Removal of organic dye by air and macroporous ZnO/MoO₃/SiO₂ hybrid under room conditions

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• 作者：Mengjia Yuan^a ; Shengtian Wang^b ; ^{wangst706@nenu.edu.cn"" rel=""nofollow} ; Xiaohong Wang^a ; ^{wangxh665@nenu.edu.cn"" rel=""nofollow} ; ^{wxh.wangxiaohong665@yahoo.com.cn"" rel=""nofollow} ; Lingling Zhao^a ; Tianhong Hao^a
• 关键词：Catalytic wet air oxidation ; Organic dye ; Degradation ; Heterogeneous catalysis
• 刊名：Applied Surface Science
• 出版年：2011
• 出版时间：1 July 2011
• 年：2011
• 卷：257
• 期：18
• 页码：7913-7919
• 全文大小：889 K

文摘

A new macroporous ZnO/MoO₃/SiO₂ hybrid was synthesized by a method involving sol–gel technology and biomimetic synthesis. It was characterized by Elemental analysis, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS) and scanning electron microscopy (SEM). Chemical degradation of 0.3 g/L Safranin T (ST) by air oxidation over macroporous ZnO/MoO₃/SiO₂ hybrid was studied. It was found that the decolorization efficiency and the chemical oxygen demand (COD) removal of ST reached above 95.3 % and 93.2 % , respectively, within 25 min at room temperature and atmospheric pressure. And the organic pollutant was mineralized to simple inorganic species such as HCO₃⁻, Cl⁻ and NO₃⁻, while the total organic carbon (TOC) decreased 95.4 % . The structure and morphology of the catalyst were still stable after six cycling runs and the leaching test showed negligible leaching effect.