NOVELTY - Zinc acetate dihydrate, sodium hydroxide and water are mixed, to form growth solution which is coated on glass, to form seed crystal layer, the crystal layer is processed, to form nanowire array. Zinc-acetate dihydrate powder and diethylene glycol are mixed, heated and stirred, to obtain suspension of zinc-oxide microspheres. The zinc-oxide microspheres powder is dissolved in ethyl alcohol, to form suspension which is coated on glass, sintered, cooled, sensitized and dried, to obtain composite photo-anode of zinc-oxide nanostructure.    USE - Manufacture of composite photo-anode of zinc-oxide nanostructure used for dye-sensitized solar cell.    ADVANTAGE - The composite photo-anode of zinc-oxide nanostructure is manufactured efficiently and economically with high specific surface area, and excellent light scattering characteristics and productivity.    DETAILED DESCRIPTION - Zinc acetate dihydrate, monoethanolamine and deionized water are dissolved in ethylene glycol monomethyl ether in molar ratio of 1:1:0.5, to obtain mixed solution having concentration of 0.1-1 mol/L. The mixed solution is sealed and placed in a constant-temperature water bath, magnetically stirred at 60 degrees C, to obtain transparent sol. Then, the sol is deposited on clean fluorine-doped tin-oxide (FTO) glass plate, dried and annealed, to obtain a zinc-oxide seed crystal layer. Further, zinc acetate dihydrate and sodium hydroxide are dissolved in water, to form growth solution. The substrate is coated with growth solution, to form zinc-oxide seed crystal layer. The zinc-oxide seed crystal layer is processed, to obtain zinc-oxide nanowire array. Zinc-acetate dihydrate powder (1-2 g) is ground and dissolved in diethylene glycol, to obtain diethylene glycol solution containing 0.05-0.1 mol/L or zinc acetate dihydrate. The solution is heated at 130 degrees C and stirred, to obtain suspension of zinc-oxide microspheres. The obtained suspension is centrifuged, washed and dried, to obtain zinc-oxide microsphere powder. The obtained zinc-oxide microsphere powder is dissolved in absolute ethyl alcohol, to form suspension. The suspension is coated on the FTO glass on which the zinc-oxide nanowire is grown, the substrate is sintered at 350-500 degrees C for 0.5-2 hours, cooled, sensitized for 0.5-1 hour, and dried, to obtain composite photo-anode of zinc-oxide nanostructure.