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Title

SYNTHESIS AND CHARACTERIZATION OF ALUMINA-SUPPORTED M (II) COMPLEXES (M=NI, CU AND ZN) AS NEW HETEROGENEOUS PHOTO-CATALYSTS FOR DEGRADATION OF ORGANIC DYES

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Abstract

 IN THIS STUDY, THE NI(II), CU(II) AND ZN(II) COMPLEXES WITH BIS(2-AMINOPHENOL), WERE SYNTHESIZED AND CHARACTERIZED BY FT-IR, ABSORPTION SPECTROSCOPIES, THERMO GRAVIMETRIC ANALYSIS (TG/DTA) AND MAGNETIC SUSCEPTIBILITY [1-3]. RESULTS OF MAGNETIC SUSCEPTIBILITY REVEALED NI (AMPH)2 AND CU (AMPH)2 ARE PARAMAGNETISM AND ZN(AMPH)2 IS DIAMAGNETISM. FOR THE PREPARATION OF THE CATALYSTS ALUMINA WAS ACTIVATED BY TREATMENT AT 500°C FOR 8 H.THEN, THE ALUMINA-SUPPORTED CATALYSTS WERE PREPARED (WITH 10% WEIGH) (SCHEME 1) AND WERE CHARACTERIZED BY FT-IR, ABSORPTION SPECTROSCOPIES AND THERMO GRAVIMETRIC ANALYSIS (TG/DTA). IN CHEMISTRY, PHOTO CATALYSIS IS THE ACCELERATION OF A PHOTOREACTION IN THE PRESENCE OF A CATALYST. IN CATALYSED PHOTOLYSIS, LIGHT IS ABSORBED BY AN ADSORBED SUBSTRATE. IN PHOTO GENERATED CATALYSIS, THE PHOTO CATALYTIC ACTIVITY (PCA) DEPENDS ON THE ABILITY OF THE CATALYST TO CREATE ELECTRON–HOLE PAIRS, WHICH GENERATE FREE RADICALS (E.G. HYDROXYL RADICALS: •OH) ABLE TO UNDERGO SECONDARY REACTIONS. THE PHOTO CATALYTIC PROPERTIES OF M (II) COMPLEXES AND THEIR ALUMINA-SUPPORTED SURVEY FOR METHYL ORANGE DYE IN 10-5 M AQUEOUS SOLUTION UNDER SUNLIGHT AND LAMP [4-5].

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