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Synthesis and use of nano Ag optical probe for use in colorimetric-process mercury ion detection

An optical probe, mercury ion technology, applied in the nano field, can solve the problems of high measurement cost, unsuitable measurement, etc., and achieve the effects of low cost, stable product optical properties, and simple preparation method.

Inactive Publication Date: 2011-07-20
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Synthesis and use of nano Ag optical probe for use in colorimetric-process mercury ion detection
  • Synthesis and use of nano Ag optical probe for use in colorimetric-process mercury ion detection
  • Synthesis and use of nano Ag optical probe for use in colorimetric-process mercury ion detection

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Experimental program
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Effect test

Embodiment 1

[0016] a. There are 2.0×10 in the solution -4 Add 4.8 mg of cysteine ​​to 50 mL of mol / L silver nitrate aqueous solution, and stir electromagnetically to prepare Ag-Cys solution;

[0017] 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.

Embodiment 2

[0019] 1.0×10 in solution -4 Add 46.02 mg of sodium tartrate to 50 mL of mol / L silver perchlorate aqueous solution, and stir electromagnetically to prepare Ag-Tar solution;

[0020] 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 hour to obtain water-soluble Ag nanomaterials.

Embodiment 3

[0022] a. There are 4.0×10 in the solution -4 Add 29.4 mg of trisodium citrate to 50 mL of mol / L silver nitrate aqueous solution, and stir electromagnetically to prepare Ag-Cit solution;

[0023] 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 Ag nanomaterials.

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PUM

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Abstract

The invention provides the synthesis method and use of a nano Ag optical probe for use in colorimetric-process mercury ion detection. The synthesis method comprises the following steps: a, adding a modifier into soluble salt solution containing Ag ions to obtain Ag-modifier mixed solution; and b, adding a reducer into the mixed solution, and reacting for a certain time period at a certain temperature to obtain the water soluble Ag nano material. The Ag nano material prepared by the method demonstrates high plasma resonance absorption at 400 nanometers, and as an optical probe, has flexible mercury ion selectivity response. The macroscopic detection limit reaches 400nM.

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 nano-Ag optical probe; the invention also relates to the application of the nano-Ag optical probe in analysis and detection. Background technique: [0002] Mercury is a common toxic heavy metal, mainly in the form of mercury ions (Hg 2+ ) exists in the form of water, causing great harm to human health and the environment, and is an important indicator for water environment monitoring. Currently, Hg in environmental water samples 2+ The determination mainly adopts plasma emission spectrometry and mass spectrometry [Li Y, Liu S J, Jiang D Q, Jiang Y, Yan X P. Chinese Anal. Chem., 2008, 36, 793-798; Wang M, Feng W, Shi J, Zhang F, Wang B, Zhu M, Li B, Zhao Y, Chai Z. Talanta, 2007, 71, 2034-2039], fluorescence method [Wang S, Forzani E S, Tao N. Anal. Chem., 2007, 79, 4427-4432; Li Y, Chai Y Q, Yuan R, Zhang L N, Li...

Claims

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Application Information

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IPC IPC(8): C07F1/10G01N21/31B82Y40/00
Inventor 王光丽王铖张文静喻川李在均
Owner JIANGNAN UNIV
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