Article
Physics, Applied
Zilan Xiong, Renjie Huang, Yu Zhu, Kang Luo, Mengqi Li, Zhenping Zou, Rui Han
Summary: Despite the growing use of plasma treatment for onychomycosis, the mechanism of action remains unclear. Results suggest that long-lived gaseous species from plasma can effectively penetrate the nail plate and inhibit microorganism growth on the nail surface.
PLASMA PROCESSES AND POLYMERS
(2021)
Article
Physics, Applied
Alina Begley, Giovanni Luca Bartolomeo, Daniel F. Abbott, Victor Mougel, Renato Zenobi
Summary: In this study, nitrogen was doped into monolayer graphene using reactive nitrogen species from a dielectric barrier discharge (DBD). The treated graphene monolayer showed a moderate degree of damage and an increase in N-atom (pyrrolic) and O-atom (mixed) content after 30 seconds of treatment. However, longer treatment times led to radial expansion of the treated area and destruction of the graphene. The N-atom content increased with increasing operating voltage of the DBD source. When only neutral reactive nitrogen species were used, the N-atom content and type remained unchanged. Based on these findings, it is hypothesized that neutrals such as N(S-4) and possibly N(P-2) are the primary reactive species resulting in pyrrolic N-doping from the DBD.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Applied
Thomas von Woedtke, Guelsah Gabriel, Ulrich E. Schaible, Sander Bekeschus
Summary: The SARS-CoV-2 pandemic has highlighted the importance of effective hygiene and disinfection measures. The virus spreads efficiently through airborne transmission routes, releasing virus aerosols from the oral and nasopharyngeal cavities. In addition to the respiratory tract, viral replication has been found in the epithelium of these cavities. Plasma technology has emerged as a potential method to locally reduce viral loads and decrease patient infectivity, and we outline the conceptual ideas for such treatment in this review.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
Min Jeong Seong, Yun Jeong Ha, Gun Hyeon Park, Sun Ja Kim, Hea Min Joh, T. H. Chung
Summary: This article presents a dielectric-barrier-discharge-based square unipolar microsecond-pulsed helium atmospheric pressure plasma jet (APPJ). A simplified equivalent circuit model and transferred charge measurement were used to characterize the APPJ. The effects of operational parameters on the performance of the plasma jet and the properties of liquid media treated by the plasma were investigated, and the correlation between plasma characteristics and properties of plasma-treated liquid was discussed.
PHYSICS OF PLASMAS
(2023)
Article
Computer Science, Interdisciplinary Applications
Andrea Villa, Roger Schurch, Giacomo Buccella, Luca Barbieri, Christian Laurano, Roberto Malgesini, Daniele Palladini
Summary: Plasma simulation is becoming increasingly important in electrical engineering to replicate technically relevant configurations, such as the evolution of partial discharges. A proper numerical filter can address the challenges caused by high surface conductivity and greatly enhance the performance of simulation algorithms.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Engineering, Multidisciplinary
Andrea Villa, Luca Barbieri, Roberto Malgesini, Giacomo Buccella
Summary: This paper aims to simulate plasma-solid interaction in real insulating components using first-principle partial differential equations. A filtering method is applied to allow the use of larger time steps in simulating realistic components. The novel theoretical analysis shows that the filter does not affect the accuracy of the method, as supported by significant numerical experiments.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Computer Science, Interdisciplinary Applications
Andrea Villa, Roger Schurch, Luca Barbieri, Roberto Malgesini, Giacomo Buccella
Summary: The study of cold plasma is a highly active field of applied physics with a wide range of technical applications. Various models, including the local electric field approximation and the local mean energy approximation, have been considered. This research explores a new numerical scheme and tests its performance in different scenarios.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Physics, Applied
Gerardo Lopez-Echevarria, Guadalupe Mendez-Montealvo, Martin Nieto-Perez, Gonzalo Velazquez, Alberto Herrera-Gomez, Jorge Huerta-Ruelas
Summary: This study evaluates the effect of cold plasma treatment on corn starch, finding that longer treatment time leads to thicker films formed on the surface of starch granules, thereby improving their hydrophobicity. Changes in rheological properties are observed after only 5 minutes of treatment, with small effects detected at a molecular level. The proposed treatment is an eco-friendly method to obtain hydrophobic corn starch with no structural changes. The paste formation test showed a reduction of 48% of original viscosity for native starch.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Physics, Fluids & Plasmas
K. Rasek, F. X. Bronold, H. Fehske
Summary: This study investigates the self-consistent ambipolar charge kinetics across a negatively biased semiconducting plasma-solid interface. By calculating and visualizing, the study shows that the current-voltage characteristic is influenced by the electron microphysics of the semiconductor, indicating that the perfect absorber model commonly used for plasma-solid interfaces cannot be maintained for semiconducting interfaces.
