A New Steady and Water-insoluble Polytungstate:Synthesis,Structure,Characterizations and Photocatalytic Properties

【摘要】 Polyoxometalate（POM）-based materials universally have some inherent flaws, including low recovery, metastability, solubility, etc., which may restrict their practical applications. Modifying the materials with organic-inorganic hybrid complexes is one of the most effective approaches to overcome these deficiencies. Under hydrothermal conditions, a new WellsDawson-type polytungstate modified Cd-complex, [Cd（phen）3]3[W₁₈O₅₄（PO₄）₂]·3H₂O(1, phen = 1,10-phenanthroline(C₁₂N₂H₈)), has been synthesized by selecting Cd²⁺ coordinated phen and employing stepwise self-assembly plans. The compound shows good stability and waterinsolubility under normal circumstances. Experiments demonstrate that compound 1 has ideal catalytic activity in the degradation reaction of rhodamine B（Rh B） under ultraviolet（UV）-light and oxidant H₂O₂ conditions. Detailed characterizations including X-ray single-crystal diffraction（XRD）, Powder X-ray diffraction（PXRD）, elemental analysis, energy-dispersive X-ray spectroscopy（EDS） analyses, Fourier transform infrared spectroscopy（FT-IR）, UV-Vis-NIR diffuse reflection spectrum（DRS） and XPS spectrum are presented herein. The electrochemical（cyclic voltammetry（CV）） and photocatalytic properties of 1 have also been studied.更多还原

【Abstract】 Polyoxometalate（POM）-based materials universally have some inherent flaws, including low recovery, metastability, solubility, etc., which may restrict their practical applications. Modifying the materials with organic-inorganic hybrid complexes is one of the most effective approaches to overcome these deficiencies. Under hydrothermal conditions, a new WellsDawson-type polytungstate modified Cd-complex, [Cd（phen）3]3[W₁₈O₅₄（PO₄）₂]·3H₂O(1, phen = 1,10-phenanthroline(C₁₂N₂H₈)), has been synthesized by selecting Cd²⁺ coordinated phen and employing stepwise self-assembly plans. The compound shows good stability and waterinsolubility under normal circumstances. Experiments demonstrate that compound 1 has ideal catalytic activity in the degradation reaction of rhodamine B（Rh B） under ultraviolet（UV）-light and oxidant H₂O₂ conditions. Detailed characterizations including X-ray single-crystal diffraction（XRD）, Powder X-ray diffraction（PXRD）, elemental analysis, energy-dispersive X-ray spectroscopy（EDS） analyses, Fourier transform infrared spectroscopy（FT-IR）, UV-Vis-NIR diffuse reflection spectrum（DRS） and XPS spectrum are presented herein. The electrochemical（cyclic voltammetry（CV）） and photocatalytic properties of 1 have also been studied.更多还原