文档介绍：Solar aspects of papers
Curcumin-sensitized anatase TiO2 nanoparticles for photodegradation of methyl orange with solar radiation
Ahed Zyoud* and Hikmat Hilal
Semiconductor & Solar Energy Research Laboratory (SSERL), Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine. E-mail: ******@
Abstract. Curcumin, a non toxic yellow food additive, has been used here to sensitizeTiO2 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 pounds, in sensitizing wide band gap semiconductors. Naked (TiO2/Curcumin) and activated-carbon supported (AC/TiO2/Curcumin) catalyst systems were prepared and investigated here. The effects of different reaction parameters on reaction rate, such as amount of catalyst, contaminant concentration and pH, were all studied in terms of turn number (.) and quantum yield (.) values. The results show that curcumin can sensitize TiO2 particles to solar light in methyl orange photo-degradation processes.
Keywords: Curcumin; Sensitization; Photo-degradation, TiO2
Introduction
TiO2 is wide band gap (~ eV) semiconductor that is widely used as catalyst in photo-degradation anic contaminants in water. Its wide band gap limits TiO2 application to the costly UV irradiation. The c