Article
Engineering, Chemical
Namita Ojah, Susmita Thakur, Dolly Gogoi, Gazi Ameen Ahmed, Manabendra Mandal, Robin Doley, Arup Jyoti Choudhury
Summary: This study investigates the discharge characteristics of atmospheric dielectric barrier discharge (DBD) plasma and its effects on the surface functionalities of electrospun silk/PVA nanofibers. Results show that filamentary discharge is predominant at lower electrode gap, while reducing significantly at higher electrode gaps, with 6 mm electrode gap treatment resulting in improved physical and biological performance of the nanofibers.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2022)
Article
Polymer Science
Choncharoen Sawangrat, Parichat Thipchai, Kannikar Kaewapai, Kittisak Jantanasakulwong, Jonghwan Suhr, Pitiwat Wattanachai, Pornchai Rachtanapun
Summary: The effect of argon and oxygen gases, as well as treatment times, on the properties of modified bamboo fibers using DBD plasma were investigated. Plasma treatment with inert gases generated ions and radicals on the fiber surface. Different spectroscopy and microscopy techniques confirmed changes in chemical composition, crystallinity, and surface roughness. Mechanical properties of the fiber-reinforced epoxy composites showed different trends with different plasma treatments and treatment times.
Article
Engineering, Chemical
Aurelien Lepoetre, Stephanie Ognier, Mengxue Zhang, Julien Wengler, Safwan Al Ayoubi, Cyril Ollivier, Louis Fensterbank, Xavier Duten, Michael Tatoulian
Summary: A miniaturized flow device combining microfluidics technology and plasma process successfully synthesized cyclohexylamine with 50% selectivity and 20% molar conversion of cyclohexane. Numerical simulations confirmed the generation of NH2 radicals in the plasma, reacting with cyclohexyl radicals to achieve the reaction. Effects of voltage and frequency on selectivity and conversion rate were studied and discussed.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2021)
Article
Engineering, Environmental
Jingyi Zhao, Ai Zhang, Paul Heroux, Zhuyu Sun, Yanan Liu
Summary: The study found that under certain conditions, dielectric barrier discharges (DBD) can efficiently degrade diesel-fuel-polluted soil, potentially becoming an effective remediation method. The degradation efficiency of diesel fuel is affected by factors such as soil depth and moisture, with high concentrations of diesel fuel being effectively removed through the action of alkyl radicals.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Food Science & Technology
Gabriela N. Pereira, Karina Cesca, Anelise Leal Vieira Cubas, Debora de Oliveira
Summary: Non-thermal plasma technology has been extensively studied and applied as an environmentally friendly technique for the clean treatment of lignocellulosic materials. Compared to traditional chemical pre-treatments, non-thermal plasma technology can reduce environmental pollution effectively, and is expected to be an efficient pretreatment method for producing high value-added products from large quantities of residues in the future.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
Xu-Cheng Wang, Yuan-Tao Zhang
Summary: Non-thermal plasma technology is a promising solution for decomposing CO (2), and this study proposes a deep neural network (DNN) to describe the discharge characteristics and plasma chemistry of CO (2) pulsed discharge at atmospheric pressure. The DNN is trained using fluid model simulation data and shown to provide accurate results in a fraction of the time compared to traditional simulations. The DNN prediction results indicate the influence of pulse rise rate and plateau duration on discharge current, breakdown voltage, electric field, and product species density. Overall, this study demonstrates the reliability and potential of DNN-based methods in non-thermal plasma applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Environmental Sciences
Zahra Eshaghi Gorji, Abbas Ali Khodadadi, Siavash Riahi, Timo Repo, Yadollah Mortazavi, Marianna Kemell
Summary: In this study, a series of organic compounds were immobilized on N-doped graphene quantum dots to prepare a multifunctional organocatalyst for the coupling reaction between CO2 and propylene oxide. The proposed catalysts demonstrated high activity and yielded excellent results under optimal conditions.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Green & Sustainable Science & Technology
Alibakhsh Kasaeian, Hamed Hadavi, Yasaman Amirhaeri, Fathollah Pourfayaz
Summary: A novel integrated structure is proposed to simultaneously produce power and heat using biomass fuel. The integrated system consists of multiple sections including gasification, solid oxide fuel cell, gas turbine cycle, Rankine cycle, ORC, and hot air and water line. The system utilizes heat recovery to supply the required heat for gasification and air. Wood chips are used as fuel for the solid oxide fuel cell through gasification. The results show that the cycle has an output power of 152.8 MW, an electrical efficiency of 51.43%, and an overall efficiency of 81.13%.
