scholarly journals Efficient Adsorption of Pb(II) from Aqueous Solutions by Metal Organic Framework (Zn-BDC) Coated Magnetic Montmorillonite

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1383 ◽  
Author(s):  
Jian Shen ◽  
Nan Wang ◽  
Yang Wang ◽  
Di Yu ◽  
Xiao–kun Ouyang
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Mechanism ◽  
In Situ Polymerization ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
High Adsorption ◽  
Metal Organic ◽  
Good Potential ◽  
Organic Framework

Composite adsorption materials combine the advantages of various adsorptive materials and compensate for the defects of single adsorbents. Magnetic montmorillonite (MMMT) shows good adsorption properties for Pb(II). In order to further improve the adsorption properties of MMMT, in this work, Zn-BDC, a kind of metal–organic framework (MOF), was modified onto the surface of MMMT by in situ polymerization. The composite material MMMT@Zn-BDC was characterized by Zetasizer, SEM, TEM, FTIR, XRD, VSM, and XPS. The influence of adsorption conditions on the adsorption capacity of MMMT@Zn-BDC for Pb(II) was examined, including the adsorbent dosage, pH of Pb(II) solution, initial concentration of Pb(II), and the temperature and adsorption time. Also, the adsorption mechanism was studied. The results of this study show that MMMT@Zn-BDC adsorbs Pb(II) via chemisorption. In addition, MMMT@Zn-BDC exhibits good potential for adsorbing Pb(II), including its high adsorption capacity (724.64 mg/g) and good recyclability.

scholarly journals In Situ Polymerization of Polypyrrole @ Aluminum Fumarate Metal–Organic Framework Hybrid Nanocomposites for the Application of Wastewater Treatment

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1764
Author(s):  
Sarah Zayan ◽  
Ahmed Elshazly ◽  
Marwa Elkady
Keyword(s):  
Surface Area ◽  
In Situ Polymerization ◽  
Metal Organic Framework ◽  
Oxidative Polymerization ◽  
Absorption Spectrometry ◽  
Hybrid Nanocomposites ◽  
Bet Surface Area ◽  
Metal Organic ◽  
Organic Framework

Composite metal–organic frameworks combine large and accessible surface areas with low density and high stability. Herein, we present novel nanocomposites of polypyrrole/aluminum fumarate metal–organic framework (PPy/AlFu MOF), which were synthesized via in situ oxidative polymerization with the aim of MOF functionalization to enhance its thermal stability and increase the specific surface area so that these nanocomposites may be used as potential adsorbents. The synthesized nanocomposites were characterized by various techniques, such as powder X-ray diffraction, scanning electron microscopy, and Fourier-transform infrared spectroscopy (FTIR). The successful functionalization of aluminum fumarate MOF was confirmed by FTIR, and the Brunauer–Emmett–Teller (BET) surface area of the PPy/MOF nanocomposite slightly increased from 795 to 809 m2/g. Thermogravimetric analysis data also show that the weight loss of the composite is up to 30% at temperatures up to 500 ℃. Remarkably, lead (50 ppm) sequestration using the composite was tested, and the atomic absorption spectrometry data demonstrate that PPy/MOF is a super-adsorbent for heavy metal ions. This work shows that the novel polymer–MOF composites are promising materials for the selective removal of lead from wastewater streams.

A new anionic metal–organic framework showing tunable emission by lanthanide(III) doping and highly selective CO2 adsorption properties

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 24655-24660 ◽  
Author(s):  
Rong-Ying Chen ◽  
Dan Tian ◽  
Yun-Wu Li ◽  
Ying-Bin Lv ◽  
Hong-Wei Sun ◽  
...  
Keyword(s):  
Co2 Adsorption ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
High Adsorption ◽  
Adsorption Selectivity ◽  
Metal Organic ◽  
Tunable Emission ◽  
Organic Framework

A 3D porous anionic MOF (1), decorated with -NH2 and N sites, can serve as a host for the encapsulation of lanthanide(iii) cations for emission tuning. Besides, it also shows high adsorption selectivity for CO2 over CH4 and N2 at 273 K.

scholarly journals High CO2 Adsorption Enthalpy Enabled by Uncoordinated N-Heteroatom Sites of a 3D Metal-Organic Framework

2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Yongting Zhao ◽  
Yiming Xie
Keyword(s):  
Room Temperature ◽  
Co2 Adsorption ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
X Ray Diffraction ◽  
High Adsorption ◽  
Adsorption Enthalpy ◽  
X Ray ◽  
Metal Organic ◽  
Organic Framework

A 3D metal-organic framework (MOF), Mn2L2(H2O)2 · (DMF) {H2L = 5- (Pyridin-2-yl)-3, 3′-bi (1H-1,2,4-triazole)} (1) with uncoordinated N-heteroatom sites, has been obtained through hydrothermal method and structurally characterized by X-ray structural analysis, powder X-ray diffraction (PXRD), and thermal analysis (TGA). The framework of compound 1 exhibits fascinating adsorption properties and shows high adsorption enthalpy of CO2. The experimental results prove which uncoordinated nitrogen heteroatom sites can markedly increase the reciprocity between host frame and CO2 at room temperature.

In situ synthesis of titanium doped hybrid metal–organic framework UiO-66 with enhanced adsorption capacity for organic dyes

2017 ◽  
Vol 4 (11) ◽  
pp. 1870-1880 ◽  
Author(s):  
Yitong Han ◽  
Min Liu ◽  
Keyan Li ◽  
Qiao Sun ◽  
Wensheng Zhang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Congo Red ◽  
Organic Dyes ◽  
Metal Organic Framework ◽  
In Situ Synthesis ◽  
Adsorption Ability ◽  
Metal Organic ◽  
Enhanced Adsorption ◽  
Organic Framework

The adsorption ability of zirconium-based MOF UiO-66 for Congo red can be greatly promoted via the doping of Ti4+.

scholarly journals A regenerative metal–organic framework for reversible uptake of Cd(ii): from effective adsorption to in situ detection

2016 ◽  
Vol 7 (9) ◽  
pp. 5983-5988 ◽  
Author(s):  
Hui Xue ◽  
Qihui Chen ◽  
Feilong Jiang ◽  
Daqiang Yuan ◽  
Guangxun Lv ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
High Adsorption ◽  
Low Concentration ◽  
Fast Detection ◽  
Metal Organic ◽  
In Situ Detection ◽  
Organic Framework

A metal–organic framework with high adsorption and selectivity for reversible uptake of Cd(ii) was developed. Both fast detection of Cd(ii) at low concentration and in situ reconstruction of the used MOF were successfully achieved.

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