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Supervisor : Xin Feng

Photocatalytic Reduction of Carbon Dioxide Using Heterostructure CdS-TiO 2 Photocatalyst to Hydrocarbon. Supervisor : Xin Feng. Reporter ： Song Guixian. 2013/03/27. Contents. Photocatalytic reduction of CO 2 reaction process. Selected catalyst. Scheme of prepared catalyst.

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Supervisor : Xin Feng

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  1. Photocatalytic Reduction of Carbon Dioxide Using HeterostructureCdS-TiO2Photocatalyst to Hydrocarbon Supervisor : XinFeng Reporter：Song Guixian 2013/03/27

  2. Contents • Photocatalytic reduction of CO2reaction process • Selected catalyst • Scheme of prepared catalyst • Catalyst preparation • Next plans

  3. Photocatalytic reduction of CO2reaction process

  4. Photocatalytic reduction of CO2reaction process

  5. Selected catalyst Oxidation process of cyclohexanol Reduction process of carbon dioxide

  6. Selected catalyst HeterostructureCdS-TiO2photocatalyst • CdS with band gap of 2.4 eV （CB，-1.0V；VB，1.4V，vs NHE at pH =7.0），TiO2 with band gap of 3.2eV （CB，-0.5V；VB，2.7V，vs NHE atpH =7.0） Fig.1. The mechanism of photocatalytic reduction of CO2

  7. Scheme of prepared catalyst Fig.2. The grow process of heterostructure CdS-TiO2photocatalyst

  8. Catalyst preparation Prepared TiO2 Tetrabutyltitanate +acetic acid Precursor solution Hydrothermal synthesis Centrifugation Dry Product Calcination to Detach impurity

  9. Catalyst preparation Prepared CdS-TiO2 Titanium dioxide + deionized water Ultrasonic dispersion Stir Precursor solution In situ hydrothermal Centrifugation CdCl2 ·2.5H2O aqueous solution Na2S ·9H2O aqueous solution Dry Product

  10. Characterization of UV–vis absorbance spectra Fig. 3. The UV–visible diffuse reflectance spectra of the samples

  11. Next plans 1.Optimization of reaction conditions adopt single factor experiment. • 2.The samples will be characterized on SEM、TEM、XRD、PL. • 3.Photocatalytic reduction of CO2 reaction will be carried out. 4.Product will be analyzed by GC-MS and GC.

  12. Thank You for your attention !

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