mesoporous titanium dioxide nanoparticles: synthesis, characterization and application as photocatalyst for removing of phenazopyridine

The mesoporous titanium dioxide nanoparticles were successfully prepared via a sol–gel method using cetyltrimethyl ammonium bromide (ctab) as a soft template. the obtained samples were characterized by powder x-ray diffraction (pxrd), scanning electron microscopy (sem), n2 adsorption/desorption analysis, ftir and uv–visible spectroscopies. the obtained results reveal that the all samples have anatase phase, spherical morphology and the mean size value less than 50 nm. with increasing the molar ratio of ctab/titanates up to 1:5, the particle size decreases and the specific surface area increases. the performance of the synthesized nano-photocatalysts was measured by photocatalytic removal of phenazopyridine using uv irradiation light by 15 w (uv–c) mercury lamp emitted around 254 nm. the findings confirm that the photocatalytic activity of tio2 nanoparticles strongly is depends on the physical properties such as size and specific surface area. when the particle size is about 28 nm, the highest photocatalytic activity is observed.

Mesoporous Titanium Dioxide Nanoparticles: Synthesis, Characterization and Application as Photocatalyst for Removing of Phenazopyridine

The mesoporous titanium dioxide nanoparticles were successfully prepared via a sol–gel method using cetyltrimethyl ammonium bromide (CTAB) as a soft template. The obtained samples were characterized by powder Xray diffraction (PXRD), scanning electron microscopy (SEM), N2 adsorption/desorption analysis, FTIR and UV–visible spectroscopies. The obtained results reveal that the all samples have anatase phase, spherical morphology and the mean size value less than 50 nm. With increasing the molar ratio of CTAB/titanates up to 1:5, the particle size decreases and the specific surface area increases. The performance of the synthesized nanophotocatalysts was measured by photocatalytic removal of phenazopyridine using UV irradiation light by 15 W (UV–C) mercury lamp emitted around 254 nm. The findings confirm that the photocatalytic activity of TiO2 nanoparticles strongly is depends on the physical properties such as size and specific surface area. When the particle size is about 28 nm, the highest photocatalytic activity is observed.