کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1277706 | 1497532 | 2013 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The optical absorption and hydrogen production by water splitting of (Si,Fe)-codoped anatase TiO2 photocatalyst The optical absorption and hydrogen production by water splitting of (Si,Fe)-codoped anatase TiO2 photocatalyst](/preview/png/1277706.png)
The electronic and optical properties are studied using the density functional theory in (Si,Fe)-codoped anatase TiO2. The calculated results suggest that the synergistic effects of (Si,Fe) codoping can effectively induce the redshift of optical absorption edge, which leads to higher visible-light photocatalytic activity for hydrogen production by water splitting than pure anatase TiO2. To verify the reliability of our calculated results, nanocrystalline (Si,Fe)-codoped TiO2 is synthesized by a sol-gel-solvothermal method, and excellent absorption performance and photocatalytic activity for hydrogen production by water splitting are observed in our experiments.
► Si doping TiO2 induces an obvious band gap narrowing by mixing O 2p with Si 3p.
► Fe doping TiO2 leads to a band gap narrowing and an impurity states Fe 3d appearing.
► Synergy of codoping TiO2 induces excellent photocatalytic activity for H2 production.
► Our calculated results are firstly verified by our experimental observation.
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 13, 1 May 2013, Pages 5209–5214