An efficient and cost-effective method for water purification is achieved by irradiating ultraviolet light on a semiconductor metal-oxide like Titanium Dioxide (TiO2), thereby activating it and releasing electrons that cause oxidation. The TiO2 nanoparticles are attached to the nanopores on the surface of microfibers of Poly-(methyl-methacrylate) (PMMA), a UV transparent polymer. The challenge is to
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