Article
Thermodynamics
M. Asgari, M. Javidan, M. Nozari, A. Asgari, D. D. Ganji
Summary: The study found that using thinner branch-shaped fins and hybrid Al2O3 - Cu with a volume ratio of 0.04 has a greater impact on the solidification process of phase change materials. Additionally, the use of fins significantly speeds up the solidification process and thinner fins are more effective in increasing heat transfer rate compared to thicker fins. Generally, the simultaneous use of thin branch-shaped fins and nanoparticles with a volume fraction of 0.04 leads to maximum efficiency in the simulation.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Tarek Bouzennada, Aissa Abderrahmane, Obai Younis, Mowffaq Oreijah, Kamel Guedri, Chemseddine Maatki, Lioua Kolsi
Summary: This article investigates the use of novel dendritic fins to accelerate heat distribution and fusion rates of NEPCM in rectangular capsules. The findings show that integrating fins in the lower region of the capsules extends the heat transfer area and reduces thermal resistance and fusion time. The maximum heat transfer rate and shortest fusion time were achieved with fin type 2 and a nanoparticle volume fraction of 6%. Further research on the dimension characteristics of these fins, such as the number of branches and their spacing, is recommended.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Waleed Hamali, Musawa Yahya Almusawa
Summary: This essay examines the freezing of PCM (water) using Y-shaped fins and nano-powders. It is found that adding nanoparticles and changing the shape factor can significantly reduce the freezing time.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Obai Younis, Aissa Abderrahmane, Houssem Laidoudi, Nevzat Akkurt, Bandar M. Fadhl, Kamel Guedri
Summary: This work aims to contribute to the positive evolution towards a green world and green energy by studying the natural convection of Nano-Enhanced Phase Change Material NEPCM in an inverted U-shaped cavity. The effects of factors such as Rayleigh number, number of ripples of the upper wall, position of the square body, volume fraction of nanoparticles, and magnetic field strength on the heat transfer rate are presented and discussed.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Mladen Bosnjakovic, Ante Cikic, Simon Muhic, Mario Holik
Summary: New correlation equations for heat transfer and pressure drop in a finned heat exchanger with star-shaped stainless-steel fins were developed in this study by conducting numerical analysis of various heat exchanger geometries and utilizing laboratory tests of a model with star-shaped fins. The correlations were validated for Reynolds numbers ranging from 2000 to 16,000, with deviations from experimental results within acceptable limits for different ranges of Reynolds numbers.
APPLIED SCIENCES-BASEL
(2021)
Article
Energy & Fuels
Li-E Yan, Nidal H. Abu-Hamdeh, Rashad A. R. Bantan, Mahmoud M. Selim
Summary: Spiral pipes with hot hybrid nanomaterials were used to improve the heat storage capacity of paraffin, with the effects of Reynolds numbers on charging rates examined. Results showed that Reynolds numbers had varying impacts on heat storage capacity at different time intervals.
JOURNAL OF ENERGY STORAGE
(2021)
Review
Energy & Fuels
Xueliang Zhu, Yan Li, Qunzhi Zhu
Summary: In the process of industrial waste heat recovery, phase change heat storage technology is popular due to its high heat storage density and constant temperature absorption/release process. This paper summarizes the development of new fins in the industry and the optimization results of size, shape, and arrangement. The research shows that multi-branch structure, non-uniform fin array, and targeted fin arrangement can enhance heat transfer.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Multidisciplinary
Nidhal Ben Khedher, Hussein Togun, Azher M. M. Abed, Hayder I. I. Mohammed, Jasim M. M. Mahdi, Raed Khalid Ibrahem, Wahiba Yaici, Pouyan Talebizadehsardari, Amir Keshmiri
Summary: This study aims to investigate the impact of circular Y-shaped fins on a two-pipe latent heat-saving unit compared with conventional circular fins, in order to overcome the weak thermal conduction of phase change materials (PCM). The system is placed in a straight-up orientation, with the PCM located in the annulus and hot water used to charge the PCM. Various geometric factors of the fins, such as stem length, angle of the tributaries, and number of Y-shaped fins, are analyzed. The sensitivity analysis evaluates the influence of Reynolds number and temperature of the working fluid on the melting time and rate, with results showing that increasing fin height and number, and reducing tributary angles lead to improved system performance. Increasing Reynolds number and raising working fluid temperature also result in significant reductions in melting time.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2023)
Article
Chemistry, Multidisciplinary
Azher M. Abed, Hosseinali Ramezani Mouziraji, Jafar Bakhshi, Anmar Dulaimi, Hayder Mohammed, Raed Khalid Ibrahem, Nidhal Ben Khedher, Wahiba Yaici, Jasim M. Mahdi
Summary: This study numerically evaluates the effects of arc-shaped fins on the melting capability of a triplex-tube confinement system filled with phase-change materials. The results show that the arc-shaped fins greatly enhance the melting rate and heat-storage properties of the PCMs. The study also investigates the influence of fin layout, natural convection, Reynolds number, and temperature of the heat-transfer fluid.
