Preparation method and application of copper sulphide nano-material

Abstract

The invention discloses a preparation method for a copper sulphide nano-material with near infrared absorption performance and near infrared light sterilizing capacity of the copper sulphide nano-material to Escherichia coli and staphylococcus aureus, and belongs to the fields of metal nano-material preparation and biomedical application. The copper sulphide nano-material is synthesized by adopting a water bath method; the reaction conditions are mild; the method is simple; the copper sulphide nano-material which are uniform in particular sizes and high in dispersibility and have strong absorbing performance at about 1,000 nm is prepared successfully by regulating temperature, pH and protein using amount; under the irradiation of near infrared light of 980 nm, near infrared light can be effectively converted into heat energy by the material, so that the Escherichia coli and the staphylococcus aureus can be killed within several minutes; an alternative treatment mode can be provided for clinical treatment of skin diseases because of unique photo-thermal sterilizing capacity and low cost of the material.

Description

technical field [0001] The invention relates to the fields of metal nanomaterial preparation and biomedical application, in particular to a preparation method and application of a BSA-CuS nanocomposite material. Background technique [0002] Whether in medicine, food, public health or other fields, bacterial infection has become a challenge all over the world. According to incomplete statistics, the global food industry loses nearly 600 billion U.S. dollars every year due to bacterial contamination. On the other hand, many patients died of postoperative bacterial infection. According to the report of the World Health Organization (WHO), 2 million people in China die from bacterial infections every year. At present, antibiotics are still the main drugs used clinically to treat bacterial infections. It has a history of nearly 100 years since its discovery, and it can very effectively inhibit the growth and reproduction of bacteria. However, the extensive use, abuse and irr...

AI Technical Summary

Problems solved by technology

However, the disadvantage of silver nanoparticles is that once exposed to air or water, silver ions begin to be slowly released into the environment and undergo chemical and biological transformations, causing great harm to the ecosystem

Although they also have great advantages in antibacterial aspects, the non-degradability and unknown toxicity of graphene oxide to the body and the high cost of gold limit their further clinical and laboratory applications.

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