In this study, CuO was modified with the boric acid (H3BO3) by hydrothermal method to form a new catalyst of H3BO3-CuO for peroxymonosulfate (PMS) activation. Multilayer superimposed nanostructures were observed on the surface of H3BO3-CuO, with pore size 3 times larger than that of CuO, which facilitated the provision of an increased number of active sites. The elimination rate of 20 μM ibuprofen (IBP) reached 98.3 % by 0.096 g/L H3BO3-CuO after 30 mins at pH 7.5, with less than 0.29 mg/L Cu2+ leaching. The kobs for pollutants degradation at pH 7.5 in H3BO3-CuO/PMS system was approximately 1.5–1.9 times higher compared to the kobs in CuO/PMS system. Quenching experiments conducted to assess the dominant species revealed that both ≡Cu(III) and superoxide radicals (O2−) played a crucial role, contributing significantly to the degradation process. Specifically, the contributions of ≡Cu(III) and O2− accounted for 91.89 % in the degradation of IBP, while the hydroxyl radical (⋅OH) contributed only 8.11 % to the overall degradation process. Acting as an electron acceptor, boron facilitated the generation of Cu(III) and ·OH, hence improving oxidation capacity of the catalyst. However, further assessment should be investigated to solve the secondary contamination and biotoxicity.

中文翻译：

---

硼嵌入 CuO 催化剂介导的增强过氧一硫酸盐活化过程：增强的性能和协同机制


在本研究中，通过水热法用硼酸 （H3BO3） 对 CuO 进行改性，形成一种新的 H3BO3-CuO 催化剂，用于过氧一硫酸盐 （PMS） 活化。在 H3BO3-CuO 表面观察到多层叠加纳米结构，孔径比 CuO 大 3 倍，这有利于提供更多的活性位点。在 pH 值为 7.5 的条件下，0.096 g/L H3BO3-CuO 对 20 μM 布洛芬 （IBP） 的去除率达到 98.3%，浸出量低于 0.29 mg/L Cu2+。与 CuO/PMS 系统中的 kobs 相比，H3BO3-CuO/PMS 系统中 pH 7.5 的污染物降解 kob 大约高 1.5-1.9 倍。为评估优势物质而进行的淬灭实验表明，≡Cu（III） 和超氧自由基 （O2−） 都起着至关重要的作用，对降解过程做出了重大贡献。具体来说，≡Cu（III） 和 O2− 在 IBP 降解中的贡献为 91.89%，而羟基自由基 （⋅OH） 对整个降解过程的贡献仅为 8.11%。作为电子受体，硼促进了 Cu（III） 和 ·OH，从而提高催化剂的氧化能力。然而，应进一步评估以解决二次污染和生物毒性。