NOVELTY - A nanofiber membrane properties improvement method involves preparing a dimethylformamide solution, adding surfactant, acetic acid and titanium phosphate, and stirring mixture to obtain a titania precursor coating solution. The resultant solution is applied onto a conductive glass. The dimethylformamide solution is added with surfactant, acetic acid, titanium phosphate and carbon nanotubes by stirring mixture, treating to form polyvinyl acetate/titanium phosphate composite fibers, gathering to form fiber membranes and treating with a titanium chlorate aqueous solution to obtain final product.    USE - Method for synergistic improvement of properties of nanofiber membranes in a dye-sensitized solar cell by carbon nanotubes and titanium tetrachloride.    ADVANTAGE - The method enables improving nanofiber membrane properties in an efficient manner, and preparing a solar cell with high conversion efficiency.    DETAILED DESCRIPTION - A nanofiber membrane properties improvement method involves preparing a dimethylformamide solution with 15wt.% polyvinyl acetate, adding Triton X-100 (RTM: nonionic surfactant) (25 vol.%), acetic acid (12.5 vol.%) and titanium phosphate, and stirring the mixture magnetically for 8 hours to obtain a coating solution of a titania precursor. The resultant solution is applied onto a fluorine-doped tin oxide conductive glass by a spin coater to form a spin-coating layer. The dimethylformamide solution with 11.5 wt.% polyvinyl acetate is added with Triton X-100 (RTM: nonionic surfactant) (15 vol.%), acetic acid (10 vol.%), titanium phosphate and multi-walled carbon nanotubes (0.1-1%), stirring mixture magnetically for 8 hours to obtain a spinning solution of a titania precursor-I, and processing ultrasonically to form homogeneous dispersion of multi-walled carbon nanotubes in the solution. The obtained spinning solution of the titania precursor-I is injected into an injector with a nozzle followed by applying high voltage between the nozzle and a receiving device, forming an injected thin flow of charged droplets in an electric field by overcoming the surface tension, controlling the injection rate by a micro-injection pump, volatilizing solvent, solidifying injected thin flow into polyvinyl acetate/titanium phosphate composite fibers, and gathering to form fiber membranes onto the spin-coated fluorine-doped tin oxide conductive glass. The resultant product is spinned by the receiving device followed by spinning resultant product for 30 minutes, sintering gathered dried fiber membranes in a muffle furnace, raising temperature to 480 degrees C at a rate of 1 degrees C/minute, and keeping the temperature for 1 hour to obtain titania nanofiber membranes. The obtained titania nanofiber membranes are treated with a titanium chlorate aqueous solution at 75 degrees C to obtain finished product.