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[1]武沙沙,覃远航,陈 真,等.Cr3+掺杂UiO-66金属有机框架吸附分离CO2混合体系 [J].武汉工程大学学报,2026,48(04):397-405.[doi:10.19843/j.cnki.CN42-1779/TQ.202605005]
　WU Shasha,QIN Yuanhang,CHEN Zhen,et al.Cr3+-doped UiO-66 metal-organic framework for adsorptive separation of CO2-mixed systems [J].Journal of Wuhan Institute of Technology,2026,48(04):397-405.[doi:10.19843/j.cnki.CN42-1779/TQ.202605005]
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Cr3+掺杂UiO-66金属有机框架吸附分离CO2混合体系
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
48
期数:
2026年04期
页码:
397-405
栏目:
现代大化工
出版日期:
2026-08-30

文章信息/Info

Title:
Cr3+-doped UiO-66 metal-organic framework for adsorptive separation of CO2-mixed systems
文章编号:
1674 - 2869（2026）04 - 0397 - 09
作者:
武沙沙; 覃远航; 陈 真; 杨 犁*
武汉工程大学化工与制药学院，湖北 武汉 430205
Author(s):
WU Shasha; QIN Yuanhang; CHEN Zhen; YANG Li*
School of Chemical Engineering and Pharmacy，Wuhan Institute of Technology，Wuhan 430205，China
关键词:
金属有机框架（MOF）; CO2捕集; 气体分离; 金属离子改性
Keywords:
metal-organic framework（MOF）;  CO2 capture;  gas separation;  metal ion modification
分类号:
X701
DOI:
10.19843/j.cnki.CN42-1779/TQ.202605005
文献标志码:
A
摘要:
UiO-66具有优异的稳定性与结构可调性，因此通过调控孔径可有效提升其吸附容量。本文采用一锅水热法合成了Cr-UiO-66材料，系统研究了Cr的掺杂量（摩尔分数为0.01和0.05）对气体吸附性能的影响。测定了CO2、CH4和N2纯组分在273、298、308 K下0~2 MPa压力范围内的吸附等温线，并对0.01Cr-UiO-66进行了10个吸附循环的测试。结果表明Cr的引入为气体吸附提供了更多的吸附位点，在298 K和0.1 MPa下，Cr(NO3)3改性的复合材料的CO2吸附量可达2.27 mmol/g，与UiO-66（1.73 mmol/g）相比提高了31.2%。此外，采用多种吸附模型对实验数据进行了拟合。结果表明：在低压条件下，压力对吸附的影响较小；而在高压条件下，Langmuir-Freundlich模型的拟合度最佳，Langmuir模型和双位点Langmuir模型的拟合偏差则随压力升高而逐渐增大。基于理想吸附溶液理论计算了CO2/CH4与CO2/N2混合体系的吸附选择性，Cr-UiO-66对CO2/CH4与CO2/N2的选择性最高分别可达10.8和52.4。因此，Cr掺杂可以有效提高UiO-66对CO2的吸附分离性能。
Abstract:
UiO-66 exhibits excellent stability and structural tunability，enabling effective enhancement of its adsorption capacity through pore size regulation. In this study，Cr-UiO-66 materials were synthesized via the one-pot hydrothermal method，and the effects of Cr doping （molar fractions of 0.01 and 0.05） on their adsorption performance were systematically investigated. Adsorption isotherms of pure CO2，CH4，and N2 were measured at 273 K，298 K，and 308 K under pressures varying from 0 to 2 MPa，and 10 adsorption cycles were tested on the 0.01Cr-UiO-66 sample. Results indicated that the introduction of Cr provided additional adsorption sites，with the CO2 adsorption capacity of the Cr(NO3)3-modified composite reaching 2.27 mmol/g at 298 K and 0.1 MPa，which was 31.2% higher than that of UiO-66 （1.73 mmol/g）. Furthermore，various adsorption models were used to fit the experimental data，revealing that pressure had a minor effect on adsorption under low-pressure conditions，while the Langmuir-Freundlich model showed the best goodness of fit at high pressures. In contrast，the fitting deviations of the Langmuir model and dual-site Langmuir model gradually increased with increasing pressure. Based on the ideal adsorbed solution theory，the adsorption selectivity of CO2/CH4 and CO2/N2 mixed systems was calculated，and Cr-UiO-66 exhibited maximum selectivity of 10.8 and 52.4 for CO2/CH4 and CO2/N2, respectively. Therefore，Cr doping significantly enhances the CO2 adsorption and separation performance of UiO-66.

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备注/Memo

备注/Memo:
收稿日期：2026-05-12
基金项目：国家自然科学基金（52370118，52000084）
作者简介：武沙沙，硕士研究生。Email：3514237408@qq.com
*通信作者：杨 犁，博士，教授。Email：liyang@wit.edu.cn
更新日期/Last Update: 2026-09-05