Composite material for simultaneously generating oxygen and active oxygen under near-infrared light excitation, and preparation method and application of composite material
A near-infrared light and composite material technology, applied in the field of composite materials, can solve the problems affecting the efficiency of PDT, slow space transfer, accurate matching of oxygen and photosensitizers, etc., and achieve the effect of improving treatment efficiency.
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[0033] The invention provides a method for preparing a composite material for simultaneous generation of oxygen and active oxygen under near-infrared light excitation, comprising the following steps:
[0034] Step 1, preparation of up-conversion nanoparticles
[0035] Upconverting nanoparticles are prepared by the following method:
[0036] Weigh 1mM rare earth acetate, wherein Y:Yb:Er=78:20:20, and 10mM sodium fluoride, and add them to a three-necked flask containing 10mL oleylamine and 10mL octadecene, continue to feed nitrogen and heat Keep at 120°C for 1 hour; then slowly heat up to 320°C and stir for 1 hour, then cool down to room temperature naturally; add absolute ethanol, centrifuge to obtain a precipitate, wash with water and ethanol three times, and finally obtain upconverting nanoparticles, which are dispersed in in chloroform; finally, 1 mL of 0.1M hexadecyltrimethyl bromide solution was added to the chloroform solution of upconverting nanoparticles, stirred at 70...
Embodiment 1
[0045] The preparation of the composite material used for simultaneous generation of oxygen and active oxygen under the excitation of near-infrared light provided by the present invention, the specific steps are as follows:
[0046] 1. Synthesis of upconversion nanoparticles:
[0047] Weigh 1mM rare earth acetate (wherein Y:Yb:Er=78:20:20) and 10mM sodium fluoride into a three-necked flask containing 10mL oleylamine and 10mL octadecene, continue to feed nitrogen and heat To 120 ℃, keep 1h. Then it was heated slowly to 320° C. and stirred for 1 h, and then cooled to room temperature naturally. Add absolute ethanol, centrifuge to obtain a precipitate, wash with water and ethanol three times, and finally obtain upconversion nanoparticles, which are dispersed in chloroform. Finally, 1 mL of hexadecyltrimethyl bromide solution (0.1 M) was added to the chloroform solution of upconverting nanoparticles, stirred at 70° C. for 4 hours, centrifuged, washed with water, and dried to obt...
Embodiment 2
[0073] Synthesis of upconverting nanomaterials and thylakoid membrane composites with an excitation wavelength of 808 nm.
[0074] 1. Synthesis of upconversion nanoparticles:
[0075] Weigh 0.1mM rare earth acetate (wherein Y:Yb:Er:Nd=38:10:1:1) and 10mM sodium fluoride into a three-necked flask containing 10mL oleylamine and 10mL octadecene, and keep Bubble nitrogen and heat to 120°C for 1h. Then it was heated slowly to 340° C. and stirred for 1 h, and then cooled to room temperature naturally. Add absolute ethanol, centrifuge to obtain a precipitate, wash with water and ethanol three times, and finally obtain upconversion nanoparticles, which are dispersed in chloroform. Finally, 1 mL of hexadecyltrimethyl bromide solution (0.1 M) was added to the chloroform solution of upconverting nanoparticles, stirred at 70° C. for 4 hours, centrifuged, washed with water, and dried to obtain aqueous phase upconverting nanoparticles.
[0076] 2. Extraction of thylakoid membrane:
[00...
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