Fabrication of magnetically recyclable SnO2-TiO2/CoFe2O4 hollow core-shell photocatalyst: Improving photocatalytic efficiency under visible light irradiation

Huang, Jing; Jing, Hongxia; Li, Na; Li, Long-xiang; Jiao, Weizhou

doi:10.1016/j.jssc.2018.12.028

Cited by 29 publications

(10 citation statements)

References 35 publications

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“…Figure 4 shows that the bandgap values are 1.7, 2.4, and 2.9 eV for NiF, NiT, and NiTG, respectively. As reported by the formula λ = 1240/ Eg , the respective core@shell nanophotocatalysis wavelength absorption is found to be 729, 516, and 427 nm for NiF, NiT, and NiTG [ 67 ]. Normally, TiO 2 has a bandgap energy of around 3 eV, whereas NiT shows an energy bandgap of 2.9 eV ( Figure 4(b) ).…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Core‐Shell NiFe₂O₄ Shield with TiO₂/rGO Nanostructures for Biomedical and Environmental Applications

Nimshi

Vijaya

Al-Najar

et al. 2022

Bioinorganic Chemistry and Applications

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Multifunctional core@shell nanoparticles have been synthesized in this paper through 3 stages: NiFe2O4 nanoparticles by microwave irradiation using Pedalium murex leaf extract as a fuel, core@shell NiFe2O4@TiO2 nanoparticles by sol-gel, and NiFe2O4@TiO2@rGO by sol-gel using preprepared reduced graphene oxide obtained by modified Hummer’s method. XRD analysis confirmed the presence of both cubic NiFe2O4 spinel and tetragonal TiO2 rutile phases, while Raman spectroscopy analysis displays both D and G bands (ID/IG = 1.04) associated with rGO. Morphological observations by HRTEM reveal a core-shell nanostructure formed by NiFe2O4 core as confirmed by SAED with subsequent thin layers of TiO2 and rGO. Magnetic measurements show a ferromagnetic behavior, where the saturation magnetization drops drastically from 45 emu/g for NiFe2O4 to 15 emu/g after TiO2 and rGO nonmagnetic bilayers coating. The as-fabricated multifunctional core@shell nanostructures demonstrate tunable self-heating characteristics: rise of temperature and specific absorption rate in the range of ΔT = 3–10°C and SAR = 3–58 W/g, respectively. This effectiveness is much close to the threshold temperature of hyperthermia (45°C), and the zones of inhibition show the better effective antibacterial activity of NTG against various Gram-positive and Gram-negative bacterial strains besides simultaneous good efficient, stable, and removable sonophotocatalyst toward the TC degradation.

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Section: Resultsmentioning

confidence: 99%

Multifunctional Core‐Shell NiFe₂O₄ Shield with TiO₂/rGO Nanostructures for Biomedical and Environmental Applications

Nimshi

Vijaya

Al-Najar

et al. 2022

Bioinorganic Chemistry and Applications

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“…A CoFe 2 O 4 @ hollow@ mesoporous TiO 2 yolk–shell structure was prepared by etching silica intermediate layer . Typically, the obtained CoFe 2 O 4 /SiO 2 /mesoporous TiO 2 composite was dispersed in NaOH solution (2 M, 60 mL).…”

Section: Materials and Methodsmentioning

confidence: 99%

“…The interlayer of SiO 2 was prepared through a modified Stober method. 44 In a typical process, 20 mL of the as-prepared CoFe 2 O 4 suspension was added in 60 mL of absolute ethanol. Then, the suspension was dispersed under ultrasound for 15 min.…”

Section: Methodsmentioning

confidence: 99%

From Core–Shell to Yolk–Shell: Improved Catalytic Performance toward CoFe₂O₄@ Hollow@ Mesoporous TiO₂ toward Selective Oxidation of Styrene

Liu

Fang

et al. 2020

Ind. Eng. Chem. Res.

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Developing catalysts with structural characteristics, reusability, cost-effectiveness, environmental friendliness, and preferable catalytic performance is challenging for the selective oxidation of alkenes. In this article, we report the synthesis of magnetically separable CoFe 2 O 4 @ hollow@ mesoporous TiO 2 with yolk−shell structure, which could be used as a selectivity variable and stable catalyst for the selective oxidation of styrene, yielding different oxidation products. With oxygen as the oxidant, epoxidation of styrene occurred, affording an epoxy group. With hydrogen peroxide as the oxidant, oxidative cleavage of double bonds in the styrene and further oxidation were conducted, affording a carboxylic acid group. Compared with pristine CoFe 2 O 4 , TiO 2 , and CoFe 2 O 4 /TiO 2 core−shell structure, the CoFe 2 O 4 @ hollow@ mesoporous TiO 2 with yolk−shell structure was found to be a more efficient catalyst for the oxidation of styrene. Meanwhile, the kinetic analysis and activation energies of different catalysts were investigated to illustrate the relationship between the performance and the structure of catalysts. Active radical scavenging experiments were conducted to figure out the dominant radicals in the oxidation reaction. The corresponding possible reaction mechanisms of the oxidation reaction were also proposed.

