(Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4高熵氧化尖晶石在大pH范围光fenton降解盐酸土霉素的合成

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Yuxin Gan, Dan Liu, Zhipu Wang, Ge Huang, Rumei Ze, Xiaohong Wang, Jiabin Zhou
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引用次数: 0

摘要

铁基尖晶石氧化物具有良好的催化活性和稳定性,在光fenton降解有机污染物方面具有广阔的应用前景。本研究采用溶液燃烧法制备(Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4。多种表征技术证实(Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4具有良好的稳定性和形貌。它具有高熵氧化性质,适合作为光- fenton催化剂高效降解盐酸土霉素(OTC-HCl)。在10 mM H2O2、0.06 g/L OTC-HCl、pH 4.0的可见光(Vis)条件下,催化剂的降解效率为92.9%。在光- fenton系统中,H2O2的利用率(以OTC-HCl降解量与H2O2消耗量之比计算)为34.5,是纯H2O2(4.2)的8.3倍。该催化剂表现出良好的酸碱适应性,在3 ~ 11的pH范围内,OTC-HCl的去除率超过92.0%,在pH 11下的反应速率常数为0.08 min−1。自由基捕获实验表明(Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4催化H2O2生成·OH、·O2−和e−,这是参与OTC-HCl降解的主要自由基。综上所述,(Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4不仅解决了传统光- fenton系统中H2O2利用率低的问题,而且还能在光照条件下催化H2O2的生成。因此,它可以作为一种优良的光- fenton催化剂用于OTC-HCl的降解。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of (Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4 High Entropy Spinel Oxide for Photo-Fenton Degradation of Oxytetracycline Hydrochloride Over a Wide pH Range

Iron-based spinel oxides, with excellent catalytic activity and stability, hold promising potential in the photo-Fenton degradation of organic pollutants. In this study, (Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4 was prepared via the solution combustion method. Multiple characterization techniques confirmed the good stability and morphology of (Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4. It exhibited high-entropy oxide properties, making it suitable as a photo-Fenton catalyst for the efficient degradation of oxytetracycline hydrochloride (OTC-HCl). Under visible light (Vis) with 10 mM H2O2, 0.06 g/L OTC-HCl, and pH 4.0, the catalyst achieved a degradation efficiency of 92.9%. In the photo-Fenton system, the utilization rate of H2O2 (calculated as the ratio of the degradation amount of OTC-HCl to the consumption amount of H2O2) was 34.5, which is 8.3 times higher than that of pure H2O2 (4.2). The catalyst showed good acid–base adaptability, achieving OTC-HCl removal rates exceeding 92.0% across a pH range of 3–11, with a reaction rate constant of 0.08 min−1 at pH 11. Free-radical capture experiments showed that (Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4 catalyzed H2O2 to generate ·OH, ·O2, and e, which are the main free radicals involved in the degradation of OTC-HCl. In summary, (Fe0.2Co0.2Ni0.2Cu0.2Mn0.2)Fe2O4 not only addresses the issue of low H2O2 utilization in traditional photo-Fenton systems but also catalyzes the generation of H2O2 under light conditions. Thus, it can serve as an excellent photo-Fenton catalyst for OTC-HCl degradation.

Graphical Abstract

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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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