Abstract—

Compounds with the general formula \({{{\text{K}}}_{x}}{\text{V}}_{x}^{{{\text{4}} + }}{\text{V}}_{{{\text{2}} - x}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}}{\kern 1pt} \cdot {\kern 1pt} n{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) (0.1 ≤ х ≤ 0.33, 0.2 ≤ n ≤ 0.5) have been synthesized via hydrolytic precipitation using VOSO₄·3H₂O and HCl. In the presence of hydrated vanadyl sulfate at a KVO₃/VOSO₄·3H₂O molar ratio between 0.1 and 1.0, the process yields \({{{\text{K}}}_{{{\text{0}}{\text{.33}}}}}{\text{V}}_{{{\text{0}}{\text{.33}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.67}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}}{\kern 1pt} \cdot {\kern 1pt} {\text{0}}.2{{{\text{H}}}_{{\text{2}}}}{\text{O}}{\text{,}}\) having the highest tetravalent vanadium content. The synthesized compounds have been proposed as electrode materials of all-solid-state ion-selective electrodes. The best performance is offered by an electrode with a \({{{\text{K}}}_{{{\text{0}}{\text{.33}}}}}{\text{V}}_{{{\text{0}}{\text{.33}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.67}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}}{\kern 1pt} \cdot {\kern 1pt} {\text{0}}.2{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) based membrane sensitive to potassium cations in the range 1 ≤ \({\text{p}}{{C}_{{{{{\text{K}}}^{ + }}}}}\) ≤ 4 with a calibration curve slope of 56 mV/\({\text{p}}{{C}_{{{{{\text{K}}}^{ + }}}}}\) at 3.6 ≤ рН ≤ 7.0. We have determined the selectivity coefficients of the electrodes for singly, doubly, and triply charged cations.

中文翻译：

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KxV2O5·nH2O的离子选择性特性

摘要——

具有通式的化合物\({{{\text{K}}}_{x}}{\text{V}}_{x}^{{{\text{4}} + }}{\text{ V}}_{{{\text{2}} - x}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}} }{\kern 1pt} \cdot {\kern 1pt} n{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) (0.1 ≤ х ≤ 0.33 , 0.2 ≤ n ≤ 0.5) 已使用 VOSO ₄ ·3H ₂ O 和 HCl通过水解沉淀合成。在 KVO ₃ /VOSO ₄ ·3H ₂ O 摩尔比介于 0.1 和 1.0 之间的水合硫酸氧钒存在下，该方法产率\({{{\text{K}}}_{{{\text{0}}{\text{.33}}}}}{\text{V}}_{{{\text{0}} {\text{.33}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.67}}}} ^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}}{\kern 1pt} \cdot {\kern 1pt} {\text{ 0}}.2{{{\text{H}}}_{{\text{2}}}}{\text{O}}{\text{,}}\)具有最高的四价钒含量。合成的化合物已被提议作为全固态离子选择性电极的电极材料。最好的性能是由带有\({{{\text{K}}}}_{{{\text{0}}{\text{.33}}}}}{\text{V}} _{{{\text{0}}{\text{.33}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}} {\text{.67}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}}{\kern 1pt} \ cdot {\kern 1pt} {\text{0}}.2{{{\text{H}}}_{{\text{2}}}}{\text{O}}\)基于膜对钾阳离子敏感，范围为 1 ≤ \({\text{p}}{{C}_{{{{{\text{K}}}^{ + }}}}}\) ≤ 4校准曲线斜率为 56 mV/ \({\text{p}}{{C}_{{{{{\text{K}}}^{ + }}}}}\)在 3.6 ≤ рН ≤ 7.0 . 我们已经确定了带单电荷、双电荷和三电荷阳离子的电极的选择性系数。