Co3O4@NiO活化过硫酸盐降解新兴有机污染物的研究：各组分的作用和催化机理,New Journal of Chemistry

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Co3O4@NiO活化过硫酸盐降解新兴有机污染物的研究：各组分的作用和催化机理
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2022-05-16 , DOI: 10.1039/d2nj02044k
Yanqing Cong ₁ , Wanxing Wang ₁ , Xiang Chen ₁ , Yi Zhang ₁ , Shi-Wen Lv ₁

Affiliation

目前，实现废水中新兴有机污染物的高效去除是一项艰巨的任务。在目前的工作中，通过简便的水热法然后煅烧合成了一种具有良好磁性的新型Co ₃ O _{4 @NiO-2 复合材料。}_{有趣的是，NiO的引入可以提高Co 3} O ₄的比表面积，而Co ₃ O ₄的存在降低了NiO的电荷转移电阻。磁性的存在为催化剂的分离和回收创造了更大的灵活性。更重要的是，所制备的 Co ₃ O ₄@NiO-2在PS活化中表现出优异的催化性能，所开发的Co ₃ O ₄ @NiO-2/PS氧化体系可以实现对TC、BPA和苯酚等多种有机污染物的有效降解。在 TC 降解过程中，自由基和非自由基途径参与 PS 的活化，其中图片 ID：d2nj02044k-t1.gif

˙OH、

和¹ O ₂是主要的活性物质。此外，还注意到 Co ³⁺ /Co ²⁺和 Ni ³⁺ /N ²⁺氧化还原电对在 PS 活化产生自由基中起关键作用，而 PS、Co ₃ O之间的直接电子转移过程₄ @NiO-2，TCs 参与了 TC 降解。总之，在目前的研究中，不仅合成了一种用于 PS 活化的高性能催化剂，而且还分享了一些新的见解，以供进一步研究活化机制。

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Insights into the degradation of emerging organic pollutants by peroxydisulfate activated with Co3O4@NiO: role of each component and catalytic mechanism

Nowadays, it is a challenging task to achieve the high-efficiency removal of emerging organic pollutants from wastewater. In the current work, a novel Co₃O₄@NiO-2 composite with great magnetic properties was synthesized by a facile hydrothermal method followed by calcination. Interestingly, the introduction of NiO could improve the specific surface area of Co₃O₄, while the presence of Co₃O₄ decreased the charge transfer resistance of NiO. The existence of magnetic properties created more flexibility for the separation and recovery of the catalyst. More importantly, the as-prepared Co₃O₄@NiO-2 exhibited excellent catalytic performance in PS activation, and the developed Co₃O₄@NiO-2/PS oxidation system could achieve the effective degradation of various organic contaminants, including TC, BPA, and phenol. During the TC degradation process, radical and nonradical pathways were involved in the PS activation, in which Image ID:d2nj02044k-t1.gif

, ˙OH,

, and ¹O₂ were the major active species. Furthermore, it was also noted that the Co³⁺/Co²⁺ and Ni³⁺/N²⁺ redox couples played a crucial role in PS activation for generating radicals, while the direct electron-transfer process among PS, Co₃O₄@NiO-2, and TCs was involved in TC degradation. In short, in the current study, not only a high-performance catalyst was synthesized for the PS activation, but also some novel insights for further research on the activation mechanism are shared.

更新日期：2022-05-16

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