FRONTIERS IN CHEMISTRY
(2022)
Article
Thermodynamics
Shouguang Yao, Min Zuo, Xinyu Huang
Summary: Adding fins to a shell-and-tube phase change thermal storage is an effective way to enhance its performance. This paper presents a novel V-shaped fin structure for the triplex-tube thermal storage unit and studies its heat storage performance through numerical simulation. The results show that the optimal arrangement of V-shaped fins can significantly reduce the melting time of the PCM compared to the conventional rectangular fins.
JOURNAL OF THERMAL SCIENCE
(2023)
Article
Energy & Fuels
H. Saleh, Z. Siri, M. Ghalambaz
Summary: The current study numerically investigates the free convection of a hybrid nanofluid in an asymmetrical U-shaped enclosure, showing that adding 1% nano-capsules can enhance global heat transfer by more than 9%. It is found that a symmetrical U-shaped enclosure does not provide the maximum heat transfer performance, and the effect of changing the basin location on heat transfer enhancement is minimal at moderate aspect ratios and fusion temperatures.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Bingkun Huang, Shimi Yang, Xiuxiu Li, Jun Wang, Peter D. Lund
Summary: Phase change materials (PCMs) are effective for thermal energy storage and supply-demand balance. Numerical analyses were performed to improve the melting-solidification process in PCMs using a 2-D cavity with two heat sources and wavy sinusoidal fins. The influence of different fin arrangements was analyzed.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Jiangwei Liu, Pengfei Hu, Zunpeng Liu, Changda Nie
Summary: This study examined the effect of T-shaped fins on the melting performance of phase change materials (PCMs) compared to traditional longitudinal plate fins. The results showed that T-shaped fins can significantly enhance the melting process, shortening the melting time and improving the melting uniformity. Specifically, horizontally and vertically arranged T-shaped fins save 34.5% melting time compared to longitudinal plate fins. Additionally, optimizing the length ratio of the vertical and horizontal portions of the T-shaped fins further improves the melting performance, with a length ratio of 1.33 saving 47.1% melting time compared to longitudinal plate fins.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Yongliang Shen, Abdur Rehman Mazhar, Pengwei Zhang, Shuli Liu
Summary: The structure optimization of tree-shaped fins is important for enhancing heat transfer performance in latent heat storage systems. Through the coupling of a genetic algorithm and CFD simulation, the structure of the tree-shaped fins was optimized, leading to reduced phase transition time and increased heat transfer rate and coefficient. This study provides a method for structural optimization and expands the application prospects of tree-shaped fins in the field of latent heat storage.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Physics, Applied
Ammar A. A. Melaibari, Nidal H. H. Abu-Hamdeh, Khaled O. O. Daqrouq, Abulhameed F. F. Alkhateeb, Osama K. K. Nusier, Hosam A. A. Saad, Awad Musa
Summary: Researchers combined the container with fins and mixed PCM with nanoparticles to achieve faster discharging process. Two important variables are the fraction of additives (phi) and their shapes (m). The equations were simplified by applying single phase formulation due to the low velocity of liquid material during freezing. The Galerkin method used in this modeling is consistent with previous research. Increasing the fraction of additives (phi) decreased the solidification time from 4802.97s to 4244.61s, and further to 3738.37s when blade-shaped particles were used, indicating a 22.16% enhancement in process rate. Additionally, increasing the shape factor led to a 5.7% decrease in time.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Engineering, Multidisciplinary
Zing L. T. Tran, Tam T. Truong, T. Nguyen-Thoi
Summary: This study proposes a new method called DNN-DE, which combines deep neural networks (DNN) with differential evolution (DE), for optimizing the frequency of laminated functionally graded carbon nanotube (FG-CNT)-reinforced composite quadrilateral plates under free vibration. The DNN is used to predict the objective and constraints, replacing the time-consuming finite element analysis (FEA) procedures, while the DE acts as an optimizer. Numerical examples are provided to demonstrate the performance of the proposed method, and the results are compared with those obtained by other methods to verify its reliability and effectiveness. The study also investigates the influence of various parameters on the optimal results, such as boundary conditions, CNT volume fraction, and CNT distribution.
