Cost-effective and efficient degradation of dissolved organic pollutants via intrinsic synergistic adsorption-photocatalysis of commercial activated carbon fiber

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-10-12 DOI:10.1016/j.apsusc.2025.164871

Hongyun Ren, Xia Qin, Xujie Lan, Xingwei Tao, Shan Wang, Mai Wang, Xiao Guo

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Abstract

This study explores the intrinsic photocatalytic activity of viscose-based activated carbon fibers (ACFs) and their synergistic adsorption-photocatalysis mechanism under visible light. Two commercial ACFs were pretreated, with one further oxidized using nitric acid. Tetracycline (TC) served as the model pollutant. Results revealed that adsorption capacity was positively correlated with defect density, while photocatalytic performance depended on the sp²-hybridized carbon content. After 90 min, TC removal efficiencies for adsorption and combined adsorption-photocatalysis were 17.6 %/91.3 % and 7.3 %/85.5 %, respectively. Excellent mineralization was also achieved, with COD/TOC removal rates of 85.1 %/85.4 % and 73.4 %/75 %. ACFs maintained high TC degradation over a wide pH range (3–9), and the superior sample achieved 99.4 % TC removal within 20 min at an aeration rate of 1.0 L/min. OH and O₂⁻ were identified as the dominant reactive oxygen species. The materials exhibited excellent regeneration capability through high-temperature calcination. Practical application tests confirmed their effectiveness under sunlight and against a range of organic pollutants. These results highlight the potential of pristine viscose-based ACFs as low-cost, sustainable materials for advanced wastewater treatment.

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通过商品活性炭纤维内在的协同吸附-光催化，经济高效地降解溶解的有机污染物

本研究探讨了粘基活性炭纤维（ACFs）固有的光催化活性及其在可见光下的协同吸附-光催化机理。对两种商用ACFs进行预处理，其中一种用硝酸进一步氧化。四环素（TC）是典型污染物。结果表明，吸附量与缺陷密度呈正相关，而光催化性能与sp2杂化碳含量有关。90 min后，吸附和联合吸附-光催化的TC去除率分别为17.6 %/91.3 %和7.3 %/85.5 %。矿化效果良好，COD/TOC去除率分别为85.1 %/85.4 %和73.4 %/75 %。ACFs在较宽的pH范围（3-9）内保持了较高的TC降解率，在1.0 L/min的曝气速率下，优质样品在20 min内达到99.4 %的TC去除率。OH和O2−是主要的活性氧。通过高温煅烧，材料表现出优异的再生能力。实际应用测试证实了它们在阳光下和对抗一系列有机污染物的有效性。这些结果突出了原始粘基ACFs作为低成本、可持续的高级废水处理材料的潜力。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.