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Ji Q, Li B, Kadic M, Wang C. Thermal conductivity of wrinkled graphene ring with defects. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:285704. [PMID: 38579746 DOI: 10.1088/1361-648x/ad3b59] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 04/05/2024] [Indexed: 04/07/2024]
Abstract
Graphene rings have great prospects in the fields of biological modulators, electrochemical biosensors, and resonators, but are prone to wrinkling which can affect their physical properties. This work establishes a theoretical model predicting the torsional wrinkling behavior of defective monolayer graphene rings, which provides direct understanding and reliable accuracy of the wrinkle levels. Then the thermal conductivity of wrinkled graphene rings is studied considering different wrinkle levels, defect concentrations and radii. It is found that with increased radius, defect concentration and torsional angle, the ratio of wrinkle amplitude to wavelength increases gradually. Vacancy defects and radii have more significant influences on the thermal conductivity than torsional wrinkles. The main influence mechanism of wrinkles and defects on thermal conductivity is revealed by phonon density of state. This work provides theoretical guidance for thermal manipulation based on the wrinkle-tuning approach.
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Affiliation(s)
- Qingxiang Ji
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, People's Republic of China
| | - Bohan Li
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, People's Republic of China
| | - Muamer Kadic
- Université de Franche-Comté, Institute FEMTO-ST, CNRS, Besançon 25000, France
| | - Changguo Wang
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, People's Republic of China
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Wu R, Tian H, Zhu Z, Liu Y, Xing CY, Zhang G, Ren TL. Macroscopic negative differential thermal resistance in the overlapping graphene homojunction structure. iScience 2023; 26:107493. [PMID: 37588166 PMCID: PMC10425946 DOI: 10.1016/j.isci.2023.107493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 06/15/2023] [Accepted: 07/22/2023] [Indexed: 08/18/2023] Open
Abstract
As one of the most potential ways to manipulate heat, thermal functional devices have achieved several breakthroughs in recent years, but are still limited to theoretical simulations. One of its theoretical bases is the existence of the negative differential thermal resistance (NDTR). However, most of the existing systems where the phenomenon of NDTR is found are atomic-level systems. In order to realize the macroscopic NDTR and provide effective theoretical guidance and support for the practical realization of thermal functional devices, we construct the overlapping graphene homojunction model, using the negative thermal expansion property of graphene to modify the overlapping area, and thus regulating the heat flow. The COMSOL-MATLAB co-simulation is used to perform calculations through negative feedback loops. It is found that the NDTR phenomenon exists under certain parameter conditions, which can provide new ideas and bring more opportunities for the experimental realization of nonlinear thermal functional devices.
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Affiliation(s)
- Rui Wu
- School of Integrated Circuit and the Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - He Tian
- School of Integrated Circuit and the Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
| | - Zhengqiang Zhu
- School of Integrated Circuit and the Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
- Beijing Institute of Aerospace Control Devices, Beijing 100094, China
| | - Yanming Liu
- School of Integrated Circuit and the Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
- Beijing Institute of Aerospace Control Devices, Beijing 100094, China
| | - Chao-Yang Xing
- Beijing Institute of Aerospace Control Devices, Beijing 100094, China
| | - Gang Zhang
- Institute of High Performance Computing, A∗STAR, Singapore 138632, Singapore
| | - Tian-Ling Ren
- School of Integrated Circuit and the Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
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SefidSiahbandi M, Moradi O, Akbari-Adergani B, Aberoomand Azar P, Sabar Tehrani M. The effect of Fe-Zn mole ratio (2:1) bimetallic nanoparticles supported by hydroxyethyl cellulose/graphene oxide for high-efficiency removal of doxycycline. ENVIRONMENTAL RESEARCH 2023; 218:114925. [PMID: 36462691 DOI: 10.1016/j.envres.2022.114925] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/28/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
In this research, Hydroxyethyl cellulose - graphene oxide HEC-GO and HEC-GO/Fe-Zn mole ratio (2:1) nanocomposite as adsorbents were fabricated by crosslinking ethylene glycol dimethacrylate (EGDMA) to study the thermodynamic, kinetic and isotherm of doxycycline antibiotic adsorption. The morphology and structure of the adsorbents were analyzed by Fourier transform infrared spectroscopy (FT-IR), Field Emission Scanning Electron Microscopy with Energy Dispersive X-Ray Spectroscopy (FE-SEM- EDX), and Transmission electron microscopy (TEM). The adsorption behavior of doxycycline (DOX) was studied with different parameters including doxycycline concentration, pH, the dose of adsorbent (HEC-GO and HEC-GO/Fe-Zn, mole ratio (2:1)), contact time, and temperature. The optimal conditions for the removal of DOX are pH = 3.0, contact time 100 min, and 20 min for HEC-GO and HEC-GO/Fe-Zn mole ratio (2:1). The removal percentage for HEC-GO and HEC-GO/Fe-Zn mole ratio (2:1) was 97% and 95.5%, respectively. Equilibrium adsorption isotherms such as the Langmuir, Freundlich, and Temkin models were analyzed according to the experimental data. Also, four adsorption kinetics were investigated for removing DOX. The Langmuir isotherm and pseudo-second-order kinetic models provided the best fit for experimental data for HEC-GO and HEC-GO/Fe-Zn mole ratio (2:1). Thermodynamic data showed that negative values of Gibbs free energy (ΔG°) and the negative value of enthalpy (ΔH°) of the adsorption process for adsorbents. It means that DOX removal was a spontaneous and exothermic reaction.
