Research Of Nanoplasma Sensor Based A Photocatalyst Au@ZIF-8

With the economic development and the level of human life improving,the environmental pollution problems are increasingly serious,where water pollution is particularly serious.The processing and detection of organic pollutants in water is a popular research topic,Currently,methods for degrading organic pollutants mainly include photocatalysis oxidation,Fenton catalytic oxidation,ozone oxidation,electrochemical catalysisand so on.The metal organic framework is a kind of material with adjustable pore size and structure formed by the coordination of organic ligands with metal centers.The development of sensor technology,fast,without tags,on-line detection of surface plasmon technology has been widespread concern in the environment and food and drug testing fields are widely used.In this paper,for the detection of MB in water,two nano plasma film sensor were prepared based on MOF and surface plasmon resonance(LSPR),respectively from the photocatalysis oxidation.The preparation of Au@ZIF-8 nano plasma film and the experiment of photocatalytic oxidation and sensing test.We prepared gold particles having a diameter of 15 nm by sol-gel method,and then the gold nanoparticles were compounded with polyvinylpyrrolidone(PVP);Synthesis of ZIF-8 nanoparticles on gold nanoparticles by self-assembly method to wrapped with gold gold nanoparticles to get a composite catalyst with core-shell structure.Then the composite catalyst was loaded onto a transparent base using colloidal deposition to get Au@ZIF-8 nano plasma film.The prepared Au-ZIF-8 film was used for photocatalytic oxidation of methylene blue dye,and it was found that it had good catalytic activity.Then the film was used as a nano-plasma sensor to establish a new method based on LSPR effect to detect methylene blue concentration in solution.we proposed a creative idea that Au-ZIF-8 nano plasma resonance absorption peak swing frequency(f_R)can be applied to reflect the severity of the photocatalytic oxidation.We prepared Au@ZIF-8 nano plasma film and the experiment of photocatalytic oxidation and sensing test.The gold nanoparticles solution was concentrated by PVP and acetone,and the viscosity of the solution was adjusted by glycerol.The film of Au nanoparticals was formed on a transparent glass substrate by colloidal deposition.ZIF-8 nanoparticles were synthesized by hydrothermal method,and ZIF-8 nanoparticles were loaded onto Au film by colloidal deposition to get Au @ ZIF-8 nano-plasma film with high sensitivity.The prepared Au @ ZIF-8 thin film was used for photocatalytic degradation of dye methylene blue and found it had good photocatalytic activity.At the same time,the film was used as a nano-plasma sensor to detect methylene blue concentration in solution.we proposed a creative idea that Au-ZIF-8 nano plasma resonance absorption peak swing frequency(f_R)can be applied to reflect the severity of the photocatalytic oxidation.