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

• Published in: Applied surface science Vol. 256; no. 21; pp. 6390 - 6394
• Main Authors: LIU, Y, LIU, C. Y, WEI, J. H, XIONG, R, PAN, C. X, SHI, J
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 15.08.2010
• Subjects: Adsorption; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Hydroxyapatite; Illumination; Photocatalysis; Physics; Silver; Specific surface; Surface chemistry; X-ray photoelectron spectroscopy; X-rays; Photocatalytic activity; Inorganic compounds; catalyst; Transition element compounds; Visible light; Hydroxyapatite; Modified catalyst; Titanium oxide; Hydroxyapatite modified Ag-TiO; Acetone
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2010.04.022

In order to get a kind of materials with enhanced adsorption and photocatalytic performance, hydroxyapatite modified Ag-TiO2 powders (Ag-TiO2-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, N2 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-TiO2-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.