Impact of TiO₂ Nanotubes' Morphology on the Photocatalytic Degradation of Simazine Pollutant.

There are various approaches to enhancing the catalytic properties of TiO₂, including modifying its morphology by altering the surface reactivity and surface area of the catalyst. In this study, the primary aim is to enhance the photocatalytic activity by changing the TiO₂ nanotubes' architecture. The highly ordered infrastructure is favorable for a better charge carrier transfer.

Controlled acid catalyzed sol gel for the synthesis of highly active TiO-chitosan nanocomposite and its corresponding photocatalytic activity.

For the synthesis of a highly active TiO-chitosan nanocomposite, pH plays a crucial role towards controlling its morphology, size, crystallinity, thermal stability, and surface adsorption properties. The presence of chitosan (CS) biopolymer facilitates greater sustainability to the photoexcited electrons and holes on the catalysts' surface. The variation of synthesis pH from 2 to 5 resulted in different physico-chemical and photocatalytic properties, whereby a pH of 3 resulted in TiO-chitosan nanocomposite with the highest photocatalytic degradation (above 99 %) of methylene orange (MO) dye.