Zhu Dancheng, Wu Yifan, Zheng Kai, Xu Hao, Chen Chao, Qiao Jun, Shen Chao
Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou, 310015, China.
Sci Rep. 2024 Apr 5;14(1):8068. doi: 10.1038/s41598-024-58893-z.
In this study, we deposited TiCT-modified, rare-earth-doped PbO on the surface of a carbon fabric via electrodeposition. The surface morphology and electronic structure of the electrode were characterized with SEM, XRD and XPS. The layered TiCT did not change the structure of β-PbO, and at the same time, it improved the crystallinity of the material and reduced the grains of PbO. Electrochemical experiments showed that the addition of TiCT increased the electrochemical activity of the electrode and produced more HO, which contributed to the degradation of pollutants. The efficiency of sulfamethoxazole (SMX) degradation reached 95% after 120 min at pH 3 with a current density of 50 mA/cm. Moreover, the electrode has good cycling performance, and the degradation efficiency was still 80% after 120 min after 10 cycles of recycling. Based on the intermediates identified by HPLC‒MS, a mechanism for SMX degradation was proposed. Our results will provide a new idea for the development of efficient electrocatalytic degradation of antibiotics.
在本研究中，我们通过电沉积将 TiCT 改性的稀土掺杂 PbO 沉积在碳纤维织物表面。采用扫描电子显微镜（SEM）、X 射线衍射仪（XRD）和 X 射线光电子能谱仪（XPS）对电极的表面形貌和电子结构进行了表征。层状 TiCT 没有改变β-PbO 的结构，同时提高了材料的结晶度并减小了 PbO 的晶粒尺寸。电化学实验表明，TiCT 的加入提高了电极的电化学活性并产生了更多的·OH，这有助于污染物的降解。在 pH 为 3、电流密度为 50 mA/cm² 的条件下，磺胺甲恶唑（SMX）在 120 min 后的降解效率达到 95%。此外，该电极具有良好的循环性能，在 10 次循环后的 120 min 后，降解效率仍为 80%。基于高效液相色谱-质谱联用（HPLC-MS）鉴定出的中间体，提出了 SMX 的降解机理。我们的研究结果将为开发高效电催化降解抗生素提供新思路。
