MnOx/介孔γ-Al2O3催化臭氧化降解水中安替比林的研究
Catalytic ozonation of phenazone on MnOx/mesoporous γ-Al2O3 in water
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摘要: 以自制的介孔γ-Al2O3为载体,通过等体积浸渍法合成了MnOx/介孔γ-Al2O3催化剂。采用X射线衍射(XRD)、透射电镜 (TEM) 以及紫外可见漫反射(UV-Vis DRS)等手段对其进行表征。结果表明,锰氧化物在介孔氧化铝载体上具有较高的分散度,并且锰以多种价态存在。高度分散以及多价态的MnOx能够提高催化臭氧化过程中电荷转移,引起更高
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关键词:
- 催化氧化 /
- 臭氧氧化 /
- MnOx/介孔γ-Al2O3 /
- 安替比林 /
- 矿化
Abstract: MnOx/mesoporous γ-Al2O3 was prepared by impregnation method using synthetic mesoporous γ-Al2O3 as the support. The obtained catalyst was characterized by X-ray diffraction (XRD),transmission electron microscopy (TEM) and UV-Vis diffuse reflectance spectra (UV-Vis DRS). The results reveal that MnOx is highly dispersed on mesoporous γ-Al2O3 and exists as the multivalence oxidation states. The high dispersion and multivalence oxidation states of MnOx enhance the interfacial electron transfer in the ozonation process,resulting in the higher catalytic activity. The presence of MnOx/mesoporous γ-Al2O3 catalyst significantly improves the mineralization efficiency of phenazone aqueous solution compared to non-catalytic ozonation. The total organic carbon (TOC) of the solution is almost completely removed at 60 min at the phenazone concentration of 10 mg/L. -

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