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Curcumin, a non toxic yellow food additive, has been used here to sensitize TiO2 in photodegradation of methyl orange contaminant in water with solar light. Using natural dyes is a promising replacement for the hazardous heavy metal-based systems, such as CdS and Ru-compounds, in sensitizing wide band gap semiconductors. Naked (TiO2/Curcumin) and activated-carbon supported (AC/TiO2/Curcumin) catalyst...
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