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Novel Prussian blue mesocrystals and preparation method thereof

A blue mesogen, a new type of technology, applied in the direction of cyanic acid/isocyanic acid, etc., can solve the problem of not being widely promoted, and achieve the effect of convenient and easy operation, easy control and simple equipment in the process.

Inactive Publication Date: 2010-05-12
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, limited by the existing synthesis conditions, known mesogens are concentrated in simple salts such as carbonates and sulfates, and have not been widely promoted.

Method used

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  • Novel Prussian blue mesocrystals and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh a certain mass of solid K 4 [Fe(CN) 6 ]·3H 2 O is dissolved in deionized water, and a certain amount of hydrochloric acid is added to prepare an acidic mixed solution of potassium ferrocyanide with a certain concentration. Among them, K 4 [Fe(CN) 6 ] The molar concentration is 0.032mol / L, and the HCl molar concentration is 2mol / L. Transfer the mixed solution into a polytetrafluoroethylene-lined autoclave, raise the temperature to 120°C and keep it warm for 24 hours. Allow to cool naturally to room temperature, at which point the blue particles are deposited on the bottom of the Teflon liner. The product was washed several times with deionized water and absolute ethanol, centrifuged, and dried in a vacuum oven at 50° C. for 10 hours to obtain a blue powdery product. The product is an octahedral Prussian blue mesogen.

Embodiment 2

[0027] Weigh a certain mass of solid K 4 [Fe(CN) 6 ]·3H 2 0 is dissolved in deionized water, and a certain amount of hydrochloric acid is added to prepare an acidic mixed solution of potassium ferrocyanide with a certain concentration. where K 4 [Fe(CN) 6 ] The molar concentration is 0.016mol / L, and the HCl molar concentration is 2mol / L. Transfer the mixed solution into a polytetrafluoroethylene-lined autoclave, raise the temperature to 120°C and keep it warm for 24 hours. Allow to cool naturally to room temperature, at which point the blue particles are deposited on the bottom of the Teflon liner. The product was washed several times with deionized water and absolute ethanol, centrifuged, and dried in a vacuum oven at 50° C. for 10 hours to obtain a blue powdery product. The product is an octahedral Prussian blue single crystal.

Embodiment 3

[0029] Weigh a certain mass of solid K 4 [Fe(CN) 6 ]·3H 2 O is dissolved in deionized water, and a certain amount of hydrochloric acid is added to prepare an acidic mixed solution of potassium ferrocyanide with a certain concentration. where K 4 [Fe(CN) 6 ] The molar concentration is 0.1mol / L, and the molar concentration of HCl is 2mol / L. Transfer the mixed solution into a polytetrafluoroethylene-lined autoclave, raise the temperature to 120°C and keep it warm for 24 hours. Allow to cool naturally to room temperature, at which point the blue particles are deposited on the bottom of the Teflon liner. The product was washed several times with deionized water and absolute ethanol, centrifuged, and dried in a vacuum oven at 50° C. for 10 hours to obtain a blue powdery product. The product is an octahedral Prussian blue mesogen.

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PUM

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Abstract

The invention discloses novel Prussian blue mesocrystals and a preparation method thereof, and belongs to the technical field of the preparation of inorganic materials. The Prussian blue mesocrystals with novel hierarchical self-assembly structures are prepared by mixing ferrocyanide salt serving as a raw material with inorganic acid at a specific concentration through hydro-thermal treatment. The prepared integral mesomorphous particles are in shapes of scobinate octahedrons, similar octahedrons, similar spheroids and great lake rocks and consist of numerous small-scale crystals, and all the small-scale crystals are nanorods and nanocubes of between 150 and 250 nm. The Prussian blue mesocrystals can be applied in the field of catalysis due to larger specific surface areas and a mass of pore spaces; and the invention has the advantages of novel morphology of product particles, low cost, simple equipment, easy operation and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to a novel Prussian blue mesocrystal and a preparation method thereof. Background technique [0002] Mesocrystal is a kind of complex crystal whose shape is complex like polycrystal, but whose diffraction behavior is similar to single crystal. Compared with the usual single crystal and polycrystalline structures, mesogens have unique properties. It has both the long-range symmetry of single crystals and the complex and diverse morphology of polycrystals, and has become a new type of crystal material with potential application value. Mesogens are commonly found in nature, and many biominerals have a mesogenic structure. Synthetic mesogen materials are inspired by natural mesogen minerals, and are usually synthesized by biomimetic pathways. The method is limited to organic templates and requires mild temperature and pH. The development of mesogenic synthes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C3/14
Inventor 姜继森胡鸣姬瑞平
Owner EAST CHINA NORMAL UNIV
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