随着全球对能源需求的持续增加，传统化石能源已不能满足日益增长的能源需求，寻找可替代性能源成为当务之急。核能因其清洁、高效、价格低廉等优点被认为是最佳的替代者之一。然而，发展核能过程中产生的气态放射性碘严重危害人体健康，并造成不可修复的环境污染。固体吸附法操作简单，成本低，去除率高，是目前最常用的除碘技术。本文通过简单的离子交换法将[Sn₂S₆]^4-插入LDH层间，制备Sn₂S₆-LDH复合材料。实验结果表明Sn₂S₆-LDH具有优异的碘吸附性能，其碘吸附量高达3825 mg/g，超过了文献报道的大多数碘吸附剂。层间软路易斯碱S^2-对软路易斯酸I₂具有较高的亲和力，有利于捕获更多的碘单质，提高其吸附性能。此外，利用S^2-的还原性，将碘单质还原为I₃^-阴离子与正电性LDH层板稳定结合，而被还原的I^-与金属离子Sn⁴⁺反应形成SnI₄，实现对碘的有效固定，从而达到对放射性碘的高效捕获。因此，Sn₂S₆-LDH是一种极具潜力的去除放射性碘的吸附剂材料。

As the continuous increase in global energy demand, traditional fossil fuels can no longer meet the growing energy demand, and finding alternative energy sources has become a top priority. Nuclear energy is considered one of the best alternatives due to its advantages such as cleanliness, efficiency, and low price. However, the gaseous radioactive iodine generated during the development of nuclear energy poses a serious threat to human health and causes irreparable environmental pollution. Solid adsorption method is the most commonly used removal technology of iodine, due to its simple operation, low cost, and high removal rate. This paper uses a simple ion exchange method to insert [Sn₂S₆]^4- into the LDH interlayers and prepare Sn₂S₆-LDH composite materials. The experimental results indicate that the as-prepared Sn₂S₆-LDH has excellent iodine adsorption performance, with an extremely high adsorption capacity of iodine (3825 mg/g), surpassing most excellent iodine adsorbents reported in literature. The interlayered S^2- as a soft Lewis base has a high affinity for I₂ as a soft Lewis acid, which is beneficial to capturing more iodine elements and enhancing its adsorption performance. In addition, by utilizing the reducibility of S^2-, iodine is reduced to I₃⁻ anions and stably combined with the positively charged LDH laminates. Moreover, the reduced I⁻ anions react with the metal ions of Sn⁴⁺ forming SnI₄, contributing to the efficient capture of iodine. Therefore, Sn₂S₆-LDH is a highly potential adsorbent material for removing radioactive iodine.