Synthesis and Surface Micromorphology of Double Potassium–Cadmium Paratungstate K2Cd4W12O40(OH)2·28H2O

摘要

The synthesis conditions of novel double potassium-cadmium paratungstate BK2 Cd4[W12O40(OH)2]·28H2O from the aqueous solution of potassium tungstate acidified to Z=1.00 with a ratio v(Cd):v(W)=1:6 were elaborated. Using FTIR spectroscopy, it was shown that the anion contained in the isolated salt has the paratungstate B structure. Using Scanning Electron Microscopy, the surface morphology of isopoly compound was studied, and it was found out that the grain size is within the range of 20-45nm. The single-phase condition of the synthesized salt was confirmed by the surface uniform contrast in backscattered electron mode.