Iron-Based Nanoparticles for Toxic Organic Degradation: Silica Platform and Green Synthesis

Meeks, Noah D.; Smuleac, V.; Stevens, Christopher; Bhattacharyya, Dibakar

doi:10.1021/ie301031u

Cited by 29 publications

(10 citation statements)

References 54 publications

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“…Magnetic metal-ceramic nanocomposites, consisting of a dispersion of transition metal (TM = Fe, Co, Ni) nanoparticles into a ceramic matrix, are being actively studied in view of a variety of applications associated with their porous structure, ranging from environmental issues (e.g., water remediation [45][46][47], treatment of pollutants [48][49][50][51][52]) to catalysis [53][54][55][56] and biomedicine [57,58]).…”

Section: Ceramic Nanocompositesmentioning

confidence: 99%

Magnetic Properties of Nanocomposites

et al. 2019

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The magnetic properties of various families of nanocomposite materials containing nanoparticles of transition metals or transition-metal compounds are reviewed here. The investigated magnetic nanocomposites include materials produced either by dissolving a ferrofluid containing pre-formed nanoparticles of desired composition and size in a fluid resin submitted to subsequent curing treatment, or by generating the nanoparticles during the very synthesis of the embedding matrix. Two typical examples of these production methods are polymer nanocomposites and ceramic nanocomposites. The resulting magnetic properties turn out to be markedly different in these two classes of nanomaterials. The control of nanoparticle size, distribution, and aggregation degree is easier in polymer nanocomposites, where the interparticle interactions can either be minimized or exploited to create magnetic mesostructures characterized by anisotropic magnetic properties; the ensuing applications of polymer nanocomposites as sensors and in devices for Information and Communication Technologies (ICT) are highlighted. On the other hand, ceramic nanocomposites obtained from transition-metal loaded zeolite precursors exhibit a remarkably complex magnetic behavior originating from the simultaneous presence of zerovalent transition-metal nanoparticles and transition-metal ions dissolved in the matrix; the applications of these nanocomposites in biomedicine and for pollutant remediation are briefly discussed.

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Section: Ceramic Nanocompositesmentioning

confidence: 99%

Magnetic Properties of Nanocomposites

et al. 2019

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“…It was found that MB degradation in the Fe 3 O 4 /Mn 3 O 4 /rGO/PMS system is well formulated by a pseudosecond-order kinetics (Eq.1). The result is shown in Table 2 41,42 . The relationship between reaction rate and temperature reveals that the PMS activation process is an endothermic reaction: higher temperature would drive the reaction to produce more 15 active sulfate and hydroxyl radicals and thus enhance the MB degradation efficiency.…”

Section: Effect Of Different Operating Parameters On the Catalytic Acmentioning

confidence: 99%

Facile synthesis of Fe₃O₄/hierarchical-Mn₃O₄/graphene oxide as a synergistic catalyst for activation of peroxymonosulfate for degradation of organic pollutants

et al. 2015

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Highly effective Fe 3 O 4 /Mn 3 O 4 /reduced graphene oxide (rGO) hybrids were synthesized as a heterogeneous catalyst for the degradation of organic dyes in the aqueous solution using sulfate radicalbased advanced oxidation processes. The physicochemical properties of the composite were characterized 10 by several techniques, such as X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmelt-Teller (BET). The effects of different parameters on the catalytic activity of Fe 3 O 4 /Mn 3 O 4 /rGO, including initial Methylene Blue (MB) concentration, peroxymonosulfate (PMS) concentration, catalyst dosage, pH value, and temperature, were assessed. Typically, 98.8% removal of 50 15 mg/L of MB and 68.3% reduction of TOC could be achieved in 30 min under the conditions: temperature 25 °C, 100 mg/L of catalyst, and PMS dosage 0.3 g/L, showing a significant enhancement of the catalyst in the degradation of organic pollutants in aqueous solution Compared with Fe 3 O 4 /rGO and Mn 3 O 4 /rGO. The catalyst exhibited high stability and good reusability according to three successive repeated reactions. Based on the radical experiments, the catalytic activity of Fe 3 O 4 /Mn 3 O 4 /rGO hybrids for degradation of 20 MB is closely related with the amount of the sulfate and hydroxyl radicals generated from PMS. The excellent catalytic performance of the Fe 3 O 4 /Mn 3 O 4 /rGO is mainly attributed to the synergistic effects of Fe 3 O 4 , Mn 3 O 4 , rGO, and Oxone. 65 supporting metal and metal oxides attributed to its high electrical conductivities, unique mechanical strength, and large specific surface areas 10,11 . It has been found that graphene can This journal is © The Royal Society of Chemistry [year] conditions: catalyst = 100 mg/L, PMS dose = 0.3 g/L, initial MB concentration = 50 mg/L. pH=7.0, T = 25 °C) Fig. 6 MB degradation in the Fe3O4/Mn3O4/rGO/PMS system: the effect of initial MB concentration (a), the effect of catalyst dosage (b), the effect of PMS dosage (c), and the effect of initial pH value (d). (Except for the investigated parameter, other parameters fixed on: catalyst = 100 mg/L, Oxone dose = 0.3 g/L, initial MB concentration = 50 mg/L, pH=7.0, and T = 25 °C) 60The effect of reaction temperature on MB degradation was also investigated and the results were shown in Fig. 7. A general trend

