Synthesis and characterization of rhenium chalcogenides for nuclear waste management

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2025-05-23 DOI:10.1016/j.solidstatesciences.2025.107988

Logan S. Breton, Jake Amoroso

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Abstract

A new synthetic approach to binary rhenium (Re) chalcogenides was investigated to aid in the preparation of analogous technetium (Tc) compounds for Tc waste management efforts. The Boron-Chalcogen Mixture (BCM) method was utilized for the first time to prepare polycrystalline powders of ReS₂, ReSe₂, and Re₂Te₅ using a perrhenate, NaReO₄, as a rhenium source. Single crystals of ReS₂ were also synthesized using the combined BCM and molten flux methods by adding a K₂CO₃ flux to the reagent mixture. Thermal analysis using TGA/DSC revealed negligible changes from ambient temperature up to ∼300 °C followed by the oxidation of the Re chalcogenides. High Temperature PXRD was used to investigate the crystallinity of ReS₂ at various temperatures revealing an increase in crystallinity up to 275 °C followed by a decrease in crystallinity due to oxidation. The research presented herein demonstrates a significant step towards technetium waste treatment efforts.

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核废料处理用硫属铼的合成与表征

研究了一种新的合成二元铼（Re）硫属化合物的方法，以帮助制备类似的Tc化合物，用于Tc废物的管理工作。首次采用硼-硫混合（BCM）法制备了ReS2、ReSe2和Re2Te5多晶粉体，并以过氧化物NaReO4为铼源。通过在试剂混合物中加入K2CO3助熔剂，采用BCM和熔融助熔剂相结合的方法合成了ReS2单晶。热分析使用TGA/DSC显示，从环境温度到~ 300°C的变化可以忽略不计，随后是Re硫族化合物的氧化。利用高温PXRD对ReS2在不同温度下的结晶度进行了研究，结果表明，ReS2的结晶度在275℃时有所升高，随后由于氧化而降低。本文的研究表明，在处理锝废物方面迈出了重要的一步。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.