Photocatalytic activity of TiO2 sensitized by CdS quantum dots under visible-light irradiation |
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| Authors: | Liangliang Mao Wuzhou Jiang Lijuan He Pengfei Fang |
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| Affiliation: | MAO Liangliang,JIANG Wuzhou,HE Lijuan,FANG Pengfei School of Physics and Technology,Wuhan University,Wuhan 430072,Hubei,China |
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| Abstract: | In this paper, CdS quantum dots sensitized TiO2 composite powders (QD-CdS/TiO2) were synthesized by impregnating TiO2 powder into CdS sol with different concentrations. X-ray diffraction pattern (XRD) shows the crystal structures of CdS and TiO2 are cubic phase and anatase phase separately in QD- CdS/TiO2 powder samples; the crystal size of CdS in QD- CdS/TiO2 is about 3-7 nm, while TiO2 crystal size is about 20 nm. With increasing CdS content in QD-CdS/TiO2 composite, the UV-Vis absorption spectrum shifted... |
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| Keywords: | TiO2 CdS quantum-dots photocatalysis |
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