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Affiliation(s)
- Minoo SefidSiahbandi
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Omid Moradi
- Department of Chemistry, Faculty of Science, Shahr -e-Qods Branch, Islamic Azad University, Tehran, Iran.
| | - Behrouz Akbari-Adergani
- Water Safety Research Center, Food and Drug Administration, Ministry of Health and Medical Education, Tehran, Iran
| | - Parviz Aberoomand Azar
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mohammad Sabar Tehrani
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Dehnou KH, Norouzi GS, Majidipour M. A review: studying the effect of graphene nanoparticles on mechanical, physical and thermal properties of polylactic acid polymer. RSC Adv 2023; 13:3976-4006. [PMID: 36756574 PMCID: PMC9891084 DOI: 10.1039/d2ra07011a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/11/2023] [Indexed: 01/28/2023] Open
Abstract
Polylactic acid (PLA) is a linear aliphatic polyester thermoplastic made from renewable sources such as sugar beet and cornstarch. Methods of preparation of polylactic acid are biological and chemical. The advantages of polylactic acid are biocompatibility, easily processing, low energy loss, transparency, high strength, resistance to water and fat penetration and low consumption of carbon dioxide during production. However, polylactic acid has disadvantages such as hydrophobicity, fragility at room temperature, low thermal resistance, slow degradation rate, permeability to gases, lack of active groups and chemical neutrality. To overcome the limitations of PLA, such as low thermal stability and inability to absorb gases, nanoparticles such as graphene are added to improve its properties. Extensive research has been done on the introduction of graphene nanoparticles in PLA, and all of these studies have been studied. In this study, we intend to study a comprehensive study of the effect of graphene nanoparticles on the mechanical, thermal, structural and rheological properties of PLA/Gr nanocomposites and also the effect of UV rays on the mechanical properties of PLA/Gr nanocomposites.
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Affiliation(s)
- Kianoush Hatami Dehnou
- Department of Materials Science and Engineering, School of Engineering, Shiraz University Shiraz Iran
| | - Ghazal Saki Norouzi
- Chemical Engineering Department, Faculty of Engineering, Razi University Iran
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Mazinani A, Zare K, Moradi O, Attar H. Sulfonated calixarene modified Poly(methyl methacrylate) nanoparticles:A promising adsorbent for Removal of Vanadium Ions from aqueous media. CHEMOSPHERE 2022; 299:134459. [PMID: 35367226 DOI: 10.1016/j.chemosphere.2022.134459] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/21/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
The poly (methyl methacrylate) (PMMA)-based nanoparticle was synthesized by surfactant-free emulsion polymerization method and then post modified with Calixarene using (3-Aminopropyl)triethoxysilane organo-silane as a linker after OH-treatment. The prepared structure was applied for efficient adsorption of Vanadium ions in the aqueous solution after characterization by FT-IR, SEM, TEM, DLS, and EDX. Additional investigations discovered that the prepared adsorbent has a good capacity to adsorb vanadium ions. The effect of key experimental factors was studied to find the optimal point of adsorbent efficiency including the initial concentration of analyte, sorbent dosage, pH of the solution, contact time, and type/quantity of the eluents. It was specified, the maximum adsorption capacity for the synthesized nanoparticles was obtained about 322 mg g-1. The adsorption mechanism was revealed that the model of Langmuir isotherm well-matched compared to the others due to the calculated equilibrium data. Besides, the kinetics of the adsorption process was fitted with pseudo-second-order. Eventually, the prepared adsorbent was successfully applied in vanadium adsorption from real water media.
