Preparation method of nano-fiber boehmite material

A technology of nanofibers and boehmite, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of complex multi-step reaction process, time-consuming, low crystallinity, etc., and achieve dispersion Good stability, short time consumption, and high crystallinity

Active Publication Date: 2014-02-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The hydrothermal method for the preparation of boehmite reported in the literature at present, such as (Xu Ronghui, Xiao Faxin, Wang Bin, etc. Experimental research on the synthesis of nanocrystalline boehmite by hydrothermal method. Guangzhou Chemical Industry, 6, 2011, 42-43) through hydration The hydrothermal reaction of aluminum chloride and sodium hydroxide can effectively prepare boehmite, but the crystallinity is low; while (Shi Tao, Guo Xingzhong, Yang Hui. Preparation and characterization of boehmite (γ-AlOOH) sol. Rare metal materials and Engineering, A02, 2008, 73-75) using aluminum isopropoxide as a precursor for hydrolysis reaction, and then preparing boehmite by hydrothermal method, this multi-step reaction process is complex and time-consuming

Method used

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  • Preparation method of nano-fiber boehmite material
  • Preparation method of nano-fiber boehmite material
  • Preparation method of nano-fiber boehmite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 1.795g of magnesium nitrate hexahydrate and 1.313g of aluminum nitrate nonahydrate into 50ml of deionized water, stir, and mix well.

[0023] (2) Add 1.717g of hexamethylenetetramine to the mixture and mix evenly, then measure 20ml of 99% formamide and slowly pour it into the mixture and stir for 5 minutes.

[0024] (3) Transfer the mixed solution to a 100ml reactor and seal it, add it to 140°C in an oven, and react for 24 hours. The reactant was suction-filtered and washed three times with deionized water, and the resultant was dried in an oven at 80° C. and ground to obtain a boehmite powder material.

Embodiment 2

[0026] Add 1.795g (0.007mol) of magnesium nitrate hexahydrate and 1.313g (0.0035mol) of aluminum nitrate nonahydrate into 50mL of deionized water, stir and mix well. Add 0.981g of hexamethylenetetramine to the mixed solution at a molar ratio of hexamethylenetetramine to aluminum nitrate of 2:1, and stir to mix evenly. Measure 30 mL of 99% formamide with a graduated cylinder, slowly add it to the mixed solution, and stir for 5 minutes with a magnetic stirring bar. After stirring evenly, transfer the mixed solution to a 100mL hydrothermal reaction kettle, and seal the reaction kettle. The reaction kettle was placed in an oven and heated to 145° C. for 20 hours. After the reaction, the product was suction filtered and washed three times with deionized water (approximately 250 mL of deionized water). After suction filtration, the resultant was placed in an oven and dried at 80°C. After drying, the resultant is ground to obtain a boehmite powder material.

Embodiment 3

[0028] Add 1.795g (0.007mol) of magnesium nitrate hexahydrate and 1.313g (0.0035mol) of aluminum nitrate nonahydrate into 50mL of deionized water, stir and mix well. Add 1.717g of hexamethylenetetramine to the mixed solution at a molar ratio of hexamethylenetetramine to aluminum nitrate of 3.5:1, and stir to mix evenly. Measure 20mL of N,N-dimethylformamide with a graduated cylinder, slowly add it into the mixed solution, and stir for 5 minutes with a magnetic stirring bar. After stirring evenly, transfer the mixed solution to a 100mL hydrothermal reaction kettle, and seal the reaction kettle. The reaction kettle was placed in an oven and heated to 125° C. for 24 hours. After the reaction, the product was suction filtered and washed three times with deionized water (approximately 250 mL of deionized water). After suction filtration, the resultant was placed in an oven and dried at 80°C. After drying, the resultant is ground into powder to obtain boehmite powder material.

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Abstract

The invention discloses a preparation method of a nano-fiber boehmite material. The nano-fiber boehmite material is synthesized by a one-step hydrothermal process. The preparation method comprises the following steps of adding a nitrate hydrate mixture of aluminum nitrate nonahydrate and magnesium nitrate hexahydrate into deionized water; adding hexamethylenetetramine and a surfactant; mixing and performing a hydrothermal reaction at 100-145 DEG C; filtering, washing and drying to obtain nano-fiber boehmite with controllable appearance and good dispersity. The preparation method has the characteristics of short time and simplicity and convenience, and the prepared boehmite is applicable to the fields such as water treatment filtering materials, precursors for preparing pure-aluminum and aluminum oxide materials, and the like.

Description

technical field [0001] The invention relates to a preparation method of a boehmite material, in particular to an improved hydrothermal preparation method of a nanofibrous boehmite material. Background technique [0002] Nowadays, human daily life and industrial production produce a large amount of wastewater every day. The bacteria, viruses, organic matter, heavy metals, acid-base salts and other substances contained in the wastewater will affect human health and pollute the environment. Boehmite is usually in a colloidal state and is inherently adsorptive. It produces a variety of hydrogen and oxygen active groups under different pH environments, and can effectively combine with harmful substances in wastewater. The boehmite crystals are very small and loosely arranged. In the industry, boehmite is usually used as a precursor for dehydration to prepare an efficient and environmentally friendly alumina filter material. The method is as follows: According to the filtration re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B82Y40/00B82Y30/00
Inventor 曾惠丹蒋奇余静芳贺铭章孙陆逸
Owner EAST CHINA UNIV OF SCI & TECH
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