title: Preparation and characterization of polyphosphotungstate/ZrO2 nanocomposite and their sonocatalytic and photocatalytic activity under UV light illumination.
abstract: Polyoxometalates (POM) supported on zirconia, H(3)PW(12)O(40)/ZrO2, were prepared by incorporating polyphosphotungstate into a zirconia matrix via sol-gel technique that involving the hydrolysis of zirconium (IV) n-butoxide, Zr (n-OBu)(4), as the ZrO(2) source. This insoluble and readily separable catalyst was characterized by using XRD, FT-IR, SEM, and UV diffuse reflectance spectroscopy (UV-DRS), indicating that the polyphosphotungstate was chemically attached to the zirconia supports, and primary Keggin structure remained intact. The photocatalytic and sonocatalytic activity of the supported polyphosphotungstate was tested via degradation of different dyes in aqueous solutions. The POM-ZrO(2) nanocomposite showed higher photocatalytic and sonocatalytic activity than pure polyoxometalate or pure ZrO(2).
authors: Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Islamic Republic of Iran. hosseinsalavati@pnu.ac.ir
authors: Hossein
authors: H
authors: Salavati
authors: Nahid
authors: N
authors: Tavakkoli
authors: Marzieh
authors: M
authors: Hosseinpoor
mesh_terms: D002384:Catalysis / Q000528:radiation effects; D004396:Coloring Agents / Q000737:chemistry* / Q000528:radiation effects*; D019220:High-Energy Shock Waves; D010772:Phosphotungstic Acid / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage; D013010:Sonication / Q000379:methods*; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D004396:Coloring Agents; D014867:Water; D010772:Phosphotungstic Acid; D015040:Zirconium; C028541:zirconium oxide