红色泥复合物作为一个多孔催化剂,用于激活过氧化硫酸盐,降解甲蓝色
Hongliang Chen1, Nana Lu1, Qian Long2
1College of Chemistry and Chemical Engineering, Anshun University, Anshun, Guizhou 561000, People's Republic of China; Key Laboratory of High-Value Circular Utilization of Rosa Sterilis Residue of Anshun City, Anshun University, Anshun, Guizhou 561000, People's Republic of China.
一种新型的红泥复合催化剂 (0.1Co/RM@G) 通过使用过氧硫酸盐 (PMS) 有效降解甲蓝 (MB). 单片氧被确定为关键的反应物种,展示了催化剂在废水处理方面的潜力.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 污水处理仍然是一个重大的环境挑战,需要有效的污染物降解方法.
- 甲蓝 (MB) 是一种常见的模型污染物,用于评估先进的氧化过程.
- 红泥 (RM),一个工业废物,为开发低成本的催化材料提供了机会.
研究的目的:
- 合成和表征一种新型多孔复合催化剂 (0.1Co/RM@G) 用于激活多氧硫酸盐 (PMS).
- 为了研究0.1Co/RM@G催化剂在水溶液中降解甲基蓝 (MB) 的效率.
- 阐明降解机制,并确定涉及的主要反应性氧物种 (ROS).
主要方法:
- 使用红泥 (RM) 和活性物种 (CoFe2O4,Fe3O4,Na4CoO3) 制造一个多孔复合催化剂 (0.1Co/RM@G).
- 氧硫酸盐 (PMS) 激活用于甲蓝 (MB) 降解实验.
- 激素扫除测试和电子磁共振 (EPR) 测试以确定ROS.
- 密度函数理论 (DFT) 和LC-MS用于机械和路径分析.
主要成果:
- 在最佳条件下,0.1Co/RM@G催化剂在15分钟内实现了99.7%的MB去除 (1g/L催化剂,10mM PMS).
- 单一氧气 (1O2) 被证实是主导的ROS,负责MB降解.
- 催化剂表现出良好的可重复使用性,在四个循环后保持了超过71.3%的效率.
- DFT计算表明MB上有特定的易受1O2攻击的易受攻击地点.
结论:
- 0.1Co/RM@G复合催化剂通过PMS激活表现出高效率和可重复使用的MB降解.
- 单片氧在降解过程中发挥着关键作用,由协同的Co/Fe氧化还原循环驱动.
- 催化剂在处理MB污染的废水方面显示出实践应用的巨大潜力.
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