Synthesis and photocatalytic activity of porous anatase TiO2 microspheres composed of {010}-faceted nanobelts

2013 ◽  
Vol 42 (13) ◽  
pp. 4365 ◽  
Author(s):  
Jun Zhao ◽  
Xiao-Xin Zou ◽  
Juan Su ◽  
Pei-Pei Wang ◽  
Li-Jing Zhou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Anatase Tio2 ◽  
Tio2 Microspheres

Synthesis and hydrogenation of anatase TiO2 microspheres composed of porous single crystals for significantly improved photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62907-62910 ◽  
Author(s):  
Jinan Niu ◽  
Shaishai Shen ◽  
Lu Zhou ◽  
Zhangsheng Liu ◽  
Peizhong Feng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Single Crystals ◽  
Anatase Tio2 ◽  
Facile Synthesis ◽  
Tio2 Microspheres ◽  
Hydrogenation Effect

We developed a facile synthesis of anatase microspheres composed of porous single crystals in the absence of preseeding treatment, and examined the hydrogenation effect of porous TiO2 on the photocatalytic activity.

First-Principles Study on Electronic and Optical Properties in Pr-Doped Anatase TiO2

2014 ◽  
Vol 924 ◽  
pp. 260-268 ◽  
Author(s):  
Hao Chen ◽  
Lan Fang Yao ◽  
Song Lin Yang ◽  
Ya Qin Wang ◽  
Xing Liang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Photocatalytic Activity ◽  
First Principles ◽  
Energy Gap ◽  
Impurity Band ◽  
Anatase Tio2 ◽  
Electron Hole ◽  
Light Region ◽  
Overlap Population ◽  
Calculation Results

The crystal structures, band structures, density of states, charge density, overlap population and optical properties of pure anatase TiO2 and Pr-doped anatase TiO2 were studied by using the plane-wave pseudopotential method based on the first-principles. After Pr doping, the valence band and the conduction band moved down and became dense, energy gap became narrow and a impurity band which consists of Pr 4f states appeared. And the dipole moment got improved, which is good for the separate of the electron-hole pairs. These effectively overcome two huge shortcomings of TiO2. Besides, Pr-doped anatase TiO2 produced more carriers which have good transport properties and the absorption spectra of Pr-O bond appear in the region that the wavelength is longer. The calculation results of optical properties show that the absorption edge occured red shift, which means the photocatalytic activity of anatase TiO2 got remarkable improved during visible-light region. This conforms to the previous analysis. So the photocatalytic activity of anatase TiO2 got remarkable improved after Pr doping.

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