Experimental Study On Plasma-implanted Modified MOFs And Its Application In SERS Detection And Catalysis

Surface Enhanced Raman Scattering(SERS)is a spectral detection technique that identifies molecular species and structures through fast,damage-free"fingerprint,detection,it has a wide range of applications in areas such as single molecule detection,medical,biological,electrochemical analysis,agricultural production and material analysis.In the field of SERS,the sensitivity of SERS detection is generally determined by the SERS substrate.The substrate that provides hotspots for Raman signal enhancement and has better sensitivity is generally made of precious metals(gold,silver,platinum,etc.).Non-precious metal substrates do not have acceptable detection sensitivity.In this paper,a method of ion-implanting modified traditional MOFs material Cu?BTC to prepare a metal_free and non_hotspot SERS substrate is proposed.This method can produce SERS substrate with ultra-high sensitivity while ensuring economic cost.Metal-organic framework materials(MOFs)is a class of porous polymer materials that are connected by metal ions/metal clusters and organic ligands through coordination,which have a periodic network structure.MOFs have the advantages of high porosity,low density,channel regularity,large specific surface area,diversity of topological structure,adjustable pore size and tailorability,and have important applications in catalysis,gas storage and fuel purification.Based on the above-mentioned MOFs material properties and research on SERS substrate preparation,this paper expands the research of ion implantation modified MOFs in the field of catalysis,and proposes a method of ion implantation modified precious metal loaded Prussian blue MOFs material PdO@CO3[Co(CN)6]2 to increase its catalytic efficiency.The specific research contents of this paper are as follows:1.The Cu-BTC material was modified by ion implantation to prepare the SERS substrate.The prepared Cu-BTC was uniformly coated on the single crystal silicon wafer by spin coating,and the silicon wafer was placed in a immersion plasma ion implanter(P?)reaction chamber to adjust the process parameters for ion implantation.The method has the advantages of simple operation and easy implementation,and can stimulate the SERS activity of Cu-BTC.2.Process optimization of the above preparation process,and continuously change the process steps to have higher SERS enhancement capability.At the same time,the SERS substrate prepared under the optimal conditions was used for sensitivity dete000tion contenting the conventional dyes methylene blue and malachite green were detected.The detection result was that the detection limit of the substrate to R6G was 10-13 M/L,for methylene blue and The detection limit of malachite green reached 10-7M/L,which indicates that the substrate has good detection sensitivity and strong detection adaptability.3.The metal-loaded Prussian blue MOFs material PdO@CO3[Co(CN)6]2 was surface-modified through ion implantation,and the modified material was applied to the catalytic field.The experiments show that the oxygen injection treatment can greatly change the catalytic performance of the material,and make it has higher catalytic efficiency.