A kind of preparation method of core-shell magnetic/gold nanoparticles
A gold nanoparticle, nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of difficult to obtain uniformly coated particles, poor dispersion of core-shell particles, Problems such as poor dispersion of nanoparticles, to achieve green and easy preparation conditions, overcoming harsh reaction conditions, and good dispersion
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[0020] This example aims to clarify the practicability of the preparation of core-shell magnetic / gold nanocomposite particles of the present invention.
[0021] 1. Preparation of magnetic nanoparticles:
[0022] Weigh 4.1gFeCl 3 ·5H 2 O and 2.35gFeCl 2 ·6H 2 O was dissolved in a flask by adding 100ml of water. After 0.5 hours, 10ml of 30℅ammonia water was quickly added dropwise, heated to 80°C, aged for 1 hour under vigorous stirring, cooled to room temperature, magnetically separated, washed with water until the clear liquid was neutral, and the resulting product was vacuum dry.
[0023] 2. Polydopamine-modified Fe 3 o 4 Preparation of nanoparticles
[0024] Take 90mg Fe 3 o 4 Nanoparticles were added to a three-necked flask containing 180ml of Tris (pH=8.5) solution, stirred for 20 min while ultrasonically, then 360 mg of dopamine was added to the above-mentioned three-necked flask, stirred for 4 h while ultrasonically, then magnetically separated on the side, washe...
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