Sciencemadness Discussion Board

Thin films

niks1988neo - 2-5-2012 at 05:01

I want to deposit V2O5 over glass slide....and all i have is V2O5 powder....but the problem here is that i want to deposit by SOL GEL method....and i am confused over which solvent to use for dissolving acids please....

aaparatuss - 2-5-2012 at 15:26

if you find success please post it, as catalytic films are valuable.

i might try sintering the V205 at 900

scottaleger - 29-5-2012 at 03:03

got success or no ?

Zan Divine - 3-6-2012 at 10:16

The sol gel process is not simply a matter of dissolving V2O5 and evaporating a solution, even if you had a solvent.

Sol gel is a subtle, stepwise transition quite different from simple evaporation, sintering, etc.

The sol gel process depends on appropriately functionalized atoms, like the Si in tetraethylorthosilicate. These alkoxy derivatives are slowly hydrolyzed, often with a templating agent added in, to form 3 dimensional structures. Through successive dehydrations and condensations and then by a final heat treatment, the lattice approaches SiO2 but maintains internal structure.

Vanadium tetrabutoxide is what you need to make VO2 films. You won't get there easily from V2O5.

[Edited on 3-6-2012 by Zan Divine]