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首页> 外文期刊>Catalysts >Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole
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Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole

机译：Ag和Agi改性ZnO与模拟阳光的异烯光催化剂的比较驱动了甲硝唑的光降解

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Ag and AgI-modified ZnO composites (Ag/ZnO and AgI/ZnO) were synthesized in facile ways. The photocatalysts were used for the photodegradation of metronidazole (MNZ) under the irradiation of simulated sunlight. The results of experiments showed that both Ag/ZnO and AgI/ZnO had a specific molar ratio to reach the best performance. Ag/ZnO performed better in the photodegradation of MNZ than AgI/ZnO under the same conditions. The reaction rate constant of AgI/ZnO was less affected by the variation of initial concentration of MNZ or pH values. The main reactive oxygen species of the photocatalytic process are OH, O 2 ? and h + , but the free radicals which play the most critical part differ in Ag/ZnO and AgI/ZnO. Several intermediates were revealed by LC–MS/MS analysis. The stability of the photocatalysts was evaluated by a series of repeated MNZ photodegradation experiments. The results showed that AgI/ZnO had better stability than Ag/ZnO.
机译：AG和AGI改性的ZnO复合材料（AG / ZnO和AGI / ZnO）以容易方式合成。在模拟阳光照射下，光催化剂用于在辐射下甲硝唑（MNZ）的光降解。实验结果表明，Ag / ZnO和Agi / ZnO均具有特定的摩尔比以达到最佳性能。在相同条件下，Ag / ZnO在MNZ的光降解中表现更好。 AGI / ZnO的反应速率常数受MnZ或pH值的初始浓度变化的影响。光催化过程的主要活性氧物质是哦，O 2？和H +，但是在AG / ZnO和AGI / ZnO中起最关键部分的自由基不同。通过LC-MS / MS分析揭示了几种中间体。通过一系列重复的MNZ光降解实验评价光催化剂的稳定性。结果表明，AGI / ZnO具有比Ag / ZnO更好的稳定性。

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