ZnO Nanoparticles Embedded in Chitosan Hydrogels for Enhanced Photocatalytic Wastewater Treatment
Subject Areas :الهام خلج کریمی 1 , عهدیه امجدی 2
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Abstract :
Water pollution caused by resistant chemicals such as dyes, antibiotics, and pesticides is a significant global environmental challenge. Traditional treatment methods often face substantial limitations in fully eliminating these pollutants. Among the innovative solutions, photocatalysts have gained considerable attention for their efficiency in degrading organic and resistant pollutants. Zinc oxide (ZnO) and titanium dioxide (TiO₂) stand out among photocatalysts due to their exceptional optical, chemical, and catalytic properties. However, ZnO suffers from challenges such as low visible light absorption, rapid electron-hole recombination, and limited stability, which restrict its efficiency. This study explores various synthesis techniques and doping strategies to improve ZnO’s photocatalytic performance and enhance its visible light sensitivity. Furthermore, the integration of ZnO with chitosan-based hydrogels is proposed as a novel and eco-friendly approach to overcoming these limitations. These hydrogels, featuring high pollutant adsorption capacity, biocompatibility, and enhanced stability, play a crucial role in boosting ZnO’s performance. The results demonstrate that combining ZnO with chitosan hydrogels significantly enhances the degradation efficiency of organic pollutants and offers a sustainable strategy for reducing water pollution. This innovative approach provides a practical and environmentally friendly solution for addressing water contamination and holds potential for application in industrial and municipal wastewater treatment systems.
