GO-TiO₂ as a Highly Performant Photocatalyst Maximized by Proper Parameters Selection

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Titanium dioxide (TiO2) is a well-established photocatalyst.
• Graphene oxide (GO) can enhance TiO2 properties.
• Developing efficient photocatalysts is crucial for environmental remediation.

Purpose of the Study:

• To synthesize and characterize a novel graphene oxide-coupled TiO2 (GO-TiO2) photocatalyst.
• To compare the performance of GO-TiO2 with commercial TiO2 (P25).
• To optimize reactor conditions for enhanced pollutant degradation.

Main Methods:

• Synthesis of GO-TiO2 nanocomposite.
• Physical-chemical characterization using FTIR, XRD, N2 isotherms, and electrochemical measurements.
• Photocatalytic degradation experiments using methylthioninium chloride (MC) as a model pollutant.

Main Results:

• GO-TiO2 exhibited high porosity, suitable charge transport, and high electron mobility.
• Optimized reactor setup (irradiated area, lamp distance) improved degradation efficiency.
• The GO-TiO2 catalyst demonstrated effective degradation of MC and potential for reuse with H2O2 addition.

Conclusions:

• The novel GO-TiO2 photocatalyst shows enhanced performance compared to commercial TiO2.
• Reactor design significantly impacts photocatalytic efficiency.
• GO-TiO2 presents a viable, energy-efficient option for treating model pollutants in water, warranting further research.