Abstract
Abstract Photo-Fenton reactions are introduced into the decomposition process of methyl orange (MO) through modification of TiO 2 nanotubes (TNT) by ferric tartrate. With respect to pure TNT, an enhanced photocatalytic activity of ferric tartrate/TNT is obtained. When the ferric tartrate content is about 5.0%, the degradation rate to MO solution is over 80% after 180 min UV–vis light irradiation. With excessive ferric tartrate introduced into the catalysts, this high photocatalytic performance is depressed. In addition, the photocatalytic activity of the nanocomposites can be optimized by varying the crystallized temperature of TNT precursor. In our experimental conditions, the optimal photocatalytic activity is achieved for the sample pre-crystalized at 773 K (with 5.0 at.% ferric tartrate). Its degradation efficiency to MO reaches 99% within 180 min UV–vis light irradiation.
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