低温合成UiO-66及其吸附去除水中甲基橙性能研究

doi:10.19964/j.issn.1006-4990.2025-0108

Abstract

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（pH_pzc=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

CLC Number:

TQ424

LIU Yixian, MA Xilong, FANG Chunxia, XIE Juan, ZHANG Zhikun, LI Pengfei, LI Zhengjie, HAN Jilong. Study on low⁃temperature synthesis of UiO-66 and its adsorption performance for removing methyl orange from water[J]. Inorganic Chemicals Industry, 2026, 58(1): 26-36.

Figures/Tables 17

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T/ ℃	Langmuir模型			Freundlich模型
T/ ℃	q_m/ （mg·g^-1）	k_L/ （L·mg^-1）	R²	k_F/［（mg·g^-1）·（L·mg^-1）^1/ⁿ ］	1/n	R²
25	1 402.6	0.023 2	0.943 6	51.5	0.712 8	0.999 0
35	826.5	0.043 5	0.987 1	74.1	0.536 4	0.997 9
45	751.9	0.047 8	0.983 0	79.4	0.497 2	0.997 4

吸附剂	q_max/（mg·g^-1）	吸附条件
Cu₂O/CuO-g-C₃N₄^［24］	241.3	添加量0.2 g/L，pH 6.0，30 ℃
Fe₃O₄/MIL101 （Al_0.9Fe_0.1）/NH₂^［26］	355.8^*	添加量0.4 g/L，pH 6.0，50 ℃
Cs/UiO-66^［27］	370.4^*	添加量0.5 g/L，pH 3.0，30 ℃
MIL-68（Al）^［29］	340.1^*	添加量0.4 g/L，pH 8.0，35 ℃
UIO-g-NL^［31］	961.5	添加量0.4 g/L，pH 5.0，25 ℃
N-NC-800^［25］	222.2^*	添加量0.4 g/L，pH 6.0，25 ℃
UiO-66^［27］	256.4^*	添加量0.5 g/L，pH 3.0，30 ℃
UiO-66-NH₂^［28］	148.4	添加量0.4 g/L，pH 5.0，25 ℃
Ce-doped UiO-66^［30］	639.6	添加量0.2 g/L，自然pH，25 ℃
UiO-66-60	597.1	添加量0.2 g/L，pH 3.0，25 ℃

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

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