Nanostructured Polyphase Catalysts Based on the Solid Component of Welding Aerosol for Ozone Decomposition View Full Text


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Article Info

DATE

2015-12-09

AUTHORS

Tatyana Rakitskaya, Alla Truba, Alim Ennan, Vitaliya Volkova

ABSTRACT

Samples of the solid component of welding aerosols (SCWAs) were obtained as a result of steel welding by ANO-4, TsL‑11, and UONI13/55 electrodes of Ukrainian manufacture. The phase compositions of the samples, both freshly prepared (FP) and modified (M) by water treatment at 60 °C, were studied by X-ray phase analysis and IR spectroscopy. All samples contain magnetite demonstrating its reflex at 2θ ~ 35° characteristic of cubic spinel as well as manganochromite and iron oxides. FP SCWA-TsL and FP SCWA-UONI contain such phases as СaF2, water-soluble fluorides, chromates, and carbonates of alkali metals. After modification of the SCWA samples, water-soluble phases in their composition are undetectable. The size of magnetite nanoparticles varies from 15 to 68 nm depending on the chemical composition of electrodes under study. IR spectral investigations confirm the polyphase composition of the SCWAs. As to IR spectra, the biggest differences are apparent in the regions of deformation vibrations of M–O–H bonds and stretching vibrations of M–O bonds (M–Fe, Cr). The catalytic activity of the SCWAs in the reaction of ozone decomposition decreases in the order SCWA-ANO > SCWA-UONI > SCWA-TsL corresponding to the decrease in the content of catalytically active phases in their compositions. More... »

PAGES

473

References to SciGraph publications

  • 2013-02-01. Antiozonant activity of the silica modified with 3d metal complexes in RUSSIAN JOURNAL OF GENERAL CHEMISTRY
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1186/s11671-015-1186-7

    DOI

    http://dx.doi.org/10.1186/s11671-015-1186-7

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1004859848

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/26646686


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