Durable sodium alginate hydrogel with hard-soft interpenetrating networks and directed electron flow: Toward pan-regional photo-Fenton-like catalysis for persistent antibiotic degradation

文献类型： 外文期刊

第一作者： Ouyang, Jiayu

作者： Ouyang, Jiayu;Lv, Wenzhuo;Wang, Canhui;Guo, Xin;Lv, Huiying;Wu, Yiqiang

作者机构：

关键词： Sodium alginate; Hydrogel; Adsorption; Photo-Fenton-like catalysis

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 520 卷

页码：

收录情况： SCI

摘要： Achieving a balance between catalytic efficiency and structural durability remains a key challenge in heterogeneous photo-Fenton-like systems. Herein, we report a robust sodium alginate hydrogel (ACCN) with hard-soft dual interpenetrating networks, constructed by incorporating Cu@MoS2 nanosheets and carbon dots-modified cellulose nanofibrils (CNF@CDs). This structural design enables pan-regional photo-Fenton-like catalysis via structural optimization and directed electron transport, thereby ensuring sustained ciprofloxacin (CIP) degradation. Three key features synergistically enhance both catalytic performance and material integrity: (1) a dual interpenetrating network comprising Cu2+-crosslinked sodium alginate (SA, soft phase) and hydrogen-bonded CNF@CDs (rigid phase), which reinforces mechanical strength and prevents Cu@MoS2 leaching; (2) the SA/ CNF@CDs network exhibits an ultrahigh CIP adsorption capacity, which spatially concentrates pollutants and accelerates reaction kinetics; and (3) CNF@CDs facilitates electron transfer from Cu@MoS2 to Cu2+ crosslinking sites, promoting pan-regional Cu2+/Cu+ redox cycling. This spatial-electronic integration endows ACCN with a CIP degradation rate constant of 0.0426 min-1-7.5-fold higher than that of Cu@MoS2. Furthermore, ACCN demonstrates excellent durability and reusability, maintaining over 95 % catalytic activity after 10 cycles, with Mo leaching below 8 ppb. This work provides a sustainable strategy for integrating structural and electronic modulation to enable high-efficiency, durable antibiotic wastewater treatment.

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