Efficient visible light photocatalytic activity and enhanced stability of BiOBr/Cd(OH)2 heterostructures

The large intrinsic band gap in TiO2has hindered severely its potential application for visible-light irradiation, while anion doping has led to decreases in visible-light photocatalytic activity in spite of narrowing the host band gap. In this study, we have used cation-passivated codoping of (C, F), (C, 2F) and (2C, F) to modify the band edges of anatase TiO2to extend absorption to longer visible-light wavelegenths using the density functional theory based on GGA + U method. The results indicate that the codoping of C/F=1/1 cases have much more efficient and stable photocatalyst than pristine one and the others, which narrow the band gaps and realize the visible-light response activities.

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Electrospun Porous Ta3N5 Nanorods with Enhanced Visible Light Photocatalytic Activity

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.955-959.84 ◽

2014 ◽

Vol 955-959 ◽

pp. 84-87

Author(s):

Shi Jie Li ◽

Li Sha Zhang ◽

Jun Lei Zhang ◽

Hui Hui Zhao ◽

Fei Huang ◽

...

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Light Response ◽

Methyl Blue ◽

Visible Light Photocatalytic Activity ◽

Visible Light Response ◽

Recyclable Photocatalyst ◽

Visible Light Photocatalytic

In this study, porous Ta3N5 nanorods were sucessfully fabricated via electrospinning-calcination-nitridation method. The porous Ta3N5 nanorods are composed of Ta3N5 nanoparticles with diameters ranging from 30 nm to 80 nm. The porous Ta3N5 nanorods show significantly enhanced photocatalytic activity for the degradation of Methyl blue (MB) under visible light than commercial Ta3N5. Importantly, The porous Ta3N5 nanorods can be used as an easily recyclable photocatalyst with wide visible-light response.

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Enhanced visible light photocatalytic activity of anatase TiO2 through C, N, and F codoping

Canadian Journal of Physics ◽

10.1139/cjp-2013-0036 ◽

2014 ◽

Vol 92 (1) ◽

pp. 71-75 ◽

Cited By ~ 6

Author(s):

Zongbao Li ◽

Wang Xia ◽

Lichao Jia

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Density Functional ◽

Light Response ◽

Anatase Tio2 ◽

Functional Theory ◽

Visible Light Response ◽

Elemental Doping ◽

Visible Light Photocatalytic ◽

Good Agreement

The electronic and optical properties of pure, C-doped, (C, F)-codoped, (C, N)-codoped, and (C, N, F)-codoped anatase TiO2 are investigated by using density functional theory (DFT). The results indicate that elemental doping creates a much more efficient and stable photocatalyst than pristine, which narrows the band gap of TiO2 and realizes its visible light response activity. With the incorporation of F into (C, N)-codoped TiO2, strong visible light absorption and photocatalytic activity are further increased. It also verifies the reliability of our calculations for good agreement with the experimental results in the optical absorption of (C, N)-codoped and (C, N, F)-codoped.

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