Article
Energy & Fuels
Habib Shoeibi, Azad Jarrahian, Mehdi Mehrpooya, Ehsanolah Assaerh, Mohsen Izadi, Fathollah Pourfayaz
Summary: This study proposed a mathematical model based on heat transfer equations and simulated a CPC solar collector using Aspen HYSYS and MATLAB software. The simulated mathematical model includes a two-dimensional numerical model to describe the thermal and dynamic behavior of the fluid inside the CPC solar collector absorber tube. The numerical simulations showed a good correlation between the numerical results and experimental results.
Article
Thermodynamics
Mojtaba Lak Kamari, Akbar Maleki, Raheleh Daneshpour, Marc A. Rosen, Fathollah Pourfayaz, Mohammad Alhuyi Nazari
Summary: An innovative multigeneration system based on biomass is proposed in this study, which can generate useful outputs including district cooling and heating, bioethanol, biogas, and electricity. According to the results, cotton stem leads to the highest CO2 emission while switchgrass has the lowest. Rice straw and rice husk exhibit the highest and lowest overall energy efficiencies, respectively, while rice straw and larch wood have the highest and lowest overall exergy efficiencies, respectively.
Article
Chemistry, Physical
Pouria Pakzad, Mehdi Mehrpooya, Fathollah Pourfayaz, Mohammad Reza Ganjali
Summary: This study investigates the electrochemical performance of Ce-PGCN,NS/Co3O4 as a metal-free ORR electrocatalyst and supercapacitor electrode. Various tests including FESEM, TEM, BET, FTIR, XRD, EDX, and Raman were conducted to characterize the synthesized electrocatalysts. The results show that Ce-PGCN,NS/Co3O4 exhibits excellent electrochemical performance as an ORR electrocatalyst and supercapacitor electrode, making it a promising alternative to commercial Pt/C catalysts. The addition of Co3O4 nanorods and doping Cerium atoms positively impact the electrocatalytic activity of g-C3N4.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Yasaman Amirhaeri, Fathollah Pourfayaz, Hamed Hadavi, Alibakhsh Kasaeian
Summary: A novel hybrid system is introduced to provide electricity, cooling, and heating simultaneously for a town in Istanbul. Different parts of the system are evaluated using dynamic or steady-state methods based on meteorological information. The combination of the non-dominated sorting algorithm and multi-criteria decision-making is employed to optimize the operational parameters. The system achieves maximum energy and exergy efficiencies in September, October, and November, with the lowest exergy destruction rate. The COE and NPC of the system are obtained as 0.05147 $kW h(-1) and 579.3 M$, respectively.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Energy & Fuels
Arman Zendehnam, Fathollah Pourfayaz
Summary: A parametric study was conducted on a parallel double-effect LiBr-water absorption chiller using advanced exergy assessment. The study found that improving the performance of components can reduce the system's energy losses, and the impact of different operational parameters on system performance varies.