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
(2023)
Article
Chemistry, Physical
M. Habibnia, M. Sheikholeslami, S. M. Tabarhoseini, Ali Taheri, M. Sheykhi
Summary: This study focuses on the evaluation of cutting fluids in the turning process. The results show that employing nanofluid minimum quantity lubrication strategy can lead to an average temperature reduction of about 60% in the cutting tool during Mo40 steel turning. Furthermore, increasing the concentration of the nanofluid can further decrease the temperature.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Thermodynamics
Mehdi Asgari, Mohammad Javidan, Mosayeb Gholinia Hassankolaei, Mohammad Nozari, Aliasghar Asgari, Davood Domiri Ganji
Summary: This article investigates the use of cross-shaped fins and different forms and volume fractions of Copper(II) oxide nanoparticles to improve the thermal efficiency of paraffin phase change materials (PCMs). Increasing the volume ratio of nanoparticles and shape coefficient can shorten the solidification time, while increasing the length of cross-shaped fins enhances the solidification rate and heat transfer. It was found that when the inner and outer walls are involved in the solidification process simultaneously, the solidification rate increases by more than 66%.
Article
Thermodynamics
S. S. Ghadikolaei, Soheil Siahchehrehghadikolaei, M. Gholinia, Masoud Rahimi
Summary: This numerical study investigates the laminar flow and heat transfer of a single-phase covalently functionalized graphene nanoplatelets (CGNPs)/H2O green nanofluid in a liquid block heat sink with novel fin designs and nature-based algorithms. The study analyzes the influence of Reynolds number, nanoparticle volume fraction, and baseplate designs on CPU temperature, pumping power, heat transfer coefficient, and thermal efficiency. The spider netted baseplate design proves to be the most effective in lowering temperature, while the concentration of nanofluid and Reynolds number directly affect the heat transfer coefficient. The improvement of thermal output is highest when using the spider netted baseplate design and CGNPs 0.075%wt/H2O green nanofluid flow.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
M. M. Bhatti, R. Ellahi
Summary: This article presents a numerical study of non-Darcian nanofluid flow through a stretchable elastic surface. The study considers the fluid's viscosity, electrical conductivity, and propagation through a porous material. Heat radiation, Brownian motion, and viscous dissipation are also taken into account in the flow configuration. Mathematical modeling using similarity variables results in coupled nonlinear differential equations. Numerical solutions are obtained using the Keller-box approach and finite difference scheme in Matlab software. Tables are used to analyze and report physical quantities of interest.
NUMERICAL HEAT TRANSFER PART B-FUNDAMENTALS
(2023)
Article
Engineering, Civil
Duy-Khuong Ly, Vinyas Mahesh, Chanachai Thongchom, T. Nguyen-Thoi
Summary: This study proposes an advanced cell-based smoothed discrete shear gap method (CS-DSG3) using zig-zag theory integrated with a hybrid control mechanism for analysis of smart damping control of laminated functionally graded carbon nanotube reinforced composite (FG-CNTRC) shell structures. The study successfully combines CS-DSG3 with zig-zag theory to provide an effective global-local numerical approach for analyzing the behavior of laminated FG-CNTRC shell structures.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Physical
Mehdi Safari, Amir Hossein Rabiee, Jalal Joudaki
Summary: The laser tube bending process (LTBP) is an effective manufacturing method that eliminates the need for bending dies and enables more accurate and economical tube bending. This study predicts the main bending angle and lateral bending angle in LTBP using support vector regression (SVR) modeling, with input data derived from experimental tests. The SVR models achieved high accuracy in predicting the bending angles, indicating the potential for applying SVR in LTBP.
