Gold nanorod/silver/titanium dioxide core-shell nano composite structure and preparation method thereof
A gold nanorod, nanocomposite technology, applied in nanotechnology, metal processing equipment, coatings, etc., can solve the problem that the thickness of silver and titanium dioxide shells is not easy to control.
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[0020] (1) Preparation of gold nanorods / mesoporous titanium dioxide: you can refer to the prior art, such as: first, use seed growth method to prepare gold nanorods, take 1-10 mL of hexadecyltrimethyl bromide prepared by seed method Ammonium (CTAB)-stabilized gold nanorods were centrifuged twice at 5,000-10,000 rpm for 5-20 min each. Remove the supernatant, add 0.1-1 mL of deionized water to the centrifuged solid to disperse to obtain a volume-concentrated gold nanorod colloidal solution; take 5-75 μL of the concentrated gold nanorod colloidal aqueous solution, add 40-400 μL of water to disperse, Then add 2-20μL of 0.01mol / L cetyltrimethylammonium bromide aqueous solution, 1-20μL of 0.01-0.1mol / L sodium hydroxide aqueous solution and 3-300μL of 0.01mol / L L of ethanol solution of bis(acetylacetonyl)diisopropyltitanate (TDAA), the reaction system was kept in a state of vibration or magnetic stirring during the addition; the reaction was performed at room temperature for 1-10h to...
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[0024] 1) Preparation of gold nanorods / mesoporous titanium dioxide: The preparation of gold nanorods / mesoporous titanium dioxide samples can refer to the prior art. First, gold nanorods can be prepared by seed growth method. The gold nanorods stabilized by alkyl trimethyl ammonium bromide (CTAB) were centrifuged twice at 8000 rpm for 20 min each. Remove the supernatant, add 1 mL of ionized water to the centrifuged solid to disperse to obtain a concentrated gold nanorod colloidal aqueous solution; take 75 μL of the concentrated gold nanorod colloidal aqueous solution, add 400 μL of water to disperse, and then sequentially add 20 μL to a concentration of 0.01 mol / L of cetyltrimethylammonium bromide aqueous solution, 2 μL of 0.1 mol / L sodium hydroxide aqueous solution and 100 μL of 0.01 mol / L bis(acetylacetonyl)diisopropyl titanate Ethanol solution, the reaction system kept vibrating or magnetic stirring state during the addition, and reacted at room temperature for about 2 hour...
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