With increasing environmental protection awareness, developing efficient and environmentally friendly photocatalytic materials has become an urgent need. Activated Zinc Sulfide (activated zinc sulfide, ZnS for short), as a new type of photocatalytic material, has excellent photocatalytic performance and environmental protection properties, so it has received widespread attention. This article will detail the properties, preparation methods, photocatalytic properties and applications of Activated Zinc Sulfide in environmental protection.
Properties of Activated Zinc Sulfide
Activated Zinc Sulfide is a direct band gap semiconductor material with a band gap of approximately 3.6-3.7 eV, located in the visible light region. Therefore, Activated Zinc Sulfide has excellent light absorption properties and can absorb the visible part of sunlight and convert it into electrical energy. In addition, Activated Zinc Sulfide also has high electron mobility and stability, which makes it have good application potential in photocatalysis.
Compared with traditional ZnS, Activated Zinc Sulfide has a higher specific surface area and a more developed pore structure, which gives it higher photocatalytic activity and adsorption capacity.
Preparation method of Activated Zinc Sulfide
The methods for preparing Activated Zinc Sulfide include chemical synthesis and physical activation. The chemical synthesis method synthesizes ZnS from zinc and sulfur raw materials through chemical reactions and then performs activation treatment under specific conditions. The physical activation rule is to activate ZnS through physical means (such as mechanical ball milling, laser irradiation, etc.). Both methods can obtain high-purity Activated Zinc Sulfide, but the specific preparation conditions and processes must be further optimized.
Photocatalytic properties of Activated Zinc Sulfide
Activated Zinc Sulfide has excellent photocatalytic properties and can effectively degrade organic pollutants and toxic and harmful substances. Its photocatalytic performance is mainly attributed to its semiconductor properties and developed pore structure. When visible light is illuminated, the Activated Zinc Sulfide electrons transition from the valence band to the conduction band, forming photogenerated electrons and holes. These photogenerated electrons and holes can undergo redox reactions with organic pollutants, degrading them into harmless substances. In addition, Activated Zinc Sulfide also has high photocatalytic activity and stability, giving it excellent application potential in environmental protection.
Application of Activated Zinc Sulfide in the field of environmental protection
Sewage treatment: Activated Zinc Sulfide can be used in photocatalytic oxidation reactions in sewage treatment to degrade organic pollutants and toxic and harmful substances effectively. Compared with traditional sewage treatment methods, photocatalytic oxidation technology based on Activated Zinc Sulfide has higher treatment efficiency and lower energy consumption.
Air purification: Activated Zinc Sulfide can also be used in photocatalytic oxidation reactions in air purification to remove harmful substances and odorous gases in the air effectively. Compared with traditional air purification technology, photocatalytic oxidation technology based on Activated Zinc Sulfide has higher purification efficiency and longer service life.
Environmentally friendly building materials: In addition to its application in sewage treatment and air purification, Activated Zinc Sulfide can also be used as an environmentally friendly building material. It can be used as a coating or additive on the exterior walls, roofs and floors of buildings, using its excellent photocatalytic properties to degrade pollutants and odorous gases and improve indoor air quality.
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