I tried to make AgNP by mixing AgNO3 and 1% sodium citrate two times.
In the first trial, there was no problem to make AgNP, but in the second trial
there were some floating matters like eraser debris on the surface of the AgNO3 & Sodium citrate mixture in the beaker. Also the yield of AgNP is lower than the first trial. There was no difference between the first and second trial about the protocol.
(I used the same beaker of the first trial for the second trial after washing)
Who can teach me why the floating matters occurs sometimes when mixing AgNO3 and sodium citrate?
(Sorry for my poor english)
Hello,
I assume that the glassware or water contained some impurities. I suggest to use MQ water for solutions preparation. I studied the mechanism of silver complex formation and AgNPs under varios conditions Article Green synthesis of silver nanoparticles using paper wasp‘s h...
Thank you for kind reply. Your answer is so helpful for my experiment. I wish u have a nice day.
Dmitriy Berillo
Another possibility is that those debris were actually Ag nanoparticles agregated together. In this case they lose their solubility and that is why your yield is lower. This is either caused by a lack of citrate, a bad pH range or the presence of salts that compensate surface charges.
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