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Formation of iron sulfide photocatalytic colloidal dispersion via pulsed laser ablation in liquids.

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    0547308 - ÚCHP 2022 RIV GB eng C - Conference Paper (international conference)
    Vála, L. - Vavruňková, V. - Jandová, Věra - Pola, M. - Křenek, T.
    Formation of iron sulfide photocatalytic colloidal dispersion via pulsed laser ablation in liquids.
    IOP Conference Series: Materials Science and Engineering, Volume 613, Issue 1. Bristol: IOP PUBLISHING LTD, 2019, č. článku 012034. ISSN 1757-8981. E-ISSN 1757-899X.
    [Conference on Competitive Materials and Technology Processes /5./. Miskolc-Lillafured (HU), 08.10.2018-12.10.2018]
    Institutional support: RVO:67985858
    Keywords : catalyst * zeta-potencial * nanoparticles
    OECD category: Physical chemistry
    https://iopscience.iop.org/article/10.1088/1757-899X/613/1/012034/pdf

    Pulsed laser irradiation of iron sulfide in water and ethanol allows laser ablation and generation of FeS nano/micro particles. Measurement of the size distribution reveals 100, 1000 and 5000 nm sized particles in water and 180 nm sized particles in ethanol. The values of zeta potential: 13.2 mV for colloid in water confirm incipient stability and tendency for coagulation whereas the value: -40.6 mV shows good stability of ablatively achieved nanoparticles in ethanol. SEM analyses of particles obtained by evaporation of solvents on Ta substrate revealed shapeless, roundshape and sheet-like morphology of agglomerates whose size span from units up to tens of μm. Also spherical particles sized around tens of nm were detected. EDX shows Fe/S ratio ∼3.25 and ∼ 1.2 for particles ablated in water and ethanol respectively. Raman spectroscopy indicates the formation of mackinawite (Fe1+xS) and pyrrhotite (Fe1-xS) phase. The photocatalytic effect of prepared water colloid was tested in methylene blue (MB) degradation under the daylight.
    Permanent Link: http://hdl.handle.net/11104/0323571

     
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