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Polyaniline(PANI) composite nanotubes(90-130 nm in diameter) containing titanium dioxide(TiO 2) nanoparticles(about 10 nm in diameter) were synthesized through a self-assembly process in the presence of a-naphthalenesulfonic acid(a-NSA) as the dopant. It was found that PANI-TiO 2 composites and PANI nanotubes both behaved with significant photocatalytic activities towards AZO dyes, during 2 h photocatalytic processes under natural light, the degradation ratio was 94.2% and 97.2% respectively(methyl orange and orange II). The morphology of such products was characterized by SEM. The specifi c surface area of such composite nanotubes was 14.7 m2/g compared to normal polyaniline which was 0.27 m2/g. IR and X-ray diffraction characterizations showed that the chemical chain of the composite nanotubes was identical to that of the doped PANI. It may provide a new way for photodegradation of organic contaminants by using conjugated polymer with dimensional structure.
Polyaniline (PANI) composite nanotubes containing titanium dioxide (TiO 2) nanoparticles (about 10 nm in diameter) were synthesized through a self-assembly process in the presence of a-naphthalenesulfonic acid (a-NSA) as the dopant. It was found that PANI-TiO 2 composites and PANI nanotubes both behaved with significant photocatalytic activities towards AZO dyes, during 2 h photocatalytic processes under natural light, the degradation ratio was 94.2% and 97.2% respectively (methyl orange and orange II). The morphology of such products was characterized by SEM. The specific surface area of such composite nanotubes was 14.7 m2 / g compared to normal polyaniline which was 0.27 m2 / g. IR and X-ray diffraction characterizations showed that the chemical chain of the composite nanotubes was identical to that of the doped PANI. It may provide a new way for photodegradation of organic contaminants by using conjugated polymers with dimensional structure.