بحوث سكوبس — زينب عبدالكريم فرحان

As a new 2D material, MXenes are anticipated to impact future energy storage and conversion technologies significantly. This article reviews recent progress in MXene-based nanomaterials for oxygen evolution reaction (OER). In addition, the method of synthesizing these materials as an OER and essential concepts to motivate future research were highlighted, and obstacles to the sustainable development of this field were presented. A-layer selective etching with aqueous solutions containing fluoride ions is now the preferred method for developing MXenes. Until now, the difficulty in synthesizing a wide variety of MXenes has been attributed to Al high reactivity with fluoride-based aqueous media, which is particularly potent for those produced from MAX-phase precursors of containing Al. © 2022 Hydrogen Energy Publications LLC

The Editor in Chief has retracted this article because of substantial overlaps with a previously-published article by different authors [1] and an article by the corresponding author that was under submission at the same time [2]. Additionally, an investigation by the Publisher has found a number of articles, including this one, which share similar concerns, involving but not limited to, irregularities with respect to submission and authorship. I. M. R. Fattah and Karolos J. Kontoleon agree to this retraction. Zainab A. Farhan, Ehsan kianfar and Salema K. Hadrawi did not respond to correspondence from the Editor about this retraction. © The Author(s), under exclusive licence to The Polymer Society of Korea 2024.

A new Fe3O4/Mo-MOF (metal–organic framework) magnetic nano polymer was synthesized in one step and Ultrasound assisted. Fe3O4/Mo-MOF magnetic nano polymer was characterized by XRD, SEM, EDX mapping BET, VSM, and FT-IR. The results of the structure confirmation revealed that the ultrasonic method had created unique properties in the Fe3O4/Mo-MOF magnetic nano polymer, and its biological and catalytic applications were investigated. A new pyrano[2,3-d]pyrimidines derivative was synthesized using the catalytic activity of Fe3O4/Mo-MOF magnetic nano polymer in a three-component reaction involving malononitrile, aldehyde derivatives, and barbituric acid derivatives with Fe3O4/Mo-MOF magnetic nano polymer as a magnetic catalyst. In the antimicrobial activity of Fe3O4/Mo-MOF magnetic nano polymer: Antimicrobial properties on gram-positive, gram-negative, and fungal strains based on MIC, MBC, and MFC value. The results of catalytic and biological studies proved that nanoparticles have unique properties attributed to their structure and synthesis method. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Hydrogen (H2) as a clean and environmentally-friendly carrier can be introduced as the fuel of future to mitigate the air pollution caused by industrial anthropogenic activities. With the aim of fulfilling the need of a green H2 green production, disparate technological processes have been developed in current decades. Purposeful review of these H2 production processes can allow the expert readers as well as non-expert readers to properly perceive the limitations and future perspectives for future research. H2 may be manufactured from renewable or non-renewable energy sources. Despite significant advancements in the techniques of H2 production, the emergence of various operational/technical challenges in obtaining a steady state and stable H2 economy via increasing the process yield and decreasing production costs has motivated the researchers the study more to develop more efficient processes. Therefore, development of a scientific techno-economic analysis for all existed H2 production techniques is of great importance to highlight the future perspective of this important energy source. The main objective of this paper is to comprehensively review the advantages and disadvantages of various H2 production techniques. Moreover, the economic dimensions of each technique along with the role of nanotechnology in the production of H2 are aimed to be reviewed in this paper. © 2023 Elsevier B.V.

Energy need is predicted to increase by 47% in the next 30 years. Global warming resulting from the continuously increasing atmospheric Carbon dioxide concentration is becoming a serious and pressing issue that needs to be controlled. Carbon dioxide capture and storage/use (CCS/CCU) provide a promising route to mitigate the environmental consequences of Carbon dioxide emission from fossil fuel combustion. In recent years, hollow fiber membrane contactors are regarded as an advanced technique with several competitive advantages over conventional technologies such as easy scale-up, independent control of flow rates, more operational flexibility, absence of flooding and foaming as well as high interfacial area per unit volume. However, many factors such as the membrane material selection, proper choice of solvent, and membrane module design are critical to success. In this regard, this paper aims at covering all areas related to hollow fiber membranes, including membrane material, membrane modification, membrane surface modification, shape, solvent characterization, operating parameters and costs, hybrid process, hydrophilicity and hydrophobicity of the absorption materials in the membranes, Advantages and Disadvantages of Membrane Contact Technology, membrane lifetime, and energy consumption as well as commercially available systems. Current progress, future potential, and development of pilot-scale applications and thermal fluid of this strategy are also assessed carefully. Furthermore, pore wetting as the main technical challenge in membrane contactor industrial implementation for post- and pre-combustion Carbon dioxide capture processes is investigated in detail. Graphical abstract: [Figure not available: see fulltext.] © 2023, The Author(s), under exclusive licence to The Polymer Society of Korea.

