322
R. S. Purty et al.
Fig. 4 DLS result for suspended nanopowder
Fig. 5 Degradation of dye
the two other tubes changed to pale yellow just after adding nanopowder to it. The
second tube was kept in the dark and no color change was observed. The color
change was observed in the third tube where color of the dye changed from pale
yellow to colorless, showing that the process of dye degradation was successful by
photocatalysis under the effect of direct sunlight. This was in accordance with the
popular reports on this test for nanoparticles (Konstantinou and Albanis 2004).
3.4 Antimicrobial Test
3.4.1 Antimicrobial Effect of TiO 2 in Liquid Media
The continuous decrease in absorbance was noticed showing the decrease in bacterial
colony with all the concentrations used. There was continuous growth of bacterial
R. S. Purty et al.
Fig. 4 DLS result for suspended nanopowder
Fig. 5 Degradation of dye
the two other tubes changed to pale yellow just after adding nanopowder to it. The
second tube was kept in the dark and no color change was observed. The color
change was observed in the third tube where color of the dye changed from pale
yellow to colorless, showing that the process of dye degradation was successful by
photocatalysis under the effect of direct sunlight. This was in accordance with the
popular reports on this test for nanoparticles (Konstantinou and Albanis 2004).
3.4 Antimicrobial Test
3.4.1 Antimicrobial Effect of TiO 2 in Liquid Media
The continuous decrease in absorbance was noticed showing the decrease in bacterial
colony with all the concentrations used. There was continuous growth of bacterial