Multifunctional Fe3O4@C@Ag hybrid nanoparticles: Aqueous solution preparation, characterization and photocatalytic activity

Microbial contamination poses a serious threat to human health. The evaluation of alternative systems and their reliability for the treatment of water is essential. In this work, a new method for the deposit of more silver nanoparticles (AgNPs) on the external surface of Fe 3 O 4 nanoparticles is presented. Fe 3 O 4 nanoparticles were synthesised by chemical co-precipitation and were modified in two stages using 3-mercaptopropyl trimethoxysilane and grafting allyl glycidyl ether and N, N-dimethylacrylamide. Then, AgNPs were loaded onto the modified Fe 3 O 4 to be used for water disinfection. The resulting nanoparticles were characterised by transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometer and thermal gravimetric analysis. Batch experiments were performed to investigate the effects of parameters such as amount of Fe 3 O 4 − Ag, contact time, and initial concentrations of MPN (the most probable number) and pH. The kinetic data was analysed by pseudo-first-order and pseudo-second-order equations. Results showed that the optimum conditions were a contact time of 30 min (94%), 50 mg of Fe 3 O 4 − Ag, and a pH was 6.5 for the maximum MPN removal efficiency (99.76%) in 750 cfu/ml MPN. On the basis of the results of fitting data, the pseudo-second-order kinetic model was selected as suitable for the data.

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“…The results of this study showed that in the absence of

normalSi O_{2}

, contact time decreased to 30 min. Liang et al [24] found that maximum degradation of dyes using

normalF e_{3} O_{4}

–C–Ag was obtained after 30 min.…”

Section: Resultsmentioning

confidence: 99%

Performance of silver nanoparticle fixed on magnetic iron nanoparticles () in water disinfection

Sharifi

Hassani

Panahi

et al. 2018

Micro & Nano Letters

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“…On the other hand, silver-coated magnetic nanocomposites are considered as promising multifunctional materials as well because they have unique antibacterial characteristics [ 139 , 140 , 141 , 142 ]. However, hybrid Fe 3 O 4 @C@Ag are the dominant class of nanocomposites owing to their widespread applications in different research areas [ 143 , 144 , 145 ]. Xia et al synthesized Fe 3 O 4 @C@Ag nanocomposites and concluded that by introducing a carbon layer, their synthesized nanocomposites have better antibacterial activity compared to Fe 3 O 4 @Ag.…”

Section: Surface Modification Of Magnetic Iron Oxide Nanoparticlesmentioning

confidence: 99%

Surface Modification of Magnetic Iron Oxide Nanoparticles

et al. 2018

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Functionalized iron oxide nanoparticles (IONPs) are of great interest due to wide range applications, especially in nanomedicine. However, they face challenges preventing their further applications such as rapid agglomeration, oxidation, etc. Appropriate surface modification of IONPs can conquer these barriers with improved physicochemical properties. This review summarizes recent advances in the surface modification of IONPs with small organic molecules, polymers and inorganic materials. The preparation methods, mechanisms and applications of surface-modified IONPs with different materials are discussed. Finally, the technical barriers of IONPs and their limitations in practical applications are pointed out, and the development trends and prospects are discussed.

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“…In this way, it is possible to combine the optical properties of a noble metal, like silver or gold, and the high magnetization and superparamagnetic properties associated with the iron ferrite nanoparticles. These heterodimer nanoparticles, sometimes called Janus nanoparticles, have enormous potential for biomedical application such as hyperthermia treatment, magnetic resonance imaging contrast agents, and magnetic separation, among others , They can also be used in technological applications, taking advantage of the incorporation of the metal ions into iron oxide nanoparticles, for example, in switch contacts, welding, and catalysis, among others.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Studies of Complex Silver–Magnetite Nanoheterodimers with Controlled Morphology

et al. 2014

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This work discusses the influence of synthesis conditions on self-assembly capability and morphology of obtained Ag–Fe3O4 nanoheterostructures. Samples were synthesized in two steps: first silver nanoparticles were synthesized and then used as seeds for the growth of iron oxide nanoparticles in a second step. The silver nanoparticle size was tuned, changing the oleylamine (OAm) and oleic acid (OA) ratio, which enables us to study the influence of chemical agents and seed size on the final magnetic nanoparticle morphology. The mechanism during the formation of these heterostructures has been discussed by several authors; however, it remains an open issue. In this paper we extend the discussion and advance on the understanding of synthesis conditions, related to silver sizes, chemical agents, and physical properties on the obtained nanoparticles. In our Ag–Fe3O4 system, two types of heterostructures were obtained: dimer, flower, or combination of the two. We have found that the final shape depends on silver seed size, as well as the polarity of the chemical agents used during the synthesis. We made an exhaustive study of the relationship between magnetic properties and structural features. The morphology and size distributions of the heterostructures were analyzed with transmission electron microscopy (TEM).

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Multifunctional Fe3O4@C@Ag hybrid nanoparticles: Aqueous solution preparation, characterization and photocatalytic activity

Cited by 32 publications

References 33 publications

Performance of silver nanoparticle fixed on magnetic iron nanoparticles () in water disinfection

Performance of silver nanoparticle fixed on magnetic iron nanoparticles () in water disinfection

Surface Modification of Magnetic Iron Oxide Nanoparticles

Physicochemical Studies of Complex Silver–Magnetite Nanoheterodimers with Controlled Morphology

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