Jornal de termodinâmica e catálise
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Degradation of Congo Red Solution by Zinc Oxide/Silver Composite Preheated at Different Temperatures

Amjed Mirza Oda, Salih Hadi Kadhum, Ahmed Salih Farhood and Hussain Abdul alkadhum

Zinc oxide-silver composite was prepared by photodeposition process. The composite was treated with different temperature 373, 573 and 773 Ko. Characterization the catalysts by XRD and FTIR analysis was studied. All the analysis showed the modification of zinc oxide surface after doping. The XRD analysis showed Ag2O was the only phase found with ZnO at 373 Ko while Ag metal was formed after heat treatment. Photocatalytic degradation was tested for all prepared catalyst compared with ZnO. The photocatalytic degradation tested by using congo red dye and the process was efficient in sun light without focusing and the reaction last 50 minutes of time and loading was 1 gm./L. The sequence of Photocatalytic efficiency was ZnO/Ag 373> ZnO> ZnO/Ag 573 > ZnO/Ag 773.