TY - JOUR
T1 - Defective UiO-67 for enhanced adsorption of dimethyl phthalate and phthalic acid
AU - Liu, Qing
AU - Ye, Jiahua
AU - Han, Yu
AU - Wang, Peiming
AU - Fei, Zhaoyang
AU - Chen, Xian
AU - Zhang, Zhuxiu
AU - Tang, Jihai
AU - Cui, Mifen
AU - Qiao, Xu
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - It is imperative to remove endocrine disrupting compounds (EDCs) from water because of their damage to human health via drinking, eating and skin contacting. Herein, a variety of UiO-67 samples, with different numbers of defects were screened for the adsorption elimination of dimethyl phthalate (DMP) and phthalic acid (PA) in aqueous solution. UiO-67-30BA (benzoic acid regulator with 30 times molar number of ligands) which had the greatest number of missing-links and the highest specific surface area, was determined by thermogravimetric analysis (TGA), nuclear magnetic resonance (1H-NMR), and energy-dispersive X-ray spectroscopy (EDS) and N2 adsorption-desorption. The adsorption kinetics of PA and DMP on UiO-67-30BA well obeyed pseudo-first-order kinetic model and the adsorption isotherms well followed Langmuir model. Adsorption thermodynamics indicated that the adsorption process was an exothermic and spontaneous process. Remarkably, UiO-67-30BA with the most defects showed the third highest PA and highest DMP adsorption capacity compared with reported MOFs materials, which were 434.0 and 228.1 mg/g, respectively. Furthermore, the dominant interactions between PA and UiO-67 samples were electrostatic interaction and π-π interaction, while the adsorption of DMP depended on π-π interaction. The introduction of missing-links not only provided an outstanding adsorbent UiO-67-30BA for DMP and PA, but also revealed the different adsorption mechanisms of the adsorbents.
AB - It is imperative to remove endocrine disrupting compounds (EDCs) from water because of their damage to human health via drinking, eating and skin contacting. Herein, a variety of UiO-67 samples, with different numbers of defects were screened for the adsorption elimination of dimethyl phthalate (DMP) and phthalic acid (PA) in aqueous solution. UiO-67-30BA (benzoic acid regulator with 30 times molar number of ligands) which had the greatest number of missing-links and the highest specific surface area, was determined by thermogravimetric analysis (TGA), nuclear magnetic resonance (1H-NMR), and energy-dispersive X-ray spectroscopy (EDS) and N2 adsorption-desorption. The adsorption kinetics of PA and DMP on UiO-67-30BA well obeyed pseudo-first-order kinetic model and the adsorption isotherms well followed Langmuir model. Adsorption thermodynamics indicated that the adsorption process was an exothermic and spontaneous process. Remarkably, UiO-67-30BA with the most defects showed the third highest PA and highest DMP adsorption capacity compared with reported MOFs materials, which were 434.0 and 228.1 mg/g, respectively. Furthermore, the dominant interactions between PA and UiO-67 samples were electrostatic interaction and π-π interaction, while the adsorption of DMP depended on π-π interaction. The introduction of missing-links not only provided an outstanding adsorbent UiO-67-30BA for DMP and PA, but also revealed the different adsorption mechanisms of the adsorbents.
KW - Adsorption mechanism
KW - Dimethyl phthalate
KW - Metal-organic frameworks
KW - Phthalic acid
KW - UiO-67
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85093923261&partnerID=8YFLogxK
U2 - 10.1016/j.molliq.2020.114477
DO - 10.1016/j.molliq.2020.114477
M3 - 文章
AN - SCOPUS:85093923261
SN - 0167-7322
VL - 321
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 114477
ER -
