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Preparation of gold nanocluster based fluorescent composite material and application in ion detection

A nano-cluster, nano-technology, applied in luminescent materials, material analysis by optical means, nano-technology, etc., can solve the problems of expensive copper ion detection, complicated process, long detection time, etc., and achieve short experimental period and preparation method. Simple and easy to synthesize effect

Inactive Publication Date: 2019-09-20
CHANGCHUN UNIV OF TECH
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Problems solved by technology

[0005] The present invention aims to solve the problems of high cost, complex process and long detection time of the existing copper ion detection, and provides the preparation of a nano-fluorescent device with mesoporous silica-limited gold nanocluster-induced fluorescence enhancement and its application in ion detection

Method used

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  • Preparation of gold nanocluster based fluorescent composite material and application in ion detection
  • Preparation of gold nanocluster based fluorescent composite material and application in ion detection
  • Preparation of gold nanocluster based fluorescent composite material and application in ion detection

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specific Embodiment approach 1

[0027] Specific Embodiment 1: The preparation method of a nano-fluorescent device with enhanced fluorescence induced by mesoporous silica-confined gold nanoclusters in this embodiment is characterized in that the method comprises the following steps:

[0028] 1. Dissolve 2-5 mmol of chloroauric acid in 20-30 ml of deionized water, 4-10 mmol of glutathione in 20-30 ml of deionized water and ultrasonically dissolve and mix at room temperature respectively to form a uniform Mix the solutions, and react the mixed solution at 70-100° C. for 6-8 h under stirring conditions to obtain solution A. Put solution A into a centrifuge tube and centrifuge at high speed to remove unreacted raw materials, take the precipitate, wash with acetonitrile and water mixed solution for 3 times and dissolve in deionized water to obtain solution B;

[0029] 2. By using the Stöber method, add 15-20 ml TEOS to a mixed solution consisting of 130-160 ml ethanol, 30-40 ml water and 180-210 ml ammonia water a...

specific Embodiment approach 2

[0031] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ultrasonic power in Step 1 is 60-100 W.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the reaction temperature in Step 1 is 80-90°C. Others are the same as those in the first or second embodiment.

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Abstract

Relating to a preparation method and application of a novel nanocomposite material, the invention provides a preparation method of a mesoporous silica-restricted gold nanocluster-induced fluorescence enhanced nano-fluorescent device and application of the same in copper ion detection, and aims to solve the problems of high cost, complex process and long detection time in existing copper ion detection methods. The method includes: 1. taking chloroauric acid as the raw material, adopting reduced glutathione as the reducing agent and stabilizer, and utilizing thermal reduction means to synthesize a gold nanocluster solution A from the bottom up under a high temperature stirring condition, loading the solution A into a centrifugal tube for centrifugation, taking the precipitate, using a mixed solution of acetonitrile and water to perform washing 3 times and performing dissolving in deionized water to obtain a solution B; 2. making TEOS, ethanol, water and ammonia water into solid silica particles by Stober process, washing and drying the silica particles, then taking NaoH as the etchant, and performing sealed stirring overnight in a flask, then loading the obtained solution into a centrifugal tube for centrifugation 3 times to remove the precipitate left by the supernatant, and performing washing and drying to obtain mesoporous silica; and 3. putting the mesoporous silica into the solution B under a stirring condition so as to obtain the novel nanocomposite material with specific detection application in cooper ions. The composite material prepared by the method has the characteristics of low cost, simple operation, rapid detection and high sensitivity, and can be used in the fields of environmental ion detection and bioimaging.

Description

technical field [0001] Preparation of nano-fluorescence device with enhanced fluorescence induced by mesoporous silica-confined gold nano-clusters and its application in ion detection. Background technique [0002] Copper ions (Cu 2+ ), as an essential trace element in living systems, is involved in many physiological processes. For example, copper ions play an important role in binding enzyme cofactors and bone formation. On the other hand, excess Cu 2+ Ions are highly toxic to organisms and can cause disturbances in the gastrointestinal tract and cellular balance, as well as severe neurodegenerative diseases, including Alzheimer's, Parkinson's and prion diseases, among others. In addition, excess Cu 2+ Environmental pollution caused by ions is also a serious problem, if oceans, rivers or lakes contain excessive amounts of Cu 2+ ions, which will hinder the self-purification of these water bodies and damage biological aftertreatment systems. Therefore, Cu 2+ Ions have...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/58G01N21/64B82Y30/00B82Y40/00
CPCC09K11/06C09K11/582G01N21/643B82Y30/00B82Y40/00
Inventor 杨旭东王生旭丁娟
Owner CHANGCHUN UNIV OF TECH
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