Photocatalytic Redox Performance of Copper Modified TiO2 Coupling with SnO2

doi:10.7517/j.issn.1674-0475.2006.05.366

Abstract

Abstract: TiO₂ coupling with SnO₂ was modified by impregnation method with aqueous solution of Cu(NO₃)₂ under ultrasonic irradiation,followed by calcinations at 450 ℃.The photocatalytic activity of the catalysts was evaluated using the reaction of photocatalytic oxidation of acetic acid as well as formaldehyde,and photocatalytic reduction of CO₂.The results show that the photocatalytic activity of TiO₂ can be improved either by copper modified or coupling with SnO₂.One of the two improvement methods is enhanced by the other.The catalysts were characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM).The mechanism for the improvement of CuO_x-SnO₂/TiO₂ state was discussed and the possible route of photocatalytic reduction of CO₂ was proposed.

Key words: coupled semiconductor, photocatalytic redox, acetic acid, copper modified, formaldehyde, carbon dioxide

CLC Number:

WU Shu-xin, YIN Yan-hua, MA Zhi, QIN Yong-ning. Photocatalytic Redox Performance of Copper Modified TiO₂ Coupling with SnO₂[J]. Imaging Science and Photochemistry, 2006, 24(5): 366-376.

References

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Photocatalytic Redox Performance of Copper Modified TiO₂ Coupling with SnO₂

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