Abstract
A sandwich-structured polyaniline/titania (PANI/Ti0.91O2) hybrid has been successfully fabricated by a facile electrostatic self-assembly technique. Compared with the traditional monomers intercalation methods, casual change in the content of PANI satisfies for obtaining optimum photocatalytic property. The structural characteristics accurately record that PANI nanoparticles were incorporated into the Ti0.91O2 nanosheets interlayer forming sandwich-like structure and the height of gallery is expanded about 11 times. As indicated, sandwich-like structure is pivotal for achieving maximum utilization of light. On the other hand, the optical analyses find that introducing PANI with Ti0.91O2 extends optical absorption into the range of visible-light and hinders photogenerated charge recombination effectively. The PANI/Ti0.91O2 hybrids exhibit a remarkable photocatalytic activity under visible-light irradiation. Finally, the mechanism of the enhancing photocatalytic activity is discussed. De-ethylation and degradation of chromophores is observed in the RhB-hybrids system. It is hoped that the present work may provide an efficient and applicable method to develop photocatalysts with excellent performance.
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