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Air pollution is a major threat to human health and the environment. The main air pollutants that come from different sources in both the indoor and outdoor environment are carbon monoxide (CO), sulfur oxides (SOX), oxides of nitrogen (NOX), volatile organic compounds (VOCs), and particulate matter (PM). Nanomaterials are capable of absorbing air pollutants from the source and they help to improve the air pollution level in the atmosphere. Air pollution from indoor and outdoor sources may be effectively managed using photocatalytic oxidation. ZnO nanoparticles were synthesized, characterized, and coated on the inside surface of a quartz tube to remove SO2 under the UV irradiation process. X-ray diffraction reveals that the average crystalline size of ZnO nanoparticles was found to be 22.63 nm. FTIR analysis for ZnO nanoparticles has shown the spectral peak at 667 cm−1 which indicates the ZnO vibrations. The particle size of ZnO nanoparticles was found to be 178.1 nm. FE-SEM analysis of ZnO nanoparticles reveals that the particles are spherical. The EDS analysis of ZnO nanoparticles confirms the presence of Zn and O. TGA/DTA analysis of ZnO nanoparticles shows that total weight loss of 10.95% and it attains stability after 800 °C. The PL spectra of ZnO NPs show an emission peak at 649 nm. The performance of prepared nanomaterial was demonstrated for the removal of SO2 generated from the source. The removal of SO2 under UV irradiation for ZnO nanoparticles was 75%. The maximum removal efficiency was achieved after 40 min of irradiation time. There is no decrease in the efficiency of the photocatalyst after three batches and it can be reused and regenerated.

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Advancements in Photocatalytic Degradation Using ZnO Nanoparticles for Sustainable Urban Air Pollution Control

  • 章节

  • 发表日期：

    2025年

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  • Kadarkarai Rajeshkumar,
  • P Andavar,
  • Ponnambalam Nirmal,
  • S Makesh Kumar

摘要

Air pollution is a major threat to human health and the environment. The main air pollutants that come from different sources in both the indoor and outdoor environment are carbon monoxide (CO), sulfur oxides (SOX), oxides of nitrogen (NOX), volatile organic compounds (VOCs), and particulate matter (PM). Nanomaterials are capable of absorbing air pollutants from the source and they help to improve the air pollution level in the atmosphere. Air pollution from indoor and outdoor sources may be effectively managed using photocatalytic oxidation. ZnO nanoparticles were synthesized, characterized, and coated on the inside surface of a quartz tube to remove SO2 under the UV irradiation process. X-ray diffraction reveals that the average crystalline size of ZnO nanoparticles was found to be 22.63 nm. FTIR analysis for ZnO nanoparticles has shown the spectral peak at 667 cm−1 which indicates the ZnO vibrations. The particle size of ZnO nanoparticles was found to be 178.1 nm. FE-SEM analysis of ZnO nanoparticles reveals that the particles are spherical. The EDS analysis of ZnO nanoparticles confirms the presence of Zn and O. TGA/DTA analysis of ZnO nanoparticles shows that total weight loss of 10.95% and it attains stability after 800 °C. The PL spectra of ZnO NPs show an emission peak at 649 nm. The performance of prepared nanomaterial was demonstrated for the removal of SO2 generated from the source. The removal of SO2 under UV irradiation for ZnO nanoparticles was 75%. The maximum removal efficiency was achieved after 40 min of irradiation time. There is no decrease in the efficiency of the photocatalyst after three batches and it can be reused and regenerated.