Abstract Here, for the first time, neodymium was incorporated into the three-dimensional mesoporous siliceous material; TUD-1. In order to understand the chemical and morphological structure of the prepared material, several characterization techniques were performed. The characterization results showed the formation of highly distributed isolated Nd3+ ions incorporated in the silica matrix in tetrahedrally coordinated structure, moreover no aggregation of separate phase(s) was/were observed. The prepared material was investigated as an adsorbent for methyl green (MG) dye in aqueous solution as a model cationic dye. The results showed higher adsorption capacity for Nd-TUD-1 by almost 24 times higher than the neat parent TUD-1 material and more than 100 times higher than bulky Nd2O3 under neutral pH. The adsorption results were fitted perfectly with pseudo-second-order model. Moreover, the adsorption isotherms were perfectly fitted with Freundlich isotherm model which indicated the formation of a multilayer of the dye molecules onto the Nd-TUD-1 surface as a physisorption with endothermic nature.

中文翻译：

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通过掺入钕显着改善介孔 TUD-1 二氧化硅的吸附行为

摘要 这里首次将钕掺入三维介孔硅质材料中；TUD-1。为了了解所制备材料的化学和形态结构，进行了几种表征技术。表征结果表明，形成高度分布的孤立 Nd3+ 离子，以四面体配位结构结合在二氧化硅基质中，而且没有观察到分离相的聚集。研究制备的材料作为甲基绿 (MG) 染料在水溶液中的吸附剂，作为模型阳离子染料。结果表明，在中性 pH 值下，Nd-TUD-1 的吸附能力比纯母体 TUD-1 高近 24 倍，比大块 Nd2O3 高 100 多倍。吸附结果与伪二阶模型完全吻合。此外，吸附等温线与 Freundlich 等温线模型完美吻合，该模型表明在 Nd-TUD-1 表面形成多层染料分子作为具有吸热性质的物理吸附。