Cu-BTC衍生的CuO和CuO/Cu2O复合物：一种高效的碘离子吸附材料,Materials Research Express

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Cu-BTC衍生的CuO和CuO/Cu2O复合物：一种高效的碘离子吸附材料
Materials Research Express ( IF 1.8 ) Pub Date : 2023-02-20 , DOI: 10.1088/2053-1591/acb981
Peng Wang , Chun-Hui Gong , An-Yu Tang , Ao-Tian Gu , Kai-Wei Chen , Yang Yi

由于亲水性，苯三羧酸铜 (Cu-BTC) 不能用作水中的吸附剂。然而，煅烧过程会破坏苯环结构而失去亲水性并保留碳结构骨架。成功制备了基于立方体Cu-BTC (C-Cu-BTC) 和十二面体Cu-BTC (D-Cu-BTC) 的CuO 复合材料和CuO/Cu 2 _{O复合材料，用于吸收水中的放射性碘离子。}煅烧前后，SEM和XRD被用来表征形貌和材料结构的变化。碘离子吸附实验表明，它们的饱和吸附容量可达28.64 mg g ^-1 (C-CuO)、49.63 mg g ^-1 (D-CuO)、49.84 mg g ^-1 (C-CuO/Cu)₂ O)和91.91 mg g ^-1 (对于D-CuO/Cu ₂ O)，分别。如热力学曲线所示，吸附剂对碘离子的吸附是一个放热反应。通过吸附动力学结果证明CuO复合物对碘离子的吸附是物理吸附，CuO/Cu ₂ O复合物对碘离子的吸附是化学吸附。与CuO复合材料相比，CuO/Cu ₂ O复合材料对碘离子的吸附能力更强。此外，还研究了普通离子对碘化物吸收的干扰。不同类型的离子，例如 Cl ⁻、SO ₄ ²⁻和 CO ₃ ²⁻, 对两种吸附剂的碘离子吸附能力有影响。这些离子对CuO复合材料的碘离子吸附有轻微影响。_{然而，这些离子对CuO/Cu 2} O复合材料的碘离子吸收能力有较大的影响。影响最大的是CO ₃ ^2-，CO ₃ ^2-使CuO/Cu ₂ O复合物的吸附量降低44%碘离子吸附量。

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Cu-BTC derived CuO and CuO/Cu2O composite: an efficient adsorption material to iodide ions

The copper benzene tricarboxylic acid (Cu-BTC) cannot be used as an adsorbent in water due to hydrophilicity. However, the calcination process can destroy the benzene ring structure to lose hydrophilicity and retains carbon structure skeleton. The CuO composite and CuO/Cu₂O composite based on cubical Cu-BTC (C-Cu-BTC) and dodecahedral Cu-BTC (D-Cu-BTC) are successfully manufactured to absorb radioactive iodine ion from water. Before and after calcination, the SEM and XRD were used to characterize the changes of morphology and material structure. The adsorption experiment for iodine ion showed that their saturated adsorption capacities can reach 28.64 mg g⁻¹ (for C–CuO), 49.63 mg g⁻¹ (for D-CuO), 49.84 mg g⁻¹ (for C–CuO/Cu₂O) and 91.91 mg g⁻¹ (for D-CuO/Cu₂O), respectively. The iodine ion adsorption of adsorbent is an exothermic reaction as shown thermodynamic curves. Through results of adsorption kinetics it is proved that the iodide ion adsorption of CuO composite is physical adsorption and the iodide ion adsorption of CuO/Cu₂O composite is chemical adsorption. Compared with CuO composite, CuO/Cu₂O composite had better absorption capacity for iodide ions. Furthermore, the interference of common ion on iodide absorption has also been studied. The different types of ion, such as Cl⁻, SO₄ ²⁻ and CO₃ ²⁻, have effects on the iodine ions absorption capacity for two types of adsorbent. These ions have a slightly effect on iodine ions adsorption of CuO composite. However, these ions have greater influences on iodine ions absorption capacity of the CuO/Cu₂O composite. The biggest influence is CO₃ ²⁻, and the CO₃ ²⁻ reduces the adsorption capacity by 44% iodine ion absorption capacity for the CuO/Cu₂O composite.

更新日期：2023-02-20

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