Donetsk National Technical University
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https://ea.donntu.edu.ua/jspui/handle/123456789/25962| Title: | Синтез солей лантаноидов с анионом паравольфрамата Б, Ln10[W12O40(OH)2]3∙Nh2o (Ln = Ce, Dy, Ho) |
| Other Titles: | SYNTHESIS OF LANTHANIDE SALTS WITH PARATUNGSTATE B ANION, Ln10[W12O40(OH)2]3∙nH2O (Ln = Ce, Dy, Ho) |
| Authors: | Радио, С.В. |
| Keywords: | паравольфрамат Б–анион церий диспрозий гольмий ИК–спектроскопический анализ морфология поверхности paratungstate B anion Cerium Dysprosium Holmium synthesis surface morphology |
| Issue Date: | 2014 |
| Publisher: | Наукові праці ДонНТУ. Серія: Хімія і хімічна технологія. - 2014. - Вип. 1(22). - С. 81-88 |
| Abstract: | Установлены условия образования и из паравольфрамата Б натрия Na10[W12O40(OH)2]∙27H2O синтезированы средние соли церия, диспрозия и гольмия с анионом паравольфрамата Б ― Ce10[W12O40(OH)2]3∙94H2O, Dy10[W12O40(OH)2]3•100H2O, Ho10[W12O40(OH)2]3•54H2O. Методом ИК-спектроскопии показана принадлежность изополианиона в составе выделенных солей к структурному типу паравольфрамата Б. Методом сканирующей электронной микроскопии установлена однофазность синтезированных солей и показано, что размер зерен образцов находится в пределах 300 750 нм. |
| Description: | The conditions for the synthesis of novel Ce(III), Dy(III), and Ho(III)–containing salts with paratungstate B anion were determined. By the methods of chemical analysis and FTIR spectroscopy it was shown that Ce10[W12O40(OH)2]3∙94H2O, Dy10[W12O40(OH)2]3•100H2O, Ho10[W12O40(OH)2]3•54H2O were precipitated from Na10[W12O40(OH)2]∙27H2O solution after adding the stoichiometric amounts of lanthanide (III) salts. By FTIR spectroscopy, the isopoly anion is shown to belong to the paratungstate B structural type. It was found that single–phase product can not be obtained from acidified up to Z = ν(H+)/ν(WO42–) = 1.17 aqueous solutions of Na2WO4. By the method of scanning electron microscopy it was shown that the grain size of synthesized salts is within the range of 300–750 nm. Homogeneity of the obtained paratungstate B salts was confirmed by the uniform contrast of the surface mode of backscattered electrons. |
| URI: | http://ea.donntu.edu.ua/handle/123456789/25962 |
| Appears in Collections: | Випуск 1(22), 2014 |
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