Nanoparticle photothermal conversion material based on coordination of iron and dopamine and preparation method and application thereof
A photothermal conversion material and nanoparticle technology, applied in the field of nanoparticle photothermal conversion materials and their preparation, can solve the problems of morphology and particle size control, no coordination structure, multiple biological toxic components, etc., and achieve a good shape. appearance, low biological toxicity, and the effect of material green and environmental protection
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Embodiment 1
[0048] A method for preparing a nanoparticle photothermal conversion material based on iron and dopamine coordination, specifically comprising the following steps:
[0049] (1) Weigh 9.72g ferric chloride hexahydrate (FeCl 3 ·6H 2 (2) and 3.24g trimesic acid (trimesic acid), fully dissolved in 120mL pure water, stirring and mixing, to obtain a mixed solution;
[0050] (2) Transfer the mixed solution into a polytetrafluoroethylene hydrothermal reaction kettle, and react at 130°C for 36h-48h. After the reaction is completed, a brownish yellow suspension is obtained, which is naturally cooled to room temperature, and the supernatant is removed by centrifugation. Repeatedly wash and centrifuge the precipitate with methanol and water for 3-6 times, the centrifugation speed is 8000-10000r / min, and the centrifugation time is 10-20min each time, until the supernatant is basically colorless; After drying at ℃, a brown-yellow powder is obtained, which is nano-scale iron-based metal-or...
Embodiment 2
[0054] The photothermal treatment effect of the loaded DA-Fe-MOF-PEG nanomaterial prepared in Example 1 is further tested below.
[0055] 1. Photothermal conversion ability test
[0056] Method: The prepared DA-Fe-MOF-PEG nanomaterials were prepared into a PBS solution with a certain gradient concentration with PBS buffer salt. Placed in a quartz cuvette, use 808nm near-infrared laser at 2W / cm 2 Irradiated at a certain laser power for 10 minutes to detect its heating capacity. At the same time, the material solution with a concentration of 400 μg / mL was repeatedly tested for 5 rounds of temperature rise to verify its photothermal stability.
[0057] Result: if Figure 5 As shown, under near-infrared laser irradiation, the material of the present invention has good photothermal conversion ability. When the concentration is above 500 μg / mL, the final concentration can reach above 40 degrees Celsius. At the same time, the synthesized nanoparticles of the present invention ha...
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