Structure and optical properties of Fe 3 O 4 nanoparticles synthesized by co-precipitation method with different organic modifiers

Radoń, Adrian; Drygała, A.; Hawełek, ᴌ.; Łukowiec, Dariusz

doi:10.1016/j.matchar.2017.06.034

Cited by 172 publications

(77 citation statements)

References 25 publications

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“…To expound the enhanced PS activation ability of the Fe3O4@GO nanocomposite, the UV-vis DRS spectra of Fe3O4 and GO were recorded, as shown in Figure 6b. An absorption edge at 648 nm was identified from the pristine Fe3O4, which can be attributed to the value of the intrinsic bandgap (≈2.69 eV) in the solid solution of Fe3O4 [47]. Compared with Fe3O4, Fe3O4@GO exhibited a remarkable and higher intensity of visible light absorption after 450 nm.…”

Section: Rhb Degradation Pathwaymentioning

confidence: 96%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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Persulfate (PS)-activated, iron-based heterogeneous catalysts have attracted significant attention as a potential advanced and sustainable water purification system. Herein, a novel Fe 3 O 4 impregnated graphene oxide (Fe 3 O 4 @GO)-activated persulfate system (Fe 3 O 4 @GO+K 2 S 2 O 8 ) was synthesized by following a sustainable protocol and was tested on real wastewater containing dye pollutants. In the presence of the PS-activated system, the degradation efficiency of Rhodamine B (RhB) was significantly increased to a level of ≈95% compared with that of Fe 3 O 4 (≈25%). The influences of different operational parameters, including solution pH, persulfate dosage, and RhB concentration, were systemically evaluated. This system maintained its catalytic activity and durability with a negligible amount of iron leached during successive recirculation experiments. The degradation intermediates were further identified through reactive oxygen species (ROS) studies, where surface-bound SO 4 − was found to be dominant radical for RhB degradation. Moreover, the degradation mechanism of RhB in the Fe 3 O 4 @GO+K 2 S 2 O 8 system was discussed. Finally, the results indicate that the persulfate-activated Fe 3 O 4 @GO catalyst provided an effective pathway for the degradation of dye pollutants in real wastewater treatment.Water 2020, 12, 733 2 of 17 many advantages, such as a higher redox potential, wide pH range (2-11), longer life span, and more efficiency over •OH that enables excellent electron transfer of the oxidant toward higher contaminant degradation [6,7]. In general, the production of sulfate radicals can be obtained through PS activation by using several strategies, such as heat, ultraviolet, ultrasound, transition metal ions, carbonaceous-based materials, base, phenol, glucose, and ascorbic acid [8]. Consequently, transition-metal-based catalysts have been widely utilized as a PS activator due to their excellent catalytic efficiency [9]. However, the drawbacks of transition-metal-based catalysts for inhomogeneous systems include poor removal efficiency, precipitation of iron (III) as sludge, and less reusability, which has hindered their widespread use [10]. Hence, transition-metal-based heterogeneous catalyst systems have received tremendous attention for PS activation because of their environmentally friendly nature, high performance, simple operation stability, and high availability [11]. Iron (Fe)-based heterogeneous catalyst materials (e.g., Fe 3 O 4 ) have received much attention regarding frequently activating PS because of their high natural abundance, low price, and they could easily prevent secondary pollution through their recovery performance [12]. However, Fe 3 O 4 nanoparticles usually tend to aggregate in the solution, which can decrease their surface area and cause lower stability and catalytic efficiency [13]. Taking this into consideration, it is necessary to use a proper support that can enhance their overall performance. Graphene has been widely reported to be an emerging supporting material f...

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Section: Rhb Degradation Pathwaymentioning

confidence: 96%

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Pervez

Zarra

et al. 2020

Water

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“…UV spectra of GO‐Fe 3 O 4 nanocomposites prepared with different GO:Fe 3 O 4 ratios (1:2–1:16) are given in Figure (b). Absorption peak between 330 and 450 nm resulted from the scattering and absorption of UV radiation of magnetic Fe 3 O 4 nanoparticles at this wavelength . In this region, the absorption properties of GO‐Fe 3 O 4 nanocomposites changes with the GO:Fe 3 O 4 ratio.…”

