Preparation method of near-infrared long afterglow luminescent nanometer particle
A nanoparticle and external length technology, which is applied in the field of preparation of near-infrared long-lasting luminescent nanoparticles, can solve the problems that are not conducive to the biological tissue penetration ability of long-lasting nanoparticles, the large size of long-lasting nanoparticles, and the difficulty of optical imaging. , to achieve the effect of low cost, long afterglow time and small particle size
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[0018] Example 1:
[0019] A method for preparing near-infrared long afterglow luminescent nanoparticles is prepared by the mesoporous silica template method, and the steps are as follows:
[0020] 1) Dissolve the triblock copolymer surfactant P123 in a hydrochloric acid solution and a deionized water solution with a concentration of 1.6 mol / L to obtain a mixed solution, and then add ethyl orthosilicate (TEOS) to the mixed solution. The mass ratio of block copolymer surfactant P123, hydrochloric acid, deionized water and TEOS is 5:0.084:19:170. Stir in a water bath at 30°C for 24 hours, and then hydrothermally heat at 100°C for 48 hours. Calcined in a muffle furnace at 550°C for 5 hours to prepare mesoporous silica;
[0021] 2) Combine a zinc nitrate aqueous solution with a concentration of 0.2 mol / liter, a gallium nitrate aqueous solution with a concentration of 0.2 mol / liter, a germanium ion solution with a concentration of 0.2 mol / liter, a chromium nitrate aqueous solution with a...
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[0026] Example 2:
[0027] A method for preparing near-infrared long afterglow luminescent nanoparticles is prepared by the mesoporous silica template method. The steps and methods are basically the same as those in Example 1, except that: step 2) co-doped trivalent rare earth ion nitric acid The saline solution is an aqueous solution of praseodymium nitrate.
[0028] The long afterglow luminescent nanoparticles prepared in this example were used as samples for observation and characterization, and the detection results were similar to those of Example 1.
[0029] The long afterglow luminescent nanoparticles prepared in this example were used as samples for observation and characterization, and the detection results were similar to those of Example 1.
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[0030] Example 3:
[0031] A method for preparing near-infrared long afterglow luminescent nanoparticles is prepared by the mesoporous silica template method. The steps and methods are basically the same as those in Example 1, except that: step 2) co-doped trivalent rare earth ion nitric acid The brine solution is an aqueous solution of ytterbium nitrate.
[0032] The long afterglow luminescent nanoparticles prepared in this example were used as samples for observation and characterization, and the detection results were similar to those of Example 1.
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