Preparation, characterization and photocatalytic applications of amine-functionalized mesoporous silica impregnated with transition-metal-monosubstituted polyoxometalates

作者：Li L; Liu CM; Geng AF; Jiang CJ; Guo YH^*; Hu CW

来源：Materials Research Bulletin, 2006, 41(2): 319-332.

DOI：10.1016/j.materresbull.2005.08.013

• chemical synthesis
• infrared spectroscopy
• catalytic properties

Amine-functionalized mesoporous silica materials impregnated with transition-metal-monosubstituted polyoxometalates, K-5[M(H2O)PW11O39]-(EtO)(3)SiCH2CH2CH2NH2-MCM-48 (M = Co/Ni), were prepared by coordination of nickel/cobalt centers in the clusters with the amine surface groups in amine-functionalized mesoporous silica supports. The materials obtained were characterized by powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis-DR), infrared (IR) spectra, magic-angle spinning P-31 MAS NMR, transmission electron microscopy (TEM) and nitrogen adsorption measurements, indicating that the primary Keggin structures remained intact in as-prepared composites, and the composites possessed mesoporous structures. The composites exhibited UV-photocatalytic activity to degrade dye rhodamine B (RB), and the pesticides including hexachlorobenzene (HCB) and methylparathion (MPT). Leakage of K-5[M(H2O)PW11O39] from the support was hardly observed during the photocatalytic tests, attributed to strong coordination interactions between the Keggin units and the amine-functionalized silica surface.

• 出版日期2006-2-2
• 单位长春大学; 东北师范大学; 齐齐哈尔大学; 北京理工大学