纳米纤维Co3O4自组装层状无氟MXene的快速过氧单硫酸盐活化:抗生素降解和电子传递机制

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2023-10-01 DOI:10.1016/j.seppur.2023.125241

Feng Wang, Zhaoyong Bian, Yiyin Peng, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang

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引用次数: 1

摘要

本文将纳米纤维Co3O4与层状无氟MXene (Ff-Ti3C2Tx)自组装，制备了纳米纤维层状结构Ff-Ti3C2Tx-Co3O4。由于其独特的结构，Ff-Ti3C2Tx-Co3O4在4-10的pH范围内具有优异的催化降解活性(接近100%)，并且具有良好的抗离子干扰能力。采用真空过滤法制备Ff-Ti3C2Tx-Co3O4膜，通过220 mL磺胺甲恶唑(SMX)渗透到城市污水进水基质中，去除率保持在95%以上。此外，PMS分解与SMX降解呈线性相关，每毫摩尔PMS氧化0.425 mM SMX。同时，电子从Ff-Ti3C2Tx-Co3O4迅速转移到PMS，消耗HCO5−，产生亚稳态活性物质(Ff-Ti3C2Tx-Co3O4-PMS*)。SMX快速降解的机制涉及Ti2+/Ti3+⇋Ti4+和Co2+⇋Co3+氧化还原循环中快速的电子传递。再通过PMS→·O2−→1O2生成1O2。本研究为基于PMS活化的抗生素降解和电子转移机制的研究提供了新的启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Rapid peroxymonosulfate activation by self-assembly of layered fluorine-free MXene with nanofibrous Co3O4: Antibiotic degradation and electron transfer mechanism

Herein, nanofibrous Co3O4 was self-assembled with lamellar fluorine-free MXene (Ff-Ti3C2Tx) to prepare a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4. Benefiting from the unique structure, Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation (nearly 100%) in the pH range of 4–10 and was resistant to ionic interference. The Ff-Ti3C2Tx-Co3O4 membranes were prepared by vacuum filtration, permeated 220 mL of sulfamethoxazole (SMX) in the municipal wastewater influent matrix and maintained removal efficiency above 95%. Furthermore, PMS decomposition was linearly correlated with SMX degradation and each millimolar of PMS oxidized 0.425 mM of SMX. Meanwhile, electrons were rapidly transferred from Ff-Ti3C2Tx-Co3O4 to PMS to consume HCO5− and produce metastable active species (Ff-Ti3C2Tx-Co3O4-PMS*). The mechanism of rapid SMX degradation involved fast electron transfer in Ti2+/Ti3+⇋Ti4+ and Co2+⇋Co3+ redox cycles with PMS. Furthermore, 1O2 was generated via PMS→·O2−→1O2. This work provides new inspiration into the mechanisms of antibiotic degradation and electron transfer based on PMS activation.

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.