Fe/MCM-41催化臭氧氧化水中对氯苯甲酸

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Catalytic ozonation of p-CBA in aqueous solution over Fe/MCM-41

摘要: 利用水热法合成介孔材料MCM-41及Fe负载的MCM-41（Fe/MCM-41），并通过催化臭氧氧化水中对氯苯甲酸（p-CBA）考察其催化性能.经过X射线粉末衍射（XRD）、紫外可见漫反射光谱（DR UV-Vis）、傅立叶红外光谱（FT-IR）及比表面（BET）表征，表明所合成的MCM-41及Fe/MCM-41具有较规则的六方孔道结构及较大的比表面积.MCM-41与Fe/MCM-41的加入有利于p-CBA和TOC的去除，其中Fe/MCM-41与O3具有协同效应，表现出较好的催化活性.
- 催化臭氧氧化
Abstract: The catalytic activity of MCM-41 and Fe loaded MCM-41 (Fe/MCM-41) for ozonation of p-chlorobenzoic acid (p-CBA) in aqueous solution was investigated. MCM-41 and Fe/MCM-41 were synthesized by a direct hydrothermal method and characterized by XRD, DR UV-Vis and FT-IR. The results showed that MCM-41 and Fe/MCM-41 presented mesoporous hexagonal structure with large surface area. The presence of MCM-41 and Fe/MCM-41 improved the p-CBA and TOC removal in the ozonation process, while Fe/MCM-41 showed better catalytic activity because of its synergistic effect with O3. The TOC (p-CBA) removal efficiency in Fe/MCM-41/O3 process was 51.4% (86.6%) at 60 (30) min, 39.4 % (79.4%) using MCM-41 as catalyst, only 35.4% (72.1%) with ozone alone.
- catalytic ozonation