Method for preparing matchstick-shaped TiO2 nanoparticle and nanorod composite array

The invention provides a method for preparing a matchstick-shaped TiO2 nanoparticle and nanorod composite array. The method comprises the specific steps: preparing a titanium dioxide nanorod array on a transparent conductive glass substrate by using a hydrothermal method; by taking a high-purity metal Ti as a sputtering target, by virtue of a direct-current magnetron sputtering method, depositing Ti nanoparticles on the surface of the top end of the prepared titanium dioxide nanorods, and finally performing annealing crystallization in air, thereby obtaining the matchstick-shaped TiO2 nanoparticle and nanorod composite array. According to the composite array, the specific surface area of the TiO2 nanorod array is improved, and the light absorption range is widened. The matchstick-shaped TiO2 nanoparticle and nanorod composite array can be assembled into working electrodes of organic dye sensitized solar cells, photocatalysis, photocatalytic water splitting hydrogen production and other photoelectric devices, and the photoelectric conversion efficiency, photocatalytic degradation efficiency and photocatalytic water splitting hydrogen efficiency of the devices can be effectively improved. Meanwhile, the composite array is simple in preparation process, high in repeatability, low in cost and easy for large-scale production.