通过以乙烯糖醇介导的双金属硫化物增强的硫酸激活,以降解伊米达克洛普里德
Mengyun Jiang1, Zhongjun Xu1, Xirong Zhang1
1Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Chemosphere
|September 2, 2023
概括
乙烯基醇 (EG) 介导的铜铁硫化物 (CuFeS2) 微花有效地激活硫酸盐 (PS) 用于废水中消毒 imidacloprid (IMI) 农药. 这项研究澄清了溶剂对催化剂合成和性能的影响,突出了EG的作用.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 铜铁硫化物 (CuFeS2) 是一个有机污染物去除的异质催化剂.
- 合成溶剂对CuFeS2特性和催化效率的影响尚不清楚.
- 有效的废水处理需要先进的氧化工艺来处理像伊米达克洛普里德 (IMI) 这样的持久有机污染物.
研究的目的:
- 研究各种溶剂 (水,乙醇,乙烯基醇 (EG),甘油,聚乙烯基醇 200) 在合成CuFeS2微花中的作用.
- 评估合成的CuFeS2催化剂在激活硫酸盐 (PS) 进行IMI农药降解方面的性能.
- 阐明反应机制并确定参与催化过程的关键反应物种.
主要方法:
- 使用不同的溶剂合成CuFeS2微花.
- 合成材料的特征 (形态,结晶性,表面积,不配对的电子).
- 使用CuFeS2/PS系统进行IMI去除的催化降解实验,包括反应性物种识别和DFT计算.
主要成果:
- 溶剂的选择显著影响CuFeS2微花形态,结晶性,产量,表面积和电子特性.
- 以乙烯糖醇 (EG) 介导的CuFeS2在异质PS激活方面表现出优越的催化活性.
- 确定了硫酸盐基 (SO4•−) 和基 (•OH),其中•OH占主导地位 (90.4%);Fe(IV) 和S2−也对IMI降解和催化剂再生作出了贡献.
结论:
- EG是合成高效的CuFeS2催化剂的最佳溶剂,用于PS激活.
- CuFeS2/PS系统有效降解IMI,以OH作为主要反应物种,由Fe (IV) 支持,以及Fe和Cu离子的氧化还原循环.
- 这项研究为设计用于废水处理的先进双金属硫化物催化剂提供了洞察力,并促进了它们的工业应用.
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