XRD SEM and CV characterization show that La~(3+) or Cd~(2+) doping changes the surface structure of TiO_2. UV-via absorption spectrum shows that the absorption band of doped TiO_2 film moves to longer wavelength.

• 本实验条件下；掺杂nLa~(3+)/n_TiO2为0.；5%25的La~(3+)/TiO_2电极煅烧450℃；掺杂nCd~(2+)/nTiO2为0