Crystalline Mixed Phase (Anatase/Rutile) Mesoporous Titanium Dioxides for Visible Light Photocatalytic Activity

2014 ◽  
Vol 27 (1) ◽  
pp. 6-17 ◽  
Author(s):  
Zhu Luo ◽  
Altug S. Poyraz ◽  
Chung-Hao Kuo ◽  
Ran Miao ◽  
Yongtao Meng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Mixed Phase ◽  
Visible Light Photocatalytic Activity ◽  
Titanium Dioxides ◽  
Visible Light Photocatalytic

Influence of Ytterbium Doping on the Visible Light Photocatalytic Activity of Mixed Phase TiO2 Nanoparticles

2019 ◽  
Vol 807 ◽  
pp. 18-25
Author(s):  
Fu Chang Peng ◽  
Qi Lai ◽  
Can Yu Zhong ◽  
Yan Cui ◽  
Xian Jie Liao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Phase Transfer ◽  
Photogenerated Electron ◽  
Mixed Phase ◽  
Fluorescent Light ◽  
Experimental Conditions ◽  
Visible Light Photocatalytic Activity ◽  
Ytterbium Doping ◽  
Visible Light Photocatalytic

The TiO2 nanoparticles with different Yb doping amount were prepared by a facile sol-gel method. The samples were characterized by XRD, TEM, XPS, UV-Vis, and PL, etc. The influence of Yb-doping on structure and visible light photocatalytic activity of mixed phase TiO2 was evaluated by photocatalytic degradation of methylene blue (MB) under the irradiation of fluorescent lamp. The results show that ytterbium appeared two kinds of Yb3+ and Yb2+ valence state on the surface of TiO2. Ytterbium doping can restrain the phase transfer from anatase to rutile, prevent the grain growth, and increase the surface hydroxyl content. Appropriate amount of Yb doping and the proportions of rutile and anatase mixed phase can effectively inhibit the recombination of photogenerated electron and hole, expand the wavelength range of absorption spectrum, and improve the photocatalytic performance of TiO2. Meanwhile, the photocatalytic activity of the Yb-TiO2 samples was the best under the irradiation of fluorescent light when the sintered temperature T=500°C and n(Yb):n(Ti)=0.009, it was 95.2% within 6 h and significantly higher than 56.4% of pure TiO2 under the same experimental conditions.

Facile formation of mesoporous structured mixed-phase (anatase/rutile) TiO2 with enhanced visible light photocatalytic activity

2018 ◽  
Vol 54 (1) ◽  
pp. 58-61 ◽  
Author(s):  
Weiwei Fu ◽  
Guode Li ◽  
Yu Wang ◽  
Shangjing Zeng ◽  
Zhuojun Yan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Calcination Temperature ◽  
Mixed Phase ◽  
Rutile Tio2 ◽  
Visible Light Photocatalytic Activity ◽  
Visible Light Photocatalytic

A new mesoporous anatase/rutile TiO2 nanocomposite was synthesized at a lower calcination temperature, and exhibited a higher visible light photocatalytic activity.

scholarly journals Synergistic Effects of Sm and C Co-Doped Mixed Phase Crystalline TiO2 for Visible Light Photocatalytic Activity

Materials ◽  
2017 ◽  
Vol 10 (2) ◽  
pp. 209 ◽  
Author(s):  
Fuchang Peng ◽  
Honglin Gao ◽  
Genlin Zhang ◽  
Zhongqi Zhu ◽  
Jin Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Synergistic Effects ◽  
Mixed Phase ◽  
Visible Light Photocatalytic Activity ◽  
Co Doped ◽  
Visible Light Photocatalytic
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