Semiconductor antimony sulfide nanocrystalline and preparing method thereof and photocatalysis hydrogen production performance testing method

Abstract

The invention belongs to the technical field of semiconductor antimony sulfide (Sb2S3) nanocrystalline and a photocatalysis hydrogen production performance testing method. The chemical formula of semiconductor antimony sulfide is Sb2S3, the molecular weight is 339.68, the structure is an orthorhombic crystal system, and the space group number is Pcmn (62); the crystal particle is in an irregular spherical shape, the crystal particle distribution is narrow, and the crystal particle is 6.5nm-11.5 nm, the average size obtained after Gaussian fitting is 8.67 nm, the chemical component is relatively uniform, the structure is single, the surface is pure, and the direct band-gap value of semiconductor antimony sulfide nanocrystalline is about 1.74eV. The semiconductor antimony sulfide nanocrystalline and the preparing method thereof and the photocatalysis hydrogen production performance testing method have the advantages that the adopted amorphous metal alloy method is a physical compounding method, and compared with a chemical preparing method, has the advantages of being easy to operate, low in equipment price and free of pollution to environment, and semiconductor antimony sulfide nanocrystalline is easy to produce in large scale and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer photocatalysis and relates to semiconductor antimony sulfide (Sb 2 S 3 ) nanocrystals, a preparation method thereof, and a test method for photocatalytic hydrogen production performance. Background technique [0002] A photocatalyst is a substance that does not change itself under the irradiation of light, but can promote chemical reactions. The basic principle of photocatalytic hydrogen production is that the photocatalyst material absorbs the energy of light radiation, and the excited electrons transition from the valence band to the conduction band to become conduction band electrons, and at the same time, a corresponding number of holes are formed on the valence band to obtain electron-hole pairs. , and then part of the photogenerated electrons formed moves to the surface of the material to reduce the protons or water molecules adsorbed on the surface of the material to obtain hydrogen. T...

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Problems solved by technology

At present, although there are many literatures reporting the synthesis of antimony sulfide nanocrystals, and great progress has been made in this field, the literature reports on the synthesis methods that can effectively control the composition and morphology of antimony sulfide nanocrystals are not yet available. Many, people still need to explore more simple and efficient synthetic methods

Most of the reported methods such as chemical vapor deposition, vacuum evaporation, chemical bath, vulcanization and other chemical synthesis methods all need to be under suitable external conditions (including temperature, pressure, gas atmosphere, etc.), the amount of synthesis is small, and the energy The consumption is high, and some methods require the preparation of precursors, which is troublesome to operate. At the same time, the surface of the prepared sample is covered with impurities such as organic matter, which has a certain impact on the intrinsic physical properties of the material.

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