Herein, novel 3D hollow-carved Co₂C-doped CoAl₂O₄ fiber composites (3D-CA-FC) were successfully synthesized via a simple-green pyrolysis method and exhibited remarkably outstanding elimination performance for tetracycline (TC) by adsorption and degradation. The results indicated that the TC adsorption process of the samples could be accurately described by the pseudo-second-order and Langmuir isothermal model, and the maximum TC uptake reached up to 1889.63 mg/g under neutral conditions. Meanwhile, 3D-CA-FC showed good affinity for TC and its adsorption capacity was greatly promoted due to the presence of humic acid, CO₃^2- ion and weakly alkaline environment. About complete degradation of TC could be completed within 60 min under suitable conditions. A significant improvement of catalyst rate was observed after the addition of CO₃^2- ion, because of the selective degradation of CO₃^•- to TC. BET, XPS and FT-IR analysis indicated that the mechanisms of TC uptake can be ascribed to pore-filling, H-bonds and complexation. Radical trapping experiments showed that ¹O₂ should serve as predominant contributions, and SO₄^•- and •OH also played a role in the degradation process. This study provides some inspiration for the construction of 3D-CA-FC as a novel and promising bifunctional material for the elimination of contaminants in water treatment.

在此，通过简单的绿色热解方法成功合成了新型3D空心雕刻Co ₂ C掺杂CoAl ₂ O ₄纤维复合材料（3D-CA-FC），并通过吸附和降解对四环素（TC）表现出显着的消除性能。 . 结果表明，样品的TC吸附过程可以用准二级和Langmuir等温模型准确描述，中性条件下TC的最大吸收量达到1889.63 mg/g。同时，3D-CA-FC对TC表现出良好的亲和力，由于腐植酸CO ₃ ^{2-的存在，其吸附能力大大提高。}离子和弱碱性环境。在合适的条件下，大约60分钟内可以完成TC的完全降解。_{由于CO 3} ^•-对TC的选择性降解，在添加CO ₃ ^2-离子后观察到催化剂速率显着提高。BET、XPS和FT-IR分析表明，TC的吸收机制可归因于孔隙填充、氢键和络合。自由基捕获实验表明¹ O ₂应作为主要贡献，而 SO ₄ ^•-和•OH 在降解过程中也发挥了作用。该研究为构建 3D-CA-FC 作为一种新型且有前途的双功能材料用于消除水处理中的污染物提供了一些启示。