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• 作者：Jinqing Jiao ; Yuechang Wei ; Zhen Zhao ; Jian Liu ; Jianmei Li ; Aijun Duan ; Guiyuan Jiang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：November 5, 2014
• 年：2014
• 卷：53
• 期：44
• 页码：17345-17354
• 全文大小：568K
• ISSN：1520-5045

文摘

3D ordered macroporous (3DOM) TiO₂ was synthesized by the method of colloidal crystal template (CCT) using tetrabutyl titanate as precursor solution, and the photocatalysts of the 3DOM TiO₂-supported CeO₂ nanolayer with different weight ratios of CeO₂ to TiO₂ were successfully prepared by the gas bubbling-assisted membrane precipitation (GBMP) method. The catalysts were systematically characterized by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), mercury intrusion porosimetry (MIP), X-ray photoelectron spectroscopy (XPS), UV鈥搗is diffuse reflectance spectroscopy (DRS), and photoluminescence spectra (PL). The slow light effect of photonic crystal (3DOM structure) can enhance absorption efficiency of solar irradiation. Moreover, the introduction of CeO₂ nanolayers can effectively extend the photoresponse from UV to visible region and improve the separation of photogenerated electron鈥揾ole pairs. The photocatalytic activities for the reduction of CO₂ with H₂O were evaluated by the production of main product (CO). 3DOM CeO₂/TiO₂ photocatalysts exhibit high catalytic activity for the photocatalytic reduction of CO₂ with H₂O under simulated solar irradiation.