Department of Chemistry, Payame Noor University, 19395-4697, Tehran, Islamic Republic of Iran.
Ultrason Sonochem. 2012 May;19(3):546-53. doi: 10.1016/j.ultsonch.2011.09.001. Epub 2011 Sep 10.
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).
多金属氧酸盐（POM）负载在氧化锆上，即 H(3)PW(12)O(40)/ZrO2，是通过溶胶-凝胶技术将多磷酸盐嵌入氧化锆基质中制备的，该技术涉及锆（IV）正丁氧基，Zr（n-OBu）（4）的水解，作为 ZrO(2)的来源。这种不溶性且易于分离的催化剂采用 XRD、FT-IR、SEM 和 UV 漫反射光谱（UV-DRS）进行了表征，表明多磷酸盐已通过化学键合连接到氧化锆载体上，并且原始 Keggin 结构保持完整。通过在水溶液中降解不同的染料来测试负载多磷酸盐的光催化和超声催化活性。POM-ZrO(2)纳米复合材料显示出比纯多金属氧酸盐或纯 ZrO(2)更高的光催化和超声催化活性。
