Preparation method of water-based compound rare earth nano La1-x-yCexTbyPO4 fluorescent particle for fingerprint manifestation

A la1-x-ypo4, nano-fluorescence technology, applied in chemical instruments and methods, applications, luminescent materials, etc., can solve the problem of wide particle size distribution, irregular particle shape, and can not meet the requirements of particle size and uniformity of nanoparticles, etc. problem, to achieve good water solubility, low cost, and good fingerprint display effect

Inactive Publication Date: 2010-09-15
BEIJING UNIV OF CHEM TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, these methods aim to explore an easy-to-control synthesis process, but there are few studies on applying its excellent fluorescence properties to biomarkers.
Moreover, these methods synthesize nano-fluorescent powder, which has a wide range of particle size distribution after high-temperature calcination, and irregular particle shapes, which cannot meet the requirements for particle size and uniformity of nanoparticles as biomarkers.
However, there is no report on the fingerprint display of rare earth phosphate composite nano-fluorescent particles synthesized in aqueous phase.

Method used

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  • Preparation method of water-based compound rare earth nano La1-x-yCexTbyPO4 fluorescent particle for fingerprint manifestation
  • Preparation method of water-based compound rare earth nano La1-x-yCexTbyPO4 fluorescent particle for fingerprint manifestation
  • Preparation method of water-based compound rare earth nano La1-x-yCexTbyPO4 fluorescent particle for fingerprint manifestation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1). La 1-x-y PO 4 : Ce x Tb y Preparation of: where x=25%, y=5%

[0019] Weigh 3.031g La(NO 3 ) 3 ·6H 2 O, 1.086g Ce(NO 3 ) 3 ·6H 2 O, 0.2265gTb(NO 3 ) 3 ·6H 2 O was placed in a 250mL beaker, and 100mL deionized water was added to fully dissolve it to obtain a colorless and transparent mixed rare earth ion solution. Stir at room temperature, and slowly add 100mL, 0.1mol / L sodium tripolyphosphate solution (TPP), [(n La +n Ce +n Tb ):n TPP =1:1], adjust the pH=9.0 with NaOH solution, and then heat to make the mixed rare earth ion solution and sodium tripolyphosphate solution react in a 90°C water bath for 3h to obtain a white rare earth suspension colloid, and then dissolve the product in deionized water after centrifugation Can get 400mL, 0.025mol / L of colorless and clear La 0.70 PO 4 : Ce 0.25 Tb 0.05 Sol, add dropwise 1mmol stabilizer sodium hexametaphosphate solution, let stand overnight, set aside.

[0020] (2). Take 100mL of La prepared by (1). ...

Embodiment 2

[0023] Change the molar percentage coefficient of rare earth ion, concrete steps are as follows:

[0024] (1). La 1-x-y PO 4 : Ce x Tb y Preparation of: x = 25%, y = 15%

[0025] Weigh 2.598g La(NO 3 ) 3 ·6H 2 O, 1.086g Ce(NO 3 ) 3 ·6H 2 O, 0.6795gTb(NO 3 ) 3 ·6H 2 O was placed in a 250mL beaker, and 100mL deionized water was added to fully dissolve it to obtain a colorless and transparent mixed rare earth ion solution. Stir at room temperature, and slowly add 100mL, 0.1mol / L sodium tripolyphosphate solution (TPP), [(n La +n Ce :+n Tb ):n TPP =1:1], NaOH solution adjusted to pH=9.0, and then heated to react the rare earth mixed solution and sodium tripolyphosphate solution in a 90°C water bath for 3 hours to obtain a white rare earth suspension colloid, which can be obtained by dissolving the product in deionized water after centrifugation 400mL, 0.025mol / L of colorless and clear La 0.60 PO 4 : Ce 0.25 Tb 0.15 Sol, add dropwise 1mmol stabilizer sodium hexam...

Embodiment 3

[0029] Change the molar percentage coefficient of rare earth ion, concrete steps are as follows:

[0030] (1). La 1-x-y PO 4 : Ce x Tb y Preparation of: x = 10%, y = 15%

[0031] Weigh 3.248g La(NO 3 ) 3 ·6H 2 O, 0.4343g Ce(NO 3 ) 3 ·6H 2 O, 0.6795gTb(NO 3 ) 3 ·6H 2 O was placed in a 250mL beaker, and 100mL deionized water was added to fully dissolve it to obtain a colorless and transparent mixed rare earth ion solution. Stir at room temperature, and slowly add 100mL, 0.1mol / L sodium tripolyphosphate solution (TPP) dropwise, [(n La +n Ce :+n Tb ):n TPP =1:1], NaOH solution adjusted to pH=9.0, and then heated to react the rare earth mixed solution and sodium tripolyphosphate solution in a 90°C water bath for 3 hours to obtain a white rare earth suspension colloid, which can be obtained by dissolving the product in deionized water after centrifugation 400mL, 0.025mol / L of colorless and clear La 0.75 PO 4 : Ce 0.10 Tb 0.15 Sol, add dropwise 1mmol stabilizer sodi...

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Abstract

The invention discloses a water-based rare earth nano fluorescent particle for fingerprint manifestation and a preparation method thereof, belonging to the field of biomarkers. The water-based rare earth nano fluorescent particle comprises the following components of La1-x-yPO4:CexTby, wherein x=5-40 percent and y=5-25 percent. The preparation method comprises the steps of: weighting three rare earth inorganic salts according to a certain stoichiometric ratio, adding water for dissolving, and then dropping a sodium tripolyphosphate solution; then regulating the pH value to be equal to 7.0-11.0 by using an NaOH solution, controlling a bath temperature to be 30-100 DEG C, reacting for 1.5-3.5h to obtain a white suspension colloid; washing by using water and centrifuging to remove nitrate ions and excessive microcosmic salts; dissolving by using deionized water to obtain a transparent colloid solution; dropping a sodium hexametaphosphate solution as a stabilizing agent, stirring and standing for one night, then dropping a surface modifying agent to ensure that the mol ratio of the rare earth ions and the surface modifying agent is 1:(0.5-5); and regulating the pH value to be equal to 7.0-11.0 by using the NaOH solution, heating to 80-100 DEG C, stirring for 1-3h to form a rare earth complex with functional groups. The invention has simple process, low cost, better manifestation effect on fingerprints on the surface of a smooth object, and good application prospect.

Description

technical field [0001] The invention relates to a preparation method of water-soluble rare earth nano fluorescent particles and its application in fingerprint display, belonging to the fields of nano material preparation technology and biological analysis and detection technology. technical background [0002] Rare earth luminescent materials are an important inorganic functional material, and rare earth phosphate materials are widely used in fluorescent lamps, cathode ray tubes, and plasma display materials due to their good thermal and chemical stability and good luminescent properties. . The current research on the application of rare earth fluorescent luminescent markers in biological analysis shows that rare earth ions as fluorescent probes have a series of advantages such as low toxicity, high chemical stability, high and stable luminous intensity, and large Stokes shift. It overcomes the disadvantages inherent in traditional fluorescence analysis methods, such as eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81A61B5/117A61B5/1172
Inventor 刘建军辛娟左胜利于迎春
Owner BEIJING UNIV OF CHEM TECH
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