Chemical Binding of Carbon Dioxide on Zinc Oxide Powders Prepared by Mechanical Milling

Пронин, И. А.; Yakushova, N. D.; Averin, I. A.; Карманов, А. А.; Komolov, A. S.; Sychev, M. M.; Мошников, В. А.; Теруков, Е. И.

doi:10.1134/s0020168521110108

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…It is well known from literature, that oxide semiconductors contain on their surface a number of adsorption centers with different acidity [41][42][43]. Therefore, we assume, that due to adsorption centers with different energy parameters on the surface of the polycrystalline ZnO layer the growth of Al 2 O 3 at a small number of cycles is not ideally conformal.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Interface doping of zinc oxide nanorods

D.S.

Bobkov

et al. 2022

Physics of the Solid State

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The effect of an increase in the electrical conductivity of a system of zinc oxide nanorods by a factor of 105 during atomic layer deposition of a thin dielectric layer of aluminum oxide was found. It is shown that a change in the electrical conductivity of zinc oxide during atomic layer deposition of aluminum oxide on the surface is also observed for thin polycrystalline layers of zinc oxide. A study of polycrystalline layers of zinc oxide coated with aluminum oxide using ultraviolet and X-ray photoelectron spectroscopy is presented. Based on the results of photoelectron spectroscopy, two main factors for changing the electrical conductivity are proposed, which consist in the formation of a two-dimensional electron gas at the ZnO|Al2O3 interface and doping of the near-surface region of zinc oxide with aluminum atoms. Keywords: nanorods, zinc oxide, aluminum oxide, atomic layer deposition, transparent electrodes, X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Interface doping of zinc oxide nanorods

D.S.

Bobkov

et al. 2022

Physics of the Solid State

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“…Meanwhile, the morphology of sensitive layers can be very diverse. The sensitive layers can consist of nanoparticles [17][18][19], nanorods [20,21], nanofibers [22], nanotubes [23], nanoplates [24], various hierarchical structures [25]. As a separate matter, it should be noted the intensive and promising research aimed at using 2Dmaterials as adsorption gas sensors [26].…”

Section: Introductionmentioning

confidence: 99%

Gas sensitivity of nanostructured coatings based on zinc oxide nanorods under combined activation

et al. 2022

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This paper presents a study of the gas sensitivity of a nanostructured zinc oxide coating to isopropyl alcohol vapor during heating, ultraviolet irradiation, as well as simultaneous heating and irradiation. Simultaneous heating to 150oC and ultraviolet irradiation ensures an increase in the sensor layer response. A 10-fold decrease in the power consumption of an ultraviolet light-emitting diode results in a 1.2-fold decrease in the response of the sensor coating. Reducing the operating temperature of a gas sensor with low power consumption and achieving the required sensitivity can provide adsorption sensors integration into portable devices for monitoring ambient air quality. Keywords: zinc oxide, nanorods, gas sensor, UV irradiation, combined activation.

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“…As stated in [ 9 ], having undergone e-beam irradiation, europium-doped thin ZnO films show potential for applications as a source of red light. The possibility of adaptable modification of magneto-transport characteristics of cobalt-doped ZnO powders due to e-beam irradiation has been reported [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Control over the Surface Properties of Zinc Oxide Powders via Combining Mechanical, Electron Beam, and Thermal Processing

et al. 2022

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The surface properties of zinc oxide powders prepared using mechanical activation, electron beam irradiation, and vacuum annealing, as well using combinations of these types of treatments, were studied using X-ray photoelectron spectroscopy. The structure of the obtained materials was studied by an X-ray diffraction technique and by scanning electron microscopy. We found that over five hours of grinding in an attritor, the size of nanocrystals decreases from 37 to 21 nm, and microdeformations increase from 0.3% to 0.6%. It was also found that a five-hour grinding treatment promoted formation of vacancies in the zinc sublattice at the surface and diffusion of Zn2+ cations into the bulk of the material. Irradiation of commercial zinc oxide powders with an electron beam with an energy of 0.9 MeV and a dose of 1 MGy induced breaking of Zn–O bonds, diffusion of interstitial zinc ions into the bulk, and oxygen atom escape from regular positions into the gas phase. A combined treatment of five hours of grinding and electron beam irradiation promoted accumulation of interstitial zinc ions at the surface of the material. Annealing of both initial and mechanically activated ZnO powders at temperatures up to 400 °C did not lead to a significant change in the properties of the samples. Upon exceeding the 400 °C annealing temperature the X-ray photoelectron spectra show almost identical atomic composition of the two types of materials, which is related to diffusion of interstitial zinc ions from the bulk of the material to the surface.

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Chemical Binding of Carbon Dioxide on Zinc Oxide Powders Prepared by Mechanical Milling

Cited by 10 publications

References 20 publications

Interface doping of zinc oxide nanorods

Interface doping of zinc oxide nanorods

Gas sensitivity of nanostructured coatings based on zinc oxide nanorods under combined activation

Control over the Surface Properties of Zinc Oxide Powders via Combining Mechanical, Electron Beam, and Thermal Processing

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