武汉大学 资源与环境科学学院,湖北 武汉 430079
何德敏,女,硕士生,现从事工业水处理研究。E-mail:2020202050084@whu.edu.cn
E-mail: demingdeng@163.com
收稿:2022-04-20,
纸质出版:2023-06-24
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何德敏,邓德明.UiO-66-NH2(Ce)复合材料对酸性橙7的吸附性能[J].武汉大学学报(理学版),2023,69(3):304-312. DOI:10.14188/j.1671-8836.2022.0108.
HE Demin,DENG Deming.Adsorption Properties of UiO-66-NH2(Ce) Composites on Acid Orange 7 [J].J Wuhan Univ (Nat Sci Ed),2023,69(3):304-312. DOI:10.14188/j.1671-8836.2022.0108(Ch).
采用溶剂热法制备Zr基金属有机骨架UiO-66-NH
2
,将UiO-66-NH
2
掺杂稀土金属铈(Ce)制备了一种复合金属有机骨架材料UiO-66-NH
2
(Ce),对两种材料进行表征,并研究了UiO-66-NH
2
(Ce)对阴离子染料酸性橙7(AO7)的吸附性能。结果表明,两种材料的形貌和官
能团几乎一致,但UiO-66-NH
2
(Ce)的比表面积(618.50 m
2
/g)和孔容(0.303 3 cm
3
/g)均明显大于UiO-66-NH
2
;在pH 5.0、反应温度25 ℃、AO7初始质量浓度50 mg/L、反应时间60 min时,UiO-66-NH
2
(Ce)对于AO7的吸附量为303.0 mg/g、吸附率为85.8%;UiO-66-NH
2
(Ce)对AO7的吸附动力学符合准二级动力学模型,吸附过程符合Langmuir单分子层化学吸附模型,且吸附过程是吸热的、自发的;但因UiO-66-NH
2
(Ce)材料为粉末结晶体,经解析再生后,吸附性能有所下降,回收率较低。
Zr-based metal-organic framework UiO-66-NH
2
was prepared by solvent-thermal method
and a composite metal-organic framework material UiO-66-NH
2
(Ce) was prepared by UiO-66-NH
2
doped with rare earth metal element Cerium (Ce)
the two materials were characterized
and the adsorption performance of UiO-66-NH
2
(Ce) on the anion dye acid orange 7 (AO7) was studied. The results show that the morphology and functional groups of the two materials are almost identical
but the specific surface area (618.50 m
2
/g) and pore volume (0.303 3 cm
3
/g) of UiO-66-NH
2
(Ce) are significantly larger than those of UiO-66-NH
2
. The adsorption capacity of UiO-66-NH
2
(Ce) for AO7 is 303.0 mg/g and the adsorption rate is 85.8% at pH 5.0
reaction temperature 25 ℃
initial mass concentration of AO7 50 mg/L and reaction time 60 min. The adsorption kinetics of UiO-66-NH
2
(Ce) to AO7 conforms to the quasi-secondary kinetic model
and the adsorption process conforms to the Langmuir monolayer chemisorption model
and the adsorption process is spontaneous and endothermic. After regeneration by analysis
the adsorption performance of UiO-66-NH
2
(Ce) decreased
and the regeneration rate was low because the material is powder crystal.
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