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Gd-DTPA Adsorption on Chitosan/Magnetite Nanocomposites.

Pylypchuk IeV, Kołodyńska D, Kozioł M, Gorbyk PP - Nanoscale Res Lett (2016)

Bottom Line: Composites were prepared by co-precipitation of iron(II) and iron(III) salts by aqueous ammonia in the 0.1 % chitosan solution.It was shown that magnetite synthesis in the chitosan medium does not affect the magnetite crystal structure.The thermal analysis data showed 4.6 % of mass concentration of chitosan in the hybrid chitosan/magnetite composite.

View Article: PubMed Central - PubMed

Affiliation: Nanomaterials Department, Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164, Kyiv, Ukraine. chemind@ukr.net.

ABSTRACT
The synthesis of the chitosan/magnetite nanocomposites is presented. Composites were prepared by co-precipitation of iron(II) and iron(III) salts by aqueous ammonia in the 0.1 % chitosan solution. It was shown that magnetite synthesis in the chitosan medium does not affect the magnetite crystal structure. The thermal analysis data showed 4.6 % of mass concentration of chitosan in the hybrid chitosan/magnetite composite. In the concentration range of initial Gd-DTPA solution up to 0.4 mmol/L, addition of chitosan to magnetite increases the adsorption capacity and affinity to Gd-DTPA complex. The Langmuir and Freundlich adsorption models were applied to describe adsorption processes. Nanocomposites were characterized by scanning electron microscopy (SEM), differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and specific surface area determination (ASAP) methods.

No MeSH data available.


Related in: MedlinePlus

Scheme of chitosan/magnetite nanocomposite synthesis
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Fig1: Scheme of chitosan/magnetite nanocomposite synthesis

Mentions: Chitosan/magnetite nanocomposites were made by co-precipitation method. Chitosan solution was obtained by dissolving 0.5 g of chitosan (low Mw) in 50 cm3 of 1 % CH3COOH. The obtained solution was mixed with 0.5 L solution of Fe2+ and Fe3+ (24 g FeCl3·6H2O + FeSO4·2H2O) and left stirring overnight at 40 °C. The resulting solution was added dropwise to 150 mL of 25 % NH4OH solution in water (scheme in Fig. 1). The precipitate was collected by a permanent magnet and washed by doubly distilled water several times up to pH = 7. The obtained composite was dried in air at 60 °C. Ten grams of black powder was obtained.Fig. 1


Gd-DTPA Adsorption on Chitosan/Magnetite Nanocomposites.

Pylypchuk IeV, Kołodyńska D, Kozioł M, Gorbyk PP - Nanoscale Res Lett (2016)

Scheme of chitosan/magnetite nanocomposite synthesis
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4814391&req=5

Fig1: Scheme of chitosan/magnetite nanocomposite synthesis
Mentions: Chitosan/magnetite nanocomposites were made by co-precipitation method. Chitosan solution was obtained by dissolving 0.5 g of chitosan (low Mw) in 50 cm3 of 1 % CH3COOH. The obtained solution was mixed with 0.5 L solution of Fe2+ and Fe3+ (24 g FeCl3·6H2O + FeSO4·2H2O) and left stirring overnight at 40 °C. The resulting solution was added dropwise to 150 mL of 25 % NH4OH solution in water (scheme in Fig. 1). The precipitate was collected by a permanent magnet and washed by doubly distilled water several times up to pH = 7. The obtained composite was dried in air at 60 °C. Ten grams of black powder was obtained.Fig. 1

Bottom Line: Composites were prepared by co-precipitation of iron(II) and iron(III) salts by aqueous ammonia in the 0.1 % chitosan solution.It was shown that magnetite synthesis in the chitosan medium does not affect the magnetite crystal structure.The thermal analysis data showed 4.6 % of mass concentration of chitosan in the hybrid chitosan/magnetite composite.

View Article: PubMed Central - PubMed

Affiliation: Nanomaterials Department, Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164, Kyiv, Ukraine. chemind@ukr.net.

ABSTRACT
The synthesis of the chitosan/magnetite nanocomposites is presented. Composites were prepared by co-precipitation of iron(II) and iron(III) salts by aqueous ammonia in the 0.1 % chitosan solution. It was shown that magnetite synthesis in the chitosan medium does not affect the magnetite crystal structure. The thermal analysis data showed 4.6 % of mass concentration of chitosan in the hybrid chitosan/magnetite composite. In the concentration range of initial Gd-DTPA solution up to 0.4 mmol/L, addition of chitosan to magnetite increases the adsorption capacity and affinity to Gd-DTPA complex. The Langmuir and Freundlich adsorption models were applied to describe adsorption processes. Nanocomposites were characterized by scanning electron microscopy (SEM), differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and specific surface area determination (ASAP) methods.

No MeSH data available.


Related in: MedlinePlus