钴原子簇和单原子的协同效应促进了 A 型和 R 型二氧化钛上的芬顿反应

IF 9.7 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Cleaner Production Pub Date : 2024-11-09 DOI:10.1016/j.jclepro.2024.144194

Hongda Zhang , Yunzhe Zhao , Haiyan Li , Jian Wang , Yong Yu

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引用次数: 0

摘要

单原子（SA）位点的调节对于促进高级氧化过程（AOPs）至关重要。本文制备了具有 Co 混合位点（团簇和单原子，CS）的 A 型和 R 型二氧化钛，通过活化过一硫酸盐（PMS）来降解磺胺甲噁唑（SMX）。Co CS/A-TiO2+PMS体系在二次流出和黑暗条件下可在14分钟内完全去除SMX，其速率常数（0.4926 min-1）分别是Co SA/R-TiO2、Co SA/A-TiO2和Co CS/R-TiO2体系的4.4、3.2和2.5倍。实验和计算证实，Co 团簇优化了 Co SA 的电子构型，促进了 Co SA 对 PMS 的吸附、转化和解吸，从而提高了 Fenton 样活性。Co CS/A-TiO2 催化海绵在微反应器处理实验中表现出优异的降解性能。这项研究揭示了 SA 与簇在原子水平上的协同效应，并为废水处理中非磁性催化剂的回收提供了一种多功能策略（催化海绵）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The synergistic effect of Co atomic clusters and single atoms facilitates the Fenton-like reaction on A- and R-TiO2

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The synergistic effect of Co atomic clusters and single atoms facilitates the Fenton-like reaction on A- and R-TiO2

The regulation of single atom (SA) sites is crucial for the promotion of advanced oxidation processes (AOPs). Here A- and R-TiO₂ with Co mixed sites (clusters and single atoms, CS) were prepared to degrade sulfamethoxazole (SMX) by activating peroxymonosulfate (PMS). Co CS/A-TiO₂+PMS system can completely remove SMX within 14 min under secondary effluent and dark conditions, and its rate constant (0.4926 min⁻¹) was 4.4, 3.2 and 2.5 times higher than that of Co SA/R-TiO₂, Co SA/A-TiO₂ and Co CS/R-TiO₂ systems, respectively. Experiments and calculations verified that the electron configuration of Co SA was optimized by Co clusters, facilitating the adsorption, conversion and desorption of PMS by Co SA, leading to the enhancement of Fenton-like activity. Co CS/A-TiO₂ catalytic sponges exhibited exceptional degradation performance in microreactor treatment experiment. This work reveals the synergistic effect between SA and clusters at atomic level and provides an all-purpose strategy (catalytic sponge) for the recovery of non-magnetic catalysts in wastewater treatment.

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来源期刊

Journal of Cleaner Production 环境科学-工程：环境

CiteScore

20.40

自引率

9.00%

发文量

4720

审稿时长

111 days

期刊介绍： The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.