A Prussian blue analogue, K_0.84Co_1.08[Fe(CN)₆] is prepared by reaction between [Fe(CN)₆]^3- in aqueous solution and ion-exchanged Co²⁺ in the channels of MCM-41. Powder X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, nitrogen adsorption/desorption isotherms, diffuse reflectance UV-vis absorption spectroscopy and magnetic measurements were employed to characterize the product. The results show that the Prussian blue analogue is in nanoparticles within the channels and the hexagonal phase of MCM-41 remains intact during the reactions. A particle size effect on optical and magnetic properties of the nanoparticles was observed. © 2008 Elsevier Ltd. All rights reserved.

Vo V., Van Minh N., Lee H.I., Kim J.M., Kim Y., Kim S.J.

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Từ khóa : Atmospheric temperature; Cobalt; Cobalt compounds; Diffraction; Electromagnetic waves; Gravimetric analysis; Ion exchange; Magnetic properties; Microscopic examination; Modems; Nanoparticles; Nanostructured materials; Nanostructures; Solutions; Thermogravimetric analysis; Ultraviolet spectroscopy; Vanadium compounds; X ray analysis; X ray diffraction; X ray diffraction analysis; Zeolites; A. Nanostructures; Adsorption/desorption; Aqueous solutions; B. Magnetic properties; C. Thermogravimetric analysis; C. X-ray diffraction; Diffuse reflectances; Magnetic measurements; Optical-; Particle size effects; Prussian Blue analogues; Prussian blue nanoparticles; Synthesis and characterizations; Uv-vis absorptions; X-ray diffractions; Absorption spectroscopy