Ti02nanopowders, single and double doped with Ag and Cu, were prepared using the sol-gel method, with titanium isopropoxide as the precursor. The synthesised samples were caIcinedat various temperatures and characterised by XRD, Raman and SEM techniques. The results suggests that the co doped Ti02 powders are constituted by anatase and brookite phases while in the case of pure and singly doped samples only anatase is observed. The co-existence of brookite with anatase in the co-doped sample is thought to be responsible for the enhancement of anatase to rutile transformation.

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