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Citation: WANG Yu-Ping, WANG Lian-Jun, YUAN Jun-Xiu, PENG Pan-Ying, LU Tian-Hong. Influence of Mo Doping on Structure and Activity of Nanosized TiO₂[J]. Chinese Journal of Applied Chemistry, ;2007, 24(1): 53-57. shu

Influence of Mo Doping on Structure and Activity of Nanosized TiO₂

1.
a Schcool of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094;
2.
b School of Chemistry and Environmental Science, Nanjing Normal University, Nanjinga

Corresponding author: WANG Lian-Jun,
Received Date: 16 February 2006
Available Online: 10 May 2006
Fund Project: 江苏省高校自然科学研究指导项目(05KJD6010110)资助 (05KJD6010110)

The visible-light responding region was extended by Mo⁶⁺ doping because the doping of Mo⁶⁺ could introduce crystal cavities into TiO₂ nanoparticles and reduce its energy band gap.Effects of doping concentration on visible-light responding region, crystal phase, grain size and cell parameters of TiO₂ catalyzer were studied by means of UV-Vis, XRD, XPS and TG-DTA techniques, at the same time, the style of doping, valence state of doped ions and the physical and chemical reaction in the course of heating were also studied.The photocatalytic activity was evaluated by the photodegradation of methylene blue under visible-light radiation.It was found that the visible-light responding region and the photocatalytic activity of nanosized TiO₂ were affected by the doping amount.The UV-Visible absorption band of 4.5% Mo doped TiO₂ reached to about 460 nm, the removal efficiency of methylene blue was 58.3%, and TOC was 52.5%.For nano TiO₂ with 3.0% and 6.0% Mo doping, the removal of methylene blue were 56.6% and 52.0%, and TOC were 49.2% and 44.2%, and both of them had a ratio of 4:1 of anatase to rutile and smaller grain size.
- Mo-doping,
- doping amount,
- visible-light,
- photocatylysis
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Influence of Mo Doping on Structure and Activity of Nanosized TiO2

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通讯作者: 陈斌, bchen63@163.com

Influence of Mo Doping on Structure and Activity of Nanosized TiO₂