Method for preparing polypodia shaped Au nanoparticle using microwave to promote water phase soft template
A technology of gold nanoparticles and soft template method, which is applied in the field of preparing polypod-shaped gold nanoparticles by microwave-promoted water-phase soft template method, can solve the problems of wide particle size distribution of gold nanoparticles, difficult product separation, long reaction time and the like, To achieve the effect of easy product separation, cost reduction and easy operation
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Embodiment 1
[0012] Embodiment 1SDS-PVP (average molecular weight 8000) soft template synthesis multipod shape gold nanoparticle
[0013] Add a certain amount of SDS and PVP into deionized water, heat to 40-60°C to fully dissolve and self-assemble into soft clusters, after the solution is cooled to room temperature, mix this solution with an aqueous solution containing chloroauric acid, The final concentration of each component in the solution is respectively: 0.6mmol / L of chloroauric acid, 0.1mmol / L of PVP, and 0.3mmol / L of SDS. Heat above-mentioned solution to boiling, then add the sodium citrate aqueous solution of 8.5mmol / L rapidly, the molar ratio of chloroauric acid and sodium citrate is 1: 17, and after stirring about 10s (400r / min), put into microwave field ( 200W) and heated for 4min to carry out the reduction reaction. After the reaction, the reaction solution was centrifuged with a high-speed centrifuge (10,000 r / min) to separate the product, and the precipitate was washed thre...
Embodiment 2
[0014] Embodiment 2SDS-PVP (average molecular weight 360000) soft template synthesis multipod shape gold nanoparticle
[0015] Add a certain amount of SDS and PVP into deionized water, heat to 40-60°C to fully dissolve and self-assemble into soft clusters, after the solution is cooled to room temperature, mix this solution with an aqueous solution containing chloroauric acid, The final concentration of each component in the solution is respectively: 1mmol / L of chloroauric acid, 10mmol / L of PVP, and 12mmol / L of SDS. Heat the above solution to boiling, then quickly add 8.5mmol / L sodium citrate aqueous solution, the molar ratio of chloroauric acid and sodium citrate is 1: 10, and after stirring for about 10s (400r / min), put into the microwave field ( 1000W) to heat for 1min for reduction reaction. After the reaction, the reaction solution was centrifuged with a high-speed centrifuge (10,000 r / min) to separate the product, and the precipitate was washed three times with water to ...
Embodiment 3
[0016] Embodiment 3SDS-PVP (average molecular weight 40000) soft template synthesis multipod shape gold nanoparticle
[0017] Add a certain amount of SDS and PVP into deionized water, heat to 40-60°C to fully dissolve and self-assemble into soft clusters, after the solution is cooled to room temperature, mix this solution with an aqueous solution containing chloroauric acid, The final concentration of each component in the solution is respectively: 0.3mmol / L of chloroauric acid, 5mmol / L of PVP, and 6mmol / L of SDS. Heat the above solution to boiling, then quickly add 8.5mmol / L sodium citrate aqueous solution, the molar ratio of chloroauric acid and sodium citrate is 1: 30, and after stirring for about 10s (400r / min), put into the microwave field ( 500W) to heat for 2.5min for reduction reaction. After the reaction, the reaction solution was centrifuged in a high-speed centrifuge (10,000 r / min) to separate the product, and washed with water three times to obtain multipod-shaped...
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