Method for preparing nano crystal TiO2 porous film using high viscosity solvent

The present invention discloses method of preparing porous nanometer crystal TiO2 film in high viscosity solvent. Inside mixed solvent of anhydrous alcohol and high viscosity reagent terpineol or inside solvent of high viscosity reagent decyl alcohol, butyl titanate as precursor and complexing agent NH(C2H5OH)2 are added, mixed water and ethanol solvent is dropped, and template agent PEG is added via strong stirring to form sol; and through further sol pre-treatment, soaking-drawing film coating and calcining, porous nano crystal TiO2 film is prepared. The said process has increased film thickness, raised apparatus utilization, raised regularity and orderliness of pore structure and increased specific surface area of film. The porous nano crystal TiO2 film may be used widely in photocatalysis, electrochromism, chemical sensitive device, solar cell, etc.