NaCu3 (BTC) 2 and LiCu3 (BTC) 2 (MOF) were synthesized using in situ sodium and lithium doping as hydrogen adsorbing materials. Phase stability and microstructure of the NaCu3 (BTC) 2 and LiCu3 (BTC) 2 materials were characterized by FT-IR, XRD, SEM, BET, and TGA. After in situ ions doping, the basic structures of NaCu3 (BTC) 2 and LiCu3 (BTC) 2 materials were not changed, but the surface area increased from 1300 to 1434 and 1445 m2 g-1, and the amount of hydrogen adsorbed increased from 1 to 1.4 and 1.6 wt% for NaCu3 (BTC) 2 and LiCu3 (BTC) 2 materials, respectively. Enhancement of hydrogen adsorption after sodium and lithium ion doping could be due to physical interaction (binding energy interaction) between hydrogen molecules and sodium ions and also due to increase of the surface area. It maybe that sodium and lithium ions act as an additional adsorption sites and adsorb hydrogen molecules.

In this research, various types of MOFs with different metal nodes such as iron, chromium, vanadium, and strontium were synthesized using benzene-1, 3, 5-tricarboxylic acid as an organic linker through a hydrothermal crystallization method. In continuation, the effect of pH, temperature, and reaction time on the properties of obtained MOFs have been studied. The synthesized nanocrystalline MOFs were systemically characterized using X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Fourier Transform InfraRed (FT-IR) spectroscopy. Therefore, synthesized catalysts were successfully carried out in the esterification reaction of oleic acid with methanol for the production of biodiesel. In addition, the operating conditions such as temperature and time of reaction, the molar ratio of methanol to oleic acid, and the amount of catalyst were studied. It was found among the prepared catalysts MIL-100(Fe) is the most appropriate catalyst for the esterification reaction of oleic acid with a yield of 78. 8% upon the optimum operating conditions. The catalytic activity of catalysts decreased in this order: Sr-BTC (52%), Cr-BTC (44%), and V-BTC (42%).

Fe-BTC (benzene tricarboxylic) synthesized by ultrasonic irradiation as a novel photo catalyst was investigated for degradation of methylene blue (MB)by UV/ photo catalyst system. In this study, for the first time, a facile ultrasonic method was employed to prepare Fe-BTC. The effects of temperature (50 and 70 °C) and irradiation time (90 and 120 min) were investigated to get the optimum photo catalyst. The nanoparticles of the synthesized Fe-BTC obtained were smaller and more homogeneous than those previously reported. The synthesized Fe-BTC samples showed good photocatalytic performance. The Fe-BTC 70-120 sample has shown the highest photocatalytic activity. The enhanced photocatalytic performance was related to two important factors which are the inhibition of the recombination process of the charge carriers and also the increase in the total area of the photo catalyst. The kinetics of degradation in this study has followed Langmuir-Hinshelwood pseudo-first-order theory. The Fe-BTC70-120 sample due to smaller particles and lower electron-hole recombination showed the highest photocatalytic degradation. The results of the mechanism showed the reactivity of hydroxyl radical oxidation in methylene blue degradation. The stability test also showed the high stability of Fe-BTC70-120 sample for three cycles. Photocatalytic degradation of MB by Fe-BTC with high activity and recycling stability may provide a new choice for wastewater treatment

In this study, Cu-BTC structures, one of the most widely used metal-organic frameworks (MOF), were synthesized by solvothermal technique, and the effect of metal-to-ligand ratio and the solvent content on their crystalline structure, chemical bonding, morphology, and porosity properties was investigated systematically by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, and N2 adsorption-desorption measurements, respectively. The results demonstrate that the metal-to-ligand molar ratio although does not noticeably affect the crystalline nature of the product, but observably controls the morphology so that spherical to octahedral microparticles can be achieved. In addition, the specific surface area (SSA) and total pore volume of the mesoporous structures are significantly enhanced to 969.5 m2g-1 and 0.41 cm3g-1, respectively, for a 1:1 molar ratio of metal to ligand. On the other hand, changing the solvent content greatly increased the SSA (1364.8 m2g-1) and total pore volume (0.561 cm3g-1) by ~41% and ~37%, respectively. This would be promising finding for wide range of applications requiring high SSA materials.

In this work, an artificial neural network (ANN) model along with a combination of adaptive neuro-fuzzy inference system (ANFIS) and particle swarm optimization (PSO) i. e. (PSO-ANFIS) are proposed for modeling and prediction of the propylene/propane adsorption under various conditions. Using these computational intelligence (CI) approaches, the input parameters such as adsorbent shape (SA), temperature (T), and pressure (P) were related to the output parameter which is propylene or propane adsorption. A thorough comparison between the experimental, artificial neural network and particle swarm optimization-adaptive neuro-fuzzy inference system models was carried out to prove its efficiency in accurate prediction and computation time. The obtained results show that both investigated methods have good agreements in comparison with the experimental data, but the proposed artificial neural network structure is more precise than our proposed PSO-ANFIS structure. Mean absolute error (MAE) for ANN and ANFIS models were 0. 111 and 0. 421, respectively.

In this work, the direct electrochemical oxidation of ethylene glycol (EG) on a nickel-based metal-organic framework (MOF)/multiwall carbon nanotubes (CNTs) hybrid composite electrode was investigated. This investigation is used to verify the possibility of using the Ni-MOF/CNTs electrode in the ethylene glycol fuel cells. The morphology of the composite layer on the surface of the electrode substrate was examined by scanning electron microscopy (SEM). The cyclic voltammetry technique was used to examine the typical electrocatalytic performance of the electrode. In 0.1 M NaOH solution, well-defined oxidation and reduction peaks of Ni2+/Ni3+ redox couple were observed. The electrocatalytic current at the Ni-MOF electrode was also studied for comparison with that of the Ni-MOF/CNTs electrode. Owing to the synergetic effect of the MOF and the CNTs, the Ni-MOF/CNTs electrode shows a satisfactory electrocatalytic activity toward the EG electro-oxidation, making it a promising candidate for use as an ideal anode material in direct alkaline alcohol fuel cells.

Metal organic frameworks (MOFs) are considered an interesting option for hydrogen storage. These materials show an exceptional H2 uptake. Here, Zn3 (BTC)2 as MOF was synthesized with a solvothermal method. The phase stability and microstructure of the Zn3 (BTC)2 was characterized in terms of their properties and structures, using a number of analytical techniques including FT-IR, XRD, SEM, BET and TGA. The analyses confirmed that the product has a conical shape structure with a Langmuir specific surface area of over 257m2/g. This MOF has shown to have a hydrogen storage capacity of 0.8 wt% at room temperature and 13 bar.