Process for preparing gold nano particle by using aqueous phase soft mould plate method
A soft template method and nanoparticle technology, which is applied in the field of preparing gold nanoparticles by the aqueous phase reduction process, can solve the problems of difficult product separation, easy side reactions, and easy pollution, and achieve cost reduction, less impurities, and easy operation Effect
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[0015] Example 1 SDS-PEG (PEG average molecular weight 8000) soft template to synthesize gold nanospheres.
[0016] Add a certain amount of PEG and SDS to deionized water, heat it to 40-60℃ to fully dissolve and self-assemble into soft clusters. After the solution is cooled to room temperature, mix with the aqueous solution of chloroauric acid to make the solution The final concentrations of the components are: chloroauric acid 0.1mmol / L, PEG 60g / L, and SDS 5mmol / L. After stirring for about 1 min (400r / min) at room temperature and normal pressure, react at (25±1)°C near room temperature to avoid light for 2-6 hours. After the reaction, the reaction solution was centrifuged with a high-speed centrifuge (10000 r / min) to separate the products, and the precipitate was washed three times with deionized water to obtain spherical gold nanoparticles with an average particle size of 20±5 nm.
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[0017] Example 2 SDS-PEG (PEG with an average molecular weight of 20000) soft template to synthesize gold nanosheets.
[0018] Add a certain amount of PEG and SDS to deionized water, heat it to 40-60℃ to fully dissolve and self-assemble into soft clusters. After the solution is cooled to room temperature, mix with the aqueous solution of chloroauric acid to make the solution The final concentrations of the components are: chloroauric acid 0.5mmol / L, PEG 85g / L, and SDS 10mmol / L. After stirring at room temperature and normal pressure for about 1 min (400r / min), react at (25±1)°C near room temperature to avoid light for 24-48h. After the reaction, the reaction solution was centrifuged using a high-speed centrifuge (3000 r / min) to separate the products, and the precipitate was washed three times with deionized water to obtain gold nanosheets with an average diameter of 500±50 nm.
Example Embodiment
[0019] Example 3 Synthesis of gold nanorings with SDS-PEG (PEG average molecular weight 10000) soft template.
[0020] Add a certain amount of PEG and SDS to deionized water, heat it to 40-60℃ to fully dissolve and self-assemble into soft clusters. After the solution is cooled to room temperature, mix with the aqueous solution of chloroauric acid to make the solution The final concentrations of the components are: chloroauric acid 0.3mmol / L, PEG 120g / L, and SDS 3mmol / L. After stirring for about 1 min (400r / min) at room temperature and normal pressure, react for 180-240h in the dark at (25±1)°C near room temperature. After the reaction, the reaction solution was centrifuged using a high-speed centrifuge (3000 r / min) to separate the products, and the precipitate was washed three times with deionized water to obtain gold nanorings with an average diameter of 500±50 nm.
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