A significant improvement in adsorption behavior of mesoporous TUD-1 silica through neodymium incorporation

• 作者: Badria M.Al-Shehri Sahar K.Mohamed Shaykha Alzahly Mohamed S.Hamdy
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: RARE EARTHS APPLICATIONS
• 页码范围: 469-476
• 页数: 8页
• 语种: 英文

摘要

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 character-ization techniques were performed.The characterization results show 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 show 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 indicates the formation of a multilayer of the dye molecules onto the Nd-TUD-1 surface as a physisorption with endothermic nature.