title: Self-assembly of mesoporous Bi-S-TiO2composites for degradation of industrial dinitrotoluene solution under UV light.
abstract: Mesoporous Bi-S-TiO2composites were synthesized by the method combining evaporation-induced self-assembly (EISA) method with impregnation process. Characterization shows mesoporous Bi-S-TiO2was a highly crystalline anatase, with relatively high thermal stability, large surface area (75-120 m2/g), and large mesopore (10-20 nm). The results also revealed that Bi and S species existed in Bi4+, S2-, S and S6+forms in the mesoporous TiO2, which allow the mesoporous Bi-S-TiO2illustrating strong absorption in the ultraviolet region, and the absorption edge shifts to the visible-light region. Photodegradation tests shown that, about 92.3% industrial aqueous dinitrotoluene (DNT) solution could be degraded by 1.5%Bi-S-TiO2under UV irradiation for 5 h. Concentration of Bi ions and calcination temperature were found to play important roles in its mesoporous properties and photocatalytic activity.
authors.affiliation: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No.5, Zhongguancun South Street, Haidian District, Beijing, 100081, China. ganqiang@bit.edu.cn.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Gan
authors.affiliation: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No.5, Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Guoqi
authors.initials: G
authors.lastname: Feng
authors.affiliation: College of Science, China Agricultural University, Beijing, 100193, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.affiliation: Institute of Explosives and Propellants, Beijing Institute of Technology, Beijing, 100081, China.
authors.forename: Hairu
authors.initials: H
authors.lastname: Shang
authors.affiliation: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, No.5, Zhongguancun South Street, Haidian District, Beijing, 100081, China.
authors.forename: Changgen
authors.initials: C
authors.lastname: Feng
mesh_terms: D002384:Catalysis; D010782:Photolysis; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: C009495:titanium dioxide; D014025:Titanium
keywords: Bi element doping; Bi-S-TiO2 composites; EISA process; Industrial dinitrotoluene solution; Mesoporous TiO2 derivatives; Photocatalytic degradation; Sulfate ion impregnation