Advanced oxidation technology based on sulfate radical has great potential in the oxidation removal of refractory organic pollutants. Carbon materials with higher surface area, which are utilized to support transition metal catalyst such as Co, can effectively inhibit metal leaching and reduce the degree of secondary pollution. Herein, ZIF-67 as a Co source was doped in the polymer fiber matrixes of polyacrylonitrile and poly(methyl methacrylate), and CoO/Co/carbon nanofibers (CoO/Co/CNFs) composites with hollow structure was obtained after carbonization. The experimental results show that Co exists in the form of Co0 and Co2+ in the CoO/Co/CNFs. Using the CoO/Co/CNFs as Fenton catalysts and Rhodamine B as a simulated pollutant, the degradation rate of the pollutant could reach 95 % within 10 min. After five cyclic degradation tests, the degradation rates only slightly decreased. In addition, The (CoO/Co/CNFs)/PMS system also showed a remarkable ability to degrade methylene blue.

中文翻译：

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ZIF-67 作为 Co 源制备复合空心 CoO/Co/碳纳米纤维及其在高级氧化工艺中的应用


基于硫酸根自由基的高级氧化技术在难降解有机污染物的氧化去除方面具有巨大潜力。具有较高比表面积的碳材料用于负载 Co 等过渡金属催化剂，可有效抑制金属浸出，降低二次污染程度。本文以 ZIF-67 为Co源，掺杂在聚丙烯腈和聚甲基丙烯酸甲酯的聚合物纤维基体中，碳化后得到具有中空结构的 CoO/Co/碳纳米纤维 （CoO/Co/CNFs） 复合材料。实验结果表明，Co 以 Co0 和 Co2+ 的形式存在于 CoO/Co/CNFs 中，使用 CoO/Co/CNFs 作为芬顿催化剂，以罗丹明 B 为模拟污染物，污染物的降解率可在 10 min 内达到 95 %。经过 5 次循环降解测试后，降解率仅略有下降。此外，（CoO/Co/CNFs）/PMS 系统也显示出显着的降解亚甲基蓝的能力。