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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,引起更高的催化活性。MnOx/介孔γ-Al2O3催化剂能够有效地提高臭氧对水中安替比林的矿化效果,对含量为10 mg/L的安替比林水溶液在反应60 min后基本达到完全矿化。
The MnOx / mesoporous γ-Al2O3 catalysts were synthesized by self-made mesoporous γ-Al2O3 as the support. X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) were used to characterize this material. The results show that the manganese oxide has a higher dispersion on the mesoporous alumina support, and the manganese exists in various valence states. Highly dispersed and multivalent MnOx can improve the charge transfer during catalytic ozonation and lead to higher catalytic activity. The MnOx / mesoporous γ-Al2O3 catalyst can effectively improve the mineralization effect of ozone on the water of antipyrine. Almost all the mineralization of the antipyrine aqueous solution with the content of 10 mg / L was achieved 60 min after the reaction.