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Synthesis and application of water soluble ZnxCd(1-x)S nano composite material used for copper ion determination

A nano-composite material, water-soluble technology, applied in the nano field, can solve the problem of no quantum dot preparation method, and achieve the effects of easy control of production conditions, simple preparation method and low cost

Inactive Publication Date: 2011-02-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no water-soluble Zn has been found so far x Cd (1-x) Preparation method of S quantum dots

Method used

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  • Synthesis and application of water soluble ZnxCd(1-x)S nano composite material used for copper ion determination
  • Synthesis and application of water soluble ZnxCd(1-x)S nano composite material used for copper ion determination
  • Synthesis and application of water soluble ZnxCd(1-x)S nano composite material used for copper ion determination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. There are 4.0×10 in the solution -4 mol / L cadmium chloride and 1.0×10 -4 Add 4.8 mg of cysteine ​​to 50 mL of an aqueous solution of mol / L zinc sulfate, and stir electromagnetically to prepare a mixed solution of Cd-Cys and Zn-Cys;

[0020] b. Use 0.1M NaOH solution to adjust the pH of the mixture to 7.0, and flush it with high-purity nitrogen for 30 minutes to remove the oxygen in the mixture;

[0021] c. Add 0.1mL of 0.2mol / L sodium sulfide solution to the above mixture, heat and reflux for 30 minutes to obtain water-soluble Zn x Cd (1-x) S nanocomposites.

Embodiment 2

[0023] a. There are 4.0×10 in the solution -4 mol / L cadmium nitrate and 2.0×10 -4 Add 6.0 mg of cysteine ​​to 50 mL of aqueous solution of mol / L zinc nitrate to prepare a mixed solution of Cd-Cys and Zn-Cys;

[0024] b. Use 0.1M KOH solution to adjust the pH of the mixture to 7.0, and flush it with high-purity nitrogen for 30 minutes to remove the oxygen in the mixture;

[0025] c. Add 0.1mL 0.2mol / L sodium sulfide to the above mixture, and heat to reflux for 15 minutes to obtain Zn x Cd (1-x) S nanocomposites.

Embodiment 3

[0027] a. There are 4.0×10 in the solution -4 mol / L cadmium nitrate and 5.0×10 -5 Add 14.4 mg of cysteine ​​to 50 mL of aqueous solution of mol / L zinc sulfate to prepare a mixed solution of Cd-Cys and Zn-Cys;

[0028] b. Adjust the pH of the mixed solution to 7.0 with 0.1M ammonia solution, and flush into high-purity nitrogen to remove the oxygen in the mixed solution;

[0029] c. Add 0.1mL 0.2mol / L sodium sulfide to the above mixture, and heat to reflux for 1 hour to obtain Zn x Cd (1-x) S nanocomposites.

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Abstract

The invention provides a method for synthesizing water soluble ZnxCd(1-x)S nano composite material used for copper ion determination and application thereof. The synthesis method includes the following steps: a, cysteine is added into mixed solution dissolved with soluble salt of cadmium ion and zinc ion, thus obtaining mixed solution of Cd-Cys and Zn-Cys; b, aqueous alkali is used for regulating pH value of the mixed solution, and inertia gas is introduced in, so as to remove oxygen in the mixed solution; c, sodium sulphide is added into the mixed solution, and reaction is carried out under the condition of electromagnetic stirring, thus obtaining the water soluble ZnxCd(1-x)S nano composite material. The nano composite material prepared by the invention has higher fluorescence intensity compared with simple ZnS or CdS, the nano composite material has sensitive selectivity response on copper ion when being taken as fluorescent probe, and detection limit reaches 1.0nM. The provided method is applied to determination of copper ion in water body and vegetable, and effect is satisfied.

Description

Technical field: [0001] The invention relates to the field of nanotechnology, in particular to Zn with water solubility and high luminous efficiency x Cd (1-x) The synthetic method of S nanocomposite material; The present invention also relates to this Zn x Cd (1-x) Application of S materials in analysis and detection. Background technique: [0002] Metal ions play an important role in the biological and environmental fields, among which copper ions, as an essential nutrient element for the human body, play a key role in the process of cell biochemistry, and the amount of copper ions in the human body is closely related to neurodegenerative diseases; at the same time , excessive copper ions are one of the main polluting metal ions in the environment. Therefore, it is of great significance to develop a highly sensitive and selective method for the determination of copper ions [Wu, Q.; Anslyn, E.V.J.Am.Chem.Soc., 2004, 126:14682-14683; Shao, N.; Chen, W.C. ; Tu, X.J.; Guo...

Claims

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Application Information

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IPC IPC(8): G01N33/52B82B3/00
Inventor 王光丽董玉明李在均
Owner JIANGNAN UNIV
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