Oxygen-doping bundle type porous boron nitride preparation method

Abstract

The invention provides an oxygen-doping bundle type porous boron nitride preparation method which comprises the steps of adding a certain proportion of boric acid and melamine mixture into a mixed solution of water and ethyl alcohol; fully dissolving the mixed solution into a water bath at 80 to 100 DEG C, keeping the temperature, and evaporating the water and the ethyl alcohol; after recrystallizing the mixture, pouring liquid nitrogen into the recrystallized product, cooling, then freeze-drying an obtained white massive precipitate, and obtaining a bundle type precursor containing boron, nitrogen and oxygen; placing the precursor into a high temperature furnace, then carrying out pyrolytic reaction under a nitrogen atmosphere, and obtaining an oxygen-doping bundle type porous boron nitride material. The oxygen-doping bundle type porous boron nitride material prepared through the preparation method provided by the invention is large in specific surface area, uniform in porosity, non-toxic and cheap in used raw materials, simple in synthesis process, low in preparation cost, large in output, and capable of effectively adsorbing multiple heavy metal ions in a solution, and has a favorable application prospect in the field of heavy metal processing.

Description

technical field [0001] The invention belongs to the field of material technology, in particular to a preparation method of boron nitride material. Background technique [0002] Boron nitride is a synthetic compound composed of the third group (III) element boron (B) and the fifth group (V) element nitrogen (N). Its structure is similar to graphite, known as "white graphite". . Boron nitride has good oxidation resistance, thermal stability, acid and alkali corrosion resistance and good chemical inertness. It has been widely concerned by researchers for a long time, so it has good application prospects in many fields. [0003] In recent years, with the synthesis of porous boron nitride materials with large specific surface area, the research on the preparation of porous boron nitride materials and their use as adsorbents at home and abroad has achieved considerable development and progress. Researchers have found that boron nitride It is prepared into a porous structure and ...

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Problems solved by technology

Although the above method has successfully prepared porous boron nitride, there are still some problems to be solved in the preparation process, such as effectively reducing the preparation cost, increasing the yield, controlling the pore structure, etc.

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