Titanium butoxide and Titanium isopropoxide are the best precursor but they should be handled in isolated atmosphere with lower humidity.

Titanium isopropoxide !!!

Hello sir, 

The spray pyrolysis technique for TiO2 mostly uses organometallic compounds as precursors, such as titanium tetra-ethoxide, titanium iso-propoxide, and titaniumacetyl-acetonate.

Hi,

I used aqueous solution of titanium isopropoxide so no need to use controlled atmospheres. See my publication

Optical properties of TiO2 thin films prepared by chemical spray pyrolysis from aqueous solutions.

DOI: 10.1002/pssc.200982895

Titanium isopropoxide