| 氧化亚铜驱动中低温热协同活化过一硫酸盐非自由基降解机制及反应路径 |
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| 引用本文：杨国栋,李仲原,江丹,宋鑫茹,赵聆宇,陈胜文.氧化亚铜驱动中低温热协同活化过一硫酸盐非自由基降解机制及反应路径[J].上海第二工业大学(中文版),2026,43(2):129-137 |
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| 中文摘要:采用液相还原法合成了立方体(c-Cu2O)、截顶八面体(v-Cu2O) 和八面体(o-Cu2O) 3 种形貌的氧化亚铜(Cu2O)。在c-Cu2O 20 mg、过一硫酸盐(PMS) 60 mg、50 ℃ 条件下, 10 min 内四环素(TC) 降解率达95.2%, 远高于单独热活化PMS 在30 min 内的TC 降解率(87.5%)。该体系在pH3.0~11.0 范围内均保持优异的降解性能, 并对Cl-、HCO3- 、H2PO4- 、NO3- 及腐殖酸展现出优异抗干扰能力。机理研究表明, c-Cu2O 的引入使反应路径由自由基(?SO4- 、?OH) 主导转变为以1O2 为主的非自由基路径, 热协同显著加速了Cu+/Cu2+ 循环与1O2 生成。c-Cu2O/热协同-PMS 体系循环5 次后, TC 降解率仍保持在89.0%。本研究为中低温条件下构建高效、稳定、抗干扰的非均相PMS 体系提供了新策略。 |
| 中文关键词:氧化亚铜 中低温热活化 过一硫酸盐 非自由基 四环素 |
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| Efficient Degradation of Tetracycline via Low- to Medium-Temperature Thermal Activation Coupled with Copper(I)-Activated Peroxymonosulfate |
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| Abstract:Three types of cuprous oxide (Cu2O) with cubic (c-Cu2O), truncated octahedral (v-Cu2O) and octahedral (o-Cu2O) morphologies were synthesized via a liquid-phase reduction method. Under the conditions of 20 mg c-Cu2O, 60 mg peroxymonosulfate (PMS) and 50 ℃, the degradation efficiency of tetracycline (TC) reached 95.2% within 10 min, which was much higher than degradation efficiency of TC achieved by sole thermal activation of PMS within 30 min (87.5%). The system maintained excellent degradation performance at pH ranging from 3.0 to 11.0, and exhibited strong anti-interference ability against Cl-??, HCO3-??, H2PO4-, NO3-??and humic acid. Mechanistic studies revealed that the introduction of c-Cu2O switched the dominant reaction pathway from radical oxidation (?SO4, ?OH) to non-radical oxidation dominated by singlet oxygen (1O2). Thermal synergy significantly accelerated the Cu+/Cu2+??redox cycle and the generation of 1O2. After five cycles of c-Cu2O/activated synergistic-PMS system, the degradation efficiency of TC still retained 89.0%. This study provides a novel strategy for constructing high-efficiency, stable and anti-interference heterogeneous PMS systems under low-to-medium temperatures. |
| keywords:cuprous oxide low-to-medium temperature thermal activation peroxymonosulfate non-radical tetracycline |
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