Preparation method of photoanode of dye sensitized solar cell

The invention discloses a preparation method of a photoanode of a dye sensitized solar cell. The method comprises that FTO glass is cleaned, a conductive surface of a substrate is coated with a TiO2 compact layer in a scraping manner by utilizing a scraper method, and vacuum drying is carried out; a second layer, namely a TiO2 composite structure layer, is coated in the scraping manner, TiO2 powder is composed of a 3D nanometer net, 3D hollow spheres, P25 and 2D nanometer sheet, and nano precious metal is added; and a film sample is immersed in a dye at certain temperature and washed by waterless ethanol. The novel TiO2 photoanode structure is designed, the precious metal is added for modification, Au and Ag plasma resonance effect is utilized, the visible light absorbing intensity of the dye can be improved, the visible light absorbing range of the dye can be broadened, light scattering is improved, short-circuit current and the photoelectric conversion efficiency of the cell are improved, and the performanc