| In recent years,with the development of graphene materials,other two-dimensional materials such as two-dimensional transition metal nitride/carbide(MXene)have also been studied to some extent.MXene(V2C,Ti2C,Ti3C2,etc.)phase materials have some properties of graphene-like materials,showing great application potential in the fields of energy storage,adsorption,optics,and catalysis.In this paper,the preparation of Ti3C2Tx(Tx refers to the functional group introduced in the reaction process)and Ti3C2Tx/Ag nanocomposites was studied.A new two-dimensional nano material Ti3C2Tx was prepared by fluoride etching Ti3Al C2,and the etching time in the etching condition was studied.By controlling the single variable method,the etching time is set as 6 h,12 h,18 h,24 h,30 h and 36 h respectively.According to the surface enhanced Raman signal and the resistivity,the best etching time is 24 h.At this time,the enhancement effect of the Raman detection signal of Ti3C2Tx is the best and the resistivity is the lowest.On this basis,Ti3C2Tx/Ag nanocomposites were prepared by the reduction of nano silver by photoinduced method.The composite time,the molar ratios of Ag and Ti3C2Txand the reducing agent were studied in detail.The enhancement effect of Raman detection signal when it is used as substrate material is detected,and the most suitable composite condition is found according to the Raman enhancement effect,and the resistivity of the composite material is measured.The preparation of Ti3C2Tx/Ag nanocomposites is a further exploration of the application of MXene in surface enhanced Raman spectroscopy,which provides a theoretical basis for the research of MXene nanocomposites.Ti3C2Tx/Ag nanocomposites prepared by photo induced reduction of silver nanoparticles are used as substrate materials.Compared with the pure Ti3C2Tx substrate,the Raman detection signal of Rhodamine B dye molecules is at least one order of magnitude higher,and the detection limit is as low as 1.0×10-11mol/L. |
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