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Lattice B-doping evolved ferromagnetic perovskite-like catalyst for enhancing persulfate-based degradation of norfloxacin
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2021-11-29 , DOI: 10.1016/j.jhazmat.2021.127949
Bihui Niu 1 , Luhan Wang 1 , Mingzhe Li 1 , Wenli Yao 1 , Kun Zang 2 , Lei Zhou 2 , Xiaowen Hu 3 , Yian Zheng 1
Affiliation  

Series of B-doped perovskite-like materials CeCu0.5Co0.5O3 (B-C3O) were fabricated with unique ferromagnetic property due to partial substitution of non-magnetic 2p-impurities boron in the lattice. Then, B-C3O was used for activating peroxymonosulfate (PMS) for the degradation of norfloxacin (NOR), one kind of emerging pollutants with the concentration level up to mg/L in wastewaters. The results indicated that 5.0% B-C3O exhibited stable catalytic ability at pH 3.0–9.0 and high degradation efficiency in co-existing inorganic Cl, SO42−, NO3, H2PO4 and organic humic acid. Non-radical 1O2, radicals •OH and SO4•−, as well as ClO were detected with synergy effect for NOR degradation. By quantifying free radicals, •OH with 0.52 µM and SO4•− with 10.91 µM were obtained at 180 min, verifying the leading role of SO4•−. The degradation process involved the defluorination and decarboxylation, as well as opening of quinolone and piperazinyl rings. Adopting alfalfa as the model plant, the toxicity effect before and after NOR degradation was finally evaluated with seed germination rate and chlorophyll content as the physiological indicators. In summary, non-metal B-doping not only provides a creative strategy for the development of ferromagnetic perovskite-like materials, but also affords excellent catalysts for aiding the advanced oxidation technology for removal of emerging pollutants in wastewaters.



中文翻译:

晶格 B 掺杂演化出的类铁磁类钙钛矿催化剂用于增强诺氟沙星的过硫酸盐降解

由于晶格中非磁性2p杂质硼的部分取代,制备了一系列B掺杂钙钛矿类材料CeCu 0.5 Co 0.5 O 3 (BC 3 O),具有独特的铁磁性能。然后,BC 3 O 被用于活化过氧单硫酸盐(PMS)以降解诺氟沙星(NOR),这是一种在废水中浓度水平高达 mg/L 的新兴污染物。结果表明,5.0% BC 3 O在pH 3.0-9.0下表现出稳定的催化能力,对共存的无机Cl -、SO 4 2-、NO 3 -、H 2 PO具有较高的降解效率。4 -和有机腐植酸。非自由基1 O 2、自由基•OH 和SO 4 •-以及ClO -被检测到对NOR 降解具有协同作用。通过对自由基进行定量,180分钟时得到0.52 µM的•OH和10.91 µM的SO 4 • -,验证了SO 4 •-的主导作用. 降解过程涉及脱氟和脱羧,以及喹诺酮和哌嗪环的开环。以紫花苜蓿为模式植物,以种子发芽率和叶绿素含量为生理指标,最终评价了NOR降解前后的毒性作用。综上所述,非金属 B 掺杂不仅为开发类铁磁性钙钛矿材料提供了创新策略,而且为辅助高级氧化技术去除废水中新兴污染物提供了优异的催化剂。

更新日期:2021-12-07
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