In this paper (DOI: 10.1002/anie.200704788 ), the authors impregnated rutile TiO2 particles with a solution of titanium tetraisopropoxide in 2-propanol (the weight ratio of anatase phase to rutile phase in the parent solution 5 wt%) and
subsequently treated for 8 h at 423 K in the presence of a flow of wet
nitrogen to hydrolyze the titanium isopropoxide. After that they calcined the system at 400 C and obtained anatase- decorated rutile particles.
I just try to figure out how did they obtain epitaxial(Figure 3 in the paper) growth of anatase(!) on rutile although the obvious epitaxial stabilization from the rutile particles must encourage the transformation amorphous TiO2- rutile TiO2. I believe that the answer is in braces and that the precursor's structure encourage transformation of titanium tetraisopropoxide to the anatase phase. However, I am confused that before the calcination at 400 C the TiO2 phase was amorphous.
So, could anyone explain this to me?
Article Importance of the Relationship Between Surface Phases and Ph...
You can get the similar or apropriate answer by searching the keyword in the GOOGLE SCHOLAR page. Usually you will get the first paper similar to your keyword.
From my experience, this way will help you a lot. If you still have a problem, do not hasitate to let me know.
Kind regards, Dr ZOL BAHRI - Universiti Malaysia Perlis, MALAYSIA
Mikhail Pylnev
The nanoparticles on the surface have an unfinished crystal lattice. If the synthesis conditions (temperature, pressure) favor the formation of another allotropic modification, then it appears.
If you are interested in details write a letter to Pugachevsky. He knows this problem.
Article Synthesis and optic properties of titanium dioxide nanostruc...
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