Nitrogen(N) and phosphorus(P) co-doped anatase TiO_2 nanosheets were realized by low-temperature self-doping N–TiO_2 followed by high-temperature P doping with foreign precursor. It is found that P doping process can maintain good TiO_2 nanosheets morphology with exposed {001} facets. Chemical state of dopants indicates that N and P atoms replace O on O sites in TiO_2 lattice.Compared with pure TiO_2and N-doped TiO_2, N–P codoped TiO_2 nanosheets exhibits stronger optical absorption and higher degradation rate of dye molecules in visible light regime. The enhanced photocatalytic properties are attributed to two factors. On one hand, N–P co-doping can effectively reduce band gap of TiO_2from 3.20 to 2.48 e V,leading to an enhancement of the absorption in visible light regime. On the other hand, the presence of exposed {001}facets of TiO_2 nanosheets can induce the effective separation of photogenerated electrons and holes in reaction. Nitrogen (N) and phosphorus (P) co-doped anatase TiO 2 nanosheets were realized by low-temperature self-doping N-TiO_2 followed by high-temperature P doping with foreign precursor. It is found that P doping process can maintain good TiO_2 nanosheets morphology with exposed {001} facets. Chemical state of dopants that that N and P atoms replace O on O sites in TiO 2 lattice. Compared with pure TiO 2 and N-doped TiO 2, N-P codoped TiO 2 nanoshews On one hand, N-P co-doping can effectively reduce band gap of TiO 2 from 3.20 to 2.48 e V, leading to an enhancement of the absorption in visible light regime. On the other hand, the presence of exposed {001} facets of TiO_2 nanosheets can induce the effective separation of photogenerated electrons and holes in reaction.