Developing novel and low-emission multi-generation systems is attracting considerable critical attention. In this regard, a novel tri-generation of power, fresh water and hot air has been developed in this study based on solid oxide fuel cell. Power has been generated by a solid oxide fuel cell, a gas turbine cycle and a super-critical carbon dioxide Brayton cycle. An air flow has been heated in a heat exchanger and fresh water has been produced through a desalination unit. Super-critical carbon dioxide Brayton cycle, heat exchanger of hot air and desalination unit have been all triggered by a co-combusted gas of apricot stone and synthesis gases of solid oxide fuel cell. Analysis of variance has been utilized to identify the significant influences on power production, fresh water, hot air, emission effect of system and system efficiency. Multi-objective optimization has showed that apricot stone of 200 kg/h, fuel utilization of 0.77, current density of 9697 A/m2 and pressure ratio of 3 in gas turbine system are the optimum conditions. The system has produced 2.10 MW of power, 837 g/h of fresh water and 57 m3/h of hot air with an emission effect of 2069 kg/MW.h and an efficiency of 43.5%. © 2023 The Institution of Chemical Engineers

Preparation of drug nanoparticles has been studied and evaluated in this study based on supercritical-based processing as green technology. Computational works have been conducted to evaluate the possibility of manufacturing nanomedicine using this novel technology, and the results are compared with experimental measurements. Chlorothiazide, used as a diuretic and as an antihypertensive was considered as model drug in this work. For the modeling, we used a small data set consisting of two input features, namely temperature and pressure, and one output, namely solubility, in order to analyze the data. Tree ensemble models, including bagging and boosting based on decision trees, have been selected to analyze and model the data. Extremely randomized Trees (Extra Tree), Adaptive Boosting (AdaBoost), and Gradient Boosting models are specifically chosen for this modeling. The hyperparameters of the models were optimized with the help of genetic algorithm (GA) and finally the optimal models were obtained for each of the three methods. Finally, the models were evaluated with different methods. Based on the evaluations, the gradient boosting model showed the best results, and its score was 0.9820 with the coefficient of determination (R2-score) criterion. Also, the error of the final model with the MEA criterion is 1.51 × 10-2, with the RMSE criterion equal to 2.51 × 10-2, and the MAPE error value is 1.59 × 10-2. © 2022 Elsevier B.V.

In this research, thin-walled steel energy absorbers were investigated. The introduced structures absorb energy through the processes of inversion, folding and expansion. Each absorber consists of two end-capped frusta and a cylindrical shell. The intended absorbers were experimentally made and then tested. The mechanical properties of the used materials were extracted by performing tensile tests and then used for simulation. The simulations of this research were carried out using LS-DYNA software. After comparing the experimental and numerical results, a good agreement between the results was observed and then the obtained results were discussed. The intended absorbers were examined in terms of the thickness of the lower frustum, the height of the middle shell and the angle of the upper frustum. The obtained results showed that by increasing the thickness of the lower frustum, energy absorption in the inversion process increased. In addition, the investigations related to the effect of height on the collapse properties showed that increasing the height of the middle shell with a thickness of 2 mm for the lower frustum led to a decrease in energy absorption. Also, in the investigations carried out on the half angle of the frustum, it was found that the contribution of energy absorption in the expansion process was low. © IMechE 2023.

It is necessary to determine whether synthetic dyes are present in food since their excessive use has detrimental effects on human health. For the simultaneous assessment of tartrazine and Patent Blue V, a novel electrochemical sensing platform was developed. As a result, two artificial azo colorants (Tartrazine and Patent Blue V) with toxic azo groups (-N[dbnd]N-) and other carcinogenic aromatic ring structures were examined. With a low limit of detection of 0.06 μM, a broad linear concentration range 0.09μM to 950μM, and a respectable recovery, scanning electron microscopy (SEM) was able to reveal the excellent sensing performance of the suggested electrode for patent blue V. The electrochemical performance of an electrode can be characterized using cyclic and differential pulse voltammetry, and electrochemical impedance spectroscopy. Moreover, the classification model was created by applying binary classification assessment using enhanced artificial intelligence comprises of support vector machine (SVM) and Genetic Algorithm (GA), respectively, a support vector machine and a genetic algorithm, which was then validated using the 50 dyes test set. The best binary logistic regression model has an accuracy of 83.2% and 81.1%, respectively, while the best SVM model has an accuracy of 90.3% for the training group of samples and 81.1% for the test group (RMSE = 0.644, R2 = 0.873, C = 205.41, and = 5.992). According to the findings, Cu-BTC MOF (copper (II)-benzene-1,3,5-tricarboxylate) has a crystal structure and is tightly packed with hierarchically porous nanomaterials, with each particle's edge measuring between 20 and 37 nm. The suggested electrochemical sensor's analytical performance is suitable for foods like jellies, condiments, soft drinks and candies. © 2022 Elsevier Ltd

The process of remote laser welding is simulated in this study to identify the keyhole-induced porosity generation mechanisms and keyhole. Three processes are simulated and discussed: laser power levels, laser-beam shaping configurations, and laser keyhole process. The simulation finding reveals that pore development is caused by strong melt flow behind the keyhole. As verification, the equivalent experimental test is also carried out. According to the findings, a welding speed with a high level helps to keep the keyholes released and prevents the flow of strong melt; a big advanced leaning-angle also provides inactive molten pool flow, making it difficult for bubbles to float to the backside of the molten pool. The conclusions of this study offer crucial insight into the method of porosity of aluminum (Al) alloys laser welding, as well as advice on how to avoid keyhole-induced porosity. It is also obtained that a smaller laser beam with constant power raises the velocity, welding pool depth, and liquid metal temperature. © 2022 Institute of Advanced Engineering and Science. All rights reserved.