Monopersulfate oxidation of Acid Orange 7 with an iron(III)-tetrakis(N-methylpyridinium-4-yl)porphyrin intercalated into the layers of montmorillonite and pillared clay
Monopersulfate oxidation of Acid Orange 7 with an iron(III)-tetrakis(N-methylpyridinium-4-yl)porphyrin intercalated into the layers of montmorillonite and pillared clay
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DOI：
10.1016/j.molcata.2014.09.035
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发表时间：
2015
影响因子：
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通讯作者：
R. Nishimoto;Qianqian Zhu;Takafumi Miyamoto;Tsutomu Sato;Xuefei Tu;Apichaya Aneksampant;M. Fukushima-
中科院分区：
文献类型：
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作者：
R. Nishimoto;Qianqian Zhu;Takafumi Miyamoto;Tsutomu Sato;Xuefei Tu;Apichaya Aneksampant;M. Fukushima-
将铁(III)-四（n -甲基吡啶-4-基）卟啉（FeTMPyP）作为仿生催化剂，负载于蒙脱土（Mt）和柱状粘土（Pi）中。比较了制备的催化剂在废水中主要成分腐植酸（HA）存在和不存在的情况下对酸性橙7 （AO7）脱色的催化活性。携带fetmpyp的Pi的周转频率（TOFs） （6.7-9.4 h−1）大于携带fetmpyp的Mt (2.9-3.3 h−1)，而携带fetmpyp的Mt在HA存在下的脱色受到抑制（TOFs为1.3-2.1 h−1）。这些结果可以归因于这样一个事实，即Mt的基间距的大扩张允许催化剂被洗脱，并且HA被插入到Mt层中。然而，在使用较小的OH/Al和Al/Mt比例制备的fempyp负载Pi催化剂的情况下，催化剂洗脱水平和HA对AO7脱色的抑制作用被显著抑制。这些结果表明Pi比Mt更适合作为FeTMPyP催化剂的载体。
A biomimetic catalyst, iron(III)-tetrakis(N-methylpyridinium-4-yl)porphyrin (FeTMPyP), was loaded into montmorillonite (Mt) and pillared clay (Pi). The catalytic activities of the prepared catalysts for the decolorization of Acid Orange 7 (AO7) in the absence and presence of humic acid (HA), a major component of waste water, were compared. Turnover frequencies (TOFs) for the FeTMPyP-loaded Pi (6.7–9.4 h−1) were larger than those for the FeTMPyP-loaded Mt (2.9–3.3 h−1), while decolorization for the FeTMPyP-loaded Mt was inhibited in the presence of HA (TOFs of 1.3–2.1 h−1). These results can be attributed to the fact that the large expansion in basal spacing for the Mt permitted the catalyst to be eluted and HA to be inserted into the Mt layer. However, the levels of catalyst elution and the inhibition of AO7 decolorization by HA were significantly suppressed in the case of the FeTMPyP-loaded Pi catalyst, which was prepared using smaller OH/Al and Al/Mt ratios. These results indicate that the Pi is more suitable support for the FeTMPyP catalyst than the Mt.