Juan-Yu Yang, Dan Li, Xin Wang
Apr 1, 2002
Citations
0
Influential Citations
124
Citations
Quality indicators
Journal
IEEE Journal of Solid-state Circuits
Abstract
Abstract A rapid and simple method, the so-called stearic acid method (SAM) was developed to prepare nanostructured TiO 2 /SnO 2 binary oxides by combustion of stearic acid precursors. The preparative process was studied by Fourier transform infrared spectroscopy (FT-IR). During the preparative process, metal precursors were dispersed in stearic acid at molecular level. Microstructure of the samples was investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), BET specific surface area measurement and the results were compared with those obtained by conventional sol–gel method. The photocatalytic decomposition of methyl orange was used as a model system to determine the relative influences of the preparation method and the concentration of SnO 2 on the photocatalytic activities. It was found that preparative methods affected the crystalline structure of TiO 2 /SnO 2 powders and the anatase phase of TiO 2 was stabilized by the addition of SnO 2 in SAM. The samples prepared by SAM showed better dispersity, larger specific surface area and the TiO 2 /SnO 2 ( r =0.15, SAM) catalyst showed higher photocatalytic activity than Degussa P25.