The present invention is to provide a new photocatalytic composite for by a method of manufacturing the air and water purification, antibacterial, in the green materials sector for deodorizing the application the mesopore spherical titanium dioxide / acid treatment for possible photocatalytic multi-wall composite of carbon nanotubes to, (a) preparing an ethanol, a surfactant, after the addition of the titanium precursor in the mixture solution of the potassium chloride aqueous solution, mesopores spherical titanium dioxide of synthesizing by sintering; (B) a step of supporting a multi-wall carbon nanotubes in a mixture of sulfuric acid and nitric acid, producing the acid-treated MWNT; (C) a step, and (d) the step of firing the composite material prepared in the step (c) for preparing the mesopore spherical titanium dioxide, and the acid-treated MWNT to the hydrothermal synthesis, complex. In accordance with the present invention as described above, has the effect that more absorbs light energy and at the same time rapidly adsorbed an organic substance with excellent mesopore structure is formed, the multi-walled carbon nanotubes efficiently the visible light region of the light source reduces the bandgap by enabling use, there is an effect capable of manufacturing the improved composite material is optically active.
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