Article
Multidisciplinary Sciences
Z. Khalili, M. Sheikholeslami, Ladan Momayez
Summary: In this study, a combination of thermoelectric generator (TEG) layer with conventional layers of photovoltaic-thermal (PVT) modules is used to utilize waste heat and improve efficiency. A cooling duct is installed at the bottom of the PVT-TEG unit to reduce the cell temperature. The type of fluid and structure of the duct affect the system performance. Hybrid nanofluid and three different duct configurations are implemented, and simulations show that the elliptic structure performs the best with a 6.29% enhancement in overall performance.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
M. Jafaryar, M. Sheikholeslami
Summary: In this paper, the application of new structure and loading Graphene nanoparticles to enhance thermal storage systems has been studied. Aluminum layers were used in the paraffin zone, which has a melting temperature of 319.55 K. The paraffin zone was located in the middle section of a triplex tube, with uniform hot temperatures (335 K) applied to both walls of the annulus. Three container geometries were tested by changing the angle of fins (alpha = 7.5 degrees, 15 degrees, and 30 degrees). A homogeneous model with uniform concentration of additives was assumed for property prediction. The results show that loading Graphene nanoparticles decreases the melting time by about 4.98% when alpha = 7.5 degrees, and the impact of phi improves by about 5.2% when the angle is reduced from 30 degrees to 7.5 degrees. Furthermore, as the angle decreases, the melting period decreases by approximately 76.47%, which is associated with an increase in driving force (conduction) in geometries with lower alpha.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
As'ad Alizadeh, Fateme Sabet Sarvestani, Hussein Zekri, Mohsin O. AL-Khafaji, Hayder Mahmood Salman, Davood Domiri Ganji, Pooya Pasha
Summary: A scientific definition for laminar boundary layer flow and heat transfer of an incompressible viscous flow over a stretching cylinder near the suction/injection area is provided in this study. The study uses numerical and analytical methods to convert the differential equations into dimensionless coupled equations. The analysis shows that the suction process increases surface firmness and quality, while the injection process decreases surface skin friction. The use of water fluid accelerates the heat transfer process from the surface to the outside of the boundary layer.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Bahram Jalili, Amirhossein Rezaeian, Payam Jalili, Fathollah Ommi, Davood Domiri Ganji
Summary: This study evaluates the heat transfer phenomena of a nanofluid stream through a microchannel heat sink under the influence of a magnetic field. Aluminum oxide-water nanofluid is used as the cooling fluid, and the Koo-Kleinstreuer model is applied to calculate the viscosity and thermal conductivity of the nanofluid. The porous medium is modeled using the improved Darcy relationship, and the dispersion type of the two-equation approach is used to simulate heat transfer between the solid and fluid zones. The results indicate that the magnetic field has a direct impact on the Nusselt number, and heat transfer increases with the concentration of the nanofluid, with the highest heat transfer achieved at a concentration of 0.04.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Mohsan Hassan, Muhammad Rizwan, M. M. Bhatti
Summary: This study investigates the performance and flow characteristics of nanofluids through experiments and numerical simulations. By establishing rheological mathematical models and integrating them into transport equations, the influence of nanoparticle volume fraction, base fluid properties, and temperature on the behavior of nanofluids is explored and explained.
Article
Materials Science, Multidisciplinary
S. Nadeem, Bushra Ishtiaq, Jehad Alzabut, Hassan A. Ghazwani, Ahmad M. Hassan
Summary: This study compares the time-dependent flow of a micropolar fluid between a linear stretching sheet and an exponential stretching sheet. It is found that the exponential stretching sheet provides more consequential results compared to the linear stretching sheet. Additionally, the material parameter shows an increase in the velocity field for both types of sheets.
