摘要
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_(2) and 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_(2) from 3.20 to 2.48 eV,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 sepa-ration of photogenerated electrons and holes in reaction.
基金
financially supported by the National Natural Science Foundation of China(Nos.61434002,51571135)
National Science Foundation of United States(Nos.DMR-1104994,CBET-1510121)
Shanxi Scholars Program(No.[2012]12)
"One Hundred Talented People"of Shanxi Province
Shanxi Province Foundations(Nos.[2012]10,[2013]9)
