三元运算
二甲胺
化学
催化作用
电子受体
电子供体
接受者
耐火材料(行星科学)
动力学
无机化学
化学工程
光化学
材料科学
有机化学
冶金
物理
量子力学
计算机科学
工程类
程序设计语言
凝聚态物理
作者
Qing Dai,Guangfei Yu,Juanjuan Qi,Yanan Wang,Lei Xing,Yihao Wang,Zhijie Zhang,Xiaolin Zhang,Zhimo Fang,Penghui Du,Lai Lyu,Lidong Wang
标识
DOI:10.1016/j.apcatb.2023.123184
摘要
Herein, we fabricated CoCu-0.25-Ov with ternary Co…Ov…Cu sites through simple co-precipitation to achieve effective co-utilization of organics and dissolved oxygen (DO) as endogenous electron donor-acceptor in Fenton-like system. Around 100% of dimethylamine (DMA) min within 30 is removed. The involved kinetics (0.22 min−1) and oxidant utilization efficiency (22.5%) are higher than controls with binary sites. Multi-scaled characterizations and theoretical calculations reveal that electron-polarized Co…Ov…Cu sites facilitate co-activation of DMA and DO as electron donor-acceptor through increasing d-band center and lowering work function of catalyst. Meanwhile, ternary sites favor 1O2 and SO4•− generation, and shorten the migration distance of active species to pollutant, thus achieving excellent dual performance improvements. Semi-quantitative results of ESR indicate that DO activation and peroxymonosulfate (PMS) oxidation contribute about three-fourths and one-fourth to 1O2 production, respectively. This contribution provides a new and sustainable strategy for high-efficiency and oxidant-saving removal of refractory pollutants in the environment.
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