RESULTS IN PHYSICS
(2023)
Review
Energy & Fuels
Zanwer Tahr, Jagar A. Ali, Ahmed Salih Mohammed
Summary: In recent years, there has been an increased interest in the use of nano and biodegradable materials in drilling fluid. Researchers have investigated the impact of these materials and found that rice husk and pomegranate peel powders significantly improve the rheological and filtration properties of drilling fluid. Additionally, nano-clay and titanium oxide have a significant impact on the properties of drilling fluid.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Duy-Khuong Ly, Ho-Nam Vu, Chanachai Thongchom, Nguyen-Thoi Trung
Summary: This paper presents a novel numerical approach for nonlinear analysis and smart damping control in laminated functionally graded carbon nanotube reinforced magneto-electro-elastic (FG-CNTMEE) plate structures, taking into account multiple physical fields. The approach employs a multi-physical coupling isogeometric formulation to accurately capture the nonlinear strain-displacement relationship and the magneto-electro-elastic coupling properties. The smart constrained layer damping treatment is applied to achieve nonlinear damped responses. The formulation is transformed into the Laplace domain and converted back to the time domain through inverse techniques for smart control using viscoelastic materials.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2024)
Article
Chemistry, Physical
Rajalaxmi Sahoo, C. Reshma, D. S. Shankar Rao, C. V. Yelamaggad, S. Krishna Prasad
Summary: This study investigates the influence of the flexible spacer parity of a guest photoactive liquid crystalline dimer on the photonic bandgap features of the cholesteric and twist grain boundary smectic C phases of the host molecule. The results show that the parity of the photoactive dimer affects the width of the photonic bandgap and the blue-shift of the cholesteric phase. Additionally, the parity of the dimer also affects the layer spacing and two-dimensional periodicity of the liquid crystalline phases.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Sara Rozas, Alberto Gutierrez, Mert Atilhan, Alfredo Bol, Santiago Aparicio
Summary: This study presents a multiscale theoretical investigation on the use of bifunctional hydrophobic Deep Eutectic Solvent for carbon capture using tetrapropylammonium chloride, acetic acid, and ethanolamine. The characterization includes nanoscale analysis of CO2 absorption mechanisms and changes in liquid phase properties during gas capture.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Tabouli Eric Da-yang, Alhadji Malloum, Jean Jules Fifen, Mama Nsangou, Jeanet Conradie
Summary: In this study, the potential energy of different glycine tautomers and their interaction with Cu2+ cations was investigated. The results showed that the solvation medium and the presence of Cu2+ cations influenced the stability of glycine tautomers.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Xiaoliang Gou, Nan Ye, Qingqing Han, Junjie Cui, Long Yi Jin
Summary: In this study, amphiphilic rod-coil molecules with rigid DSA parts and flexible oligoether chains were designed and their assembly capacities were investigated. The morphology of the molecular aggregates was influenced by the pH of the solution and UV light, and the aggregates showed adsorption capacity for nitroaromatic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Shuang Liu, Liyan Shan, Cong Qi, Wenhui Zhang, Guannan Li, Bei Wang, Wei Wei
Summary: Optimizing the design of styrene-butadiene-styrene copolymer (SBS) is crucial for producing cost-effective SBS modifiers and improving road quality. This study examined the influence of SBS content and molecular structure on viscosity and compatibility. The results showed that the viscosity contribution of SBS is determined by its molecular structure and phase morphology.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Artem A. Petrov, Ekaterina A. Titova, Aydar A. Akhmadiyarov, Ilnaz T. Rakipov, Boris N. Solomonov
Summary: This work focuses on the thermochemistry of solvation of azeotropes. The enthalpies of dissolution of azeotropes in different mediums were determined, and the impact of the structure of the azeotropes on their properties in solution was discussed. A correlation between enthalpies of solvation and molar refraction was used to determine the vaporization enthalpies of azeotropes for the first time. The results were found to be consistent with literature data, obtained using direct and calculated methods. These findings contribute to the analysis of the structure-property relationships of azeotropes.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
L. V. Kamaeva, E. N. Tsiok, N. M. Chtchelkatchev
Summary: Understanding the correlations between liquids and solids allows us to predict the thermodynamic parameter range favorable for the formation of intriguing solid phases by studying liquids. In this study, we experimentally and theoretically investigated an Al-Cu-Co system within different composition ranges, and identified high-temperature solid phases. Our findings demonstrated the correlation between the boundaries of different solid phases and undercooling and viscosity in the concentration area.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
