--h+ recombination. Synergism exists between the roles of Chit and Ppy and as a result the ternary system exhibits remarkably higher photoactivity in visible region. Keywords: Chitosan-Polypyrrole-TiO2; Three Component System; Photodegradation; Visible Light; Methylene Blue -Journal of Advanced Chemical Sciences" /> --h+ recombination. Synergism exists between the roles of Chit and Ppy and as a result the ternary system exhibits remarkably higher photoactivity in visible region.">
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Article – Journal of Advanced Chemical Sciences

Journal of Advanced Chemical Sciences, Volume 1,Issue 3,2015 Pages 107-109


Synthesis and Characterization of A Novel Ternary Photoactive Chitosan-Polypyrrole-TiO2 System for Visible Light Photocatalytic Application
C. Murugan, E. Subramanian*

A series of novel three component photocatalytic system consisting of bio-polymer chitosan (Chit), organic conducting polymer polypyrrole (Ppy) and UV active TiO2 were designed and synthesized by varying the proportions of Chit and Ppy with respect to TiO2. The synthesized materials were characterized for their elemental and morphological behaviour using different instrumental techniques like FTIR, XRD, CHN, diffuse reflectance spectra and SEM analysis. The ternary catalysts exhibit enhanced photodegradation efficiency in methylene blue dye degradation under visible light than the binary counterparts (Chit-TiO2 and Ppy-TiO2) and bare anatase TiO2, the efficiencies being 86.4%, 67.2%, 72.8% and 58.6% respectively. Ppy photosensitizes TiO2 in the visible region while Chit enhances the photoactivity of TiO2 by adsorbing more dye molecules and thus inhibiting e--h+ recombination. Synergism exists between the roles of Chit and Ppy and as a result the ternary system exhibits remarkably higher photoactivity in visible region.
Keywords: Chitosan-Polypyrrole-TiO2; Three Component System; Photodegradation; Visible Light; Methylene Blue