Composite layers composed of Ti0 2 powder and amorphous Si0 2 were coated on glass substrate. Firing these composite layers at 300-500°C did not influence the crystal structure of Ti0 2 : the concentration of anatase TI0 2 was almost the same as before firing. However, the firing process has influenced the microstructure of these composite layers. Firing them at 300-500°C for 3 hours has resulted in the highest concentration of Ti0 2 that was exposed to outside on the surface and the highest photocatalytic activity ofTi0 2 within the experimental range studied in this work.
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