Modification and Characterization of Fe3O4 Nanoparticles for Use in Adsorption of Alkaloids

Abstract

Magnetite (Fe3O4) is a ferromagnetic iron oxide of both Fe(II) and Fe(III), prepared by FeCl2 and FeCl3. XRD was used for the confirmation of Fe3O4. Via the modification of Tetraethyl orthosilicate (TEOS), (3-Aminopropyl)trimethoxysilane (APTMS), and Alginate (AA), Fe3O4@SiO2, Fe3O4@SiO2-NH2, and Fe3O4@SiO2-NH2-AA nanoparticles could be obtained, and IR and SEM were used for the characterizations. Alkaloid adsorption experiments exhibited that, as for Palmatine and Berberine, the most adsorption could be obtained at pH 8 when the adsorption time was 6 min. The adsorption percentage of Palmatine was 22.2%, and the adsorption percentage of Berberine was 23.6% at pH 8. Considering the effect of adsorption time on liquid phase system, the adsorption conditions of 8 min has been chosen when pH 7 was used. The adsorption percentage of Palmatine was 8.67%, and the adsorption percentage of Berberine was 7.25%. Considering the above conditions, pH 8 and the adsorption time of 8min could be chosen for further uses.

Synthesis and Characterization of Magnetite-Alginate Nanoparticles for Enhancement of Nickel and Cobalt Ion Adsorption from Wastewater

“…Characterization of M-AlgNPs. Figure 1 shows the FTIR spectra of M-AlgNPs, which exhibit three peaks at 635, 589, and 441 cm -1 caused by the vibration of FeO bond in both octahedral and tetrahedral sites of the inverse spinel cubic of Fe 3 O 4 , respectively [14,15]. The peaks at 1623 and 1352 cm -1 were attributed to the stretching of the C=O group in the alginate.…”

Electrochemical Monitoring of Methotrexate Anticancer Drug in Human Blood Serum by Using in situ Solvothermal Synthesized Fe3O4/ITO Electrode

“…Finally, 10 mL NH 4 OH was added dropwise to the solution mixture under vigorous stirring for further 60 minutes. The black precipitate was formed and separated by centrifuge then washed by DIW and ethanol and dried in an oven at 200 °C for 4 hrs .…”

Characterization of Fe3O4/rGO Composites from Natural Sources: Application for Dyes Color Degradation in Aqueous Solution

“…For Fe3O4/rGO (1:2) sample, the reduction is 36.73%, and for Fe3O4/rGO (1:3) it falls by 64.22% (more than half the saturation of magnetization of Fe3O4 NPs). These superparamagnetic properties, which play a role in the application of natural dye absorption, absorption of heavy metals and other applications [25,28,33,52] will be presented in the following section.…”

“…For its good electrochemical performance, it is useful in energy storage applications [22] such as in lithium-ion batteries [23]. Fe3O4/rGO nanocomposites can be used as photocatalytic material [24,25], for reducing heavy metals such as Cu +2 , Zn +2 , Ni +2 ions [26], Cr -2 [27][28][29][30], Pb 2+ [27,30], detecting Cd +2 [31] ions, degradation of phenol, as an antibacterial [25], for biosensing [31], and as an absorbent for removing dyes in aqueous solutions [32][33][34]. It has the potential to be used in a sensor to detect the presence of arsenic in mineral water [35,36], and wastewater treatment [37].…”