Preparation method of porous boron nitride foam material for water purification

A foam material and boron nitride technology, applied in chemical instruments and methods, applications, water pollutants, etc., can solve the problems of low stability of activated carbon, poor regeneration ability, etc., to overcome poor adsorption capacity, reduce consumption of raw materials, The effect of excellent regeneration and reuse ability

CN109265178AInactive Publication Date: 2019-01-25HUBEI UNIV OF EDUCATION
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-01-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a porous boron nitride foam material for water purification and a water purification material. The preparation method comprises the following steps: uniformly dispersing boric acid in an amines organic compound, and preparing a precursor of the porous boron nitride foam material through a boiling reflux method under the protection of an inert gas; carrying out high-temperature thermal cracking on the obtained precursor under protective atmosphere, thus obtaining the porous boron nitride foam material for the water purification. The porous foam structure of a product obtained in the invention is formed by stacking boron nitride nanosheets, the adsorption capacity to organic pollutants in water at the normal temperature is up to 900 mg / g, the adsorption capacity to heavy metal ions in the water is up to 500 mg / g, the removing ability of the pollutants in a water solution is kept be 87 percent or above after the porous boron nitride foam material is repeatedly used by 60 times, and the defects of poor absorption ability, low reuse efficiency and the like of a traditional adsorption material-activated carbon are overcome. No any adhesiveis added in the porous boron nitride foam material obtained in the invention, materials are saved, and large-scale production is easy.
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Description

technical field

[0001] The technical solution of the invention relates to boron nitride materials, in particular to a method for preparing porous boron nitride foam materials used for water purification. Background technique

[0002] With the development of social economy and industrialization, the problem of environmental pollution has attracted more and more attention. A large number of industrial enterprises such as dye factories, electroplating factories and printing factories discharge highly polluting waste liquids containing organic pollution and heavy metal ions. This kind of pollution The pollutants not only pollute the environment and harm people's health, but also aggravate the color in the aqueous solution and seriously affect the ecological environment of the water body. Due to the simple operation, high efficiency and low operating cost of the adsorption process, the adsorption method is considered to be one of the most practical methods among many traditional ...

Examples

Embodiment 1

[0025] (1) Add 1 gram of boric acid into a container containing 1 liter of ethylamine, stir for 0.1 hour, then put the mixed solution into the container of the ultrasonic instrument, keep the water temperature in the container at 75°C, and the ultrasonic power at 5HKz , the ultrasonic time is 0.5 hours; (2) move the obtained product into a reactor with a reflux device, pass through an inert gas protection, and heat to 250 ° C, and keep it warm for 0.5 hours; (3) The obtained product in (2) The product of the product is placed in a reaction vessel, and the ammonia gas with a flow rate of 10 ml / min is fed into it, and the temperature rises to 900 °C at a heating rate of 2 °C / min, and is kept warm for 1 hour. When the temperature is lowered to room temperature, a porous boron nitride foam material for water purification is obtained.

[0026] The porous boron nitride foam material obtained in the above-mentioned embodiment 1 is a foam block structure ( figure 1 ); powder X-ray di...

Embodiment 2、3

[0028] Change step (1) amine organic matter in embodiment 1 into diethylamine and ethylenediamine respectively, and other operations are all the same as in embodiment 1, and the product obtained is the same as in embodiment 1.

Embodiment 4、5

[0030] Change the consumption of step (1) amine organic matter into 20 grams, 50 grams respectively in the embodiment 1, other each operation is all the same with embodiment 1, obtains the product with embodiment 1.