One-step synthesis of nanocrystalline N-doped TiO2 powders and their photocatalytic activity under visible light irradiation

被引:13
|
作者
Xu, Junna [1 ,2 ]
Liu, Qing [1 ,2 ]
Lin, Shufeng [1 ,2 ]
Cao, Wenbin [1 ,2 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Dept Inorgan Nonmetall Mat, Beijing 100083, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
基金
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词
N-TiO2; Hydrothermal method; Photocatalysis; NITROGEN-CONCENTRATION DEPENDENCE; METHYLENE-BLUE; ANATASE;
D O I
10.1007/s11164-012-0899-9
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nanocrystalline N-doped TiO2 powders were successfully prepared by hydrothermal reaction for 2 h at low temperature (120 A degrees C) and at an applied pressure of 3 MPa. The grain size of the powders (calculated by use of Scherrer's method) ranged from 8.2 to 10.2 nm. The BET specific surface area ranged from 151.0 to 220.0 m(2)/g. A significant shift of the light absorption edge toward the visible light zone was observed in the UV-visible spectra. XPS results showed that nitrogen atoms were incorporated into the TiO2 lattice. The photocatalytic activity of the synthesized N-doped TiO2 powders was evaluated by measurement of photodegradation of methylene blue (MB) in aqueous solution under visible light irradiation. The amount of MB degraded increased with increasing illumination intensity.
引用
收藏
页码:1655 / 1664
页数:10
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