用α-MnO2/Mn2O3/Mn3O4混合系统进行氧硫酸盐激活:对有机染料进行参数优化和氧化降解
Seema Singh1,2, Ritesh Patidar3, Vimal Chandra Srivastava4
1School of Applied & Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, 248007, India.
概括
环保的氧化物 (MnOx) 有效地降解罗达胺B (RhB) 染料. 这项研究证明了它们在酸性条件下的催化活性,实现了完整的染料降解和显著的有机碳减少.
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:
- 氧化物 (MnOx) 呈现出不同的氧化状态和结构,影响它们的催化性能.
- 开发低毒性,环保的催化剂对于环境修复至关重要.
- 罗达胺B (RhB) 是一种常见的有机污染物,需要有效的降解方法.
研究的目的:
- 使用化学沉合成具有低毒性的球形氧化物 (α-MnO2,Mn2O3,Mn3O4).
- 通过过氧硫酸盐 (PMS) 激活来研究这些MnOx材料对Rhodamine B (RhB) 降解的催化活性.
- 优化降解条件并阐明降解机制.
主要方法:
- 化学沉用于MnOx合成.
- 用X射线衍射 (XRD),扫描电子显微镜 (SEM) 和布鲁纳乌尔-埃梅特-泰勒 (BET) 分析进行材料表征.
- 使用RhB和PMS进行催化降解实验,控制pH值,催化剂剂量,PMS负载和染料度.
- 清理者实验和质量分析以阐明机制.
主要成果:
- 合成的MnOx材料表现出球形形态,高表面积和出色的多孔性.
- 在酸性条件下 (pH=3) 在60分钟内实现了完整的RhB降解和90%的总有机碳 (TOC) 减少.
- 该研究确定了关键的操作参数,并阐明了涉及激素物种 (SO4•−/•OH) 的降解机制.
结论:
- 合成的氧化是RhB降解的有效,低毒性催化剂.
- 酸性条件和高表面积对于有效的催化活性至关重要.
- 氧化催化剂的可重复使用性很好,并且在废水处理应用中具有很大的潜力.
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