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Citation: ZHANG Xiao-Yan, CUI Xiao-Li. Preparation and Photocatalytic Hydrogen Evolution Performance of C-N Co-doped Nano TiO₂ Photocatalysts[J]. Acta Physico-Chimica Sinica, ;2009, 25(09): 1829-1834. doi: 10.3866/PKU.WHXB20090905 shu

Preparation and Photocatalytic Hydrogen Evolution Performance of C-N Co-doped Nano TiO₂ Photocatalysts

1.
Department of Materials Science, Fudan University, Shanghai 200433, P. R. China

Received Date: 17 January 2009
Available Online: 8 July 2009

Carbon-nitrogen co-doped titanium dioxide (TiO2) nanoparticles were synthesized by calcining titanium carbonitride (TiCN) powder in air at different temperatures. The as-prepared powders were characterized by X-ray diffraction (XRD), transmission electron microscopy(TEM), ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS), and X-ray photoelectron spectroscopy (XPS). XRDand XPS results showed that nitrogen and carbon in the TiCN lattice could be replaced by oxygen through calcining the TiCN powder in air. Stronger light absorption in both the UV and visible light region was observed for the as-prepared powders compared to commercial P25 from the DRS results. The photocatalytic hydrogen evolution performance over both the as-prepared catalysts and P25 was tested using Na2S-Na2SO3 as a sacrificial electron donor under UV and UV-Vis light irradiation. The highest photocatalytic activity was observed for CN-TiO2 obtained fromTiCNand calcined at 550 ℃. The hydrogen evolution rate reached 41.1 μmol·h-1, which is higher than that from P25 (26.2 μmol·h-1). This may be caused by a synergistic effect between doped C and N elements. Under UV-Vis light illumination, the highest hydrogen evolution rate was 0.2 μmol·h-1, which may be due to a minor contribution of visible light absorption to water photo-splitting for hydrogen production.
- Photocatalysis,
- C-N co-doped titaniumdioxide,
- Titaniumcarbonitride,
- Hydrogen evolution
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沈阳化工大学材料科学与工程学院沈阳 110142

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Preparation and Photocatalytic Hydrogen Evolution Performance of C-N Co-doped Nano TiO₂ Photocatalysts