通过对UiO-66-67-NH的基调调节,NO转化为NO3-的高度选择性转化2 S-方案异质连接
Ping Tan1, Zhuo Wang1, Zhen Mao1
1Chongqing Key Laboratory of Catalysis and Environment materials, College of Environment and Resources, Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing 400067, China.
Journal of hazardous materials
|April 26, 2025
概括
一个新的UiO-66-67-NH2 S-方案异质连接使用半导体光催化剂有效地将氧化 (NO) 转化为酸盐 (NO3-). 这种材料实现了高的NO去除率,同时抑制了有毒的二氧化 (NO2) 的形成.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- 半导体光催化剂在去除低度的氧化 (NO) 方面表现有前途.
- 实现有效和选择性的NO转化为酸盐 (NO3-),同时最大限度地减少有毒的二氧化 (NO2) 释放是一个重大挑战.
- 开发先进的光催化剂对于环境修复和改善空气质量至关重要.
研究的目的:
- 为了合成和评估UiO-66-67-NH2 S方案异质连接用于光催化NO去除.
- 研究NO转化为NO3的机制以及反应性氧物种的作用.
- 为了优化光催化剂的高效率,选择性和抑制NO2副产品.
主要方法:
- 合成UiO-66-NH2和UiO-67-NH2组件,并将它们集成到S-scheme异质连接中.
- 在可见光照射下对NO去除和转化进行光催化性能测试.
- 实验性表征和密度函数理论 (DFT) 计算以阐明反应机制和电荷转移动态.
主要成果:
- 优化的UiO-66-67-NH2异构连接显著提高了光催化NO去除效率 (78%),超过了单个组件的性能.
- 异质连接选择性地将NO转化为NO3-与最小的NO2生成,归因于特定的吸附点和抑制反应性物种的形成.
- 在异质连接处内部的内部电场产生促进了有效的电荷分离,并加速了NO3形成的速度决定步骤.
结论:
- UiO-66-67-NH2 S-方案异质连接是一种高效的光催化剂,用于选择性NO转化为NO3.
- 了解特定活性物种 (·O2-) 和表面地点的作用是设计有效的环境修复光催化剂的关键.
- 这项工作为控制反应性氧物种和提高NO去除以获得更清洁的空气提供了有价值的见解.
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