The role of dissolved oxygen in the Ta(O)N-driven visible Fenton-like degradation of atrazine
The role of dissolved oxygen in the Ta(O)N-driven visible Fenton-like degradation of atrazine
复制标题
溶解氧在 Ta(O)N 驱动的莠去津可见芬顿降解中的作用
DOI：
10.1016/j.jece.2014.06.005
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发表时间：
2014-09
影响因子：
7.7
通讯作者：
Bian Wenjuan
中科院分区：
文献类型：
--
作者：
Zhang Yuanyuan;Du Yingxun;Liu Deqi;Bian Wenjuan
详细研究了溶解氧（DO）在Ta（O）N驱动的阿特拉津类Fenton降解过程中的作用。首先，通过氮化Ta 2 O 5纳米颗粒制备了Ta（O）N样品，其在300-600 nm范围内表现出强吸收。其次，比较了可见光Ta（O）N-Fenton类体系在有DO和无DO条件下对莠去津的降解、H2 O2的分解以及中间产物的生成。在可见光Ta（O）N-Fenton类体系中，阿特拉津的降解主要是基于·OH的进攻，且在DO存在和不存在的情况下，阿特拉津的降解途径相似.然而，值得注意的是，DO的存在抑制阿特拉津降解。研究了DO对Ta（O）N催化Fe ~（3+）光还原和H_2O_2光分解的影响。结果表明，DO的存在抑制了Fe ~（2+）的生成，但不影响H_2O_2的分解。因此，DO的存在减缓了·OH的产生。在此基础上，提出了可见光Ta（O）N-Fenton类体系降解阿特拉津过程中DO的作用。
The role of dissolved oxygen (DO) in a visible Fenton-like degradation of atrazine driven by Ta(O)N was examined in detail. First, Ta(O)N samples were prepared by the nitridation of Ta2O5nanoparticles, which showed strong absorption in the range of 300–600 nm. Second, the degradation of atrazine, the decomposition of H2O2, and the formation of intermediates in the visible Ta(O)N-Fenton-like system in the presence of DO were compared with those in the absence of DO. In the visible Ta(O)N–Fenton-like system, atrazine degradation was based on the attack of•OH and the atrazine degradation pathways were similar in the presence and absence of DO. Notably, however, the presence of DO suppressed atrazine degradation. An investigation into the effects of DO on the photoreduction of Fe3+and the photodecomposition of H2O2catalyzed by Ta(O)N showed that the presence of DO suppressed the formation of Fe2+but did not affect the decomposition of H2O2. Therefore, the presence of DO slowed the generation of•OH. The role of DO in atrazine degradation by a visible Ta(O)N-Fenton-like system was proposed on the basis of the experimental results.
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影响因子：
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作者：
G. G. Jayson-G.;J. P. Keene;D. Stirling;A. Swallow
通讯作者：
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影响因子：
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通讯作者：
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