Mesoporous Fe3O4@Ag@TiO2 nanocomposite particles for magnetically recyclable photocatalysis and bactericide

Tseng, Wenjea J.; Chuang, Yi-Chen; Chen, Yuan

doi:10.1016/j.apt.2017.12.008

Cited by 33 publications

(16 citation statements)

References 38 publications

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“…The antibacterial activity of metal oxides and their hybrids, including TiO 2 and Fe 3 O 4 nanoparticles, has been the subject of much scientific research [ 82 , 83 , 84 ]. The creation of the structure TiO 2 /Fe 3 O 4 may enhance these properties, especially when activated by different forms of light [ 85 , 86 , 87 ]. Furthermore, the heterostructures TiO 2 /Fe 3 O 4 with other compounds (mostly gold or silver compounds) gave positive results in terms of antimicrobial growth action [ 88 , 89 ].…”

Section: Resultsmentioning

confidence: 99%

Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity

et al. 2020

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The TiO2-Fe3O4 composite materials were fabricated via the hydrothermal-assisted technique. It was determined how the molar ratio of TiO2 to Fe3O4 influences the crystalline structure and morphology of the synthesized composite materials. The effect of the molar ratio of components on the antibacterial activity was also analyzed. On the basis of XRD patterns for the obtained titanium(IV) oxide-iron(II, III) oxide composites, the two separate crystalline forms—anatase and magnetite —were observed. Transmission electron microscopy revealed particles of cubic and tetragonal shape for TiO2 and spherical for Fe3O4. The results of low-temperature nitrogen sorption analysis indicated that an increase in the iron(II, III) oxide content leads to a decrease in the BET surface area. Moreover, the superparamagnetic properties of titanium(IV) oxide-iron(II, III) oxide composites should be noted. An important aim of the work was to determine the antibacterial activity of selected TiO2-Fe3O4 materials. For this purpose, two representative strains of bacteria, the Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus, were used. The titanium(IV) oxide-iron(II, III) oxide composites demonstrated a large zone of growth inhibition for both Gram-positive and Gram-negative bacteria. Moreover, it was found that the analyzed materials can be reused as antibacterial agents in three consecutive cycles with good results.

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Section: Resultsmentioning

confidence: 99%

Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity

et al. 2020

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“…Finally, the mixture was transferred into a quartz tube and ultraviolet (UV) irradiated by a 150 W Hg lamp (λ = 365 nm) at the ambient temperature for several hours. At the end of the reaction, the as-synthesized nanoparticles were collected by a magnet, washed with distilled water and ethanol, and dried for 6 h at 70 °C [ 29 ].…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic and Antibacterial Properties of Ag-CuFe2O4@WO3 Magnetic Nanocomposite

2021

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This study aimed to synthesize a new magnetic photocatalytic nanosystem composed of Ag-CuFe2O4@WO3 and to investigate its photodegradation efficiency for two drug pollutants of Gemfibrozil (GEM) and Tamoxifen (TAM) under Ultraviolet (UV) light irradiation. In this regard, the effect of pH, catalyst dosage, and drug concentration was thoroughly determined. The largest photodegradation level for GEM (81%) and TAM (83%) was achieved at pH 5, a photocatalyst dosage of 0.2 g/L, drug concentration of 5 mg/L, and contact time of 150 min. The drug photodegradation process followed the pseudo first-order kinetic model. In addition to the photodegradation effect, the nanocomposites were proved to be efficient in terms of antibacterial activity, proportional to the Ag doping level. The Ag-CuFe2O4@WO3 nanocomposite exhibited a stable, efficient performance without an obvious catalytic loss after five successive cycles. Taken together, the developed magnetic photocatalyst is able to simultaneously disinfect wastewater streams and to degrade pharmaceutical contaminants and thus shows a promising potential for purification of multi-contaminant water systems.

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“…Dual cocatalyst modification was also investigated by Tseng et al 64 by preparing hierarchical Fe 3 O 4 @Ag@TiO 2 NCMs to impart simultaneous photodegradation functions. A core/shell structure with silver (Ag) particles is applied and the introduction of Ag can form positively charged silver ions in water, adsorbing bacteria on it to obtain sterilization properties.…”

Section: Carbonaceous Materials Modified Tio 2 Carbon (C)mentioning

confidence: 99%

Synthesis, modification and application of titanium dioxide nanoparticles: a review

Wang

et al. 2022

Nanoscale

137

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Mesoporous Fe3O4@Ag@TiO2 nanocomposite particles for magnetically recyclable photocatalysis and bactericide

Cited by 33 publications

References 38 publications

Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity

Hydrothermally Assisted Fabrication of TiO2-Fe3O4 Composite Materials and Their Antibacterial Activity

Photocatalytic and Antibacterial Properties of Ag-CuFe2O4@WO3 Magnetic Nanocomposite

Synthesis, modification and application of titanium dioxide nanoparticles: a review

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