单个Mn原子对TiO2进行调节的分子氧激活,用于光催化形式甲氧化
Xiufan Liu1, Cancan Ling2, Xingdong Chen1
1Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, PR China.
Journal of colloid and interface science
|April 6, 2024
概括
在TiO2纳米片上单个Mn原子有效地通过光催化氧化甲 (HCHO). 这种先进的催化剂产生反应性氧物种,在环境条件下有效地去除HCHO.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 环境化学环境化学
背景情况:
- 单原子催化剂 (SAC) 对于激活氧分子至关重要.
- 甲 (HCHO) 是一个常见的室内空气污染物,需要有效的去除方法.
- 二氧化 (TiO2) 是一个广泛研究的光催化剂,但它的效率可以提高.
研究的目的:
- 为了研究分散单个 (Mn) 原子在TiO2纳米片上用于甲的光催化氧化的有效性.
- 阐明单个Mn原子在增强氧激活和甲降解中的作用.
- 探索潜在的反应机制和涉及的活性氧物种.
主要方法:
- 密度函数理论 (DFT) 计算以建模电子属性和反应路径.
- 单原子 Mn/TiO2 催化剂的实验合成和表征.
- 气相光催化氧化实验,以评估甲去除效率.
主要成果:
- 在TiO2上单个Mn原子显著改善了电子转移和氧激活.
- Mn/TiO2光催化剂实现了100%的7.6ppm甲的去除.
- 观察到甲的矿化效率超过99.6%.
- 单原子氧离子 (O-) 被确定为关键的活性氧物种.
结论:
- 在TiO2纳米板上分散单个Mn原子可增强甲氧化过程中的光催化活性.
- 性能提升归因于电子转移和O2激活的改善,产生高度反应的O-物种.
- 这项研究表明,使用基于TiO2的单原子催化剂来切实去除甲是一种有希望的方法.
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