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缺陷工程UiO-66用异质金属进行增强SO2通过增加活性站点吸附

Huifang Xu¹, Yuhong Tian^1,2, Ziqiang Zhu¹

¹School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

Inorganic chemistry

|October 21, 2025

概括

缺陷工程金属有机框架 (MOFs) 与兴奋剂显著增强SO2吸附. 这一战略改善了工业烟气净化活动现场的可访问性和稳定性.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

UiO-66金属有机框架 (MOFs) 对气体吸附有前景,但由于其微孔结构,活动部位的可访问性受到限制.
提高MOF的化学稳定性和活动地点的可访问性对于工业烟气净化等实际应用至关重要.

研究的目的:

通过使用后合成异构金属兴奋剂策略,设计富有缺陷的UiO-66框架.
为了提高UiO-66的SO2吸附能力和化学稳定性,用于工业应用.

主要方法:

酸被用作调节器在UiO-66.6中产生缺陷.
使用Mn2+进行后合成异质注,以产生Mn-UiO-66-3.3.
对材料的结构强度,热稳定性和SO2吸附性能进行了系统的优化和表征.

主要成果:

-化Mn-UiO-66-3在酸性和基本性介质中表现出优异的结构稳定性以及高达400°C的热稳定性.
与原始UIO-66 (0.628 mmol·g-1) 相比,SO2吸附能力提高了77% (1.111 mmol·g-1).
缺陷部位和Mn2+易斯酸中心之间的合作相互作用被确定为增加活性部位密度和吸附性能的关键.

结论:

异质金属兴奋剂是一种有效的缺陷工程策略,用于增强MOF主机-客户互动.
工程缺陷点和易斯酸中心协同增强SO2吸附能力.
这项工作为SO2捕获机制提供了宝贵的见解,并推进了用于烟气净化的MOF设计.

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