Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Fe3O4" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-9 z 9
    Tytuł:
    Fabrication Fe/Fe3O4/Graphene Nanocomposite Electrode Material for Rechargeable Ni/Fe Batteries in Hybrid Electric Vehicles
    Autorzy:
    Kumar, H.
    Shukla, A. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/412042.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Graphene
    Nanocomposite
    rechargeable batteries
    Fe3O4
    Opis:
    Fe/Fe3O4/Graphene composite electrode material was synthesized by a thermal reduction method and then used as anode material along with Nickel cathode in rechargeable Ni/Fe alkaline batteries in hybrid electric vehicles. Reduced graphene /Fe/Fe3O4 composite electrode material was prepared using a facile three step synthesis involving synthesis of iron oxalate and subsequent reduction of exfoliated graphene oxide and iron oxalate by thermal decomposition method. The synthesis approach presents a promising route for a large-scale production of reduced graphene /Fe/Fe3O4 composite as electrode material for Ni/Fe rechargeable batteries. The particle size and structure of the samples were characterized by SEM and XRD.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 14; 15-25
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and antibacterial properties of Fe3O4-Ag nanostructures
    Autorzy:
    Pachla, A.
    Lendzion-Bieluń, Z.
    Moszyński, D.
    Markowska-Szczupak, A.
    Narkiewicz, U.
    Wróbel, R. J.
    Guskos, N.
    Żołnierkiewicz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/778603.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Fe3O4 nanoparticles
    superparamagnetic nanoparticles
    silver nanoparticles
    Opis:
    Superparamagnetic iron oxide nanoparticles were obtained in the polyethylene glycol environment. An effect of precipitation and drying temperatures on the size of the prepared nanoparticles was observed. Superparamagnetic iron oxide Fe3O4 , around of 15 nm, was obtained at a precipitation temperature of 80°C and a drying temperature of 60°C. The presence of functional groups characteristic for a polyethylene glycol surfactant on the surface of nanoparticles was confirmed by FTIR and XPS measurements. Silver nanoparticles were introduced by the impregnation. Fe3O4-Ag nanostructure with bactericidal properties against Escherichia coli species was produced. Interesting magnetic properties of these materials may be helpful to separate the bactericidal agent from the solution.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 4; 110-116
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Halloysite composites with Fe3O4 particles: the effect of impregnation on the removal of aqueous Cd(II) and Pb(II)
    Autorzy:
    Maziarz, Paulina
    Matusik, Jakub
    Powiązania:
    https://bibliotekanauki.pl/articles/127631.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    Fe3O4 particles
    halloysite
    adsorption
    Cd(II)
    Pb(II)
    Opis:
    In this study, halloysite-Fe3O4 composites were synthesized by a chemical-precipitation method to facilitate magnetic separation of the sorbents from aqueous solution. The research focused on the effect of Fe3O4 phase on the halloysite sorption properties. The X-ray diffraction (XRD) results confirmed successful deposition of Fe3O4 particles on a halloysite surface. They showed that the coating with Fe3O4 particles enhanced the halloysite adsorption affinity toward Cd(II) and Pb(II). The highest adsorption capacity was determined for the composites having 10% of the surface deposited with Fe3O4. In this case, the adsorption capacity for Cd(II) and Pb(II) was 33 and 112 mmol•kg-1, respectively. The point of zero charge (pHPZC) and desorption results indicated that the removal mechanism of metals is mainly related to chemisorption involving reaction with hydroxyls of either halloysite or Fe3O4 phase. The ion exchange is of limited importance due to the low cation exchange capacity (CEC) of halloysite - Fe3O4 composites.
