Our research develops advanced photocatalytic materials for air purification, greenhouse gas conversion, and environmental remediation. By harnessing solar and visible light, we design semiconductor-based catalysts to remove atmospheric pollutants (NOx, SOx), convert CO₂ into value-added fuels, and degrade harmful contaminants, supporting Sustainable Development Goals (SDGs 3, 11, and 13).
      We focus on heterojunction semiconductors, plasmonic nanostructures, defect engineering, and waste-derived catalysts to enhance light absorption, charge separation, and catalytic efficiency. Systems based on TiO₂, ZnO, MgO, Bi₂S₃, and g-C₃N₄—modified with Ag nanoparticles, carbon quantum dots, or recycled materials—have demonstrated high pollutant removal under visible or solar irradiation. For example, several composites achieved 75–90% NO removal, while ZnO-based nanostructures reached up to 78.8% under solar light. Waste-derived catalysts also showed strong performance, achieving up to 90.3% selective NOx removal at moderate temperatures.
       Beyond efficiency, our work emphasizes low byproduct formation and long-term stability. Optimized systems suppressed toxic NO₂ formation to below 5%, with plasma-treated membranes producing as little as 0.46% NO₂, and most catalysts retained over 90% activity after repeated cycles. Mechanistic studies revealed that reactive oxygen species (•O₂⁻ and •OH) drive oxidation pathways, while plasmonic effects and Z-scheme charge transfer significantly improve performance.
       In addition to air pollution control, ongoing projects explore photocatalytic CO₂ reduction into fuels and the treatment of emerging contaminants, aiming to develop scalable solutions for clean energy and environmental protection.
       Highlights of our work:
       • Visible-light removal of NOx and SOx for clean air applications
       • Photocatalytic conversion of CO₂ into value-added fuels
       • NO removal efficiencies up to 90% under solar/visible light
       • Ultra-low toxic byproduct formation (NO₂ < 0.5% in optimized systems)
       • Durable catalysts with minimal performance loss over repeated use
       Our photocatalytic technologies provide sustainable, energy-efficient solutions for air purification, climate mitigation, and resource recovery.

RESEARCH RESULTS FIGURES