Enhanced adsorption and visible-light-induced photocatalytic activity of hydroxyapatite modified Ag–TiO2 powders

✍ Scribed by Y. Liu; C.Y. Liu; J.H. Wei; R. Xiong; C.X. Pan; J. Shi

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 265 KB
• Volume: 256
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2010.04.022

✦ Synopsis

In order to get a kind of materials with enhanced adsorption and photocatalytic performance, hydroxyapatite modified Ag-TiO 2 powders (Ag-TiO 2 -HAP) were prepared by a facile wet chemical strategy. The powders were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis absorption spectroscopy, N 2 adsorption-desorption measurement (BET), photoluminescence spectroscopy (PL), etc. The photocatalytic activities were evaluated by photocatalytic oxidation decomposition of acetone in air under visible-light illumination. The results showed that the coupled system indicated a highest photocatalytic activity and photochemical stability under visible-light irradiation than all the other catalysts. The intensively improved visible-light-induced photocatalytic activity of the Ag-TiO 2 -HAP hybrids could be attributed to its strong absorption in the visible-light region, low recombination rate of the electron-hole pair and large BET specific surface area.