可见光驱动新型卟啉基多孔有机聚合物在中性 pH 下光芬顿降解有机污染物。
Visible-light-driven photo-Fenton degradation of organic pollutants by a novel porphyrin-based porous organic polymer at neutral pH.
机构信息
School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China.
School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, China; Shandong Product Quality Inspection Research Institute, Jinan, Shandong, 250100, China.
出版信息
Chemosphere. 2020 Mar;243:125334. doi: 10.1016/j.chemosphere.2019.125334. Epub 2019 Nov 9.
Developing novel heterogeneous photo-Fenton catalysts with high efficiency and stability, driven by visible-light rather ultraviolet light at neutral pH has been a major challenge for degradation of organic pollutants. In this work, we successfully synthesized a metalloporphyrin-based porous organic polymer (FePPOP-1) by the Sonogashira cross-coupling reaction. UV-vis absorption spectra showed FePPOP-1 exhibits a significant coverage of the natural solar irradiance spectrum. As a result, the prepared FePPOP-1 has a significantly enhanced photocatalytic activity for the visible-light-driven degradation of methylene blue. By using only 4 mg of FePPOP-1 as a catalyst, it was found that 50 mL of organic wastewater containing 70 ppm MB could be totally degraded in 80 min even at neutral pH. The effects of the initial MB, HO concentrations, pH value and common ions on MB degradation were studied in detail. Both the catalytic mechanism of FePPOP-1 and the degradation route of MB were also proposed.
开发高效稳定的新型异质光芬顿催化剂，在中性 pH 值下由可见光而非紫外光驱动，一直是降解有机污染物的主要挑战。在这项工作中，我们通过 Sonogashira 交叉偶联反应成功合成了一种基于金属卟啉的多孔有机聚合物（FePPOP-1）。紫外-可见吸收光谱表明，FePPOP-1 显著覆盖了自然太阳辐射光谱。因此，所制备的 FePPOP-1 在可见光驱动的亚甲基蓝降解中表现出显著增强的光催化活性。仅使用 4 mg 的 FePPOP-1 作为催化剂，发现在中性 pH 值下，50 mL 含有 70 ppm MB 的有机废水中的 MB 可以在 80 min 内完全降解。详细研究了初始 MB、HO 浓度、pH 值和常见离子对 MB 降解的影响。还提出了 FePPOP-1 的催化机制和 MB 的降解途径。
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