The synthesis of N-S co-doped polymorphic Titanium dioxide (NS-TiO2) nanoparticle was investigated in order to obtain TiO2 catalyst with visible light photocatalytic activity. NS-TiO2, containing anatase, brookite and rutile phase, was synthesized using an ambient condition sol process followed with calcination. Thiourea (5%) was added as the N and S precursor. The NS-TiO2 was characterized by X-ran diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, porosimetry analysis and UV-vis spectrophotometry. The impacts of calcination temperature and doping precursor adding sequence (beginning, middle or end of the process) were investigated to optimize the synthesis parameters for NS-TiO2 with highest activity. The photocatalytic degradation of a hepatotoxic cyanotoxin, microcystin-LR (MC-LR), under visible light irradiation was studied (at pH=5.7) to examine catalytic activity of NS-TiO2. According to the experimental results, the NS-TiO2 calcined at 300� C for 2 hours has high surface area of 132 m2/g and showed the highest photocatalytic activity that the removal rate of MC-LR increased about 4 times compared to the control (without doping, mainly adsorption) under visible light irradiation. Moreover, adding thiourea at the beginning of ambient condition sol process can obtain NS-TiO2 with higher activity.

Visible light sensitized N-S co-doped polymorphic TiO<sub>2</sub> for photocatalytic destruction of microcystin-LR

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Visible light sensitized N-S co-doped polymorphic TiO2 for photocatalytic destruction of microcystin-LR

Visible light sensitized N-S co-doped polymorphic TiO₂ for photocatalytic destruction of microcystin-LR