We investigated the adsorption of heavy metal ions on a nanostructured coating of zinc‐aluminum layered double hydroxides (Zn‐Al LDHs) grown on aluminum foam by one‐step hydrothermal process. This approach aimed to increase the interactive surface and provide a more practical medium for removal of toxic heavy metals from aqueous media. The foam coated with LDH was characterized by using scanning electron microscopy and X‐ray diffraction. After immersion in a copper‐rich water solution, X‐ray photoelectron spectroscopy demonstrated the occurrence of adsorbed copper on the LDH‐coated foam with two oxidation states: particles of metallic copper Cu⁰ with oxidized surface Cu⁺¹. X‐ray diffraction showed the presence of Cu⁺² in the LDH structure.

中文翻译：

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铝泡沫上原位生长的层状双氢氧化物对重金属的吸附

我们研究了通过一步水热法在泡沫铝上生长的锌铝层状双氢氧化物（Zn-Al LDHs）的纳米结构涂层上对重金属离子的吸附。该方法旨在增加相互作用的表面，并提供一种更实用的介质，用于从水性介质中去除有毒的重金属。通过使用扫描电子显微镜和X射线衍射对涂有LDH的泡沫进行表征。浸入富铜水溶液中后，X射线光电子能谱表明在LDH涂层泡沫上吸附的铜发生了两种氧化态：金属铜Cu ^0的颗粒表面被氧化了Cu ⁺¹。X射线衍射表明LDH结构中存在Cu ⁺²。