Preparation Of Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺ Ordered Porous Storage Materials

As a long-term optical energy storage materials,orderly porous Sr₂MgSi₂O₇:Eu²⁺,Dy³⁺?SMSOED?has porous structure with open large surface area and advantages of silicate energy storage.Porous structure greatly increases the light contact area of the sample,which improves the utilization of light energy to achieve the efficient storage and transmission of energy.In addition,porous materials can be widely used as carriers in various fields.The purpose of this experiment is to combine porous materials with silicate materials to prepare ordered porous SMSOED energy storage materials.Using surface active agent template method showed that through sol-gel method,when the molar ratio of CTAB to silicon source was 0.16:1 and pH=7,the sintering temperature was 950? for 2 h.The pore size and arrangement were ordered.The average pore size was 1.926 nm and the specific surface area was 5.669 m2/g.The sample prepared from 1-hexadecyl-3-methylimidazolium bromide?C20H39N2Br?as a template showed that when the molar ratio of surface active agent to silicon source was 0.30:1,the sample was calcined to 1050? for 2 h.The average pore size and pore size of the prepared samples were 1.617 nm and 2.886 m2/g,respectively.The size and distribution of the pores were ordered and energy storage was good.The samples all had sharp excitation emission peaks at 355 nm and 467 nm.In addition,porous materials were used as template shows when the mass ratio of silicon source to ZSM-5 was 7: 1.The sample was calcined at 1050? for 1h,average pore size was 4.5 nm and the specific surface area was 2.166 m2/g.Using polystyrene spheres as templates,when the volume ratio of polystyrene spheres to silica source was 2:1,the calcination temperature was 1050? for 1h,the average pore size of the sample was4.4nm,and the specific surface area was 2.587 m2/g.Using C3N4 nanotubes as templates,when C3N4 nanotubes and silicon source volume ratio of 1: 1,calcination temperature of1050? for 3h,the average pore size of sample was 4.5 nm,the specific surface area was2.731 m2/g.The samples all had sharp excitation emission peaks at 355 nm and 467 nm.