MgCoFe-LDO 催化剂通过活化过硫酸盐产生的活性氧高效降解磺胺甲噁唑

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-09-11 DOI:10.1007/s10562-024-04827-3
Kefeng Shang, Xi Feng, Yongxin Wang
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引用次数: 0

摘要

制备了钴铁镁层状双氧化物(MgCoFe-LDO)来活化过硫酸铵(PMS)以降解磺胺甲噁唑(SMX),SMX的高效降解揭示了Mg2Co1Fe1-LDO在不同pH值和水基条件下对PMS具有优异的催化活性。扫描电子显微镜分析表明催化剂具有典型的 "花状 "结构,X 射线粉末衍射分析证明 Mg2Co1Fe1-LDO 的主要晶相为 CoFe2O4 和 Mg1-xFexO,这也是 Mg2Co1Fe1-LDO 具有良好催化活性的原因。自由基清除实验证实,1O2、({text{SO}}_{4}^{cdot - }\)、OH和({text{O}}_{2}^{cdot - }\)参与了SMX的降解,但1O2和({text{SO}}_{4}^{cdot - }\)起主导作用。根据对 Mg2Co1Fe1-LDO 催化剂的 X 射线光电子能谱(XPS)分析,CoOH+、CoO+、Fe3+、FeOH2+、Fe2+ 等物种参与了 PMS 的活化过程。此外,根据LC-MS分析检测到的N-羟基磺胺甲噁唑、3-氨基-5-甲基异噁唑等中间产物,提出了SMX可能的降解途径,并通过毒性估算软件工具软件进行毒性分析,结果表明SMX的大部分降解产物毒性低于SMX。
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Efficient Degradation of Sulfamethoxazole via Reactive Oxygen Species Produced from Activated Peroxymonosulfate by MgCoFe-LDO Catalyst

MgCoFe layered double oxides (MgCoFe-LDO) were fabricated to activate peroxymonosulfate (PMS) for degradation of sulfamethoxazole (SMX), and the highly efficient degradation of SMX revealed an excellent catalytic activity of Mg2Co1Fe1-LDO for PMS under different pH values and water matrix. Scanning electron microscope analysis indicated the catalyst has a typical “flower-like” structure, and the X-ray powder diffraction analyses proved that the main crystal phase of Mg2Co1Fe1-LDO is CoFe2O4 and Mg1−xFexO, which is responsible for the good catalytic activity of Mg2Co1Fe1-LDO. The radical scavenging experiments confirmed that 1O2, \({\text{SO}}_{4}^{\cdot - }\), OH and \({\text{O}}_{2}^{\cdot - }\) were involved in the degradation of SMX, but 1O2 and \({\text{SO}}_{4}^{\cdot - }\) played the dominant roles. According to the X-ray photoelectron spectroscopy (XPS) of Mg2Co1Fe1-LDO catalyst, it was referred that the species including CoOH+, CoO+, Fe3+, FeOH2+, Fe2+, etc. involve in the activation process of PMS. Moreover, the possible degradation pathways of SMX were proposed according to the detected intermediates including N-hydroxy sulfamethoxazole, 3-amino-5-methylisoxazole from LC–MS analysis, and the toxicity analysis via Toxicity Estimation Software Tool software shows that most of the degradation products of SMX have lower toxicity than SMX.

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来源期刊
Catalysis Letters
Catalysis Letters 化学-物理化学
CiteScore
5.70
自引率
3.60%
发文量
327
审稿时长
1 months
期刊介绍: Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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