[1]欧红香,李 桥,叶 青,等.金属有机骨架材料UiO-66制备及吸附亚甲基蓝性能研究[J].常州大学学报(自然科学版),2020,32(02):13-21.[doi:10.3969/j.issn.2095-0411.2020.02.002]
　OU Hongxiang,LI Qiao,YE Qing,et al.Preparation of Metal-Organic Framework UiO-66 and Its Adsorption Performance on Methylene Blue[J].Journal of Changzhou University(Natural Science Edition),2020,32(02):13-21.[doi:10.3969/j.issn.2095-0411.2020.02.002]
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金属有机骨架材料UiO-66制备及吸附亚甲基蓝性能研究()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第32卷
期数:
2020年02期
页码:
13-21
栏目:
环境科学与工程
出版日期:
2020-03-28

文章信息/Info

Title:
Preparation of Metal-Organic Framework UiO-66 and Its Adsorption Performance on Methylene Blue
文章编号:
2095-0411(2020)02-0013-09
作者:
欧红香; 李 桥; 叶 青; 卫 宁; 郑旭东
(常州大学 环境与安全工程学院,江苏 常州 213164)
Author(s):
OU Hongxiang;  LI Qiao;  YE Qing;  WEI Ning;  ZHENG Xudong
(School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, China)
关键词:
溶剂热法;  金属有机骨架;  亚甲基蓝;  等温模型
Keywords:
solvo-thermalmethod;  metal organic framework;  methylene blue;  isotherm model
分类号:
X 506; X 703
DOI:
10.3969/j.issn.2095-0411.2020.02.002
文献标志码:
A
摘要:
以氯化锆为金属盐,对苯二甲酸为有机配体,N,N-二甲基甲酰胺为有机溶剂,采用溶剂热法制备了金属有机骨架材料UiO-66并用于溶液中亚甲基蓝(MB)的吸附。理化性能表征结果显示:所制备的UiO-66晶型结构良好,平均孔径为8.23 nm,BET比表面积为835.7 m2/g。通过静态吸附实验研究了初始浓度、溶液pH以及吸附时间等因素对UiO-66吸附MB性能的影响。结果表明:UiO-66用量0.5 g/L,MB初始质量浓度为160 mg/L,25 ℃下吸附12 h,吸附量可达191.1 mg/g,碱性条件有利于MB的吸附。Langmuir等温吸附模型相关系数R2大于0.993,能更好地描述等温吸附过程。动力学模型拟合结果表明,吸附过程为非理想单分子层化学吸附。经过5次吸附再生后UiO-66的吸附量约损失16.77%,有较好的循环再生性能。
Abstract:
Metal-organic frameworks UiO-66 were synthesized, using zirconium tetrachloride as the metal salt, terephthalic acid as the organic ligand and N,N-Dimethylformamide as the organic solvent, and were applied to adsorption and separation of methylene blue(MB)from aqueous solutions. The results of physical and chemical characterization indicated that the prepared UiO-66 possessed good crystal structure, with mean pore size of 8.23 nm and BET specific surface area of 835.7 m2/g. The effects of initial concentration, solution pH and contact time on MB adsorption performance of UiO-66 were analyzed by static adsorption experiments. The results showed that the adsorption capacity of UiO-66 achieved 191.1 mg/g under the following conditions: UiO-66 dosage was 0.5 g/L, initial concentration of MB was 160 mg/L, and adsorbing for 12 h at 25 ℃. The alkaline conditions were favorable for MB adsorption onto UiO-66. The correlation coefficients R2 of Langmuir isotherm model were greater than 0.993, and the isotherm adsorption process could be better described by the model. The fitting results of kinetic models showed that the adsorption process was non-ideal monolayer chemisorption. After 5 cycles of adsorption-regeneration the adsorption capacity of UiO-66 was lost about 16.77%, indicating a good reproducibility.

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备注/Memo

备注/Memo:
收稿日期:2019-10-31。
基金项目:国家自然科学基金资助项目(21878026); 江苏省研究生科研与实践创新计划资助项目(KYCX18_2620)。
作者简介:欧红香(1976—),女,湖南宜章人,博士,教授。E-mail:ouhongxiang@cczu.edu.cn
更新日期/Last Update: 2020-04-28