Topographic, optical and chemical properties of zinc particle coatings deposited by means of atmospheric pressure plasma

Wallenhorst, Lena; Loewenthal, Leander; Avramidis, Georg; Gerhard, Christoph; Militz, Holger; Ohms, G.; Viöl, Wolfgang

doi:10.1016/j.apsusc.2017.03.021

Cited by 9 publications

(7 citation statements)

References 37 publications

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“…The proximity of substrate to the edge of the hot plasma plume in the configuration shown in Figure 5 b was also demonstrated by Wallenhorst et al [ 48 ]. In fact, they developed a technique for deposition of nanostructured films on different substrates in the continuous mode.…”

Section: Plasma Methods For Synthesizing Zno Nanoparticlessupporting

confidence: 77%

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

et al. 2021

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An overview of recent work on the low-temperature plasma-assisted synthesis of zinc oxide (ZnO) nanoparticles is presented and interpreted in terms of gas-phase and surface reactions with illustrated examples. The thermodynamical nonequilibrium conditions allow the formation of chemically reactive species with a potential energy of several eV, which readily interact with the Zn precursors and initiate reactions leading to the formation of nanoparticles or nanowires. The high-quality nanowires were synthesized from Zn powders only upon interaction with moderately ionized plasma in a narrow range of plasma parameters. This technique is promising for the synthesis of large quantities of nanowires with aspect ratios well above 10, but the exact range of parameters remains to be determined. Apart from the ex situ techniques, the ZnO nanoparticles can be synthesized by depositing a film of precursors (often Zn salts or Zn-containing organometallic compounds) and exposing them to oxygen plasma. This technique is useful for the synthesis of well-adherent ZnO nanoparticles on heat-sensitive objects but requires further scientific validation as it often leads to the formation of a semicontinuous ZnO film rather than nanoparticles. Both low-pressure and atmospheric plasmas are useful in converting the precursor film into ZnO nanoparticles despite completely different mechanisms.

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Section: Plasma Methods For Synthesizing Zno Nanoparticlessupporting

confidence: 77%

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

et al. 2021

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“…This technique is mainly applied for the qualitative analysis of chemical elements, surface element qualitative or semi-quantitative analysis, and chemical valence analysis. XPS is also widely used to study the surface soil layer or super-thin chips such as coatings [32] and nanomaterials [33]; it is applied in the oil chemical field and other industries [34,35].…”

Section: Xps Resultsmentioning

confidence: 99%

Flotation Separation of Scheelite from Fluorite Using Sodium Polyacrylate as Inhibitor

Zhang

Chen

et al. 2017

Minerals

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Abstract:The depressing properties of sodium polyacrylate (PA-Na) for scheelite and fluorite were studied by micro-flotation tests, infrared spectroscopy (IR), zeta potentials, X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT). The flotation results reveal that the selective depression effect of PA-Na is better than that of sodium silicate, and PA-Na can depress fluorite more effectively than scheelite. The flotation recovery of scheelite and fluorite keeps at about 75% and 10%, respectively, at the pulp pH 9.3~9.6 and PA-Na concentration from 30 to 50 mg/L. IR spectra results suggest that PA-Na has a chemical effect on the surface of scheelite and fluorite. The zeta potential of fluorite becomes more negative than that of scheelite after PA-Na addition. XPS analysis deduces the occurrence of chemisorption between PA-Na and mineral surfaces, and the chemisorption of PA-Na on fluorite is stronger than on scheelite. DFT demonstrates that the absolute value of the adsorption energy in the presence of PA-Na is larger on the fluorite {111} surface than on the scheelite {111} surface. Thus, fluorite is more readily depressed than scheelite, which remarkably matches the micro-flotation test results.

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“…The APPJ was composed of a high-voltage power supply, a brush disperser (RBG 2000, Palas GmbH, Karlsruhe, Germany), and a self-developed spray nozzle as an electrode. A cross-section of the electrode assembly group is shown in previous research [47].…”

Section: Photocatalytic Performance Testmentioning

confidence: 99%

Bismuth Oxide Faceted Structures as a Photocatalyst Produced Using an Atmospheric Pressure Plasma Jet

Kohler¹,

Siebert²,

Kochanneck³

et al. 2019

Catalysts

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The photocatalyst bismuth oxide, which is active under visual light, was deposited using an atmospheric pressure plasma jet (APPJ). Sixteen different samples were generated under different parameters of the APPJ to investigate their catalytic activity. The prepared samples were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), laser scanning microscopy (LSM), and UV–vis diffuse reflectance absorption spectroscopy. The measured data, such as average sample thickness, coverage ratio, phase fraction, chemical composition, band gap, and photocatalytic performance were used for comparing the samples. The XRD analysis showed that the deposition process produced a mixed phase of monocline Bi2O3 and tetragonal Bi2O2.33. Using the Rietveld refinement method, phase fractions could be determined and compared with the XPS data. The non-stoichiometric phases were influenced by the introduction of nitrogen to the surface as a result of the deposition process. The band gap calculated from the diffuse absorption spectroscopy shows that Bi2O2.33 with 2.78 eV had a higher band gap compared to the phases with a high proportion of Bi2O3 (2.64 eV). Furthermore, it was shown that the band gap was dependent on the thickness of the sample and oxygen vacancies or loss of oxygen in the surface. All coatings had degraded methyl orange (MO) under irradiation by xenon lamps.

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Topographic, optical and chemical properties of zinc particle coatings deposited by means of atmospheric pressure plasma

Cited by 9 publications

References 37 publications

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

Recent Advances in the Plasma-Assisted Synthesis of Zinc Oxide Nanoparticles

Flotation Separation of Scheelite from Fluorite Using Sodium Polyacrylate as Inhibitor

Bismuth Oxide Faceted Structures as a Photocatalyst Produced Using an Atmospheric Pressure Plasma Jet

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