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Guo Z, Ye Z, Yin M, Dai S, Zhang X, Wang W, Liu Z. Growth of Low-Defect Nitrogen-Doped Graphene Film Using Condensation-Assisted Chemical Vapor Deposition Method. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1120. [PMID: 36770126 PMCID: PMC9921703 DOI: 10.3390/ma16031120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
It is significantly important to modulate the electrical properties of graphene films through doping for building desired electronic devices. One of the effective doping methods is the chemical vapor deposition (CVD) of graphene films with heteroatom doping during the process, but this usually results in nitrogen-doped graphene with low doping levels, high defect density, and low carrier mobility. In this work, we developed a novel condensation-assisted CVD method for the synthesis of high-quality nitrogen-doped graphene (NG) films at low temperatures of 400 °C using solid 3,4,5-trichloropyridine as a carbon and nitrogen source. The condensation system was employed to reduce the volatilization of the solid source during the non-growth stage, which leads to a great improvement of quality of as-prepared NG films. Compared to the one synthesized using conventional CVD methods, the NG films synthesized using condensation-assisted CVD present extremely low defects with a ratio of from D- to G-peak intensity (ID/IG) in the Raman spectrum lower than 0.35. The corresponding total N content, graphitic nitrogen/total nitrogen ratio, and carrier mobility reach 3.2 at%, 67%, and 727 cm2V-1S-1, respectively. This improved condensation-assisted CVD method provides a facile and well-controlled approach for fabricating high-quality NG films, which would be very useful for building electronic devices with high electrical performance.
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Affiliation(s)
- Zhichao Guo
- School of Information Science and Engineering, Ningbo University, Ningbo 315201, China
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Zhenya Ye
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
- Nano Science and Technology Institute, University of Science and Technology of China, Hefei 230026, China
| | - Mengqing Yin
- School of Information Science and Engineering, Ningbo University, Ningbo 315201, China
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Shixun Dai
- School of Information Science and Engineering, Ningbo University, Ningbo 315201, China
| | - Xiaohui Zhang
- CRRC Industrial Academy Co., Ltd., Beijing 100039, China
| | - Wei Wang
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Zhaoping Liu
- Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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Effect of the Dopant Configuration on the Electronic Transport Properties of Nitrogen-Doped Carbon Nanotubes. NANOMATERIALS 2022; 12:nano12020199. [PMID: 35055218 PMCID: PMC8779956 DOI: 10.3390/nano12020199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/03/2022] [Accepted: 01/05/2022] [Indexed: 01/26/2023]
Abstract
Nitrogen-doped carbon nanotubes (N-CNTs) show promise in several applications related to catalysis and electrochemistry. In particular, N-CNTs with a single nitrogen dopant in the unit cell have been extensively studied computationally, but the structure-property correlations between the relative positions of several nitrogen dopants and the electronic transport properties of N-CNTs have not been systematically investigated with accurate hybrid density functional methods. We use hybrid density functional theory and semiclassical Boltzmann transport theory to systematically investigate the effect of different substitutional nitrogen doping configurations on the electrical conductivity of N-CNTs. Our results indicate significant variation in the electrical conductivity and the relative energies of the different dopant configurations. The findings can be utilized in the optimization of electrical transport properties of N-CNTs.