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“…Semiconductor-based photocatalysts have attracted more and more attention, since Fujishima’s team found water splitting with TiO 2 in 1972 [ 1 ]. Especially in recent years, many promising semiconductor photocatalysts, such as TiO 2 [ 2 , 3 , 4 , 5 ], ZnO [ 6 , 7 , 8 ] and SnO 2 [ 9 , 10 , 11 , 12 ], have been widely reported. Among those, graphite-like phase carbon nitride (g-C 3 N 4 ), with inexpensive, physicochemical stability and suitable potentials, has been extensively used to degrade refractory organic contaminants and hydrogen production as new metal-free semiconductor photocatalysts [ 1 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Especially in recent years, many promising semiconductor photocatalysts, such as TiO 2 [ 2 , 3 , 4 , 5 ], ZnO [ 6 , 7 , 8 ] and SnO 2 [ 9 , 10 , 11 , 12 ], have been widely reported. Among those, graphite-like phase carbon nitride (g-C 3 N 4 ), with inexpensive, physicochemical stability and suitable potentials, has been extensively used to degrade refractory organic contaminants and hydrogen production as new metal-free semiconductor photocatalysts [ 1 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. However, the low sunlight response caused by its intrinsic band gap (2.7 eV), and the strong recombination rate and low mobility of charge carrier have restricted the photocatalytic activity of single g-C 3 N 4 [ 16 , 17 , 18 ] seriously.…”

Section: Introductionmentioning

confidence: 99%

The Sono-Photocatalytic Performance of PAN/g-C3N4/CdS Nanofibers Heterojunction

et al. 2021

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The Polyacrylonitrile (PAN)/g-C3N4/CdS nanofiber sono-photocatalysts were successfully synthesized by an ordinary electrospining-chemical deposition method. The PAN/g-C3N4/CdS heterojunction nanofibers constructed with the CdS nanoparticles deposited on the PAN/g-C3N4 nanofibers. The g-C3N4/CdS heterojunction increase of light absorption and the construction of heterojunction can depress recombination of charge carrier and PAN nanofibers improve the recyclability successfully. Finally, a highly effective photocatalytic activity was performed by degradation of Rhodamine B (RhB) in visible light irradiation. Furthermore, an ultrasonic method is introduced into the sono-photocatalytic system to enhance the degradation efficiency of RhB ascribed to the synergistic effect of ultrasound.

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Fabrication of magnetically recyclable SnO2-TiO2/CoFe2O4 hollow core-shell photocatalyst: Improving photocatalytic efficiency under visible light irradiation

Cited by 29 publications

References 35 publications

Multifunctional Core‐Shell NiFe₂O₄ Shield with TiO₂/rGO Nanostructures for Biomedical and Environmental Applications

Multifunctional Core‐Shell NiFe₂O₄ Shield with TiO₂/rGO Nanostructures for Biomedical and Environmental Applications

From Core–Shell to Yolk–Shell: Improved Catalytic Performance toward CoFe₂O₄@ Hollow@ Mesoporous TiO₂ toward Selective Oxidation of Styrene

The Sono-Photocatalytic Performance of PAN/g-C3N4/CdS Nanofibers Heterojunction

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Fabrication of magnetically recyclable SnO2-TiO2/CoFe2O4 hollow core-shell photocatalyst: Improving photocatalytic efficiency under visible light irradiation

Cited by 29 publications

References 35 publications

Multifunctional Core‐Shell NiFe2O4 Shield with TiO2/rGO Nanostructures for Biomedical and Environmental Applications

Multifunctional Core‐Shell NiFe2O4 Shield with TiO2/rGO Nanostructures for Biomedical and Environmental Applications

From Core–Shell to Yolk–Shell: Improved Catalytic Performance toward CoFe2O4@ Hollow@ Mesoporous TiO2 toward Selective Oxidation of Styrene

The Sono-Photocatalytic Performance of PAN/g-C3N4/CdS Nanofibers Heterojunction

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Product

Resources

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Multifunctional Core‐Shell NiFe₂O₄ Shield with TiO₂/rGO Nanostructures for Biomedical and Environmental Applications

Multifunctional Core‐Shell NiFe₂O₄ Shield with TiO₂/rGO Nanostructures for Biomedical and Environmental Applications

From Core–Shell to Yolk–Shell: Improved Catalytic Performance toward CoFe₂O₄@ Hollow@ Mesoporous TiO₂ toward Selective Oxidation of Styrene