Abstract:A magnetic solid-phase microextraction procedure was developed to detect lead in aqueous samples by flame atomic absorption spectrometry (FAAS). Fe 3 O 4 nanoparticles were synthesized by coprecipitation and the crystalline phase was confirmed by X-ray diffraction. The point of zero charge (PZC) indicated that the oxide surface was negatively charged at pH levels above 9.4. pH 9.0 is the best for adsorption and the influence of stirring time and adsorbent mass were analyzed and set at 4 min and 3.0 mg, respect… Show more
“…Figure 10 gathers the FTIR spectra of Fe 3 O 4 NPs synthesized at different concentrations by the fruit peel extract of Punica granatum L. after the annealing shows peaks at 515 and 567 cm −1 , which are attributed to the stretching vibration modes of Fe-O bonds in the magnetite Fe 3 O 4 NPs. 63 , 64 Iron oxide synthesis was verified by these distinct peaks in the region between [400 and 600] cm −1 , as these extended peaks corresponded perfectly to Fe 3 O 4 NPs. 65 The 2360 cm −1 band is due to atmospheric CO 2 .…”
Green biosynthesis of Fe3O4 nanoparticles (NPs) using plant extract is desired, as the plant extract is safe for humans and the environment. In this study, magnetite Fe3O4 NPs were greenly prepared using Punica granatum L. fruit peel extract as a reducing and capping agent. The effect of iron precursor contraction (0.01–0.1 M, FeCl3) was studied. The Fe3O4 crystalline with an average crystallite size range from 21 to 23 nm was proven by X-ray powder diffraction. Scanning electron microscopy images showed that the synthesized Fe3O4 NPs were mostly cubical. Ultraviolet-visible spectra showed that the prepared Fe3O4 NPs exhibit absorption at 270 nm related to the Fe3O4 NPs with a direct bandgap ranging from 1.87 to 2.26 eV and indirect bandgap of 2.16–2.48 eV. Fourier transform infrared spectroscopy analysis showed two characteristic absorption bands at 515 and 567 cm−1, which proved the successful formation of Fe3O4. The proposed method using Punica granatum L. fruit peel extract offers an economical and environmentally friendly route for synthesizing many other types of metal oxides.
“…Figure 10 gathers the FTIR spectra of Fe 3 O 4 NPs synthesized at different concentrations by the fruit peel extract of Punica granatum L. after the annealing shows peaks at 515 and 567 cm −1 , which are attributed to the stretching vibration modes of Fe-O bonds in the magnetite Fe 3 O 4 NPs. 63 , 64 Iron oxide synthesis was verified by these distinct peaks in the region between [400 and 600] cm −1 , as these extended peaks corresponded perfectly to Fe 3 O 4 NPs. 65 The 2360 cm −1 band is due to atmospheric CO 2 .…”
Green biosynthesis of Fe3O4 nanoparticles (NPs) using plant extract is desired, as the plant extract is safe for humans and the environment. In this study, magnetite Fe3O4 NPs were greenly prepared using Punica granatum L. fruit peel extract as a reducing and capping agent. The effect of iron precursor contraction (0.01–0.1 M, FeCl3) was studied. The Fe3O4 crystalline with an average crystallite size range from 21 to 23 nm was proven by X-ray powder diffraction. Scanning electron microscopy images showed that the synthesized Fe3O4 NPs were mostly cubical. Ultraviolet-visible spectra showed that the prepared Fe3O4 NPs exhibit absorption at 270 nm related to the Fe3O4 NPs with a direct bandgap ranging from 1.87 to 2.26 eV and indirect bandgap of 2.16–2.48 eV. Fourier transform infrared spectroscopy analysis showed two characteristic absorption bands at 515 and 567 cm−1, which proved the successful formation of Fe3O4. The proposed method using Punica granatum L. fruit peel extract offers an economical and environmentally friendly route for synthesizing many other types of metal oxides.
“…While the bands at ν 763 and 694 cm −1 revealed the stretching (W–O) and the band at ν 713 cm −1 is due to stretching (W–O-W) 67 . On the other hand, the FTIR spectrum of synthesized Fe 2 O 3 MNPs shows characteristic peaks also at the broadband at around 624–425 cm −1 revealing the vibrations of the Fe–O bonds of the magnetite 68 . Figure 2 FT-IR spectra of synthesized magnetic NPs as Fe 2 O 3 , Fe 2 O 3 @CuO and WO 3 (down-to-up); respectively.…”
Due to their high specific surface area and its characteristic’s functionalized nanomaterials have great potential in medical applications specialty, as an anticancer. Herein, functional nanoparticles (NPs) based on iron oxide Fe2O3, iron oxide modified with copper oxide Fe2O3@CuO, and tungsten oxide WO3 were facile synthesized for biomedical applications. The obtained nanomaterials have nanocrystal sizes of 35.5 nm for Fe2O3, 7 nm for Fe2O3@CuO, and 25.5 nm for WO3. In addition to octahedral and square nanoplates for Fe2O3, and WO3; respectively. Results revealed that Fe2O3, Fe2O3@CuO, and WO3 NPs showed remarked anticancer effects versus a safe effect on normal cells through cytotoxicity test using MTT-assay. Notably, synthesized NPs e.g. our result demonstrated that Fe2O3@CuO exhibited the lowest IC50 value on the MCF-7 cancer cell line at about 8.876 µg/ml, compared to Fe2O3 was 12.87 µg/ml and WO3 was 9.211 µg/ml which indicate that the modification NPs Fe2O3@CuO gave the highest antiproliferative effect against breast cancer. However, these NPs showed a safe mode toward the Vero normal cell line, where IC50 were monitored as 40.24 µg/ml for Fe2O3, 21.13 µg/ml for Fe2O3@CuO, and 25.41 µg/ml for WO3 NPs. For further evidence. The antiviral activity using virucidal and viral adsorption mechanisms gave practiced effect by viral adsorption mechanism and prevented the virus from replicating inside the cells. Fe2O3@CuO and WO3 NPs showed a complete reduction in the viral load synergistic effect of combinations between the tested two materials copper oxide instead of iron oxide alone. Interestingly, the antimicrobial efficiency of Fe2O3@CuO NPs, Fe2O3NPs, and WO3NPs was evaluated using E. coli, S. aureus, and C. albicans pathogens. The widest microbial inhibition zone (ca. 38.45 mm) was observed with 250 mg/ml of WO3 NPs against E. coli, whereas using 40 mg/ml of Fe2O3@CuO NPS could form microbial inhibition zone ca. 32.86 mm against S. aureus. Nevertheless, C. albicans was relatively resistant to all examined NPs. The superior biomedical activities of these nanostructures might be due to their unique features and accepted evaluations.
“…28 These vibrational features were observed in a wavenumber range of approximately 441 to 699 cm −1 . 29 Furthermore, it is noteworthy that the intense vibration seen at 1014 cm −1 corresponds to the bending vibration of hydroxyl (–OH) modes in γ-FeOOH. 30 The vibration characteristics of the composite sponges exhibited a strong resemblance to those of pure latex, with the exception of a notable increase in intensity at 1014 cm −1 , which was dependent on the loading of IO.…”
Utilizing well-established foam production technology facilitates the scalability of the methodology described in this study, allowing SSG materials to rapidly transition from the laboratory to commercial and real-world applications.
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