Section: Resultsmentioning

confidence: 99%

Novel approach in synthesizing ternary GO‐Fe₃O₄‐PPy nanocomposites for high Photothermal performance

Getiren

Çıplak

Gökalp

et al. 2019

J of Applied Polymer Sci

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In this study, graphene oxide‐iron oxide‐polypyrrole (GO‐Fe3O4‐PPy) ternary nanocomposites having high photothermal activity and stability are synthesized and analyzed using ultraviolet–visible (UV–Vis) spectroscopy, Fourier transform infrared (FTIR), X‐ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high‐resolution transmission electron microscopy (HRTEM), and magnetic hysteresis measurement (VSM). The effect of power density (1.5–2.5 W cm−2), concentration (0.01–0.2 mg mL−1), and component composition of nanocomposites on the photothermal properties in the near‐infrared (NIR) region (808 nm) is examined. The results show that superparamagnetic GO‐Fe3O4‐PPy ternary nanocomposite exhibits excellent photothermal performance. The temperature reaches to 55.5, 72.3, and 83.1 °C under the irradiation of the 808 nm NIR laser at 1.5, 2.0—, and 2.5 W cm−2 of power density for 10 min at 0.1 mg mL−1 photothermal therapy (PTT) agent, respectively, and moreover it has excellent photothermal stability. In summary, it is concluded that synthesized nanocomposites potentially may be used in simultaneous magnetic field‐guided treatments. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48837.

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“…[40,41] Aqueous dispersion of Fe 3 O 4 NPs shows a wide absorption band between 330-450 nm, which corresponds to the absorption and scattering of UV radiation by magnetic nanoparticles. [42][43][44] (Figure 1a) using Tauc's equation (Equation (4)). [45][46][47] In the equation, α is the absorption coefficient, v is the frequency of light, h is Planck's constant, hv is the photon energy, E g is optical band gap energy, K is a constant, and t is an index and ½ for direct transitions.…”

Section: Characterizationmentioning

confidence: 99%

NIR‐responsive Fe₃O₄@PPy nanocomposite for efficient potential use in photothermal therapy

Getiren

Çıplak

Gökalp

et al. 2020

J of Applied Polymer Sci

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In this work, superparamagnetic Fe3O4@PPy nanocomposite with core‐shell structure having strong near‐infrared (NIR) absorption is synthesized via a facile two‐step modified procedure. The prepared nanocomposite samples are characterized by UV–vis, FTIR, SEM, TEM, VSM, and XRD. The effects of laser power density (1.5–2.5 W cm−2) and aqueous concentration (0.01–0.2 mg ml−1) of the nanocomposite on the photothermal performance are investigated in the NIR region (808 nm). At 0.1 mg ml−1 concentration, the temperature reaches up to 50.1°C, 64.1°C, and 78.4°C within 10 min, under 1.5 W cm−2, 2.0 W cm−2, and 2.5 W cm−2 NIR laser power density values, respectively. Photothermal conservation efficiency is calculated as 43.9% and the nanocomposite exhibits excellent photothermal stability. In summary, the core‐shell Fe3O4@PPy nanocomposite is a promising candidate for photothermal therapy and simultaneous magnetic field‐guided treatments.

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Structure and optical properties of Fe 3 O 4 nanoparticles synthesized by co-precipitation method with different organic modifiers

Cited by 172 publications

References 25 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Novel approach in synthesizing ternary GO‐Fe₃O₄‐PPy nanocomposites for high Photothermal performance

NIR‐responsive Fe₃O₄@PPy nanocomposite for efficient potential use in photothermal therapy

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Structure and optical properties of Fe 3 O 4 nanoparticles synthesized by co-precipitation method with different organic modifiers

Cited by 172 publications

References 25 publications

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

New Sustainable Approach for the Production of Fe3O4/Graphene Oxide-Activated Persulfate System for Dye Removal in Real Wastewater

Novel approach in synthesizing ternary GO‐Fe3O4‐PPy nanocomposites for high Photothermal performance

NIR‐responsive Fe3O4@PPy nanocomposite for efficient potential use in photothermal therapy

Contact Info

Product

Resources

About

Novel approach in synthesizing ternary GO‐Fe₃O₄‐PPy nanocomposites for high Photothermal performance

NIR‐responsive Fe₃O₄@PPy nanocomposite for efficient potential use in photothermal therapy