提高乙醇在表面化学修饰活性碳纤维上的吸附性能
Mengyan Wang1, Yuxuan Wang1, Junhao Wang1
1College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China.
Journal of environmental sciences (China)
|September 26, 2025
概括
活性碳纤维 (ACF) 的表面极性修改显著增强了乙醇吸附. 异构原子兴奋剂产生了氧化ACF (O-ACF) 和化ACF (N-ACF),提高了乙醇捕获能力.
科学领域:
- 材料科学 材料科学 材料科学
- 吸附科学 吸附科学
- 环境工程 环境工程
背景情况:
- 活性碳纤维 (ACF) 由于其非极地表面而限制了乙醇吸附.
- 乙醇排放是一个问题,特别是来自谷物干燥行业.
- 开发有效的乙醇吸附剂至关重要.
研究的目的:
- 为了提高ACF的乙醇吸附能力.
- 通过 heteroatom doping 调查表面极性修改的影响.
- 为了比较氧气修饰ACF (O-ACF) 和修饰ACF (N-ACF) 的吸附性能.
主要方法:
- 使用异原子兴奋剂 (氧和) 来改变ACF的表面极性.
- 对功能组,特定表面积和微孔结构进行修改ACF的表征.
- 在修改和未修改的ACF上测量乙醇和水吸附能力.
主要成果:
- 与未经修改的ACF相比,O-ACF和N-ACF具有显著更高的乙醇吸附能力 (分别为11.3倍和4.7倍).
- 修改后的ACF显示极性功能组增加,表面积增加,微孔结构发达.
- 水表现出竞争性吸附,对修改ACF的乙醇吸附产生负面影响.
- 乙醇吸附遵循线性驱动力 (LDF) 模型,而水吸附遵循粒子内部扩散 (IPD) 模型.
结论:
- 异构原子兴奋剂有效地提高了ACF的乙醇吸附能力.
- 表面功能组和孔隙结构是改善吸附的关键因素.
- 水的共同吸附是一个挑战,乙醇和水具有不同的吸附机制.
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