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“…In the last decade, the scientific interest towards magnetic nanostructured / nanocomposite materials has steadily increased owing to their functional properties associated with widespread applications ranging from electronics [1], magneto-optics and photocatalysis [2][3][4][5] to supercapacitors [6,7], hyperthermia [8], drug delivery [9,10], water remediation [11], energy harvesting [12]. Oxides of transition metals / rare earths have received particular attention because of the concurrence of magnetic effects and semiconducting-like properties [3,12,13] Magnetic metal-ceramic nanocomposites, consisting of a dispersion of Fe 0 , Co 0 , or Ni 0 nanoparticles into a prevailingly amorphous silica and alumina ceramic matrix, are an important sub-class of nanomaterials whose fields of application are typically associated with their porous structure, which makes them particularly suitable for use in environmental protection [14][15][16][17][18][19][20][21][22], catalysis [23][24][25][26][27][28] and biomedicine [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Magnetic clustering of Ni2+ ions in metal-ceramic nanocomposites obtained from Ni-exchanged zeolite precursors

Barrera

Tiberto

Esposito

et al. 2018

Ceramics International

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Metal-ceramic nanocomposites containing nominal 15% wt. Ni were produced by a smart, scalable process involving a suitable thermal treatment of Ni-exchanged zeolite precursors, and were investigated by dc magnetic techniques between 2 and 300 K. Two main magnetic phases were detected in all studied materials: globular magnetic nanoparticles with average diameters in the 10-20 nm range, and Ni2+ ions embedded in the host ceramic matrix. The blocking temperature of Ni0 nanoparticles is well above room temperature. The magnetic signal from nanoparticles dominates at high temperature; however, a clear paramagnetic signal from Ni2+ ions emerges when the temperature is decreased. The magnetic moment per Ni ion is in agreement with typical values found in Ni-containing zeolites. Magnetic susceptibility and FC/ZFC curves point to the existence of a weak interaction among Ni2+ ions (Néel temperature TN < 15 K) which results in the formation of ferrimagnetic-like clusters below about 30 K. In each cluster, the individual magnetic moments respond in a collective way with blocking temperatures less than 5 K.

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Iron-Based Nanoparticles for Toxic Organic Degradation: Silica Platform and Green Synthesis

Cited by 29 publications

References 54 publications

Magnetic Properties of Nanocomposites

Magnetic Properties of Nanocomposites

Facile synthesis of Fe₃O₄/hierarchical-Mn₃O₄/graphene oxide as a synergistic catalyst for activation of peroxymonosulfate for degradation of organic pollutants

Magnetic clustering of Ni2+ ions in metal-ceramic nanocomposites obtained from Ni-exchanged zeolite precursors

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Iron-Based Nanoparticles for Toxic Organic Degradation: Silica Platform and Green Synthesis

Cited by 29 publications

References 54 publications

Magnetic Properties of Nanocomposites

Magnetic Properties of Nanocomposites

Facile synthesis of Fe3O4/hierarchical-Mn3O4/graphene oxide as a synergistic catalyst for activation of peroxymonosulfate for degradation of organic pollutants

Magnetic clustering of Ni2+ ions in metal-ceramic nanocomposites obtained from Ni-exchanged zeolite precursors

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Facile synthesis of Fe₃O₄/hierarchical-Mn₃O₄/graphene oxide as a synergistic catalyst for activation of peroxymonosulfate for degradation of organic pollutants