Preparation method for graphene oxide-TiO2-hypocrellin A three-component compound system and application thereof in photodynamic therapy
A technology of hypocrellin A and ternary compounding, which is applied in the field of photosensitizers, can solve the problems of poor water solubility, inability to realize tumor treatment, difficulties, etc., and achieve the effects of simple preparation method, enhanced visible light response ability, and improved system activity
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[0027] A kind of graphene oxide-TiO 2 -The preparation method of Hypocretin A ternary composite system, the steps are as follows:
[0028] 1) Under the condition of vigorous stirring, use a strong oxidizing agent (such as H 2 SO 4 ,KMnO 4 ,NaNO 3 , and H 2 O 2 )oxidised graphite. The sample uses Millipore containing 3% hydrochloric acid TM After washing in water, a negatively charged GO aqueous solution was obtained, which was rich in -OH and -COOH on the surface.
[0029] 2) Stir 15 mL of methanol, 100 μL of anhydrous acetic acid and 200 μL of tetrabutyl titanate evenly, add distilled water dropwise to start the hydrolysis process, and the reaction lasts for 20 h. The product was dialyzed against water for 24 hours using a 12-14KDa dialysis bag to obtain positively charged TiO on the surface 2 Aqueous solution of nanoparticles.
[0030] 3) HA (DMSO solubilization) and step 1) prepared GO in Millipore TMMix in water, shake at constant temperature (20°C) for 24 hours...
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