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Graphene boosts the photocatalytic rate of zinc sulfide

2019-03-22
Water pollution is a major problem facing the whole world
A type of ii-iv periodic semi-conductive material, zinc sulfide can be produced under light
The production of a large number of photogenic electron-holes shows potential in the water treatment industry
.Nowadays, people often use small size to achieve
To improve the photocatalytic efficiency of zinc sulfide.Wu et al.  prepared at room temperature
The zinc sulfide pellets of 500nm size were completely degraded in water after 60min
Rhodamine B.Muruganandham et al.  prepared by hydrothermal method
Hollow zinc sulfide pellets composed of 10nm particles can reduce organic pollutants
The efficiency of the system was further reduced to 30min.However, the nano - structure photocatalysis
Although the photocatalytic performance of the materials has been improved to a certain extent, the increase of specific surface area of the nanostructure makes it easier for the particles to cluster together
On the other hand, the ZNS nanostructure itself conducts electricity
Poor performance, adverse to photogenic carrier fast transfer, resulting in photogenic electrons
A large amount of accumulation leads to photocorrosion reaction of metallic sulfide.For the
The problem of agglomeration and photoerosion of zinc sulfide was resolved and further increases were made
In recent years, people have turned their attention to zinc sulfide with excellent yield
Research on the composite of conductive and porous carbon materials .graphene
A two - dimensional planar carbon material with a high specific surface area
Good electrical conductivity is very important in catalytic field
Use .For example, the two-dimensional planar structure of graphene can act as a catalyst
The bearing base of the material is uniformly distributed with the active substance to prevent its mass
Poly ;Graphene has excellent electrical conductivity and can effectively induce photocatalysis
Photoelectricity in particles can effectively prevent the combination of photoelectricity and cavitation.
Increase the quantum yield and reduce the photoetching reaction .At the same time, graphene
Materials made from high specific surfaces as well as common yoke - PI keys, to color
Dye has a certain adsorption energy, can be used to add accelerant surrounding dye
The concentration of the.The new graphene-based composite materials will be able to greatly improve
Its catalytic efficiency and resistance to light corrosion.But it's due to zinc sulfide
The band gap of the body is 3.Seven ev, the absorption spectrum is in the ultraviolet region, and violet
External light accounted for only 4% of the solar light left and right, which severely restricted the zinc sulfide in
Practical applications in the field of photocatalysis.For this reason, how to make zinc sulfide in can
High photocatalytic performance is one of the problems to be solved
Question .Recently, researchers have found that by means of dissociative transmutation reflexives
The heterojunction of zinc sulfide and copper sulfide can be formed under visible light irradiation
The phenomenon of electron transfer at the interface (that is, the electrons in the zinc sulfide valence band pass through the boundary)
The surface is transferred into the copper ion cluster) .The heterogeneity of interfacial electron transfer occurs
In the junction, the electrons in the copper cluster can effectively reduce the oxygen gas to form superoxygen
Free radicals, the holes in the zinc sulfide valence band can oxidize hydroxide to form hydroxyl
The radical, that is, the electron transport across the interface, the copper ion
The internal electron showed good reducing force, and the cavitation surface in zinc sulfide
It shows good oxygenation ability.Thus forming zinc sulfide/copper sulfide heterogeneity
It is an effective method to solve zinc sulfide's low utilization of visible light.
In this work, the graphene negative was prepared by microwave assisted heating
Stone ink was obtained by carrying zinc sulfide nanoparticles through ion exchange reaction
Alkene-loaded complex of zinc sulfide/copper sulfide heterojunction.Study the oxygenated stone
The content of ink-ene, different sulfur sources and microwave heating time were compared with the composite
The effect of photocatalysis on the photocatalytic properties of the complex was investigated
The reason for the catalytic effect.