A Comprehensive Review on Modification of Titanium Dioxide-Based Catalysts in Advanced Oxidation Processes for Water...

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Increasing water pollution necessitates advanced wastewater treatment strategies.
• Advanced oxidation processes (AOPs) are crucial for mineralizing trace organic contaminants.
• Titanium dioxide (TiO2) is a promising catalyst for AOPs due to its photocatalytic activity and stability.

Purpose of the Study:

• To review methods for enhancing titanium dioxide (TiO2) catalytic performance in water purification.
• To address the limitations of TiO2, such as its large band gap and low conductivity.
• To promote efficient removal of refractory organic contaminants.

Main Methods:

• Review of literature on modifying TiO2 catalysts for AOPs.
• Analysis of strategies coupling sulfate radical-based AOPs with photocatalysis or electrocatalysis.
• Examination of TiO2's properties including photocatalytic activity, durability, and stability.

Main Results:

• TiO2 exhibits high photocatalytic activity, durability, and chemical stability for water purification.
• Coupling TiO2 with other AOPs enhances the removal of persistent organic pollutants.
• Limitations like large band gap energy and low electrical conductivity require mitigation.

Conclusions:

• Enhancing TiO2 catalytic performance is key to efficient wastewater treatment.
• Modified TiO2 catalysts offer a viable solution for mineralizing trace organic contaminants.
• Further research into TiO2 modification will improve water purification technologies.