Method for preparing hydrotalcite material adopting multi-shell hollow structure

Abstract

The invention discloses a method for preparing a hydrotalcite material adopting a multi-shell hollow structure. The method comprises the following steps: firstly, preparing a metal organic framework material (MOF-1), epitaxially growing to obtain MOF-1@MOF-2, and then etching by a sacrificial template method to obtain single-layer hollow hydrotalcite (LDH); with MOF as a seed crystal, epitaxiallygrowing to obtain MOF-1@MOF-2@MOF-1@MOF-2, and then etching by the sacrificial template method to obtain double-layer hollow LDH; repeating the epitaxially growing step to obtain multi-shell MOF, andfinally etching to obtain the LDH adopting the multi-shell hollow structure. The method is simple, easy to implement, mild in condition and high in safety; by the method, the multi-shell hollow LDH can be obtained; the method has a wide application prospect.

Description

technical field

[0001] The invention belongs to the technical field of hydrotalcite materials, in particular to a method for preparing a multi-shell hollow structure hydrotalcite material. Background technique

[0002] Hydrotalcite (Layered Double Hydroxide, LDH) is a compound composed of positively charged host laminates and interlayer anions through non-covalent interactions. LDH has the following outstanding features: (1) The chemical composition of the host layer can be adjusted; (2) The type and quantity of the interlayer guest anion can be adjusted; (3) The particle size and size of the intercalation assembly Distribution can be adjusted. Hydrotalcite and its modified hydrotalcite-like have broad application prospects in many fields such as ion exchange, adsorption, conduction, separation, medicine and catalysis.

[0003] Nanomaterials with hollow structures have the characteristics of high specific surface area and low density, and have become a research hotspot in ...

Examples

Embodiment 1

[0021] 1) Synthesis of metal organic framework ZIF-67:

[0022] Cobalt nitrate hexahydrate (1.4552g) and dimethylimidazole (3.284g) were added to 100 milliliters of anhydrous methanol respectively. After cobalt nitrate hexahydrate was stirred and dissolved, they were added to the methanol solution of dimethylimidazole and continued to stir for about 10 minutes, then reacted at room temperature for 12 hours, centrifuged the obtained purple product, washed three times with methanol, and dispersed in 20 ml of methanol;

[0023] 2) Preparation of metal-organic framework ZIF-67@ZIF-8 by epitaxial growth method

[0024] Zinc nitrate hexahydrate (0.3719g) and dimethylimidazole (0.8210g) were added to 100 ml of anhydrous methanol respectively, and the metal organic framework ZIF-67 was added to the methanol solution of dimethylimidazole, and stirred for about 30 Minutes, then add the methanol solution of zinc nitrate hexahydrate to the above solution, continue stirring for about 10 m...

technical field

[0001] The invention belongs to the technical field of hydrotalcite materials, in particular to a method for preparing a multi-shell hollow structure hydrotalcite material. Background technique

[0002] Hydrotalcite (Layered Double Hydroxide, LDH) is a compound composed of positively charged host laminates and interlayer anions through non-covalent interactions. LDH has the following outstanding features: (1) The chemical composition of the host layer can be adjusted; (2) The type and quantity of the interlayer guest anion can be adjusted; (3) The particle size and size of the intercalation assembly Distribution can be adjusted. Hydrotalcite and its modified hydrotalcite-like have broad application prospects in many fields such as ion exchange, adsorption, conduction, separation, medicine and catalysis.

[0003] Nanomaterials with hollow structures have the characteristics of high specific surface area and low density, and have become a research hotspot in ...

Examples

Embodiment 1

[0021] 1) Synthesis of metal organic framework ZIF-67:

[0022] Cobalt nitrate hexahydrate (1.4552g) and dimethylimidazole (3.284g) were added to 100 milliliters of anhydrous methanol respectively. After cobalt nitrate hexahydrate was stirred and dissolved, they were added to the methanol solution of dimethylimidazole and continued to stir for about 10 minutes, then reacted at room temperature for 12 hours, centrifuged the obtained purple product, washed three times with methanol, and dispersed in 20 ml of methanol;

[0023] 2) Preparation of metal-organic framework ZIF-67@ZIF-8 by epitaxial growth method

[0024] Zinc nitrate hexahydrate (0.3719g) and dimethylimidazole (0.8210g) were added to 100 ml of anhydrous methanol respectively, and the metal organic framework ZIF-67 was added to the methanol solution of dimethylimidazole, and stirred for about 30 Minutes, then add the methanol solution of zinc nitrate hexahydrate to the above solution, continue stirring for about 10 m...

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