Studying of photodegradation of prepared azo-dyes by tio2

الملخص EN

The work consists of two parts.

The first deals with the preparation of some mono azo dyes : 4- phenyl azo–α–fluoro phenol (BAFP), 4–phenyl azo–α–chloro Benzoic acid (BACB), 4- phenyl azo–α– methyl phenol (BAMP).

The prepared compounds have been identified by FT-IR, and UV-Visible absorption spectroscopy The second part consists of photo degradation of the azo compounds mentioned above at lab temperature in presence and absence of titanium dioxide (anatine) as suspension by exposure of aqueous solution of dyes using light from a 150 w lamp with wavelength 350-800 nm.

Generally it has been found that the rates of photo degradation of three dyes were higher in presence of TiO2 suspension.

In this paper some physicochemical properties of the dyes, such as the electron donor or electron–withdrawing character of dyes have been employed to assess their photo degradability.

The results of photo degradation of all dyes illustrate that the rate of the degradation process depends on the conc.

Of TiO2, and physicochemical properties of the dyes.