科研之友
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摘要
A novel vanadium-centered tungstovanadate, {[Zn(phen)(2)(H2O)](2)[VW12O40]}center dot 3H(2)O (1) (phen = 1,10-phenanthroline), has been hydrothermally synthesized and characterized by elemental analysis, single-crystal X-ray diffraction, IR spectroscopy and thermogravimetric analysis. Single-crystal X-ray diffraction at 293 K reveals that 1 consists of a [VW12O40](4-) Keggin unit doubly-grafted by a [Zn(phen)(2)(H2O)](2+) complex. The modified carbon-paste electrode of this tungstovanadate displays good electrocatalytic activity not only towards normal inorganic molecules NO2 (-), BrO3 (-) and H2O2, but also biological molecule vitamin C. To some extent, this work shows that vanadium can be introduced into a polyoxometalate-modified electrode to facilitate catalytic oxidation or reduction of some chemical materials. Furthermore, this tungstovanadate shows high photoactivity with respect to degradation of methylene blue.
