Effect of synthetic conditions on the crystallinity, porosity and magnetic properties of gluconic acid capped iron oxide nanoparticles

Amos-Tautua, Bamidele; Fakayode, Olayemi J.; Songca, Sandile P.; Oluwafemi, Oluwatobi S.

doi:10.1016/j.nanoso.2020.100480

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…Moreover, their S Micro and V Micro values were close to zero, suggesting that the porosity of these samples is not given by the micropores, but mostly by the mesopores formed by the aggregates inside the samples. The materials with different percentage of Zn (from 1% to 10%) had mostly the same mesoporous structures, expressed by the similarities in S Meso , V Meso and d Mean pores, as seen in the literature [39,40]. However, the results of Fe 3 O 4 indicated that the pristine material had a higher mesopore volume, which was composed of larger amounts of mesopores compared to the materials doped with Zn.…”

Section: Bet Analysissupporting

confidence: 57%

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

et al. 2022

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In this work, we present magnetic nanoparticles based on iron oxide doped with zinc synthesized using the wet co-precipitation method for environmental application. The morphology of the samples was revealed by SEM and TEM, which showed particles of granular shape and size of about 15 nm. The specific surface areas of the materials using the BET method were within the range of 85.7 to 101.5 m2 g−1 depending on the zinc content in the superparamagnetic iron oxide nanoparticles (SPIONs). Magnetometry was performed to determine the magnetic properties of the particles, indicating superparamagnetism. Synthesized magnetic nanoparticles with different amounts of zinc dopant were used as an adsorbent to remove model pollutant Titan yellow (TY) from the aqueous solutions. Adsorption was determined by investigating the effects of sorbent amount, dye concentration, and contact time. The synthesized material removed Titan yellow quickly and efficiently within the physical adsorption. The adsorption isotherms were consistent with the models proposed by Langmuir and Redlich-Peterson. The monolayer adsorption capacities were 30 and 43 mg g−1 for Fe3O4 and Fe3O4@10%Zn, respectively, for the removal of TY. However, that of Congo red is 59 mg g−1 by Fe3O4@10%Zn. The proposed nanoparticles offer fast and cost-effective water purification, and they can be separated from solution using magnets.

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Section: Bet Analysissupporting

confidence: 57%

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

et al. 2022

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“…The synthesis of uncoated gluconic acid capped SPION has been reported in our previous work. ( Amos-Tautua et al 2020). Briefly, a solution of glucose was added to a solution of Fe (III) chloride in water to regulate the proportion of Fe (III) ion and Fe (II) ions in a 1 to 2 ratio.…”

Section: Preparation Of Gold-coated Superparamagnetic Iron-oxide Nano...mentioning

confidence: 99%

“…The estimated surface area and maximum pore diameter of SPION@Au were 134.02 m²/g and 3.33 nm respectively which are slightly lower than those of SPION with the surface area and pore diameter of 165.56 m²/g and 3.37 nm respectively. These noteworthy textural properties of the assynthesized nanoparticles could play a significant role in physisorption and in environmental remediation of heavy metals pollution (Amos-Tautua et al 2020;Getahun et al 2022).…”

Section: Textural Propertiesmentioning

confidence: 99%

Textural Thermo-gravimetric and Magnetic Properties of Green Synthesised Water Dispersible Pristine and Gold Coated Superparamagnetic Iron Oxide Nanoparticles

Amos-Tautua¹,

Markmanuel²,

Songca³

et al. 2022

JMESR

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Gold-coated magnetic nanoparticles have received a lot of attention in recent years due to their multifunctional attributes and their prospective unique characteristics in environmental and biomedical applications. This paper reports the textural, thermo-gravimetric, and magnetic properties of green synthesized gluconic acid-capped uncoated and gold-coated superparamagnetic iron oxide nanoparticles (SPION@Au). The as-synthesized nanomaterials were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), thermal gravimetric analysis (TGA), Brunauer–Emmett–Teller (BET), and superconducting quantum interference device (SQUID) magnetometry. The XRD and SEM measurements showed that the gluconic acid-capped magnetic core was coated with gold with cubical spinel crystalline structures. TGA results revealed the thermal stability of the nanoparticles. Textural properties indicated that the gold-coated nanoparticles were in naturally mesoporous and exhibited the type IV isotherm with an H2 hysteresis loop. The estimated maximum pore diameter and surface area of SPION@Au were 3.33 nm and 134.02 m²/g respectively. Furthermore, the SQUID results showed the nanocrystals were superparamagnetic with a blocking temperature (TB) of 214 K at 500 Oe and saturation magnetization of 11.38 emu/g. These noteworthy results demonstrated that the as-synthesized SPION@Au are promising nanomaterials for biomedical and analytical applications.

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“…Examples of distinctive single magnetic nanoparticles detailing their composition, structure, surface area, method for synthesis, contaminant examined and proposed method of removal The control of the surface properties is highly important for the utilization of superparamagnetic iron oxide nanoparticles (SPIONs) (average size, 15 nm) in water remediation among other applications. In a report by Oluwatobi et al [51] various forms of SPION were made using glucose as a stabilizing agent. Through variations in the synthesis control of nanoparticle crystallinity, porosity, and magnetic properties can be achieved.…”

Section: Single Magnetic Nanoparticle Materialsmentioning

confidence: 99%

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Govan

2020

Magnetochemistry

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Water resources are of extreme importance for both human society and the environment. However, human activity has increasingly resulted in the contamination of these resources with a wide range of materials that can prevent their use. Nanomaterials provide a possible means to reduce this contamination, but their removal from water after use may be difficult. The addition of a magnetic character to nanomaterials makes their retrieval after use much easier. The following review comprises a short survey of the most recent reports in this field. It comprises five sections, an introduction into the theme, reports on single magnetic nanoparticles, magnetic nanocomposites containing two of more nanomaterials, magnetic nanocomposites containing material of a biologic origin and finally, observations about the reported research with a view to future developments. This review should provide a snapshot of developments in what is a vibrant and fast-moving area of research.

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Effect of synthetic conditions on the crystallinity, porosity and magnetic properties of gluconic acid capped iron oxide nanoparticles

Cited by 8 publications

References 34 publications

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

Titan Yellow and Congo Red Removal with Superparamagnetic Iron-Oxide-Based Nanoparticles Doped with Zinc

Textural Thermo-gravimetric and Magnetic Properties of Green Synthesised Water Dispersible Pristine and Gold Coated Superparamagnetic Iron Oxide Nanoparticles

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

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