    Źródło:
    Mineralogia; 2017, 48, 1/4; 107-126
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Magnetite Oxide Nanoparticles and Tungsten Oxide Nanoparticles on Phosphate Removal from Aqueous Solutions
    Autorzy:
    EL-Baz, Amro
    Mokhtar, Mona
    Abdo, Ahmed
    Powiązania:
    https://bibliotekanauki.pl/articles/24201790.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    phosphate removal
    nanoparticles
    Fe3O4 NPs
    WO3 NPs
    adsorption
    desorption
    Opis:
    Phosphate (P) removal from aqueous solutions were studied by a new mineral adsorbent, tungsten (VI) oxide (WO3) nanoparticles (NPs), which has not been the subject of much research in the field of removing P contaminants from agricultural wastewater. In this paper, P was removed from aqueous solutions by a new mineral adsorbent, WO3 NPs and it was compared with magnetite (iron IV) oxide (Fe3O4) nanoparticles (NPs) under the same ambient operating conditions i.e., The influence of the dosage of adsorbents, initial P concentration, contact time, pH and temperature. The values that achieved the best removal were recorded. It was concluded that the best limits for pH were at 2–3, contact time at 40 minutes, temperature at 45 °C and adsorbent dose at 1.0 g/L. Best results of the variables were applied on samples of real agricultural wastewater, which achieved removal ratio of 77.3% and 75.42% for Fe3O4 and WO3 NPs, respectively. SEM, EDX and FTIR images and analyses were conducted to describe the characteristics of nano-adsorbents used before and after P adsorption in aqueous solutions. The P adsorption kinetics for aqueous solutions were examined by fitting results of the experiment to both the first & second pseudo-kinetically models. The outcome indicated that kinematic data fit better with pseudo-second-order kinetic models. Moreover, the information captured from equilibrium adsorption was analyzed using isothermal methods (by Langmuir & Freundlich Forms). Their results showed that the Freundlich form is considered more suitable than Langmuir form in analyzing the biosorption of P ions. The thermodynamic demeanor of P adsorption by Fe3O4 and WO3 NPs was analyzed and evaluated, and the thermodynamic data analyses confirmed the process of P adsorption was spontaneous. The ΔG° value was negative, while ΔH° and ΔS° values found to be positive, which means that the adsorption of P was a spontaneous, random and endothermic operation. In general, Fe3O4 and WO3 nanoparticles had a high efficiency in removing phosphate from water. In addition, WO3 NPs has been identified as one of the most promising adsorbents due to its rapid and effective adsorption of pollutants.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 3; 287--303
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of Hexabenzylhexaazaisowurtzitane (HBIW) under Ultrasound Irradiation with Fe3O4@PCA Nanoparticles as an Efficient and Reusable Nanomagnetic Catalyst
    Autorzy:
    Malekzadeh, A. M.
    Shokrollahi, S.
    Ramazani, A.
    Rezaei, S. J. T.
    Asiabi, P. A.
    Joo, S. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/358107.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    hexabenzylhexaazaisowurtzitane (HBIW)
    nanomagnetic catalyst
    solid acid
    Fe3O4@PCA
    ultrasound irradiation
    Opis:
    Magnetic Fe3O4@polycitric acid (Fe3O4@PCA) nanoparticles were prepared by the reaction of Fe3O4 nanoparticles with an excess amount of citric acid at 100-160 °C. The magnetic Fe3O4@PCA nanoparticles were characterized by infrared spectroscopy (FTIR), scanning electron microscope (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA) and powder X-ray diffraction (XRD). Finally, the synthesized magnetic Fe3O4@PCA nanoparticles were used as a heterogeneous solid acid catalyst for the synthesis of HBIW from benzylamine and glyoxal in acetonitrile-water solvent under ultrasonic irradiation conditions. The catalyst could be reused up to 6 times without significant loss of activity.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 2; 336-350
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cytotoxicity and genotoxicity of GO-Fe3O4 hybrid in cultured mammalian cells
    Autorzy:
    Jedrzejczak-Silicka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/779480.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    GO-Fe3O4 hybrid
    relative viability
    DNA fragmentation
    micronucleus assay
    genotoxicity
    Opis:
    The study was aimed at investigating the effect of the Fe3O4  hybrid deposited on graphene oxide (GO- Fe3O4) on the relative viability and DNA integrity. The properties of the GO-Fe3O4  hybrid were analyzed using a transmission electron microscopy (TEM), X-ray diffraction technique (XRD) and thermal gravimetric method (TGA), while the efficiency of graphene oxide covalent functionalization with iron oxide nanospheres was determined by Fourier transform infrared spectroscopy (FT-IR). L929 and MCF-7 cell lines were selected to analyze the biocompatibility of GO-Fe3O4  nanoparticles. The hybrid was tested using WST-1 and LDH leakage assays. DNA integrity was analyzed by agarose gel electrophoresis and micronucleus assay was performed to examine chromosomal damage in the exposed cell lines. The tested GO-Fe3O4  hybrid did not significantly reduce cell metabolism of L929 cells. GO-Fe3O4 hybrid particles only slightly affected the integrity of cell membranes. DNA integrity and micronucleus assays did not indicate genotoxicity of the hybrid.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 1; 27-33
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Covalent immobilization of laccase on Fe3O4-graphene oxide nanocomposite for biodegradation of phenolic compounds
    Autorzy:
    Rouhani, Shamila
    Azizi, Shohreh
    Maaza, Malik
    Mamba, Bhekie
    Msagati, Titus A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2032944.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    phenol
    adsorption
    biodegradation
    Fe3O4
    Trametes versicolor
    laccase
    fenol
    adsorbcja
    biodegradacja
    lakaza
    Opis:
    Laccase from Trametes Versicolor (E.C. 1.10.3.2) was immobilized on the Fe3O4–graphene hybrid nanocomposite through the covalent attachment method (Lac/Fe3O4/GO). The effect of immobilization conditions on the activity and recovered activities such as contact time, the concentration of glutaraldehyde and enzyme was evaluated. The recovered activity of the immobilized laccase on the Fe3O4–graphene oxide nanocomposite was ca. 86%. Immobilized laccase unlike free laccase retained the activity and exhibited higher resistance to temperature and pH changes and also improved storage and thermal stability. Approximately 70% of relative activity for immobilized laccase was remained after being incubated for 2 h at 55 °C, but free laccase only remained 48%. Immobilized laccase retained 88% of initial activity after storage for 20 days, however, the free laccase only 32%. Finally, Lac/Fe3O4/GO capability was evaluated by the oxidation of phenol, p-chlorophenol, and 2,4-dichlorophenol. Lac/Fe3O4/GO was characterized by SEM, EDX, FT-IR, and AGFM.
