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Synthetic method of precious metal nanometer optical probe for high-sensitivity and high-selectivity thiourea detection

A high-selectivity, synthetic method technology, applied in the field of nanometers, can solve the problems of high cost of measurement, unsuitable for measurement, etc., and achieve the effect of simple preparation method, sensitive and selective response

Inactive Publication Date: 2012-02-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in order to realize the recognition of target ions, most gold nanoparticles are modified by enzymes or oligomeric peptide chains, which makes the measurement cost high and is not suitable for practical measurement.

Method used

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  • Synthetic method of precious metal nanometer optical probe for high-sensitivity and high-selectivity thiourea detection
  • Synthetic method of precious metal nanometer optical probe for high-sensitivity and high-selectivity thiourea detection
  • Synthetic method of precious metal nanometer optical probe for high-sensitivity and high-selectivity thiourea detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. There are 2.0×10 in the solution -4 Add 14.8 mg of trisodium citrate to 50 mL of mol / L silver nitrate aqueous solution, and stir electromagnetically;

[0019] b. Add 1.0 mL of 0.2 mol / L sodium borohydride solution to the above mixture, and react at 20° C. for 2 hours to obtain water-soluble Ag nanomaterials.

[0020] c. Add 1.5 ml of 0.09 mol / L hydrogen peroxide solution to the obtained water-soluble silver nanomaterials, and react at room temperature for 30 minutes to prepare silver nano optical probes.

Embodiment 2

[0022] 1.0×10 in solution -4 Add 14.8 mg of trisodium citrate to 50 mL of mol / L chloroauric acid aqueous solution, and stir electromagnetically;

[0023]b. Add 1.0 mL of 0.2 mol / L potassium borohydride solution to the above mixture, and react at 50°C for 0.5 hours to obtain water-soluble gold nanomaterials;

[0024] c. Add 6.0 ml of 0.09 mol / L hydrogen peroxide solution to the obtained water-soluble gold nanomaterials, and react at room temperature for 45 minutes to prepare gold nano optical probes.

Embodiment 3

[0026] a. There are 2.0×10 in the solution -4 Add 14.8 mg of trisodium citrate to 50 mL of mol / L aqueous solution of chloroplatinic acid, and stir electromagnetically;

[0027] b. Add 1.0 mL of 0.2 mol / L hydrazine hydrate solution to the above mixture, and react at 20°C for 2 hours to obtain water-soluble platinum nanomaterials;

[0028] c. Add 0.2 ml of 0.09 mol / L hydrogen peroxide solution to the obtained water-soluble silver nanomaterial, and react at room temperature for 20 minutes to prepare a platinum nano-optical probe.

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Abstract

The invention provides a synthetic method of a precious metal nanometer optical probe for the high-sensitivity and high-selectivity thiourea detection. The synthetic method provided by the invention comprises the following steps of: a, adding trisodium citrate into a soluble salt solution, in which precious metals (silver / gold III / platinum IV) ions are dissolved as a surface modifier; b, adding a reducing agent into the above mixed liquor, and reacting for a certain time at a certain temperature to obtain a water-soluble precious metal nano-material; c, adding the water-soluble precious metal nano-material into a hydrogen peroxide solution at a certain concentration, and reacting for a certain time at room temperature to finally obtain the water-soluble precious metal nanometer optical probe. The precious metal nanometer optical probe prepared in the invention shows a strong plasma resonance absorption in the visible region. In addition, the optical probe has sensitive response to selection for thiourea, and the detection limit by visual inspection reaches 5nM.

Description

Technical field: [0001] The invention relates to the field of nanotechnology, in particular to a synthesis method of a water-soluble, high-absorption coefficient noble metal nano optical probe; the invention also relates to the application of the noble metal nano optical probe in analysis and detection. Background technique: [0002] Thiourea (Tu), also known as thioamide, is a sulfur-containing pollutant in water and soil, and has carcinogenic effects on mammals [Abbasi S, Khani H, Hosseinzadeh L and Safari Z 2010 J.Hazard.Mater.174 257- 262]. Due to the wide application of thiourea and its derivatives in various fields such as electrodeposition of copper and other metals, inhibition of metal corrosion, medicine, fertilizers, herbicides, insecticides and rubber vulcanization [Perez-Ruiz T, Martinez-Lozano C , Tomas V and Casajus R 1995 Talanta 42391-394; Smyth M R and Osteryoung J G 1977 Anal.Chem.49 2310-2314; de Oliveira A N, de Santana H, Zaia C T and Zaia D A M 2004 J....

Claims

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Application Information

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IPC IPC(8): C07F1/10C07F1/12C07F15/00C09K11/06G01N21/31
Inventor 王光丽孙家娣庞青青董玉明
Owner JIANGNAN UNIV
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