ENERGY SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Physical
Fatemeh Gashoul Daresibi, Abbas Ali Khodadadi, Yadollah Mortazavi
Summary: Ga2O3 was synthesized on a gamma-Al2O3 support using the atomic layer deposition method (ALD) for the CO2-oxidative dehydrogenation of propane (CO2-ODHP). The Ga loading was controlled by the number of ALD cycles, ranging from 1 to 2.9 wt%. The ALD catalysts exhibited higher activity and selectivity in the CO2-ODHP reaction compared to catalysts prepared with impregnation method, attributed to the higher surface total moderate acidity, Ga-O-Al linkages, and Ga2O3 dispersion. The ALD-3C catalyst, with 2.9% Ga loading, achieved 38% conversion and 82% selectivity to propylene after 120 minutes of CO2-ODHP reaction at 600 degrees Celsius, corresponding to a 96% improvement in propylene yield.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Hamide Mohammad Aliha, Abbas Ali Khodadadi, Yadollah Mortazavi, Mohammad Nader Lotfollahi
Summary: The aim of this study is to investigate a new method of fabricating SnO2/polyaniline (PAni) nanocomposite sensors for detecting ammonia at room temperature. The synthesis of PAni is conducted through oxidative polymerization, and SnO2/PAni hybrid nanocomposites with varying percentages of polymer are fabricated using a deposition-precipitation method in the presence of SnCl4 solution. XRD, BET, FTIR, Raman, TGA, and FESEM tests are carried out to characterize the produced powders. The results show that increasing the PAni content in the nanocomposites leads to a decrease in SnO2 crystallite size, an increase in surface area, and improved thermal stability. The SnO2/8 wt% PAni exhibits the highest sensitivity, with a response of approximately 187% for 100 ppm NH3 at room temperature. The optimal heteronucleation and decoration of SnO2 on the PAni surface enhance the sensor's response. Additionally, the sensor demonstrates selectivity in the presence of interfering gases such as CO, ethanol, methane, toluene, and trichloroethylene.
APPLIED SURFACE SCIENCE
(2023)
Article
Business
Mohammad Saleh Khodaparasti, Reza Khorasani, Omid Tavakoli, Abbas Ali Khodadadi
Summary: The effect of co-pyrolysis of municipal sewage sludge (MSS) and microalgae Chlorella Vulgaris (MCV) on pyrolysis products and synergistic effects was investigated. Changes in gas components at different temperatures and reaction times were analyzed using GC analysis. The co-pyrolysis bio-oil was found to be rich in fatty acids and amides compounds, providing a new direction for the high value-added utilization of biomass.
JOURNAL OF BUSINESS RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Hamed Hadavi, Amirali Saifoddin, Yasaman Amirhaeri, Fathollah Pourfayaz
Summary: This paper presents an innovative combined cooling, heating and power (CCHP) system based on biomass to address the challenges of fossil fuel depletion and global warming. The system utilizes various processes to efficiently recover waste heat and improve energy and exergy efficiencies. Thermodynamic, economic and sensitivity analyses are conducted, followed by an optimization approach to maximize energy and exergy efficiencies and minimize overall cost. The results show that the optimal solution increases electricity production and reduces cost and COE, making it a high-efficiency and economical option.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
S. Samaneh Bahrani, Abbas Ali Khodadadi, Yadolah Mortazavi
Summary: It has been found that selective deposition of NiO on MoOx/?-Al2O3 enhances the formation of active NiMoS catalytic phase, leading to improved hydrodesulfurization activity. Catalysts prepared by selective atomic layer deposition (S-ALD) showed higher desulfurization conversions at lower reaction temperatures and pressures compared to those prepared by impregnation. HR-TEM and XPS characterization revealed that the enhanced activity of S-ALD catalysts is attributed to the formation of more active NiMoS catalytic phase with higher sulfidability than their impregnation counterparts.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
Mojtaba Taheri, Fathollah Pourfayaz, Sara Hemmati
Summary: This study developed a model using artificial neural network (ANN) and response surface method (RSM) to predict the thermal conductivity of carbon-based nano-enhanced phase change materials (NEPCMs). The ANN model showed better predictive capacity than the RSM model.
Article
Energy & Fuels
Moslem Esfandiari, Fathollah Pourfayaz, Alibakhsh Kasaeian, Ali Gholami
Summary: This study investigated the effect of incorporating a solar absorption refrigeration system into a gas-steam combined cycle power plant. It found that high ambient temperatures have a detrimental impact on the power plant's performance and efficiency. The use of the SAR system to cool the compressor's input air resulted in increased power generation capacity and overall efficiency.
ENERGY SCIENCE & ENGINEERING
(2023)
