scholarly journals Facile Fabrication of Amino-Functionalized MIL-68(Al) Metal-organic Framework for Effective Adsorption of Arsenate (As(V))

2022 ◽  
Author(s):  
Alireza Rahmani ◽  
Amir Shabanloo ◽  
Solmaz Zabihollahi ◽  
Mehdi Salari ◽  
Mostafa Leili ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Quadratic Model ◽  
System Response ◽  
P Value ◽  
Order Kinetic ◽  
Solution Ph ◽  
Metal Organic ◽  
Organic Framework

Abstract An amino-functionalized MIL-68(Al) metal-organic framework (amino-MIL-68(Al) MOF) was synthesized by solvothermal method and then characterized by FESEM, XRD, FTIR, EDX-mapping, and BET-BJH techniques. In order to predict arsenate (As(V)) removal, a robust quadratic model (R2 > 0.99, F-value = 2389.17 and p-value < 0.0001) was developed by the central composite design (CCD) method and then the genetic algorithm (GA) was utilized to optimize the system response and four independent variables. The results showed that As(V) adsorption on MOF was affected by solution pH, adsorbent dose, As(V) concentration and reaction time, respectively. Predicted and experimental As(V) removal efficiencies under optimal conditions were 99.45 and 99.87 %, respectively. The fitting of experimental data showed that As(V) adsorption on MOF is well described by the nonlinear form of the Langmuir isotherm and pseudo-second-order kinetic. At optimum pH 3, the maximum As(V) adsorption capacity was 74.29 mg/g. Thermodynamic studies in the temperature range of 25 to 50 °C showed that As(V) adsorption is a spontaneous endothermic process. The reusability of MOF in ten adsorption/regeneration cycles was studied and the results showed high reusability of this adsorbent. The highest interventional effect in inhibiting As(V) adsorption was related to phosphate anion. The results of this study showed that amino-MIL-68(Al) can be used as an effective MOF with a high surface area (> 1000 m2/g) and high reusability for As(V)-contaminated water.

scholarly journals Experimental and Modeling of Dicamba Adsorption in Aqueous Medium Using MIL-101(Cr) Metal-Organic Framework

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 419
Author(s):  
Hamza Ahmad Isiyaka ◽  
Khairulazhar Jumbri ◽  
Nonni Soraya Sambudi ◽  
Jun Wei Lim ◽  
Bahruddin Saad ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Adsorption Capacity ◽  
Environmental Concern ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Data Matrix ◽  
Adsorption Parameters ◽  
Metal Organic ◽  
Organic Framework

Drift deposition of emerging and carcinogenic contaminant dicamba (3,6-dichloro-2-methoxy benzoic acid) has become a major health and environmental concern. Effective removal of dicamba in aqueous medium becomes imperative. This study investigates the adsorption of a promising adsorbent, MIL-101(Cr) metal-organic framework (MOF), for the removal of dicamba in aqueous solution. The adsorbent was hydrothermally synthesized and characterized using N2 adsorption-desorption isotherms, Brunauer, Emmett and Teller (BET), powdered X-ray diffraction (XRD), Fourier Transformed Infrared (FTIR) and field emission scanning electron microscopy (FESEM). Adsorption models such as kinetics, isotherms and thermodynamics were studied to understand details of the adsorption process. The significance and optimization of the data matrix, as well as the multivariate interaction of the adsorption parameters, were determined using response surface methodology (RSM). RSM and artificial neural network (ANN) were used to predict the adsorption capacity. In each of the experimental adsorption conditions used, the ANN gave a better prediction with minimal error than the RSM model. The MIL-101(Cr) adsorbent was recycled six times to determine the possibility of reuse. The results show that MIL-101(Cr) is a very promising adsorbent, in particular due to the high surface area (1439 m2 g−1), rapid equilibration (~25 min), high adsorption capacity (237.384 mg g−1) and high removal efficiency of 99.432%.

