Kuznetsova E V, Savinov E N, Vostrikova L A, Echevskii G V
Group of Photocatalysis on semiconductors, Boreskov Institute of Catalysis, Pr.Ak.Lavrentieva, Novosibirsk 630090, Russia.
Water Sci Technol. 2004;49(4):109-15.
This paper deals with catalytic and photocatalytic oxidation of organic substances using H202 over heterogeneous Fenton-type catalysts. In the study a series of Fe-containing catalysts was experienced. A zeolite named as FeZSM-5 was selected as the most active heterogeneous Fenton-type catalyst. The FeZSM-5 reported was prepared by hydrothermal crystallization in the presence of iron salt. In contrast to the homogeneous Fenton system the catalyst prepared had minimal, if any, leaching of iron ions, was stable during 30 catalytic runs and didn't lose its activity in the presence of complexing agents, e.g. P2O7(4-). The catalyst was active in oxidation of organic substances at pH from 1.5 to 8, maximum activity was observed at pH = 3. The FeZSM-5 effectively oxidized a simulant of the warfare agent, diethylnitrophenil phosphate, which is hardly detoxified by other methods. It appeared that the rate of oxidation of formic acid, ethanol and benzene over FeZSM-5 increased under the action of visible light (lambda > 436 nm), quantum efficiency being 0.06-0.14.
本文研究了在非均相类芬顿催化剂作用下，利用过氧化氢对有机物质进行催化和光催化氧化的过程。在该研究中，对一系列含铁催化剂进行了试验。一种名为FeZSM-5的沸石被选为活性最高的非均相类芬顿催化剂。所报道的FeZSM-5是在铁盐存在下通过水热晶化法制备的。与均相芬顿体系不同，所制备的催化剂中铁离子的浸出极少（即便有也微乎其微），在30次催化运行过程中保持稳定，并且在存在络合剂（如P2O7(4-)）的情况下不会失去活性。该催化剂在pH值为1.5至8的范围内对有机物质的氧化具有活性，在pH = 3时观察到最大活性。FeZSM-5能有效氧化一种战争毒剂模拟物——磷酸二乙硝苯基酯，而该物质用其他方法很难解毒。结果表明，在可见光（λ > 436 nm）作用下，FeZSM-5对甲酸、乙醇和苯的氧化速率增加，量子效率为0.06 - 0.14。
