A method for controlling the grain growth process of nano-layered mgFe hydrotalcite

A grain growth, nano-layered technology, applied in nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of large crystal size of hydrotalcite and the inability to control the crystal size effectively, and achieves inhibition of aggregate growth, control The effect of preparation cost
CN107879377BInactive Publication Date: 2019-10-25NORTHEAST GASOLINEEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEAST GASOLINEEUM UNIV
Publication Date
2019-10-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a method for controlling the growth process of nano-layered MgFe hydrotalcite grains. The method for controlling the growth process of nano-layered MgFe hydrotalcite grains: (1) preparing Mg(NO 3 ) 2 solution, Fe(NO 3 ) 3 Solution, mix evenly, so that the Mg / Fe molar ratio in the solution is 1:10‑10:1; (2) Add NaOH precipitant dropwise to the solution prepared in step (1), and stir continuously, so that the pH of the solution is 8 -12; (3) Crystallize at 140°C-220°C for 0.5h-6h, then continue to crystallize at 70°C-120°C for 12h-36h, the amount of organic steric hindrance added in the hydrothermal synthesis system is the total mass of the solution 0.1%-20.0%, after the reaction, the solid product is isolated, washed and separated, and the obtained solid product is dried to obtain nano-sized layered MgFe hydrotalcite. The invention can prepare MgFe hydrotalcite with nanometer size and narrow crystal size distribution range.
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Description

technical field

[0001] The invention relates to a method for regulating the grain growth process of hydrotalcite, in particular to a method for regulating the grain growth process of nano-layered MgFe hydrotalcite. Background technique

[0002] Hydrotalcite and hydrotalcite-like compounds, also known as layered double hydroxides (LDHs), are anionic compounds with a layered structure. Hydrotalcite crystals are hexagonal, and its structure is similar to brucite Mg(OH) 2 , the structural unit of brucite is MgO 6 octahedral, where the oxygen is OH - form exists. Hydrotalcite can be seen as the 2+ Al similar 3+ Substituting it into the derivatives of brucite formed in the octahedral structure, due to Al 3+ In order to balance the excess charge on the laminate, the anion enters the hydrotalcite layer, making the hydrotalcite system electrically neutral. Hydrotalcite is a class of tunable inorganic functional materials, and laminate cations can be combined with Mg 2+ Ions w...

Claims

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