Highly stable metal-organic framework UiO-66-NH2 for high-performance triboelectric nanogenerators

2021 ◽  
Author(s):  
Yong-Mei Wang ◽  
Xinxin Zhang ◽  
Dingyi Yang ◽  
Liting Wu ◽  
Jiaojiao Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Triboelectric Nanogenerator ◽  
High Porosity ◽  
Chemically Modified ◽  
Metal Organic ◽  
Triboelectric Nanogenerators ◽  
Organic Framework

Abstract The high porosity, controllable size, high surface area, and chemical versatility of a metal-organic framework (MOF) enable it a good material for a triboelectric nanogenerator (TENG), and some MOFs have been incorporated in the fabrication of TENGs. However, the understanding of effects of MOFs on the energy conversion of a TENG is still lacking, which inhibits the improvement of the performance of MOF-based TENGs. Here, UiO-66-NH2 MOFs were found to significantly increase the power of a TENG and the mechanism was carefully examined. The electron-withdrawing ability of Zr-based UiO-66-family MOFs was enhanced by designing the amino functionalized 1,4-terephthalic acid (1,4-BDC) as ligand. The chemically modified UiO-66-NH2 was found to increase the surface roughness and surface potential of a composite film with MOFs embedded in polydimethylsiloxane (PDMS) matrix. Thus the total charges due to the contact electrification increased significantly. The composite-based TENG was found to be very durable and its output voltage and current were 4 times and 60 times higher than that of a PDMS-based TENG. This work revealed an effective strategy to design MOFs with excellent electron-withdrawing abilities for high-performance TENGs.

Formation of a Metal-Organic Framework with High Surface Area and Gas Uptake by Breaking Edges Off Truncated Cuboctahedral Cages

2013 ◽  
Vol 125 (43) ◽  
pp. 11492-11495 ◽  
Author(s):  
Ruirui Yun ◽  
Zhiyong Lu ◽  
Yi Pan ◽  
Xiaozeng You ◽  
Junfeng Bai
Keyword(s):  
Surface Area ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Gas Uptake ◽  
Metal Organic ◽  
Organic Framework

scholarly journals A new metal–organic framework with ultra-high surface area

2014 ◽  
Vol 50 (26) ◽  
pp. 3450 ◽  
Author(s):  
Ronny Grünker ◽  
Volodymyr Bon ◽  
Philipp Müller ◽  
Ulrich Stoeck ◽  
Simon Krause ◽  
...  
Keyword(s):  
Surface Area ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Metal Organic ◽  
Organic Framework

A high surface area Zr(IV)-based metal–organic framework showing stepwise gas adsorption and selective dye uptake

2015 ◽  
Vol 223 ◽  
pp. 104-108 ◽  
Author(s):  
Xiu-Liang Lv ◽  
Minman Tong ◽  
Hongliang Huang ◽  
Bin Wang ◽  
Lei Gan ◽  
...  
Keyword(s):  
Surface Area ◽  
Gas Adsorption ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Dye Uptake ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Adsorption of Nitrogen on Mn(II) Metal-organic Framework Nanoparticles

2021 ◽  
pp. 4164-4177
Author(s):  
Idongesit Justina Mbonu ◽  
Olusegun Kehinde Abiola
Keyword(s):  
Density Functional ◽  
High Pressures ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Good Thermal Stability ◽  
Adsorption Of Nitrogen ◽  
Metal Organic ◽  
Ft Ir ◽  
Organic Framework

Adsorption of N2 on mixed ligand benzoic acid and 1, 10-phenanthroline ligands of Mn(II) metal-organic framework (MOF)–nanoparticles were demonstrated. The adsorption capacity and pore size distribution of the synthesized MOF were conducted experimentally by measuring the N2 adsorption isotherm at 77.3 K. The resulting data were fitted to Brunauer-Emmett-Teller (BET), de Boer, Dubinin-Redusbkevich (DR), Banet-Joyner-Halenda (BJH), Horvath-Kawazoe (HK) and Density Functional Theory (DFT) models to describe the adsorptive behaviour of the synthesized nanoparticles. The DSC analysis shows the high chemical stability of this compound. The FT-IR measurement reports present the abundant of highly coordinated functional groups. And the adsorption properties evaluated by different adsorption models compared with existing adsorbent materials suggest Mn-MOF with good thermal stability, high surface area and pore openings, is a promising material for storing gases and energy because at low or high pressures, it can adsorb nitrogen gas due to its large openings.

Novel crystalline nanoporous iron phosphonate based metal-organic framework as an efficient anode material for lithium ion batteries

2021 ◽  
Author(s):  
Debabrata Chakraborty ◽  
Tapabrata Dam ◽  
Arindam Modak ◽  
Kamal K Pant ◽  
Bijan Krishna Chandra ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Surface Area ◽  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Lithium Ion ◽  
Energy Research ◽  
Porous Architecture ◽  
Metal Organic ◽  
Organic Framework

Metal-organic framework (MOF) materials show extraordinary performances in several frontier applications of energy research due to their well-defined crystalline porous architecture, high surface area and periodicity of the functional groups...

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