Abstract

Formation conditions were studied for compounds of hydrated vanadium oxide \({{\left( {{\text{N}}{{{\text{H}}}_{{\text{4}}}}} \right)}_{x}}{\text{V}}_{y}^{{{\text{4}} + }}{\text{V}}_{{{\text{2}} - y}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}} \cdot n{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) (0.24 ≤ х ≤ 0.36, 0.24 ≤ y ≤ 0.36) prepared by hydrolytic deposition with vanadyl sulfate used as the acidifier. The compound \({{{\text{(N}}{{{\text{H}}}_{{\text{4}}}}{\text{)}}}_{{{\text{0}}{\text{.36}}}}}{\text{V}}_{{{\text{0}}{\text{.36}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.64}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}} \cdot {\text{0}}.7{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) with the highest content of tetravalent vanadium was prepared when the molar ratio is 0.1 ≤ NH₄VO₃/VOSO₄ · 3H₂O ≤ 1.0. \({{{\text{(N}}{{{\text{H}}}_{{\text{4}}}}{\text{)}}}_{{{\text{0}}{\text{.1}}}}}{\text{V}}_{{{\text{0}}{\text{.1}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.9}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}} \cdot {\text{1}}.4{{{\text{H}}}_{{\text{2}}}}{\text{O,}}\) which has the least content of tetravalent vanadium, was prepared by a sol–gel process combined with ion exchange. The prepared ammoniated compounds based on hydrated vanadium oxide show a potential for use as an active material in solid-phase ion-selective electrodes. The electrodes based on \({{{\text{(N}}{{{\text{H}}}_{{\text{4}}}}{\text{)}}}_{{{\text{0}}{\text{.36}}}}}{\text{V}}_{{{\text{0}}{\text{.36}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.64}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}} \cdot {\text{0}}.7{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) and \({{{\text{(N}}{{{\text{H}}}_{{\text{4}}}}{\text{)}}}_{{{\text{0}}{\text{.1}}}}}{\text{V}}_{{{\text{0}}{\text{.1}}}}^{{{\text{4}} + }}{\text{V}}_{{{\text{1}}{\text{.9}}}}^{{{\text{5}} + }}{{{\text{O}}}_{{\text{5}}}} \cdot {\text{1}}.4{{{\text{H}}}_{{\text{2}}}}{\text{O}}\) are selective toward ammonium cations in the range of concentrations 1 ≤ \({\text{p}}{{C}_{{{\text{NH}}_{{\text{4}}}^{ + }}}}\) ≤ 4 for working solution acidities of 4 ≤ рH ≤ 7 and 5 ≤ рH ≤ 6 with the slope 55 and 50 \({\text{mV/p}}{{C}_{{{\text{NH}}_{{\text{4}}}^{ + }}}},\) respectively. Selectivity coefficients in the series of singly, doubly, and triply charged cations were determined for (NH₄)_xV₂O₅ · nH₂O electrodes.

中文翻译：

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（NH 4）x V 2 O 5·n H 2 O的合成及离子选择性能

摘要

研究了水合氧化钒化合物\（{{\ left（{{\ text {N}} {{{\ text {H}}} _ {{\ text {4}}}}}} \ right的形成条件} _ {x}} {\ text {V}} _ {y} ^ {{{\ text {4}} +}} {\ text {V}} _ {{{\ text {2}}-y} } ^ {{{\ text {5}} +}} {{{\ text {O}}} _ {{\ text {5}}}} \ cdot n {{{\ text {H}}} __ { {\文本{2}}}} {\文本{ö}} \）（0.24≤ х ≤0.36，0.24≤ ÿ通过水解沉积与硫酸氧钒作为酸化剂制备≤0.36）。复合\（{{{\ text {（N}} {{{\ text {H}}} _ {{\ text {4}}}} {\ text {）}}} _ {{{\ text { 0}} {\ text {.36}}}}} {\ text {V}} _ {{{\ text {0}} {\ text {.36}}}} ^ {{{\ text {4} } +}} {\ text {V}} _ {{{\ text {1}} {\ text {.64}}}}} ^ {{{\ text {5}} +}} {{{\ text { O}}} _ {{\ text {5}}}} \ cdot {\ text {0}}。7 {{{\ text {H}}} _ {{\ text {2}}}} {\ text {O}} \）当摩尔比为0.1≤NH ₄ VO ₃ / VOSO ₄ ·3H ₂ O≤1.0时，制得了最高价的四价钒。\（{{{\ text {（N}} {{{\ text {H}}} _ {{\ text {4}}}} {\ text {）}}} _ {{{\ text {0} } {\ text {.1}}}} {\ text {V}} _ {{{\ text {0}} {\ text {.1}}}} ^ {{{\ text {4}} + }} {\ text {V}} _ {{{\ text {1}} {\ text {.9}}}} ^ {{{\ text {5}} +}} {{{\ text {O} }} _ {{\ text {5}}}} \ cdot {\ text {1}}。4 {{{\ text {H}}} _ {{\ text {2}}}} {\ text {O ，}} \）含量最低的四价钒，是通过溶胶-凝胶法结合离子交换制备的。制备的基于水合氧化钒的氨化化合物显示出在固相离子选择电极中用作活性材料的潜力。电极基于\（{{{\ text {（N}} {{{\ text {H}}} _ {{\ text {4}}}} {\ text {}}}} _ {{{\ text {0} } {\ text {.36}}}} {\ text {V}} _ {{{\ text {0}} {\ text {.36}}}} ^ {{{\ text {4}} + }} {\ text {V}} _ {{{\ text {1}} {\ text {.64}}}} ^ {{{\ text {5}} +}} {{{\ text {O} }} _ {{\ text {5}}}} \ cdot {\ text {0}}。7 {{{\ text {H}}} _ {{\ text {2}}}} {\ text {O }} \）和\（{{{text {{N}} {{{text {H}}} __ {{\ text {4}}}} {\ text {}}}} __ {{{ \ text {0}} {\ text {.1}}}}} {\ text {V}} _ {{{\ text {0}} {\ text {.1}}}} ^ {{{\ text {4}} +}} {\ text {V}} _ {{{\ text {1}} {\ text {.9}}}} ^ {{{\ text {5}} +}} {{{ \ text {O}}} _ {{\ text {5}}}} \ cdot {\ text {1}}。4 {{{{\ text {H}}} _ {{\ text {2}}}} {\ text {O}} \）对铵阳离子的浓度范围为1≤ \（{\ text {p}} {{C} _ {{{\ text {NH}} _ {{\ text { 4）}} ^ {+}}}} \） ≤4，工作液酸度为4≤рH≤7和5≤рH≤6，斜率55和50\（{\ text {mV / p}} {{C} _ {{{\ text {NH}} _ {{\ text {4}}} ^ {+}}}，\）。对于（NH ₄）_x V ₂ O ₅ · n H ₂ O电极，确定了一系列带单电荷，双电荷和三电荷阳离子的选择性系数。