Aspartic acid modified gold nanoparticles and preparation method and application thereof

Abstract

The invention provides aspartic acid modified gold nanoparticles and a preparation method and application thereof. Aspartic acid, as a reducing agent and a stabilizing agent, reacts with aurichlorohydric acid so as to prepare gold nano; and the synthesized functionalized gold nano can be used for identifying specificity of trivalent chromium ions. Functionalized modification on the surface of thegold nano is realized without complex ligand exchange. The method is simple, can identify specificity of trivalent chromium ions by eyes through interaction of the trivalent chromium ions and the synthesized functionalized gold nano, thereby having a good application prospect in the environment analysis chemical field.

Description

technical field [0001] The disclosed technical field of nanomaterial research relates to an aspartic acid-modified gold nanoparticle and its preparation method and application. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In recent years, with the rapid development of petroleum, energy, chemical, daily chemical, mining and other industries, a large amount of heavy metal ions are discharged along with industrial wastewater, making heavy metal pollution one of the most serious water environmental problems facing our country. Trivalent chromium ion (Cr 3+ ) as one of the essential trace elements for the human body, it plays an important role in regulating body fat metabolism, glucose metabolism, etc., but excessive intake will combine with DNA, causing damage to cell components and affecting the normal function of cells structure and morphology...

AI Technical Summary

Problems solved by technology

Trivalent chromium ion (Cr 3+ ) as one of the essential trace elements for the human body, it plays an important role in regulating body fat metabolism, glucose metabolism, etc., but excessive intake will combine with DNA, causing damage to cell components and affecting the normal function of cells structure and morphology, and even induce tumor

[0005] According to the research of the inventors of the present disclosure, the common preparation methods of gold nanoparticles mainly include sulfhydryl ligand method, electrochemical synthesis method, photochemical synthesis method, sodium citrate reduction method, etc., but the above-mentioned several methods all have certain deficiencies. For example, the sulfhydryl ligand method usually needs to add strong reducing agents such as ascorbic acid and sodium borohydride during the synthesis process, while the electrochemical synthesis method and photochemical synthesis method have the disadvantage of low yield.

Sodium citrate reduction method is the most commonly used method to prepare gold nanoparticles, but in the actual analysis and detection of gold nanoparticles synthesized by this method, further ligand exchange reactions are usually required to make the surface bands have specific The functional group of the recognition function, the operation steps are cumbersome and easily affected by the environment

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