Synthesis of nano-TiO2 photocatalysts with tunable Fe doping concentration from Ti-bearing tailings

被引：29
作者：
Sui, Yulei [1 ,2 ]
Liu, Qingxia [2 ]
Jiang, Tao [1 ]
Guo, Yufeng [1 ]
机构：
[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Hunan, Peoples R China
[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
来源：
APPLIED SURFACE SCIENCE | 2018年 / 428卷
关键词：
Fe-doped nano-TiO2; Ti-bearing tailings; Photocatalysis; Visible light; SOL-GEL SYNTHESIS; DOPED TIO2; TITANIUM-DIOXIDE; NANOPARTICLES; ANATASE; DEGRADATION; PHOTOACTIVITY; NANOCRYSTALS; PHOTOLYSIS; BROOKITE;
D O I：
10.1016/j.apsusc.2017.09.197
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, highly pure nano-TiO2 photocatalysts with varying Fe doping concentration were successfully synthesized from low-cost Ti-bearing tailings by an acidolysis-hydrothermal route. The effects of H2SO4 concentration, leaching temperature, acid/tailings ratio and leaching time on the recovery of TiO2 from the tailings were investigated. Synthesized samples were characterized by XRD, TEM, EDS, XPS, and UV-vis spectroscopy. The results showed that the material prepared is characteristic anatase with the average size of 20 nm and the Fe doping concentration in the synthesized nano-TiO2 is tunable. The photocatalytic activity of synthesized nano-TiO2 photocatalyst was also evaluated by the photodegradation of Rhodamine B under visible light and UV light irradiation. Our study demonstrates a low-cost approach to synthesize highly efficient and visible light responsive catalysts. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：1149 / 1158
页数：10
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