Effect of transition metal ions on photocatalytic activity of ZnO in bleaching of some dyes |
| |
| Authors: | Suruchi Bhandari Jitendra Vardia R K Malkani |
| |
| Institution: | Department of Chemistry, Solar Energy and Photochemistry Laboratory, University College of Science , M. L. Sukhadia University , Udaipur 313002, Rajasthan, India |
| |
| Abstract: | The photocatalytic bleaching of some dyes (erythrosin-B, fast green FCF and eosin Y) was carried in the presence of semiconducting zinc oxide and was observed spectrophotometrically. The effects of various operating variables like pH, concentration of dyes, amount of semiconductor and light intensity on the efficiency of the reaction were also observed. Attempts have been made to study the effect of the addition of other metal ions (Fe2+, Ni2+, Ag+, Cu2+, Co2+, V2+ and Mn2+). All the added metal ions increase the reaction rate to some extent. It was also observed that Fe2+ is most effective in photobleaching of erythrosin-B, whereas V2+ is more effective in the cases of fast green FCF and eosin Y. A tentative mechanism has been proposed. |
| |
| Keywords: | Photodegradation photocatalytic bleaching zinc oxide anionic dyes |
|
|
