Which is the best reducing agent to be used in synthesizing Nano alumina?

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Alan F Rawle

Sachin K C

Ammonia is not a reducing agent. It's a pH modifier and stabilizer (in certain conditions e.g. Ag(NH3)+) for the precursor.

John Clarkson

I'm no expert in nano Al particle formation, however, two papers may be of help:

Article Reduction Rate as a Quantitative Knob for Achieving Determin...

and

Article Synthesis of Colloidal Metal Nanocrystals: A Comprehensive R...

https://www.researchgate.net/profile/John_Clarkson6/post/Apart_from_Sonication_which_is_the_best_way_to_reduce_size_of_nano-particles_during_synthesis/attachment/5d7f6d5dcfe4a7968dcbc9a9/AS%3A803715674030080%401568632157119/download/Synthesis+of+Colloidal+Metal+Nanocrystals+A+Comprehensive+Review+on+the+Reductants.pdf