The method includes adding ammonia to precipitate out the Fe ions but somehow the particles end up microscale and not nano. How do I ensure it is nano? Can anyone direct me to a link for another method to get nanocomposites of GO and Fe3O4
Ma'am,
Ammonia is used as the precipitating agent in order to adjust the pH value. It assists to the size, shape, and composition of magnetite nanoparticles that may be controlled by means of the type of salts e.g. Mohr's salt used, Fe2+ and Fe3+ ratio, pH, and ionic strength of the media. Then add Ammonia aqueous solution drop wise into the mixture slowly until the pH value of the solution reached 9. The complete precipitation reaction of Fe3O4 is generally expected between pH 9 and 14 and results in nano sized particles which can be portrayed using DLS, TEM, SEM.
Dear Medha,'
The mixing and the addition of precipitating agent plays very critical role in controlling the size so you have to be very precise here.
You can use other reduction material instead Ammonia, also the there are anther parameters play as main roles to prepare nano particles, such as time of stirrer, temperature, and PH level.
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