Browsing by Author "HADJEL Mohammed"

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    Synthesis of diatomite Silica Doped Iron Nanoparticle Innovative Material Composite and their Enhanced Photocatalytic Activity Driven by UV Light
    (University of Eloued, 2019-02-24) REZIG Walid; HADJEL Mohammed
    Diatomite silica doped iron nanoparticle thermally calcination at 600 °C “ DMF3X6 ” composite as catalyst for heterogeneous photocatalysis of vat green 03 indanthren and characterized in this study.The Diatomite silica doped iron nanoparticle thermally calcination at 600 °C called “ DMF3X6 ” was made through surface modification treatment including NaOH deposition on raw diatomite with thermally calcination .In NaOH treatment, surface of Diatomite silica doped iron nanoparticle thermally calcination at 600 °C “ DMF3X6 ” was partially dissolved in NaOH with thermally calcination at 600 °C by means of x-ray fluorescence ( XRF ), x-ray diffraction ( XRD ), attenuated reflection-Fourier transform infrared ( ATR-FTIR ), scanning electron microscopy ( SEM ), energy dispersive x-ray ( EDX ) ,thermogravimetric analysis ( TGA ) , differential scanning calorimetry (DSC ) and UV–visible diffuse reflectance spectroscopy ( DRS ) .The surface area of Diatomite silica doped iron nanoparticle thermally calcination at 600 °C “ DMF3X6 ” is 218.2 m2/g .The bad gap of DMF3X6 was Eg = 1.15 eV by UV-visible DRS technique .The surface modification also increased the point of zero charge (pHPZC ) values to 6 for Diatomite silica doped iron nanoparticle thermally calcination at 600 °C “ DMF3X6 ” .The vat green 03 indanthren textile dye degradation has pH dependency, the better result is at pH =10 with colour remove about 92 %.The photodecolourisation rate follows pseudo-first order kinetic with to respect to the dye concentration.
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    Synthesis of Iron Oxyhydroxide Modified Diatomite Innovative Material Composite and their Enhanced Photocatalytic Activity Driven by UV Light
    (University Of Eloued جامعة الوادي, 2019-02-24) REZIG Walid; HADJEL Mohammed
    Ferrihydrite silicide is widely used to realize contact terminals of integrated circuits and is usually formed by ex-situ heating treatments in-situ reactions during sputter deposition of a ferrihydrite with SiO2 of diatomite have been investigated in this work, by means of x-ray diffraction , x-ray fluorescence , infrared spectroscopy, , scanning electron microscopy. Diatomite which will be modified by iron “ the deposit of ferrihydrite on raw diatomite by FeCl2, and NaOH. Comparison of XRD results proves that raw diatomite has an irregular structure but it becomes more regular at ferrihydrite modified to obtain ferric oxides differents phases from cristallinities are: ferrihydrite , maghemite, magnetite, akaganeite,hematite, goethite, and schwertmannite. Kinetics photodegradation ( photocatalytic degradation) depend a pH solution Vat Green 03 textile dye. It is more important with low pH (pH= 4).Ferrihydrite modified diatomite ( DMF1) offer a great potentials for dyes eliminations and their wastewaters.