A kind of sea urchin-shaped single crystal selenium grown by three-dimensional cross growth and its preparation method

Abstract

The invention discloses three-dimensionally cross-growing urchin-like monocrystalline selenium. A preparation method of three-dimensionally cross-growing urchin-like monocrystalline selenium comprisesthe following steps: 1) dissolving PVP (polyvinylpyrrolidone) and a selenium source in deionized water respectively, then uniformly mixing the two solutions, adding a reducing agent L-ascorbic acid under the condition of magnetic stirring for a reaction at room temperature, and performing centrifugal washing to obtain precursor nano-selenium balls; 2) dispersing the obtained nano-selenium balls in a mixed solution of ethanol and water, leaving the mixture to stand for self-growing at normal temperature to obtain three-dimensionally cross-growing urchin-like monocrystalline selenium. Three-dimensionally cross-growing urchin-like monocrystalline selenium is proposed for the first time, and has a unique three-dimensional micro-nano structure; the process is simple, energy-saving and environmentally friendly, any hydrothermal or heating reactions are not needed, the reaction period is short, the yield is high, and the method has quite good application prospect in the fields of energy conversion, storage and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic nano functional materials, in particular to a three-dimensional cross-grown sea urchin-shaped single crystal selenium and a preparation method thereof. Background technique [0002] In 1818, the Swedish chemist Berzelius carefully studied the powder deposited in the lead chamber during the manufacture of sulfuric acid, and discovered a flammable elemental substance, named selenium. Elemental selenium is generally red or gray powder, and common bulk selenium is a metalloid with gray metallic luster. Among the six known allotropes, α monoclinic, β monotropic, and gray trigonal are the three most important crystals of selenium. Among the crystals of selenium, the gray hexagonal crystal system is the most stable, and there are also three amorphous solid forms: red and black, two kinds of amorphous glass-like selenium, and the other is colloidal selenium, and the trigonal system of selenium is compo...

AI Technical Summary

Problems solved by technology

However, the current literature reports on the morphology control of single crystal selenium only stay in zero-dimensional or one-dimensional materials, which cannot effectively broaden the application field of selenium and further improve its application effect.

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