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Citation: Wu ShuXin, Ma Zhi, Qin Yong-Ning, Qi Xiao-Zhou, Liang Zhen-Cheng. Photocatalytic Redox Activity of Doped Nanocrystalline TiO₂[J]. Acta Physico-Chimica Sinica, ;2004, 20(02): 138-143. doi: 10.3866/PKU.WHXB20040206 shu

Photocatalytic Redox Activity of Doped Nanocrystalline TiO₂

1.
School of Chemical Engineering and Technology， Tianjin University，Tianjin　300072; United Institute of Nankai University and Tianjin University, Tianjin　300072; State Key Laboratory of C1 Chemical Technology of Tianjin University, Tianjin　300072

Received Date: 11 June 2003
Available Online: 15 February 2004

A set of nanometer TiO2 photocatalysts doped with various ions of transition metals (Cr、Mn、Fe、Co、Ni、and Cu) was prepared by using the wet impregnation method. The samples were characterized by using some bulk and surface techniques namely X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The samples were employed as catalysts for acetic acid photocatalytic oxidation degradation and carbon dioxide photocatalytic reduction in aqueous suspension, used as probe reactions. The characterization results have confirmed that the doping ions exist on the surface in the form of oxide and have no significant effect on crystal phase of the samples. Photocatalytic activities of the doped samples were improved in the order of Cr、Co、Ni、Fe、Mn、Cu. The photocatalytic activity of doped TiO2 appears to be a complex function of the dopant concentration, adsorption oxygen and the nature of doped ions.
- Immersion methods;Transition metal ions;Doped;Nanocrystalline TiO₂;XPS
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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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Photocatalytic Redox Activity of Doped Nanocrystalline TiO2

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通讯作者: 陈斌, bchen63@163.com

Photocatalytic Redox Activity of Doped Nanocrystalline TiO₂