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Affiliation(s)
- Ali Mazinani
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Karim Zare
- Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Omid Moradi
- Department of Chemistry, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran.
| | - Hossein Attar
- Chemical Engineering Department, Engineering and Technology Faculty, Sciences and Research Branch, Islamic Azad University, Tehran, Iran
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Moradi O, Alizadeh H, Sedaghat S. Removal of pharmaceuticals (diclofenac and amoxicillin) by maltodextrin/reduced graphene and maltodextrin/reduced graphene/copper oxide nanocomposites. CHEMOSPHERE 2022; 299:134435. [PMID: 35358563 DOI: 10.1016/j.chemosphere.2022.134435] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/18/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Due to the scarcity of water and the growing industrialization, pharmaceutical wastewater treatment is of particular importance. For this reason, it is necessary to achieve an efficient method to eliminate all types of pharmaceutical pollutants. Herein, synthetic nano-composite is proposed to take a step towards improving the operation of removing pharmaceutical contaminants from the environment and aquatic and industrial effluents. Binary (maltodextrin/reconstituted graphene nanocomposite) and ternary (maltodextrin/reconstituted graphene nanocomposite/copper oxide) nanocomposites were prepared and characterized using, FT-IR, FESEM-EDS, TEM, DLS, and XRD. The nanocomposites were used to eliminate diclofenac and amoxicillin as Pharmaceuticals. The removal of amoxicillin at a concentration of 30 mg/L with an adsorbent dose of 0.05 g and a pH of 7.4 and an optimal temperature of 20 °C in 10 min has the highest removal rate of 86%. In addition, diclofenac with nano-adsorbents prepared under optimal conditions, including an initial concentration of 20 mg/L, adsorbent dose of 0.05 g, adsorption time of 7 min, a temperature of 20 °C and a pH of 7, has the highest removal efficiency of 94%. The results indicated that the prepared nanocomposites are alternative adsorbents to remove Pharmaceuticals from water.
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Affiliation(s)
- Omid Moradi
- Department of Chemistry, Faculty of Science, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran.
| | - Hamed Alizadeh
- Department of Chemistry, Faculty of Science, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
| | - Sajjad Sedaghat
- Department of Chemistry, Faculty of Science, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
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Li W, Tian W. Molecular Dynamics Analysis of Graphene Nanoelectromechanical Resonators Based on Vacancy Defects. NANOMATERIALS 2022; 12:nano12101722. [PMID: 35630944 PMCID: PMC9143645 DOI: 10.3390/nano12101722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/14/2022] [Accepted: 05/16/2022] [Indexed: 01/01/2023]
Abstract
Due to the limitation of graphene processing technology, the prepared graphene inevitably contains various defects. The defects will have a particular influence on the macroscopic characteristics of the graphene. In this paper, the defect-based graphene nanoresonators are studied. In this study, the resonant properties of graphene were investigated via molecular dynamic simulations. The effect of vacancy defects and hole defects at different positions, numbers, and concentrations on the resonance frequency of graphene nanoribbons was studied. The results indicated that single monatomic vacancy has no effect on graphene resonant frequency, and the concentration of the resonant frequency of graphene decreases almost linearly with the increase of single-atom vacancy concentration. When the vacancy concentration is 5%, the resonance frequency is reduced by 12.77% compared to the perfect graphene. Holes on the graphene cause the resonance frequency to decrease. As the circular hole defect is closer to the center of the graphene nanoribbon, not only does its resonant frequency increase, but the tuning range is also expanded accordingly. Under the external force of 10.715 nN, the resonant frequency of graphene reaches 429.57 GHz when the circular hole is located at the center of the graphene nanoribbon, which is 40 GHz lower than that of single vacancy defect graphene. When the circular hole is close to the fixed end of graphene, the resonant frequency is 379.62 GHz, which is 90 GHz lower than that of single vacancy graphene. When the hole defect is at the center of nanoribbon, the frequency tunable range of graphene reaches 120 GHz. The tunable frequency range of graphene is 100.12 GHz when the hole defect is near the fixed ends of the graphene nanoribbon. This work is of great significance for design and performance optimization of graphene-based nanoelectro-mechanical system (NEMS) resonators.