R. Aneesh Kumar, S. Jamelah Al-Otaibi, Y. Sheena Mary, Y. Shyma Mary, Nivedita Acharjee, Renjith Thomas, Renjith Raveendran Pillai, T. L. Leena
Summary: In this study, the interactions between doped and pristine coronenes and adenine nucleobases were investigated using Density Functional Theory. The optimal configurations, adsorption energies, charge transfer, and electrical properties of each complex were calculated. It was found that doped coronene had stronger adsorption strength and charge transfer compared to pristine coronene. The stability of the complexes was attributed to non-covalent interactions in the interactive region. The change in electrical conductivity of coronenes after adsorption suggested their sensitivity towards DNA bases. The predicted energy gap and prolonged recovery time for adenine-coronene configurations indicated the potential application of pristine/doped coronene in DNA detection.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Gang Zhou, Yongwei Liu, Biao Sun, Zengxin Liu, Cuicui Xu, Rulin Liu, Qi Zhang, Yongmei Wang
Summary: The CFD-DEM method was used to simulate the dust deposition pattern in the bronchus of anchor digging drivers, revealing the highest dust concentration in the vortex region of the working face. The study also found a positive correlation between dust particle diameter and bronchial deposition rate, and a negative correlation with alveolar deposition rate.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Yan Zhang, Yafei Luo, Lingkai Tang, Mingyan E, Jianping Hu
Summary: This study investigates the effects of different transition metal decorations on B12N12 nanocages on the adsorption properties of nitrosourea drugs using computational methods. The results reveal the presence of weak non-covalent interactions between metals and nanocages, and the interaction between drugs and nanocages plays a significant role in drug adsorption. Compared to free drugs, the adsorption of drugs on nanocages can facilitate electron transfer, reduce energy gaps and chemical hardness, indicating activity at the target site.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
C. I. Alcolado, J. Poblete, L. Garcia-Rio, E. Jimenez, F. J. Poblete
Summary: In this study, the selective oxidation of aromatic aldehydes was investigated using Ru(VI) as a catalyst and hexacyanoferrate (III) as a cooxidant in an alkaline medium. The reaction mechanism involves complex reaction orders for the oxidant and the aromatic aldehyde, while the reaction order for Ru(VI) is one. The proposed mechanism includes two catalytic cycles and the formation and decomposition of complexes. Quantitative structure-activity relationship analysis showed that deactivating groups in the para-position enhance the process.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Inez A. Barbieri, Marcos L. S. Oliveira, Franciele S. Bruckmann, Theodoro R. Salles, Leonardo Zancanaro, Luis F. O. Silva, Guilherme L. Dotto, Eder C. Lima, Mu. Naushad, Cristiano R. Bohn Rhoden
Summary: This study evaluated the adsorption of zolpidem on magnetic graphene oxide and synthesized magnetic graphene oxide adsorbents for zolpidem removal. The best magnetic nanoadsorbent was found to have a removal percentage of 87.07% at specific pH and temperature conditions. The results suggest that the removal of zolpidem is related to the surface chemistry of the adsorbent rather than the surface area of graphene oxide. The adsorbent showed excellent adsorption efficiency and magnetic behavior, making it a promising material for removing zolpidem from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Hongyan Huang, Chunquan Li, Siyuan Huang, Yuling Shang
Summary: This study examines the sensitivity of the thermal conductivity of water-based alumina nanofluids to changes in concentration, sphericity, and temperature. The results show that volume fraction and temperature have a significant impact on the thermal conductivity, while sphericity also needs to be considered. A support vector machine regression model was created to analyze the sensitivity of the thermal conductivity to different parameters. The findings indicate that temperature, sphericity, and volume fraction are the most sensitive variables.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Correction
Chemistry, Physical
V. M. Pergamenshchik, T. Bryk, A. Trokhymchuk
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Chemistry, Physical
Valentyn Rudenko, Anatolii Tolochko, Svitlana Bugaychuk, Dmytro Zhulai, Gertruda Klimusheva, Galina Yaremchuk, Tatyana Mirnaya, Yuriy Garbovskiy
Summary: This paper reports on the synthesis, structural characterization, spectral and nonlinear-optical properties of glass nanocomposites made of glass forming ionic liquid crystals and nanoparticles. The study reveals that by exciting the nanocomposites within their absorption band, a control over effective optical nonlinearities can be achieved, allowing the modification of the magnitude and sign of the effective nonlinear absorption coefficient. The proposed strategy using metal-alkanoates based glass-forming ionic liquid crystals and nanoparticles shows great potential for the development of nanophotonics and plasmonics technologies.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
