Visible-Light Photocatalytic Property of Titanate Nanotubes Sensitized by Several Porphyrins
The visible-light photocatalytic activity of titanate nanotubes (TiNTs) sensitized by 5,10,15,20-tetraphenylporphyrin (TPP), 5,10,15,20-tetraphenylporphyrin manganese (MnTPP), 5,10,15,20-tetraphenylporphyrin nickel (NiTPP) and 5,10,15,20-tetraphenylporphyrin zinc (ZnTPP), respectively, was investigated by the photocatalytic degradation of methyl orange (MO) as a probe reaction. The results showed that the central ions of porphyrins had an important influence on the photocatalytic activity of the samples. The activity was in the order of TiNTs-ZnTPP > TiNTs-TPP > TiNTs-NiTPP > TiNTs-MnTPP. Combined the result of absorption spectra with that of fluorescence spectra, it was demonstrated that various visible-light absorption and photoelectron transfer caused by the central ions of porphyrins were the decisive factor for the visible-light photocatalytic activity of the sensitized TiNTs.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
X. Q. Li et al., "Visible-Light Photocatalytic Property of Titanate Nanotubes Sensitized by Several Porphyrins", Advanced Materials Research, Vols. 239-242, pp. 2403-2406, 2011