Development of attapulgite/Ce_{1鈭?span style='font-style: italic'>x}Zr_xO₂ nanocomposite as catalyst for the degradation of methylene blue

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• 作者：Xiazhang Li^a ; ^b ; ^{xiazhang@cczu.edu.cn} ; Chaoying Ni^c ; ^cni@udel.edu ; Chao Yao^a ; Zhigang Chen^d
• 关键词：Attapulgite ; Cerium oxide ; Methylene blue ; Catalytic activity
• 刊名：Applied Catalysis B ; Environmental
• 出版年：2012
• 期刊代码：4_09263373
• 类别：ce
• 出版时间：18 May, 2012
• 卷：117-118
• 期：Complete
• 页码：118-124
• 文件大小：1869 K

摘要

Novel attapulgite (ATP)/Ce_1鈭?em>xZr_xO₂ nanocomposite was prepared by a facile homogeneous deposition method using hexamethylenetetramine as precipitator. The catalytic activity of ATP/Ce_1鈭?em>xZr_xO₂ was investigated by oxygenating methylene blue dye wastewater using O₃ as oxidant. HRTEM, XRD, FT-IR, Raman and H₂-TPR data reveal significant interactions between CeZrO oxides and ATP support, the evolution of textural, structural and oxidation state as a function of the composition, and the formation of more oxygen vacancies in Ce_1鈭?em>xZr_xO₂. The molar fraction of Zr⁴⁺ demonstrates considerable influence on the degradation rate of the methylene blue. Compared with pure ATP and ATP/CeO_2, the ATP/Ce_1鈭?em>xZr_xO₂ composite remarkably enhances catalytic activity, and a maximum degradation rate of methylene blue at 99%is achieved when the molar fraction x is 0.2.