Molecular oxygen activation: Innovative techniques for environmental remediation

Area of Science:

• Environmental Chemistry
• Advanced Oxidation Processes
• Green Chemistry

Background:

• Molecular oxygen offers a sustainable, non-toxic, and cost-effective alternative to traditional oxidants for pollutant degradation.
• Advanced oxidation processes (AOPs) are crucial for environmental remediation, with molecular oxygen activation emerging as a key strategy.
• The activation of molecular oxygen generates highly reactive oxygen species (ROS), enhancing pollutant degradation efficiency and minimizing environmental impact.

Purpose of the Study:

• To provide a comprehensive review of the principles, mechanisms, and diverse ROS production pathways in molecular oxygen activation.
• To detail contemporary activation approaches, including photocatalytic, electrocatalytic, piezoelectric, and photothermal methods.
• To explore the applications of molecular oxygen activation in degrading water pollutants, air pollutants, and volatile organic compounds (VOCs).

Main Methods:

• Review of scientific literature on molecular oxygen activation principles and mechanisms.
• Detailed analysis of various activation techniques: photocatalysis, electrocatalysis, piezoelectricity, and photothermal activation.
• Examination of degradation pathways and mechanisms for different types of pollutants.

Main Results:

• Diverse ROS generation pathways are elucidated through various activation methods.
• Photocatalytic, electrocatalytic, piezoelectric, and photothermal activation demonstrate distinct and effective pollutant degradation capabilities.
• Significant potential shown for treating water pollutants, air pollutants, and VOCs.

Conclusions:

• Molecular oxygen activation is a highly adaptable and energy-efficient technology for sustainable environmental remediation.
• The review highlights challenges and opportunities, emphasizing the need for continued research and innovation in this field.
• This approach promises significant advancements in environmental protection and beyond.