无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2026, Vol. 58 ›› Issue (1): 26-36.doi: 10.19964/j.issn.1006-4990.2025-0108

• 研究与开发 • 上一篇    下一篇

低温合成UiO-66及其吸附去除水中甲基橙性能研究

刘忆贤(), 马喜龙, 房春霞, 谢娟, 张志昆, 李鹏飞, 李正杰(), 韩继龙()   

  1. 河北科技大学化学与制药工程学院,河北 石家庄 050018
  • 收稿日期:2025-03-05 出版日期:2026-01-10 发布日期:2025-06-30
  • 通讯作者: 李正杰(1988— ),男,博士,副教授,研究方向为多孔材料制备与应用;E-mail:lizj@hebust.edu.cn
    韩继龙(1982— ),男,博士,副教授,研究方向为分离过程强化;E-mail:hanjilong@hebust.edu.cn
  • 作者简介:刘忆贤(1998— ),女,硕士研究生,研究方向为水稳定金属-有机骨架材料设计与应用;E-mail:871090182@qq.com
  • 基金资助:
    河北省高等学校科学技术研究项目(QN2022142);青海省科技援青重点研发与转化计划(2023-QY-211)

Study on low⁃temperature synthesis of UiO-66 and its adsorption performance for removing methyl orange from water

LIU Yixian(), MA Xilong, FANG Chunxia, XIE Juan, ZHANG Zhikun, LI Pengfei, LI Zhengjie(), HAN Jilong()   

  1. School of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology,Shijiazhuang 050018
  • Received:2025-03-05 Published:2026-01-10 Online:2025-06-30

摘要:

染料废水的高效处理是亟需解决的环境问题之一。以阴离子染料甲基橙(MO)为目标污染物,系统研究UiO-66材料的吸附性能及机理。通过溶剂热法在60、80、100 ℃下制备UiO-66-M系列材料(M为合成温度),并利用XRD、SEM、FT-IR和XPS等手段表征其结构特性。结果表明:低温合成的UiO-66-60具有较高的比表面积(1 386.6 m²/g)和较大的平均孔径(1.7 nm);同时因配体缺陷导致表面羟基密度增加,其零电荷点(pHpzc=6.8)明显高于UiO-66-80和UiO-66-100。吸附实验表明,UiO-66-60在pH=3.0、添加量为0.2 g/L时对MO的吸附量高达597.1 mg/g,优于多数文献报道的MOF基吸附剂。其吸附过程符合准二级动力学和Freundlich等温模型,表明其以多层吸附为主。机理分析表明,静电作用与π-π共轭是影响MO吸附过程的关键机制。吸附热力学分析表明,UiO-66-60对MO的吸附是自发放热过程。UiO-66-60凭借低温合成优势和高效吸附性能,可用作甲基橙染料废水处理的高效吸附剂。

关键词: 金属有机骨架, UiO-66, 低温合成, 甲基橙, 静电作用

Abstract:

The efficient treatment of dye wastewater is one of the urgent environmental problems that need to be addressed.Herein,the adsorption performance and mechanism of UiO-66 towards methyl orange(MO) were investigated systemically.Firstly,UiO-66-M(M represents the synthesized temperatures) were prepared by solvothermal method at 60,80 ℃,and 100 ℃,respectively.The structural and chemical properties of UiO-66-M were systematically characterized through XRD,SEM,FT-IR,and XPS measurements.Among the three UiO-66 materials,UiO-66-60 exhibited a higher specific surface area(1 386.6 m²/g) and larger average pore size(1.7 nm).Moreover,the increased ligand defects in UiO-66-60 led to a higher surface density of the hydroxyl groups,resulting in a increased point of zero charge(pHpzc=6.8) than that of UiO-66-80 and UiO-66-100.The adsorption experiments showed that UiO-66-60 achieved an exceptional MO adsorption capacity of 597.1 mg/g under optimized conditions(pH=3.0,adsorbent dosage=0.2 g/L),which was higher than that of the most reported MOF⁃based adsorbents.The adsorption process followed the pseudo⁃second⁃order kinetic model and Freundlich isotherm model,indicating that MO molecules were adsorbed onto UiO-66-60 in multilayer manner.The electrostatic interaction and π-π stacking interaction simultaneously contributed to the MO adsorption by UiO-66-60.The thermodynamic study indicated that the MO adsorption process was spontaneous and exothermic.Owing to the low⁃temperature synthesis advantage and superior adsorption performance,UiO-66-60 could sever as an efficient adsorbent for MO removal from dye wastewater.

Key words: MOFs, UiO-66, low?temperature synthesis, methyl orange, electrostatic attraction

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