Constant Characterizationmentioning

confidence: 86%

“…But the obtained optical band gap was found to be larger than that obtained for nanocrystalline undoped and La-doped ZnO by Suwanboon and Amornpitoksuk [40]. The E g value of ZnO altered depending on many parameters, for example, imperfection in ZnO crystal [33], particle shape [33] and particle size [41].…”

Section: Wavelength (Nm)mentioning

confidence: 97%

Optical and photoluminescence properties of Ga doped ZnO nanostructures by sol-gel method

et al. 2012

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“…Where k is equal to 0.89; λ is X-ray wavelength (1.54 A), β is peak width at half maximum height in radian and θ is bragg diffraction angle of the maximum peak (Zhu et al, 2005;Suwanboon et al, 2013). In FTIR spectrum of ZnO nanoparticles sample, two strong absorptions are seen at 503 cm -1 and 432 cm -1 in which 432 cm -1 peak represents tensile bond of ZnO and 503 cm -1 peak represents oxygen vacancies in ZnO (Figure 4).…”

Section: Zno Nanoparticlesmentioning

confidence: 99%

Insecticidal effects of zinc oxide nanoparticles and Beauveria bassiana TS11 on Trialeurodes vaporariorum (Westwood, 1856) (Hemiptera: Aleyrodidae)

Khooshe-Bast

Sahebzadeh

Ghaffari‐Moghaddam³

et al. 2016

AAS

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Greenhouse whitefly, Trialeurodes vaporariorum is a major pest of horticultural and ornamental plants and is usually controlled with insecticides or biological control agents. In the current study, we examined the effects of synthesized zinc oxide nanoparticles (ZnO NPs) and Beauveria bassiana TS11 on T. vaporariorum adults. ZnO NPs were synthesized by precipitation method. Field emission scanning electron microscope images indicated that ZnO NPs were noncompacted uniformly. X-ray diffraction results confirmed the hexagonal wurtzite structure of ZnO NPs. Fourier transform infrared analysis showed an intense absorption peak at a range of 434-555 cm -1 related to Zn-O bond. In bioassays, adults were exposed to different concentrations of ZnO NPs (3, 5, 10, 15, 20 , 10 7 , 10 8 spor ml -1 ). Vrednosti LC 50 so bile za nano delce ZnO 7.35 mg l -1 in 3.28×10 5 ml -1 za trose glive. Smrtnost, ki je bila dosežena pri največjih koncentracijah nano delcev ZnO in trosov glive je znašala 91.6 % in 88.8 %. Ti izsledki kažejo pozitivni učinek obeh pripravkov na smrtnost odraslih osebkov rastlinjakovega ščitkarja. Glede na to, da je bila raziskava opravljena v laboratoriju je potrebno v bodoče opraviti še več raziskav v realnih razmerah.

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“…Suwanboon at al. [32] reported that the E g value of La doped ZnO altered depending on many parameters, for example, imperfection in ZnO crystal, particle shape and particle size.…”

Section: Band Gap Energy Calculationmentioning

confidence: 99%

Some physical investigations on hexagonal-shaped nanorods of lanthanum-doped ZnO

Mrabet

Kamoun

Boukhachem

et al. 2015

Journal of Alloys and Compounds

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Optical and photocatalytic properties of La-doped ZnO nanoparticles prepared via precipitation and mechanical milling method

Cited by 135 publications

References 40 publications

Optical and photoluminescence properties of Ga doped ZnO nanostructures by sol-gel method

Optical and photoluminescence properties of Ga doped ZnO nanostructures by sol-gel method

Insecticidal effects of zinc oxide nanoparticles and Beauveria bassiana TS11 on Trialeurodes vaporariorum (Westwood, 1856) (Hemiptera: Aleyrodidae)

Some physical investigations on hexagonal-shaped nanorods of lanthanum-doped ZnO

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