Method for preparing europium-doped lanthanum fluoride porous nanospheres by using herring sperm deoxyribonucleic acid (DNA) as template

A technology of europium lanthanum fluoride and herring essence, applied in the field of preparing europium-doped lanthanum fluoride porous nanospheres

Inactive Publication Date: 2011-06-01
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

At present, there is no application of DNA as a template to

Method used

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  • Method for preparing europium-doped lanthanum fluoride porous nanospheres by using herring sperm deoxyribonucleic acid (DNA) as template
  • Method for preparing europium-doped lanthanum fluoride porous nanospheres by using herring sperm deoxyribonucleic acid (DNA) as template
  • Method for preparing europium-doped lanthanum fluoride porous nanospheres by using herring sperm deoxyribonucleic acid (DNA) as template

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Embodiment

[0020] Example: Take 0.0623g of herring sperm DNA, put it in 20ml of deionized water, stir at a low speed for half an hour, and prepare a DNA solution with a concentration of 3.12mg / mL. According to La 3+ / Eu3+ The molar ratio is 95:5, weigh 0.0264g europium oxide (Eu 2 o 3 ) into a beaker, add nitric acid solution with a volume ratio of nitric acid and deionized water of 1:1 to make it completely dissolved, and slowly evaporate to remove excess nitric acid. After cooling to room temperature, add 60mL of deionized water to obtain Eu(NO 3 ) 3 solution. Weigh 1.2626g of La(NO 3 ) 3 ·6H 2 O, added to Eu(NO 3 ) 3 solution, stir to dissolve completely. Add the prepared DNA solution dropwise to the prepared La(NO 3 ) 3 and Eu(NO 3 ) 3 In the mixed solution, stir at room temperature for 24 hours, so that the positively charged lanthanum ions and europium ions are fully adsorbed on the negatively charged phosphate radicals on the DNA and the N atoms on the bases. Weigh 0...

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Abstract

The invention relates to a method for preparing europium-doped lanthanum fluoride porous nanospheres by using herring sperm deoxyribonucleic acid (DNA) as a template, and belongs to the technical field of nano material preparation. The method comprises the following three steps of: (1) preparing mixed solution, namely dissolving Eu2O3 in nitric acid, evaporating to obtain a Eu(NO3)3 crystal, adding deionized water and La(NO3)3.6H2O to obtain mixed solution of La(NO3)3 and Eu(NO3)3 (the europium nitrate accounts for 5 mole percent), and dripping herring sperm DNA aqueous solution into the mixed solution of La(NO3)3 and Eu(NO3)3 to form mixed solution of La(NO3)3, Eu(NO3)3 and herring sperm DNA; (2) preparing LaF3:5 percent Eu<3+> precipitates, namely dripping NH4F aqueous solution into the mixed solution to obtain the LaF3:5 percent Eu<3+> precipitates; and (3) preparing LaF3:5 percent Eu<3+> porous nanospheres, namely transferring the LaF3:5 percent Eu<3+> precipitates to a hydrothermal reaction kettle, reacting at the temperature of 160 DEG C for 12 hours, performing centrifugal separation on precipitates, washing by using absolute ethanol, and performing vacuum drying at the temperature of 60 DEG C for 24 hours to obtain the LaF3:5 percent Eu<3+> porous nanospheres with good crystal forms and the diameter of 40 to 70nm. The method is simple, practicable, economic and environmental-friendly, and has a wide application prospect.

Description

technical field [0001] The invention relates to the field of nanomaterial preparation research, in particular to a method for preparing europium-doped lanthanum fluoride porous nanospheres by using herring sperm DNA as a template. Background technique [0002] Rare earth fluorides have low phonon energy, good thermal and environmental stability, and are widely used as luminescent material substrates, solid electrolytes, lubricants, steel and non-ferrous metal alloy additives, electrode materials, chemical sensors and biosensors, etc. Rare earth fluoride nanomaterials with various morphologies, such as nanoparticles, nanotubes, nanorods, nanofibers and nanobelts, etc. LaF 3 :Eu 3+ Nanomaterials are important red fluorescent materials with broad application prospects, and have become one of the hotspots in the field of nanoluminescent materials research. For example, Meng J X et al prepared 30-50nm hexagonal LaF by hydrothermal method 3 :Eu 3+ Nanoparticles (Spectrochimi...

Claims

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Application Information

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IPC IPC(8): B01J13/02
Inventor 董相廷刘璐王进贤于源华刘桂霞于文生
Owner CHANGCHUN UNIV OF SCI & TECH
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