Details

Autor(en) / Beteiligte

• Shifu, Chen
• Lei, Chen
• Shen, Gao
• Gengyu, Cao

Titel

The preparation of coupled WO 3/TiO 2 photocatalyst by ball milling

Ist Teil von

• Powder technology, 2005, Vol.160 (3), p.198-202

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2005

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The coupled photocatalyst WO 3/TiO 2 is prepared by ball milling by doping WO 3 into TiO 2 and using H 2O solution as disperser. The coupled photocatalyst WO 3/TiO 2 is characterized by UV–VIS diffuse reflection spectrum, X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD) and Transmission electron microscopy (TEM). The results show that the optimum percentage of WO 3 doped is 3% and that the photocatalytic activity of the coupled WO 3/TiO 2 photocatalyst is much higher than that of TiO 2 and WO 3–TiO 2 with no ball milling. Compared with TiO 2, the photoexcited wavelength range of the WO 3/TiO 2 photocatalyst red-shifts about 50 nm, and the light absorption intensity is also improved. The crystal phase of TiO 2 is not changed and new crystal phases are not found during the process of ball milling. WO 3 and TiO 2 coupled highly, forming the WO 3/TiO 2 photocatalyst. The increased photocatalytic activity of the coupled photocatalyst may be attributed to the enhance charge separation efficiency and the extend wavelength range of photoexcitation.