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In this paper, Polyaniline/titanium nanotube composites (PANI/TNT) has been prepared by the hydrothermal method and in situ polymerization method.The result was showed that PANI/TNT specific surface area of the composite material is about 4 times than the pure TiO2.In addition, UV-vis results were showed that the PANI/TNT composites not only can strongly absorb the UV light but also can absorb the visible light, whereas the TiO2 can absorb the UV light.