A beaker of wastewater dyed orange is treated with nanofibres made of titanium oxide, a chemical commonly used as a pigment in paint and plastics. But in this form, the chemical takes on extarordinary powers. Among other things, when exposed to sunlight, it removes the pollutants, leaving clean, fresh drinking water behind. Not only that, but Nanyan Technical University Professor Darren Sun says the process itself generates hydrogen, a source of clean fuel.moreless
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