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Silver Doped TiO2 Photocatalyst for Disinfection ofE. coli and Microplastic Pollutant Degradation in Water
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Researchers developed a silver-doped titanium dioxide photocatalyst that could simultaneously kill E. coli bacteria and break down polyethylene microplastics in water under light exposure. This combined disinfection and plastic degradation capability could be useful in water treatment systems.
Present study report the synthesis of Ag/TiO2 catalyst to study its ability to disinfect the pathogenic microorganisms and degrade into micropollutants in water. The Ag/TiO2 was synthesized by photoassisted deposition (PAD) method. The ratio of silver dopant varied (1%, 3% and 5%) to the total weight of the composite. The SEM-EDX, UV-Vis DRS and XRD techniques were used to characterize and determine the influence of silver dopant on the TiO2 structure. In this study, the microorganism used was Escherichia coli and the microplastic used was polyethylene. During the photocatalytic process under ultraviolet light irradiation, a magnetic stirrer was used at 2000 rpm. The performance of photocatalyst in E. coli disinfection and microplastic degradation improved by the addition of silver dopant. The 3% silver dopant has optimum performance with 79% of microbial disinfection within 2 h and 81% microplastic degradation within 4 h.
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Researchers synthesized Fe- and Ag-modified TiO2 nanotubes via anodization and found they effectively degraded polyethylene microplastics and inactivated E. coli under UV light, with metal modification causing a redshift in light absorption that enhanced photocatalytic performance.
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This review examines how titanium dioxide-based materials can break down microplastics in water using light energy, generating reactive molecules that dismantle plastic polymer chains. While promising, the technology still faces challenges with efficiency and potential harmful byproducts, and more research is needed before it can be used at scale to clean microplastics from real-world water supplies.
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Researchers tested UV light and titanium dioxide photocatalysis to break down microplastic fibers in water, achieving a 97% reduction in mass within 48 hours under optimized conditions, suggesting this approach could be a viable treatment technology for wastewater facilities.
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This study optimized the photodegradation of polyethylene bag debris in water using sulfur-doped titanium dioxide as a photocatalyst, finding that controlling pH, catalyst dose, and polyethylene concentration improved degradation efficiency. The results offer a promising approach for breaking down plastic waste in water environments.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.