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Composites TiO2-Hydrotalcite were prepared from synthesized TiO2 using titanium i) isopropoxide, ii) titanium butoxide and hydrotalcites Mg/AlCO32– obtained by the sol - gel method. Adsorption-desorption isotherms from N2 were obtained to determine BET surface area, volume and average diameter for pore. Surface fractal dimension determination has been a powerful tool to describe the roughness and...