▎ 摘　　要

NOVELTY - Preparing Ag-TiO2-rGO-PAN composite film, involves (a) dispersing the oxidized graphene powder in a certain volume of ultrapure water/ethanol system; (b) weighing a certain amount of P25, adding TiO2 (Titanium dioxide) powder into the graphene oxide dispersion; (c) transferring the mixed solution to the stainless steel high pressure reactor for hydro-thermal treatment; (d) putting the mixed solution after hydro-thermal treatment into a centrifuge for centrifuging; (e) weighing a certain amount of PAN powder and dissolve in Dimethylformamide; (f) putting the PAN solution and TiO2-rGO dispersion into two injection cylinders of the electrostatic spinning machine; (g) putting the composite film into the reaction vessel, adding Silver nitrate solution, placing under the ultraviolet light source, reacting for a certain time, absorbing the solution, taking out the composite film, washing and drying to obtain the Ag-TiO2-rGO-PAN composite film. USE - Method for preparing Ag-TiO2-rGO-PAN composite film. ADVANTAGE - The method for preparing Ag-TiO2-rGO-PAN composite film has photo-catalytic activity and sterilizing performance. The Ag-TiO2-rGO-PAN composite film prepared has strong catalytic activity, easy preparation, can be recycled, easy to recycle, secondary pollution is small. The method is simple, the reaction condition is relatively simple and mild, green, the material is easy to be recycled, safe and environment-friendly. DETAILED DESCRIPTION - Preparing Ag-TiO2-rGO-PAN composite film, involves (a) dispersing the oxidized graphene powder in a certain volume of ultrapure water/ethanol system and ultrasonic treatment to obtain the graphene dispersion; (b) weighing a certain amount of P25, adding TiO2 (Titanium dioxide) powder into the graphene oxide dispersion, stirring to obtain mixed solution; (c) transferring the mixed solution to the stainless steel high pressure reactor for hydro-thermal treatment; (d) putting the mixed solution after hydro-thermal treatment into a centrifuge for centrifuging, taking the centrifuged precipitate, washing for several times, drying, grinding to obtain TiO2-rGO powder; (e) weighing a certain amount of PAN powder and dissolve in Dimethylformamide, preparing into PAN solution and stir it overnight with magnetic force, weighing a certain amount of TiO2- rGO powder mixed in methanol and ethanol and adding MEMO reagent and stir it overnight with magnetic force to prepare TiO2-rGO dispersion; (f) putting the PAN solution and TiO2-rGO dispersion into two injection cylinders of the electrostatic spinning machine, starting the electrostatic spinning, collecting the composite film of the nanoparticles and the fiber on the roller collector by PAN electro-spinning nano fiber and TiO2-rGO electric spraying nanoparticles, finishing the electrostatic spinning, drying the composite film for future use; (g) putting the composite film into the reaction vessel, adding Silver nitrate solution, placing under the ultraviolet light source, reacting for a certain time, absorbing the solution, taking out the composite film, washing and drying to obtain the Ag-TiO2-rGO-PAN composite film.