Phase controlled synthesis of (Mg, Ca, Ba)-ferrite magnetic nanoparticles with high uniformity

Wang, S.F.; Li, Q.; Zu, Xiaotao; Xi, Xiang; Liu, W.; Li, S.

doi:10.1016/j.jmmm.2016.06.056

Cited by 46 publications

(7 citation statements)

References 49 publications

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“…The variation trend of particle size is consistent with the XRD results. The reason why the particle size of CuCr 2 O 4 and CuFe 2 O 4 is obviously larger than the crystallite size is that the particles observed by SEM may be composed of many grains. , …”

Section: Resultsmentioning

confidence: 99%

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Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Han

Wang

Chen

et al. 2022

ACS Appl. Nano Mater.

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A polyacrylamide gel method has been used to synthesize spinel type nano-CuB2O4 with cubic phase (B = Al) and tetragonal phase (B = Cr and Fe). The phase structure, functional group information, and charge state characterization confirm that the CuAl2O4 oxides contain no impurities, while CuCr2O4 and CuFe2O4 contain CuO impurities. The CuAl2O4 oxides exhibit a small particle size of 25 nm, high optical band gap (E g) value, high adsorption capacity for the adsorption of Congo red dye, and high photocatalytic activity for the photocatalytic degradation of tetracycline hydrochloride (TCH), which are much better than those of the CuCr2O4 and CuFe2O4 oxides. The high adsorption capacity for the CuAl2O4 oxides can be ascribed to the larger zero charge point (pHPZC) values, unique crystal structure, pore filling, electrostatic interaction, and hydrogen bond force. Photocatalytic degradation of antibiotics by CuB2O4 (B = Al, Cr, and Fe) shows high selectivity and B ion and crystal structure dependencies. The CuAl2O4 oxides exhibit high photocatalytic activity for the photocatalytic degradation of TCH and oxycline hydrochloride (OCH) and poor photocatalytic activity for the photocatalytic degradation of metformin hydrochloride (MFH) and naproxen sodium (NPS). Cyclic stability tests and XRD results further confirm that CuAl2O4 oxide is recyclable and stable. The high photocatalytic activity of CuAl2O4 oxides was explained in terms of the synergetic effects of the optical absorption coefficient, specific surface area, crystal structure, adsorbed oxygen concentration, chemical structure of the antibiotic, and conduction band and valence band potentials. The trapping experiments confirmed that TCH photodegradation in this reaction system occurs via photogenerated holes (hVB +) and superoxide radicals (•O2 –).

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Section: Resultsmentioning

confidence: 99%

“…CuFe 2 O 4 is obviously larger than the crystallite size is that the particles observed by SEM may be composed of many grains. 57,58 The surface morphology of CuAl 2 O 4 was further characterized and analyzed by TEM due to the small particle size and high phase purity of CuAl 2 O 4 . Figure 4d S3).…”

Section: Ftir and Xps Analysismentioning

confidence: 99%

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Han

Wang

Chen

et al. 2022

ACS Appl. Nano Mater.

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“…The results show that the characteristic absorption band at 3444 cm −1 is attributed to the O─H stretching vibration, while the characteristic absorption band at 1638 cm −1 is determined to be the stretching vibration of adsorption water. [33][34][35] For the MFO, the characteristic absorption band at 571 and 424 cm −1 can be ascribed to the Fe─O in Fe 2 O 3 and the Fe─O vibration of the octahedral site in spinel MFO, respectively. [36][37][38][39][40][41][42][43] It is worth noting that the Fe─O vibration of MFO is located at 567 cm −1 , and this characteristic peak almost coincides with the characteristic peak of Fe─O bond in Fe 2 O 3 , which is the main reason why this characteristic peak has a wider half-height width than the characteristic peak reported in the literature.…”

Section: Phase Structure and Puritymentioning

confidence: 99%

Designing of Z‐Scheme MgFe₂O₄/Fe₂O₃ Coupled CoCr₂O₄ Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater

Gao,

Angadi,

Wang

et al. 2023

Advanced Sustainable Systems

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A simple solution combustion method is used to synthesize spinel type MgFe2O4 (MFO) and CoCr2O4 (CCO) oxides, which are combined with the mechanical mixing method to construct a Z‐scheme MFO/wt%CCO heterojunction, which effectively degraded tetracycline hydrochloride (TC) under simulated sunlight irradiation. Various characterization techniques are used to confirm the phase structure, composition, near‐spherical morphology, ferromagnetic behavior, optical properties, and photocatalytic activity of Z‐scheme MFO/wt%CCO heterojunction. A variety of environmental experimental parameters confirmed that when the optimal initial TC concentration is 50 mg L−1, the catalyst content is 1 g L−1, and pH 13, the degradation percentage of TC by the MFO/75%CCO composites reached 89%. Active species verification experiments showed that the hole (h+), hydroxyl radical (•OH), and superoxide radical (•O2 −) are the main active species in photocatalytic reactions. Based on mass spectrometry, toxicity analysis, and energy band theory, the degradation pathway, toxicity, and photocatalytic mechanism of MFO/75%CCO composites for the degradation of TC are discussed in detail.

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“…Ferrites can be classified as hexagonal, cubic and orthorhombic ferrites based on their crystallographic structure. Both cubic MFe2O4 (M = Mg, Mn, Ni or Co) and orthorhombic MFe2O4 (M = Ba or Ca) are promising magnetic materials for microelectronic applications (Pereira 2012;Wang 2016).…”

Section: Introductionmentioning

confidence: 99%

Co-Precipitation Synthesis of MnFe2O4 and CoFe2O4 Nanoparticles

2022

CMR

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Nano-sized magnetic manganese ferrite, cobalt ferrite particles were produced by a co-precipitation method at room temperature. The effects of pH value of solutions, where the particles were synthesized, on the morphology and crystal structure of the MnFe2O4 and CoFe2O4 particles were investigated. The particles were pure and nearly spherical shaped. The sizes of synthesized magnetic nanoparticles had between 55 nm and 84 nm, with uniform morphologies. As the pH value increased, the diameter of the synthesized particles decreased and agglomeration of the nanoparticles increased.

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Phase controlled synthesis of (Mg, Ca, Ba)-ferrite magnetic nanoparticles with high uniformity

Cited by 46 publications

References 49 publications

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Designing of Z‐Scheme MgFe₂O₄/Fe₂O₃ Coupled CoCr₂O₄ Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater

Co-Precipitation Synthesis of MnFe2O4 and CoFe2O4 Nanoparticles

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Phase controlled synthesis of (Mg, Ca, Ba)-ferrite magnetic nanoparticles with high uniformity

Cited by 46 publications

References 49 publications

Spinel CuB2O4 (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Spinel CuB2O4 (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Designing of Z‐Scheme MgFe2O4/Fe2O3 Coupled CoCr2O4 Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater

Co-Precipitation Synthesis of MnFe2O4 and CoFe2O4 Nanoparticles

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Product

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Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Spinel CuB₂O₄ (B = Fe, Cr, and Al) Oxides for Selective Adsorption of Congo Red and Photocatalytic Removal of Antibiotics

Designing of Z‐Scheme MgFe₂O₄/Fe₂O₃ Coupled CoCr₂O₄ Heterojunction with High Photocatalytic Activity for the Removal of Tetracycline Hydrochloride in Wastewater