I used to prepare nanopartcles of ferrites using copreciptation method, now I need to prepare silica nanoparticles useing Sol Gel method. How to know the reatant weights to get 5 grams of nano silica?
Ahmed Massoud
You can calculate the amount of TEOS you need very easily to produce 5 g of silica. What you can’t say is that the produced silica is in the ‘nano’ (< 100 nm) state…
The formula for TEOS is Si(OC2H5)4 with molar mass of 208.33 g⋅mol−1 and 1 mole of TEOS will generate 1 mole of silica, SiO2, molar mass 60.08 g/mol. Thus to generate 5 g of silica will require [5/60.08]*208.33 g of TEOS. That is, ~ 17.34 g. Ammonium hydroxide will be used in excess to ensure all the Si(OH)x (where x is nominally 4) is precipitated and then you’ll have a calcining stage to decompose the intermediate ‘hydroxide’ gel to silica. Then you’ll need to test for ‘nano’ – SEM, DLS, XRD, and SSA are the acronyms for the tools you’ll need…
Abdelsalam Abuzreda
While the attachment is a very useful review, I would ask you to point out exactly where it allows the question 'How to calculate the weights of used TEOS, ammonium hydroxide that are used to form 5 grams of silica nanoparticles by sol gel method?' to be answered?
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