Water disinfection through photoactive modified titania

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Science

Background:

• Titanium dioxide (TiO2) is a photocatalyst with potential for water disinfection.
• Improving TiO2's efficiency and expanding its light absorption range are crucial for practical applications.

Purpose of the Study:

• To synthesize and characterize nitrogen- and sulfur-doped titanium dioxide (N-TiO2 and S-TiO2) nanoparticles.
• To evaluate the enhanced water disinfection capabilities of doped TiO2 under UV/UV-Visible light.

Main Methods:

• Synthesis of TiO2, N-TiO2, and S-TiO2 via chemical methods.
• Characterization using XRD, XPS, Raman, UV-Vis, FE-SEM, and TEM.
• Assessment of water disinfection efficacy under controlled light irradiation.

Main Results:

• All samples exhibited a single anatase phase; sulfur doping decreased crystallinity, while nitrogen doping did not.
• Nitrogen and sulfur doping shifted the UV-Vis absorption edge to the visible region.
• Doping with nitrogen and sulfur enhanced water disinfection, with N-TiO2 showing the highest efficacy.

Conclusions:

• Nitrogen and sulfur doping effectively enhance the photocatalytic water disinfection properties of TiO2.
• N-TiO2 demonstrates superior performance compared to S-TiO2 and undoped TiO2.
• The findings suggest potential for doped TiO2 in advanced water purification technologies.