The effect of an external magnetic field on the photocatalytic activity of CoFe2O4 particles anchored in carbon cloth

In this work, the iron oxide (Fe2O3) nanoflakes on carbon cloth (Fe2O3@CC) were triumphantly prepared and served as the electrode of supercapacitors. By applying an external magnetic field, we first find that the magnetic field could suppress the polarization phenomenon of electrochemical performance. Then, the influences of the mono-/bi-valent cations on the electrochemical properties of the Fe2O3@CC were investigated under a large external magnetic field (1 T) in this work. The chemical valences of the cations in the aqueous electrolytes (LiNO3 and Ca(NO3)2) have almost no influences on the specific capacitance at different scan rates. As one of important parameters to describe the electrochemical properties, the working potential window of the Fe2O3@CC electrode was also investigated in this work. The broad potential window in room-temperature molten salt (LiTFSI + LiBETI (LiN(SO2CF3)2 + LiN(SO2C2F5)2)) has been obtained and reached 1.2 V, which is higher than that of the traditional aqueous electrolyte (~0.9 V).

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A novel Fe2O3–Fe3O4@SiO2@TiO2–TNS–GR magnetic composite with an enhanced visible photocatalytic property

Functional Materials Letters ◽

10.1142/s1793604719500061 ◽

2019 ◽

Vol 12 (02) ◽

pp. 1950006 ◽

Cited By ~ 5

Author(s):

Weiqiang Yang ◽

Xiaowen Liu

Keyword(s):

Magnetic Field ◽

Photocatalytic Activity ◽

External Magnetic Field ◽

Degradation Rate ◽

Solvothermal Method ◽

Photocatalytic Property ◽

Magnetic Composite ◽

Sem Images ◽

Xrd Diffraction ◽

Diffraction Patterns

A novel magnetic Fe2O3–Fe3O4@SiO2@TiO2–TNS–GR had been synthesized via a solvothermal method. The XRD diffraction patterns and SEM images showed that the magnetite Fe2O3–Fe3O4 core was coated with amorphous SiO2 sheel and anatase sheel successively. TiO2 nanosheets (TNS) and Fe2O3–Fe3O4@SiO2@TiO2 had been loaded on the graphene (GR) sheets successfully. The degradation rate of Fe2O3–Fe3O4@SiO2@TiO2–TNS–GR for rhodamine B (RhB) under visible light irradiation reached 93.34%, which was much higher than that of Fe3O4@SiO2–TNS–GR. The Fe3O4 made the composite to be easily separated from the suspension with an external magnetic field, and [Formula: see text]-Fe2O3 had enhanced the photocatalytic activity of the composite.

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The Use of Ultra-Small Fe3O4 Magnetic Nanoparticles for Hydrothermal Synthesis of Fe3+-Doped Titanate Nanotubes

Materials ◽

10.3390/ma13204612 ◽

2020 ◽

Vol 13 (20) ◽

pp. 4612

Author(s):

Maciej Marć ◽

Lidia Najder-Kozdrowska ◽

Nikos Guskos ◽

Grzegorz Żołnierkiewicz ◽

Ana Maria Montero ◽

...

Keyword(s):

Magnetic Field ◽

Photocatalytic Activity ◽

Magnetic Nanoparticles ◽

Hydrothermal Synthesis ◽

External Magnetic Field ◽

Room Temperature ◽

Magnetic Measurements ◽

Room Temperature Ferromagnetism ◽

Titanate Nanotubes ◽

Fe3o4 Magnetic Nanoparticles

A method of the hydrothermal synthesis of Fe3+-doped titanate nanotubes (TNT) is reported in which the ultra-small Fe3O4 nanoparticles are used as the sources of Fe3+ ions. The magnetic nanoparticles with a diameter of about 2 nm are added during the washing stage of the hydrothermal procedure. During washing, they gradually degrade and at the same time, the titanate product is transformed into nanotubes. The obtained nanotubes were characterized by structural and magnetic measurements. It was found that, depending on the value of the external magnetic field, they may show the property of room temperature ferromagnetism, paramagnetism or they may be diamagnetic. It was also shown that the modified TNTs have greater photocatalytic activity compared to unmodified TNTs.

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Synthesis of Magnetic Fe3O4@TiO2 Nanocomposite and its Photocatalytic Property

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.117 ◽

2012 ◽

Vol 535-537 ◽

pp. 117-120 ◽

Cited By ~ 1

Author(s):

Ding Zhen Wang ◽

Li Na An ◽

Xiao Bo Zhang ◽

Xiao Yun Li ◽

Jianjun Shi

Keyword(s):

Magnetic Field ◽

Photocatalytic Activity ◽

Hydrothermal Synthesis ◽

External Magnetic Field ◽

Hydrazine Hydrate ◽

Outer Surface ◽

Synthesis Method ◽

Photocatalytic Property ◽

Reduction Process ◽

Facile Hydrothermal Method

A facile hydrothermal method has been developed for synthesis of nanocapsual-shaped α-Fe2O3using FeCl3•6H2O as iron source, 4, 4–bipyridine and thiourea as surfactant, and then the above α-Fe2O3sample’s outer surface were coated with TiO2and obtained nanocomposite of α-Fe2O3@TiO2. Magnetic nanocomposite (Fe3O4@ TiO2) were obtained by a reduction process with the above α-Fe2O3@ TiO2products as starting materials by hydrothermal synthesis method using hydrazine hydrate as reductant. The as-prepared Fe3O4@TiO2samples have good photocatalytic activity and it can photocatalyze RhB at the condition of the external magnetic field

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