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Phyto-mediated synthesis of nanoparticles and their applications on hydrogen generation on NaBH 4, biological activities and photodegradation on azo dyes: Development of machine learning model. Food Chem Toxicol 2022; 163:112972. [PMID: 35398181 DOI: 10.1016/j.fct.2022.112972] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/22/2022] [Accepted: 03/26/2022] [Indexed: 12/12/2022]
Abstract
This work reports the synthesis of the silver-platinum bimetallic nanoparticles (N@Pt-Ag BNPs) reduced by an ethanolic extract of black seed (Nigella sativa, N) using the green synthesis method, these nanoparticles show a great antibacterial, anticancer, and catalytic activity. The characterization of physicochemical properties of Ag-Pt BNP was carried out using UV-visible spectroscopy (Uv-vis), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Transmission electron microscope (TEM) analysis. The structural morphology shows that the N@Pt-Ag BNPs are spherical particles with a diameter of 5.6 nm. The cytotoxic effects of N@Pt-Ag BNPs were examined by MTT test in human breast cancer, human colon cancer, human pancreatic cancer, L929-Murine fibroblast cells. N@Pt-Ag BNPs have been observed to be much more effective in breast cancer cell lines. The cytotoxic effect of N@Pt-Ag BNPs against healthy L929-murine fibroblast cell lines was not observed. Also, high antibacterial activity on each of the bacteria Escherichia coli (E. coli), Bacillus subtilis (B. subtilis), Methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus aureus (S. aureus), where we note that most strains of E. coli and S. aureus were damaged with a 73% percentage, 67% bacterial inhibition respectively. The results of the catalytic activities of N@Pt-Ag BNPs were obtained by performing the hydrolysis experiments of sodium borohydride (NaBH4). According to the results obtained, TOF, enthalpy, entropy, and activation energy, values were found to be 2497.14 h-1, 13.52 kJ/mol, -137.47 J/mol.K, 16.02 kJ/mol, respectively. N@Pt-Ag BNPs were found to be highly effective catalysts for hydrogen production which this was also confirmed by the machine learning model. The photocatalytic activity of N@Pt-Ag BNPs was tested against methylene blue (MB) dye and the highest activity was found as 80%.
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Karimi-Maleh H, Beitollahi H, Senthil Kumar P, Tajik S, Jahani PM, Karimi F, Karaman C, Vasseghian Y, Baghayeri M, Rouhi J, Show PL, Rajendran S, Fu L, Zare N. Recent advances in carbon nanomaterials-based electrochemical sensors for food azo dyes detection. Food Chem Toxicol 2022; 164:112961. [PMID: 35395340 DOI: 10.1016/j.fct.2022.112961] [Citation(s) in RCA: 142] [Impact Index Per Article: 71.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/17/2022] [Accepted: 03/22/2022] [Indexed: 01/24/2023]
Abstract
Azo dyes as widely applied food colorants are popular for their stability and affordability. On the other hand, many of these dyes can have harmful impacts on living organs, which underscores the need to control the content of this group of dyes in food. Among the various analytical approaches for detecting the azo dyes, special attention has been paid to electro-analytical techniques for reasons such as admirable sensitivity, excellent selectivity, reproducibility, miniaturization, green nature, low cost, less time to prepare and detect of specimens and the ability to modify the electrode. Satisfactory results have been obtained so far for carbon-based nanomaterials in the fabrication of electrochemical sensing systems in detecting the levels of these materials in various specimens. The purpose of this review article is to investigate carbon nanomaterial-supported techniques for electrochemical sensing systems on the analysis of azo dyes in food samples in terms of carbon nanomaterials used, like carbon nanotubes (CNT) and grapheme (Gr).
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Affiliation(s)
- Hassan Karimi-Maleh
- School of Resources and Environment, University of Electronic Science and Technology of China, P.O. Box 611731, Xiyuan Ave, Chengdu, PR China; Department of Chemical Engineering, Quchan University of Technology, Quchan, 9477177870, Iran.
| | - Hadi Beitollahi
- Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran.
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam, Chennai, 603110, India.
| | - Somayeh Tajik
- Research Center of Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman, Iran
| | | | - Fatemeh Karimi
- Department of Chemical Engineering, Quchan University of Technology, Quchan, 9477177870, Iran.
| | - Ceren Karaman
- Department of Electricity and Energy, Akdeniz University, Antalya, 07070, Turkey
| | - Yasser Vasseghian
- Department of Chemistry, Soongsil University, Seoul, 06978, South Korea
| | - Mehdi Baghayeri
- Department of Chemistry, Faculty of Science, Hakim Sabzevari University, P.O. Box 397, Sabzevar, Iran
| | - Jalal Rouhi
- Faculty of Physics, University of Tabriz, Tabriz, 51566, Iran
| | - Pau-Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih, 43500, Selangor Darul Ehsan, Malaysia
| | - Saravanan Rajendran
- Faculty of Engineering, Department of Mechanical Engineering, University of Tarapaca, 1775, Arica, Chile
| | - Li Fu
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, PR China
| | - Najmeh Zare
- Department of Chemical Engineering, Quchan University of Technology, Quchan, 9477177870, Iran
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