The photocatalytic degradation of orange g by using cds tio2 as an available configuration

الملخص EN

CdS/TiO2 hetrojunctions were prepared by direct mixture of both constituents and by precipitation of the sensitizer with commercial TiO2 at different concentrations.

UV.–Vis.

Spectroscopy analysis showed that the junction – based CdS are able to absorb a large part of visible light ( respectively up to 800 and 600 nm ).

This fact was confirmed by photocatalytic experiment performed under visible light .

A part of charge recombination that can take place when semiconductor is excited was observed when photo catalytic experiment was performed under uv-vis illumination .

Orange G was used as a pollutant compound .

photo activity of the junctions was found to be strongly dependent on the substrate .

By using medium pressure mercury lamp (MPML) in 125 watt .

Photocatalyst experiment was also done under uv-vis illumination to establish the behaviour of the junction in real solar irradiation conditions and to observe apart of election – hole recombiration that can take plae under this conditions