Novel TiO₂/C nanocomposites: Synthesis, characterization, and application as a photocatalyst for the degradation of organic pollutants
2012
da Costa, Elias | Zamora, Patricio P. | Zarbin, Aldo J.G.
Novel TiO₂/carbon nanocomposites were prepared through the pyrolysis of TiO₂/poly(furfuryl alcohol) hybrid materials, which were obtained by the sol–gel method, starting from titanium tetraisopropoxide (TTIP) and furfuryl alcohol (FA) precursors. Six different TiO₂/C samples were prepared based on different TiO₂ nanoparticle sizes and TiO₂/FA ratios. All of the samples were characterized using X-ray diffraction, infrared, and Raman spectroscopy. The results indicated effective FA polymerization onto the TiO₂ (anatase) nanoparticles, polymer conversion to disordered carbon following the pyrolysis, and a simultaneous TiO₂ anatase–rutile phase transition. The resulting TiO₂/carbon composites were used as photocatalysts in the advanced oxidative process (AOP) for the degradation of reactive organic dyes in aqueous solution. The results indicate excellent photocatalytic performance (degradation of 99% of the dye after 60min) with several advantages over traditional TiO₂-based photocatalysts.
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