Fabrication of MgFe2O4–ZnO heterojunction photocatalysts for application of organic pollutants

Su, Na; Lv, Pin; Li, Meijing; Zhang, Xiaolin; Li, Minghui; Niu, Jiasheng

doi:10.1016/j.matlet.2013.12.106

Cited by 71 publications

(21 citation statements)

References 18 publications

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“…Among various semiconductors employed, zinc oxide (ZnO) is well known to be an excellent photocatalyst [2][3] . Some researchers have reported that ZnO as photocatalyst exhibit superior advantages than the others, which is ascribed to its higher quantum efficiency, chemical stability, non-toxicity, and lower cost 4,5 . Unfortunately, ZnO has a wide band gap (~3.37 eV), which is unfavorable for absorption well of visible light of solar 6,7 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Rahmayeni¹,

Zulhadjri²,

Jamarun³

et al. 2016

Orient. J. Chem

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ZnO-NiFe 2 O 4 magnetic nanocomposite photocatalysts were successfully synthesized by simple solvothermal method using nitric salts as starting materials and ethanol as solvent. The synthesized samples were characterized by XRD, FESEM-EDX, TEM, DRS-UV-vis, VSM, and FTIR instruments. Photocatalytic activity of the samples was evaluated by dye degradation under solar light irradiation. The results show that the diffraction peaks of nanocomposites correspond to the hexagonal wurzite of ZnO and spinal cubic structure of NiFe 2 O 4 . The microstructure studies revealed that nanocomposites were dominated by granular-like of ZnO nanoparticles were synthesized at 180°C and rod-like at 200°C. The estimated band gap value of ZnO-NiFe 2 O 4 (1:0.01) nanocomposites is 2.78 eV which is lower than ZnO. The magnetic saturation (Ms) result showed a superparamagnetic behavior for nanocomposites. It was found that the photocatalytic activity of synthesized nanocomposites were higher than ZnO and NiFe 2 O 4 .

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Section: Introductionmentioning

confidence: 99%

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Rahmayeni¹,

Zulhadjri²,

Jamarun³

et al. 2016

Orient. J. Chem

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“…The materials used in this work were Zn(NO 3 3 .9H 2 O as starting materials were dissolved in 40 mL distilled water under stirring at 500 rpm in rapid to obtain a mixed solution. The solution pH was adjusted to 12 with NaOH 2 M was added drop wise.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, a number of studies related to the syntheses of ZnO photocatalysts have been reported, including nanoparticles, nanorods, nanocrystals, nanotubes, and composite membrane 1,2 . In fact, many of obtained products have the photocatalytic activities of ZnO are limited to irradiation wavelengths in the UV region which take only about 3-5% of the solar spectrum because they have wide band-gaps so it is not effective to be used in the visible light region of the sun [3][4][5] . Rapid recombination of photo generated electron-hole pairs still remains a problem to be solved in its application.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Separable ZnO-MnFe2O4 Nanocomposites Synthesized in organic-free Media for dye Degradation Under Natural Sunlight

Rahmayeni¹,

Arief²,

Jamarun³

et al. 2017

Orient. J. Chem

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Magnetically separable ZnO-MnFe 2 O 4 nanocomposites were synthesized in organic-free media. The samples were characterized by several techniques. The photocatalytic activities of the nanocomposites were tested by degradation of Rhodamine B and wastewater of batik dye under natural sunlight irradiation. X-ray diffraction (XRD) pattern of composites is well in agreement with the standard of the hexagonal wurtzite phase of ZnO and spinel cubic phase of MnFe 2 O 4 . Scanning Electron Microscope (SEM) image illustrates the morphology of the nanocomposites are square plate-like and porous. The magnetic properties of composites were characterized by Vibrating Sample Magnetometer (VSM) show the superparamagnetic properties of all nanocomposites. Optical properties study indicated that addition of MnFe 2 O 4 to ZnO decreases the band gap. The removal of Rhodamine B (10 mg L −1 ) and wastewater of batik dye solution by ZnO-MnFe 2 O 4 (1:0.1) composite after 3 h reached 96.7% and 95.1 %.

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“…The typical degree of inversion is 0.9 but can vary depending on the preparation conditions [4,5]. MFO possesses good chemical stability, and its band gap of ~2.0 eV makes it a suitable candidate for a wide range of applications in heterogeneous catalysis, adsorption, sensors, lithium-ion batteries, and photo electrochemical water splitting [6][7][8][9][10]. Moreover, it has a high Curie temperature, making it interesting for spintronic applications.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, it has a high Curie temperature, making it interesting for spintronic applications. To date, most studies on MgFe 2 O 4 have focused on its different morphological varieties, such as nanoparticles [6][7][8][9][10] or nanopillars [11]. However, less attention has been paid to epitaxial MgFe 2 O 4 thin films even though they are of great interest from both fundamental and practical perspectives.…”

Section: Introductionmentioning

confidence: 99%

Growth and characterization of epitaxial magnesium ferrite thin films

et al. 2016

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Epitaxial magnesium ferrite thin films have been grown by molecular beam epitaxy (MBE) on MgO(100). Growth conditions such as substrate temperature and growth rates were optimized. By using different characterization techniques, structural, electrical and optical properties of the films were studied as a function of Mg content. In particular, we highlight the importance of the growth rate on the actual Mg/Fe ratio in the film.

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Fabrication of MgFe2O4–ZnO heterojunction photocatalysts for application of organic pollutants

Cited by 71 publications

References 18 publications

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Synthesis of Zno-Nife2o4 Magnetic Nanocomposites by Simple Solvothermal Method for Photocatalytic Dye Degradation Under Solar Light

Magnetically Separable ZnO-MnFe2O4 Nanocomposites Synthesized in organic-free Media for dye Degradation Under Natural Sunlight

Growth and characterization of epitaxial magnesium ferrite thin films

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