    Źródło:
    Environment Protection Engineering; 2021, 47, 1; 85-99
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of Calcium Oxide from Green Mussel Shell with Iron Oxide as a Potential Adsorbent for the Removal of Iron and Manganese Ions from Acid Mine Drainage
    Autorzy:
    Purwaningrum, Widia
    Hasanudin, Hasanudin
    Rachmat, Addy
    Riyanti, Fahma
    Hariani, Poedji Loekitowati
    Powiązania:
    https://bibliotekanauki.pl/articles/2202252.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    CaO/Fe3O4
    green mussel shell
    adsorption
    iron
    manganese
    acid mine drainage
    Opis:
    Acid mine drainage (AMD) has the characteristics of high heavy metal ion content and low pH. This study aimed to synthesize the CaO/Fe3O4 composite for the adsorption of iron and manganese ions from acid mine drainage. CaO was synthesized from the shells of green mussels (Perna viridis). The CaO/ Fe3O4 composites were characterized using XRD, BET surface area, SEM-EDS, and VSM. The functional groups of the composite before and after adsorption were analyzed using FTIR. The adsorption of Fe(II), Fe(III), and Mn(II) ions was carried out with the batch method to determine the effect of pH, contact time, and initial concentration of metal ions. The CaO/ Fe3O4 composite has magnetic properties, as indicated by the saturation magnetization value of 65.49 emu/g. The Langmuir and Freundlich isotherm models were used to describe the adsorption isotherm of the composite for Fe(II), Fe(III), and Mn(II) ions. Investigations were also conducted on adsorption kinetics, including pseudo-first-order and pseudo-second-order, as well as adsorption thermodynamics comprising free energy, enthalpy, and entropy. Pseudo-first-order and Langmuir isotherms are suitable to describe the adsorption of Fe(II), Fe(III), and Mn(II) ions with adsorption capacities of Fe(III) > Fe(II) > Mn(II). Moreover, the adsorption of all ions using the composite occurred spontaneously. The removal effectiveness for Fe and Mn ions from AMD using CaO/ Fe3O4 composite, reached 90.41 and 97.59%, respectively, in volume 100 mL AMD, composite mass 0.4 g, and a contact time of 60 minutes.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 11; 188--201
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design Of A Bi-Functional α-Fe2O3/Zn2SiO4:Mn2+ By Layer-By-Layer Assembly Method
    Projektowanie dwufunkcyjnych proszków α-Fe2O3/Zn2SiO4:Mn2+ metodą warstwa po warstwie
    Autorzy:
    Yu, R.
    Yun, J.
    Pee, J-H.
    Kim, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/352623.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    red pigment
    α-Fe2O3
    Zn2SiO4:Mn2+ layer
    phosphor
    bi-functional
    czerwony pigment
    Zn2SiO4: Mn2+
    fosfor
    proszki dwufunkcyjne
    Opis:
    This work describes the design of bi-functional α-Fe2O3/Zn2SiO4:Mn2+ using a two-step coating process. We propose a combination of pigments (α-Fe2O3) and phosphor (Zn2SiO4:Mn2+ ) glaze which is assembled using a layer-by-layer method. A silica-coated α-Fe2O3 pigment was obtained by a sol-gel method and a Zn2+ precursor was then added to the silica-coated α-Fe2O3 to create a ZnO layer. Finally, the Zn2SiO4:Mn2+ layer was prepared with the addition of Mn2+ ions to serve as a phosphor precursor in the multi-coated α-Fe2O3, followed by annealing at a temperature above 1000°C. Details of the phase structure, color and optical properties of the multi-functional α-Fe2O3/Zn2SiO4:Mn2+ were characterized by transmission electron microscopy and X-ray diffraction analyses.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1165-1167
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies