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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Effects of composition on redox behaviors of antimony or arsenic ion in silicate melts by differential pulse voltammetry
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Effects of composition on redox behaviors of antimony or arsenic ion in silicate melts by differential pulse voltammetry

机译：差示脉冲伏安法研究组成对硅酸盐熔体中锑或砷离子氧化还原行为的影响

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摘要

Redox behaviors of antimony or arsenic ions in 16Na_2O-10RO- 74SiO_2 (mol%, R = Mg, Ca, Sr, Ba) glass melts are investigated using differential pulse voltammetry. The redox ratio of each ion in every glass composition at a given temperature is estimated from the peak potential in each voltammogram. With increasing temperature, the redox equilibria shift to reduced states. The [Sb~(3+)]/[Sb~(5+)] and [Sb~0]/[Sb ~(3+)] ratios show minimums at the composition of 16Na _2O-10SrO-74SiO_2 glass. It is not the case for arsenic ion in these glasses. The compositional variations of the redox ratios for arsenic ion, [As~(3+)]/[As~(5+)] and [As~0]/[As~(3+)], can be reasonably explained by the basicity of melt. It is suggested that the redox state of multivalent ion in silicate melt is affected not only by the basicity of melt but also by the stability of complex containing the multivalent ion.
机译：利用差分脉冲伏安法研究了16Na_2O-10RO-74SiO_2（摩尔％，R = Mg，Ca，Sr，Ba）在玻璃熔体中锑或砷离子的氧化还原行为。从每个伏安图中的峰值电势，可以估算出给定温度下每种玻璃成分中每种离子的氧化还原比。随着温度升高，氧化还原平衡转变为还原态。在16Na _2O-10SrO-74SiO_2玻璃的组成下，[Sb〜（3 +）] / [Sb〜（5+）]和[Sb〜0] / [Sb〜（3+）]的比值最小。这些玻璃中的砷离子并非如此。砷离子的氧化还原比[As〜（3 +）] / [As〜（5+）]和[As〜0] / [As〜（3+）]的组成变化可通过熔体的碱性。建议在硅酸盐熔体中多价离子的氧化还原状态不仅受熔体的碱度影响，而且受含多价离子的配合物的稳定性影响。

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