Composites of TiO₂ pillared sericite: Synthesis, characterization and photocatalytic degradation of methyl orange

A series of TiO2 pillared sericite nanocomposites were prepared by the sol-gel method followed by thermal treatment. Two factors, namely sericite dosage, and calcination temperature were researched to see their effects on the structure and properties of TiO2 pillared sericite nanocomposite. X-ray diffraction and nitrogen adsorption-desorption isotherms were used to analyze the changes of crystal phase, grain size and pore structure information of the generated TiO2 nanoparticles in the composite. Among all the samples, the TiO2 pillared sericite composite calcined at 800 degrees C has the best photocatalytic properties. Trapping experiment proved that the main active species are center dot O-2(-), h(+) and center dot OH in order of participation during the photodegradation of methyl orange by the prepared composite. Sericite has a synergistic role in enhancing the photocatalytic activity of TiO2 pillared sericite nanocomposite. Good photocatalytic activity, together with its availability and good recyclability, makes sericite a promising substrate in the field of photocatalysis.