The Synthesis,Characterization Of Ti₃C₂T_x And Applying On SERS Study

Surface enhanced Raman spectrum?SERS?is a high sensitive,none damage and in suit detect technology,it has been widely used in electro catalytic,fuel cell and genome studies.Though,Au,Ag and Cu show a great surface enhancement Raman property,seeking a SERS substrate which can be obtained easily,possess stable performance and well repetition is still a hot topic in SERS field.In recent years,a new family two dimensional materials MXenes is attracting researchers'attention owing to its metalline and hydrophilic performance.Research shows Ti₃C₂T_x has a better electron transfer,physical absorption and possess a surface plasmon resonances in visible range,which suggest that there is a great potential in SERS.The article reports the preparation,characterization,and the using on SERS of Ti₃C₂T_x,the mainly contents and results are as follows:?1?The free-standing layers Ti₃C₂T_x is prepared by HF etching Ti₃AlC₂,then using intercalation and exfoliation ways to exfoliate the Ti₃C₂T_x,After delaminated by DMSO,the Ti₃C₂ nanoblocks were dispersed into sheets and stacking cross together randomly constitute a microscopical free-standing structure.The obtained Ti₃C₂T_x contains four kinds of surface functional group:-O,-OH,-F and OH-H₂O.?2?The article Used selfstanding membrane Ti₃C₂T_x as substrate,Rhodamine B,crystal violet,methylene blue,methyl orange,congo red as probe molecules,when adsorbed the molecules on the surface of Ti₃C₂T_x,the Raman intensity of the dyes were enhanced widely by Ti₃C₂T_x,and the Raman enhancement property of Ti₃C₂T_x showing a selectivity for cationic dyes.Besides,Romdaine B,crystal violet,methyl orange,congo red were enhanced under 532nm incident light,except for methylene blue under 633nm incident light.?3?The article studied the influence of etching time on Ti₃C₂T_x structure,and the Raman enhancement for Rhodamine B through simple variable method.Results show that Ti atom layers will adsorb more-OH functional group when the etching reaction starts,then-OH and-F functioinal group will nearly equal.For Raman enhancement,the 4 hour example can enhance the Raman intensity of Rhodamine B most significantly,the Raman enhancement property will be weaken with time longer.