通过协调缺陷的UiO-66从水中增强凯托的吸附
Zhilun Liu1, Lei Zhao2, Xu He1
1State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China.
Environmental research
|December 25, 2025
概括
在UiO-66中使用乙酸 (HOAc) 引入缺陷显著增加了烯 (KTP) 的吸附. 这一策略提高了材料的性能,导致KTP吸收能力显著增加,以改善污染物去除.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术纳米技术
背景情况:
- UiO-66是一种金属有机框架 (MOF),在吸附中具有潜在的应用.
- 缺陷工程是提高MOF性能的一种有希望的策略.
- 烯 (KTP) 是一种常见的制药污染物.
研究的目的:
- 调查缺失链接器缺陷对UIO-66.6的影响.
- 探索这些缺陷在增强烯 (KTP) 吸附中的作用.
- 了解有缺陷的UiO-66.6的吸附机制和性能.
主要方法:
- 通过协调竞争战略,利用乙酸 (HOAc) 合成有缺陷的UiO-66.
- 使用FTIR和XPS等技术对有缺陷的UiO-66进行表征.
- 调查吸附动力学和异热量,将数据与伪二阶和朗迈尔模型相匹配.
- 执行DFT计算以阐明吸附机制.
主要成果:
- 缺陷工程使UiO-66的表面积增加了27% (875到1440 m2/g).
- 对KTP的吸附能力与缺陷部位 (645至1136毫克/克) 线性增加.
- 吸附跟随伪二阶动力学和兰格穆尔等热量,表明化学吸收.
- 缺陷的UiO-66在广泛的pH范围内显示出高选择性和弹性.
结论:
- 在UIO-66中缺少链接器缺陷显著提高了KTP吸附能力.
- 增强的吸附性归因于增加的表面积,毛孔体积和特定的缺陷部位.
- 易斯酸金属中心的化学吸附,以及范德瓦尔斯力和键,驱动KTP吸附.
- 缺陷的UiO-66为药品污染物去除提供了一个有前途的吸附剂.
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