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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

Pore size distribution for magnetite (a) and magnetite/chitosan composites (b) calculated by the BJH analysis method
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Fig3: Pore size distribution for magnetite (a) and magnetite/chitosan composites (b) calculated by the BJH analysis method

Mentions: The pore size and volume analysis was made using two models. The first model is based on the Barrett-Joyner-Halenda (BJH) method implemented in the firm software. The second one takes into account slit/cylindrical pores and voids between spherical particles with the self-consistent regularization (SCV/SCR) [41–44]. According to the calculations based on the BJH method (Fig. 3a, b), magnetite mesopores of 10-nm size prevail. In the case of magnetite/chitosan composites, it can be equal to magnetite.Fig. 3


Gd-DTPA Adsorption on Chitosan/Magnetite Nanocomposites.

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

Pore size distribution for magnetite (a) and magnetite/chitosan composites (b) calculated by the BJH analysis method
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig3: Pore size distribution for magnetite (a) and magnetite/chitosan composites (b) calculated by the BJH analysis method
Mentions: The pore size and volume analysis was made using two models. The first model is based on the Barrett-Joyner-Halenda (BJH) method implemented in the firm software. The second one takes into account slit/cylindrical pores and voids between spherical particles with the self-consistent regularization (SCV/SCR) [41–44]. According to the calculations based on the BJH method (Fig. 3a, b), magnetite mesopores of 10-nm size prevail. In the case of magnetite/chitosan composites, it can be equal to magnetite.Fig. 3

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