Preparation Of Mesoporous Rare Earth Oxides And Assembly Of Europium Ion

Mesoporous materials have attracted extensive attention owing to their great potential applications.To date,most researches in mesoporous materials are focused on the synthesis of novel mesoporous materials and their functionalizations for application.Furthermore owing to the unique property of the electron,light, magnetism and catalysis,the mesoporous Rare-earth oxide have earned intensive research and application.The synthesizing of mesoporous rare earth oxide nanomaterials with special morphology,size,dimension and pore structure and studying the internal relationship between its physical properties and structures for further assembling functional rare earth nanomaterials are of theoretical and practical significance.In this paper,the mesoporous Y₂O₃ and Gd₂O₃ were prepared through various methods,meanwhile the relationship between the reaction conditions and morphology and the structure and property has deeply studied,which attributed to the development of the rare-earth oxide mesoporous with special morphology.The whole paper has six chapters and the first chapter is the background introduction,the second is about the experiment materials and characterization instruments,and the last chapter is about summary and prospect of the full paper.The remainder three chapters are noted as follows:In chapter three,mesoporous Y₂O₃ and Gd₂O₃ were prepared by Sol-gel method using three-block polymers F127 as template,and then characterization of the samples were taken.The results suggest that the morphology and the structure of mesoporous materials were influenced greatly by the calcination conditions and quality of the template.This method is easy and the experiment condition is moderate,it is a new way for synthesizing structure controllable mesoporous Rare-earth oxide materials.In chapter four,mesoporous Gd₂O₃ was synthesized by homogeneous precipitate and SDS was used as template,Eu³⁺ doped mesoporous Gd₂O₃ was prepared by hydro-thermal method.The structure and luminescent property was attentively analyzed by XRD,BET and PL.The results demonstrate that the synthesized Gd₂O₃ have obvious mesostructure,and Gd₂O₃:Eu³⁺ emit strong red light under the excitation of UV-light.This method is widespread and can be used to prepare other mesoporous Rare-earth oxides.In chapter five,mesoporous Y₂O₃ was prepared by homogeneous precipitate method,and Eu³⁺ doped mesoporous Y₂O₃ was also synthesized by hydro-thermal method.The results indicate that the mesoporous materials have good array order and large BET special surface area after the template was removed by anion exchange of sodium acetate and SDS.The thermal stability of the mesoporous Y₂O₃ materials can be improved by adding PEG.