In situ analysis for spontaneous reduction of Eu3+ in LiCl pyroprocessing media at 923 K
In situ analysis for spontaneous reduction of Eu3+ in LiCl pyroprocessing media at 923 K
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923 K 下 LiCl 高温处理介质中 Eu3+ 自发还原的原位分析
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Hansoo Lee
中科院分区：
文献类型：
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作者：
Tackjin Kim;Yong;Jun;Yongju Jung;D. Ahn;Hansoo Lee
当将 EuCl3 添加到 923 K 的 LiCl 熔盐高温加工介质中时，研究了 Eu3+ 自发还原为 Eu2+ 的情况。通过测量将 Eu2+ 离子氧化为 Eu3+ 离子所消耗的总电荷来计算 Eu2+ 的量。介质中Eu2+ 与Eu3+ 的浓度比估计约为0.40。另外，已证实Eu3+还原成Eu2+是由Cl-对Cl2的氧化力引起的。通过紫外-可见光和发光光谱研究了 LiCl 熔盐体系中 Eu3+ 和 Eu2+ 的共存。根据紫外-可见吸收光谱计算，Eu3+ 和 Eu2+ 的摩尔吸收率分别为 423 M−1 cm−1 和 1954 M−1 cm−1。
The spontaneous reduction of Eu3+ to Eu2+ was examined when EuCl3 was added into a pyroprocessing media of LiCl molten salt at 923 K. The amount of Eu2+ was calculated by measuring the total charge consumed to oxidize Eu2+ ions to Eu3+ ions. The concentration ratio of Eu2+ to Eu3+ was estimated to be about 0.40 in the media. In addition, it is confirmed that the reduction of Eu3+ to Eu2+ is caused by the oxidation power of Cl− to Cl2. The coexistence of Eu3+ and Eu2+ in the LiCl molten salt system was examined by UV–Visible and luminescence spectroscopy. The molar absorptivities of Eu3+ and Eu2+, calculated from UV–Visible absorption spectra, were 423 and 1954 M−1 cm−1, respectively.