期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 103, 期 3-4, 页码 436-443出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2011.02.007
关键词
TiO2 nanocrystals; Anatase; Solvothermal; Sn4+ doping; Photocatalytic activity
资金
- National Natural Science Foundation of China [21001072]
- Shanghai Leading Academic Discipline Project [S30107]
- Shanghai Science and Technology Committee [09520709500, 09520715400]
- Shanghai Education Commission [11YZ22]
The Sn4+ doped anatase TiO2 nanocrystals with various amounts of dopant Sn4+ ions were prepared from peroxo-metal-complex precursor by solvothermal method and characterized by XRD, TEM, HRTEM, XPS, ICP-AES and UV-vis spectrophotometer. The experimental results indicated that the dopant Sn4+ substituted Ti4+ in the lattice of TiO2, which reflected in the lattice expansion in both a- and c-direction and change of the binding energy. All the Sn4+ doped TiO2 nanocrystal samples appeared to be anatase evenly with dopant level up to 10 mol%. The effect of dopant Sn4+ ions and reaction solvents on physicochemical properties of the obtained Sn4+ doped anatase TiO2 nanocrystals had been discussed. In addition, the growth mechanism and microstructure evolution of Sn4+ doped anatase TiO2 nanocrystals had been suggested. The photocatalytic activity of the Sn4+ doped anatase TiO2 nanocrystals was tested by the degradation of phenol. Compared with the undoped TiO2 sample, the enhanced photocatalytic activity of the Sn4+ doped anatase TiO2 nanocrystals could be attributed to modification of the optical properties and surface state by doping the optimum concentration of Sn4+. ions. (c) 2011 Elsevier B.V. All rights reserved.
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