Here, the hybrid material of polyaniline/layered double hydroxide@carbonnanotubes (PANI/LDH@CNT) is considered a multifunctional material. Instrumental methods, including FTIR, XRD, TEM, SEM, and TGA/DTA were utilized to characterize PANI/LDH@CNT. The polymerization method created PANI/LDH@CNT as an adsorbent to remove toxic iodine in hexane solution with a capture capacity of 303.20 mg g⁻¹ during 9 h. It is 900 mg g⁻¹ in the vapor phase within 24 h. After three cycles, the PANI/LDH@CNT could be regenerated while maintaining 91.90 % iodine adsorption efficiency. Due to the presence of free amine (-N) groups, OH⁻, CO₂H, and π-π conjugated structures in the PANI/LDH@CNT, it is also explored for efficient iodine uptake. It was demonstrated that the pseudo-first-order (PFO) and Langmuir model had the optimum correlation with the kinetic and isotherm data, respectively. Moreover, the use of PANI/LDH@CNT is not only limited to iodine capture; it can also be utilized as a sensitive sensor that displays a fluorescence “turn-off” response for Mn⁷⁺ and Cr⁶⁺ ions and a fluorescence “turn-on” response in the case of Al³⁺ ions. The fluorescence intensity of the PANI/LDH@CNT was turned off in the presence of Mn⁷⁺ and Cr⁶⁺ because of the fluorescence inner filter effect (IFE) mechanism. In contrast, the fluorescence intensity was turned on in the case of Al³⁺, relying on the chelation-enhanced fluorescence (CHEF) effect mechanism. Under optimal conditions, the limit of detection (LOD) of 51, 59, and 81 nM for Mn⁷⁺, Cr^6+, and Al³⁺, respectively. According to the literature, this is probably the first example based on PANI/LDH@CNT as a multifunctional hybrid material employed as an adsorbent for capturing radioactive iodine and as a chemosensor for detecting heavy metal ions in aqueous solutions.

在这里，聚苯胺/层状双氢氧化物@碳纳米管（PANI/LDH@CNT）的杂化材料被认为是一种多功能材料。包括 FTIR、XRD、TEM、SEM 和 TGA/DTA 在内的仪器方法用于表征 PANI/LDH@CNT。聚合方法创建 PANI/LDH@CNT 作为吸附剂，在 9 小时内去除己烷溶液中的有毒碘，捕获容量为 303.20 mg g ^{-1 。}它在 24 小时内在气相中为 900 mg g ^{-1 。}三个循环后，PANI/LDH@CNT 可以再生，同时保持 91.90% 的碘吸附效率。由于游离胺 (-N) 基团的存在，OH ^- , CO ₂PANI/LDH@CNT 中的 H 和 π-π 共轭结构，还探索了有效的碘吸收。结果表明，伪一级 (PFO) 和 Langmuir 模型分别与动力学和等温线数据具有最佳相关性。此外，PANI/LDH@CNT 的使用不仅限于碘捕获；它还可以用作灵敏传感器，显示 Mn ⁷⁺和 Cr ⁶⁺离子的荧光“关闭”响应以及 Al ³⁺离子的荧光“开启”响应。^{PANI/LDH@CNT 的荧光强度在 Mn 7+}和 Cr ⁶⁺存在下被关闭由于荧光内部过滤效应 (IFE) 机制。相比之下，在 Al ³⁺的情况下，荧光强度被打开，依赖于螯合增强荧光 (CHEF) 效应机制。在最佳条件下，Mn ⁷⁺、Cr ⁶⁺和 Al ³⁺的检测限 (LOD) 分别为 51、59 和 81 nM 。根据文献，这可能是第一个基于 PANI/LDH@CNT 作为多功能杂化材料的例子，用作捕获放射性碘的吸附剂和检测水溶液中重金属离子的化学传感器。