Detecting method of iodide ions based on graphene/DNA (Deoxyribonucleic Acid)/sliver nano composite material

A composite material and detection method technology, applied in nanotechnology for sensing, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of poor selectivity and high cost of iodide ion detection

Active Publication Date: 2015-07-08
常熟紫金知识产权服务有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of method for detecting iodide ion, to overcome the poor selectivity of detecting iodide ion in the prior art, the deficiencies such as high cost, provide a kind of simple method for preparing graphene / DNA / silver nano-composite material in addition

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  • Detecting method of iodide ions based on graphene/DNA (Deoxyribonucleic Acid)/sliver nano composite material
  • Detecting method of iodide ions based on graphene/DNA (Deoxyribonucleic Acid)/sliver nano composite material
  • Detecting method of iodide ions based on graphene/DNA (Deoxyribonucleic Acid)/sliver nano composite material

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Embodiment 1

[0034] Graphene oxide was prepared by the hummers method, a 250 mL reaction flask was assembled in an ice-water bath, and 46 mL H 2 SO 4, add a solid mixture of 2 g graphite powder and 1 g sodium nitrate under stirring, then add 6 g potassium permanganate in portions, control the reaction temperature not to exceed 20°C, stir for a period of time, then raise the temperature to about 35°C, and continue stirring After 30 min, slowly add 92 mL of deionized water, continue to stir for 20 min, add 80 mL of 3% hydrogen peroxide to reduce the residual oxidant, and turn the solution into bright yellow, then centrifuge and wash the above solution several times, first with 8000 Centrifuge at a rotating speed of 3000 rpm, remove the residue in the lower layer, and then centrifuge at a rotating speed of 3000 rpm to obtain the supernatant to obtain a graphene oxide aqueous solution.

[0035] After sonicating graphene oxide (0.6 mg / mL) for 40 minutes, pipette 2 mL of graphene oxide into a ...

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Abstract

The invention discloses a detecting method of iodide ions based on a graphene / DNA (Deoxyribonucleic Acid) / sliver nano composite material. The graphene / DNA / sliver nano composite material is used as a working electrode, a saturated calomel electrode is used as a reference electrode, and a platinum electrode is used as a counter electrode to measure iodine ions with different concentrations; response current of the iodine ions and the concentration of the iodine ions are in linear relation; linear range is 1*10 <-6>mol / L-5*10<-3> mol / L; and detection limit is 7*10<-7> mol / L (S / N=3).

Description

technical field [0001] The invention relates to the application of graphene composite materials, in particular to a preparation method and application of graphene / DNA / silver nano composite materials. Background technique [0002] Iodine is one of the important elements required by humans and animals, and plays an important role in life activities. Iodine deficiency can cause a series of metabolic disorders, resulting in goiter, cretinism, etc. At the same time, the intake of iodine should not be too high. Long-term exposure to iodine and its compounds will cause acute and chronic poisoning, damage the skin and mucous membranes, and affect the functions of the nervous system and endocrine system. Therefore, the sensitive determination of iodide ion is of great significance. At present, although there are many analysis methods for iodide ion, it is still one of the elements that are difficult to quickly and accurately determine due to its low content in the sample and its ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48B82Y15/00B82Y30/00
Inventor 孔粉英李韦韦王伟谈立伟
Owner 常熟紫金知识产权服务有限公司
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