Preparation method of up-conversion mesoporous tin dioxide diagnosis and treatment nanocapsule for near-infrared light response
A near-infrared light response, tin dioxide technology, applied in photodynamic therapy, chemical instruments and methods, capsule delivery, etc., can solve the problem of low light utilization rate, inability to achieve efficient drug loading capacity, poor photocatalytic effect, etc. problems, to achieve the effects of good stability and biocompatibility, remarkable photocatalytic performance, and high photothermal conversion efficiency
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specific Embodiment approach 1
[0037] Embodiment 1: In this embodiment, a method for preparing near-infrared light-responsive up-conversion mesoporous tin dioxide diagnosis and treatment nanocapsules is carried out according to the following steps:
[0038] 1. Preparation of UCNPs by high temperature pyrolysis method:
[0039] ①. Under the condition of magnetic stirring, mix gadolinium oleate, ytterbium oleate, thulium oleate, sodium fluoride, octadecene and oleic acid evenly, and heat to a temperature of 110°C to 120°C in a vacuum state, and Under the condition of temperature 110℃~120℃, keep warm for 30min~1h, close the vacuum device, feed nitrogen, raise the temperature to 300℃~310℃, and react for 1h~ under the condition of temperature 300℃~310℃ 1.5h, naturally cool down to room temperature after the reaction, collect by centrifugation and wash to obtain NaGdF 4 : 20%Yb / 0.5%Tm nanoparticles, NaGdF 4 : 20% Yb / 0.5% Tm nanoparticles dispersed in cyclohexane liquid to get NaGdF 4 : the cyclohexane solution...
specific Embodiment approach 2
[0055] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the washing described in step one 1. and step one 2. is washing alternately with ethanol and cyclohexane; the washing described in step two is washing with ethanol Three times; the washing described in step three is ethanol washing. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0056] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the molar ratio of gadolinium oleate and ytterbium oleate described in step one 1. is 0.795:0.2; The mol ratio of gadolinium oleate and thulium oleate is 0.795:0.005; the mol ratio of gadolinium oleate and sodium fluoride described in step one 1. is 0.75:1; the quality of gadolinium oleate described in step one 1. and The volume ratio of octadecene is 1g:(15-20)mL; the volume ratio of the mass of gadolinium oleate described in step ① to oleic acid is 1g:(15-20)mL. Others are the same as in the first or second embodiment.
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