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Mohebbi E, Seyyed Fakhrabadi MM. Electronic, optical, mechanical, and thermal properties of diphenylacetylene-based graphyne nanosheet using density functional theory. NANOTECHNOLOGY 2021; 32:405705. [PMID: 34157684 DOI: 10.1088/1361-6528/ac0d81] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/21/2021] [Indexed: 06/13/2023]
Abstract
In this paper, the structural stability, electronic, optical, mechanical, and thermal properties of diphenylacetylene-based graphyne (DPAG) nanosheet are investigated using first-principle calculations based on density functional theory (DFT). The absolute value of the calculated cohesive energy reveals that DPAG nanosheet is a structurally stable two-dimensional material. Also, in the results of phononic dispersion curves, the absence of imaginary frequencies confirms the dynamic stability of this novel material. In addition, the theoretical electronic band structure and density of states reveal the semiconducting nature of DPAG nanosheet. The optical analysis shows that the first absorption peaks of the imaginary and real parts of dielectric constants along the in-plane and out-of-plane polarizations of DPAG monolayer occur in the visible range of the electromagnetic spectrum. On the other hand, the DPAG nanosheet exhibits orthotropic elastic behavior with four independent constants comparable with the data of similar materials available in the literature. Moreover, DFT calculations of the lattice thermal conductivity of DPAG reveals an anomalously very low thermal conductivity of this nanosheet showing its perfect thermal non-conductivity. Our results provide deep insights into the potential applications of DPAG nanosheet for the design of new optoelectronic/nanoelectronic devices.
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Affiliation(s)
- Elaheh Mohebbi
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Mir Masoud Seyyed Fakhrabadi
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
- Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, Delft, 2628 CD, The Netherlands
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Ghiasi R, Ahraminejad M, Mohtat B. The application of graphyne and its boron nitride analogue in Li-ion batteries. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ai L, Chang C, Liu Y, Ebrahimiasl S. A quantum mechanical study on the application of inorganic BC2N nanotubes in the Na-ion batteries. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.107886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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The influence of Stone-Wales defects in nanographene on the performance of Na-ion batteries. J Mol Graph Model 2020; 98:107578. [PMID: 32200276 DOI: 10.1016/j.jmgm.2020.107578] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/29/2020] [Accepted: 03/03/2020] [Indexed: 11/23/2022]
Abstract
The effect of the Stone-Wales (SW) defect on the energetic, structural, electronic properties of Na/Na+ adsorption on the Hexa-peri-hexabenzocoronene (HBC) nanographene is investigated using density functional theory calculations. We showed that two kinds of SW defects can be generated in the structure of HBC, and the defected sheets are less stable than the intrinsic HBC by about 63.2-65.3 kcal/mol. The heptagonal ring of SW defect is the most favorable site for the Na and Na+ adsorption and the adsorption energies increase from -0.8 and -33.2 kcal/mol on the intrinsic HBC to -16.7 and -39.3 kcal/mol on the SW-HBC, respectively. The predicted energy barrier for an Na atom to move from a heptagonal ring to another one in the SW-HBC is about 4.9 kcal/mol, indicating a high ion mobility compared to the pristine HBC. The SW defect increases the Na diffusion coefficient from 3.46 × 10-11 to 2.83 × 10-6 cm2/s. Although the SW defect increases the ion mobility, it has an undesirable effect on the cell voltage, if a HBC nanographene is used in the anode of Na-ion batteries.
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A computational study on the BN-yne sheet application in the Na-ion batteries. J Mol Graph Model 2020; 97:107567. [PMID: 32062582 DOI: 10.1016/j.jmgm.2020.107567] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 11/23/2022]
Abstract
Although Li-ion batteries are extensively applied, short lifetime, high cost, and safety problems limit their application. Na-ion batteries (NIB) might be an alternative to the Li-ion owing to wide availability, low cost, and nontoxicity of Na. Here, we performed density functional theory calculations to investigate the possible application of a graphyne-like BN layer (BN-yne) in the anode of NIBs. The adsorption energies of Na and Na+ on the BN-yne are predicted to be -15.3 and -54.6 kcal/mol, respectively. It was found that the maximum barrier energy for migration of Na atom and Na+ ion through BN-yne surface is about 20.2 and 16.5 kcal/mol, respectively. The calculated cell voltage for the BN-yne are predicted to be and 1.70 V. Using an electric field of -0.02 a. u. much more strengthens the interaction of Na+ with the BN-yne compared to the Na atom, increasing the cell voltage of NIB to 2.10 eV. We showed that a high Na storage capacity (Na4B2N2), high cell voltage and diffusion ability of BN-yne make it a promising candidate for the NIB anode material.
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Lin W, Liang SD, He C, Xie W, He H, Mai Q, Li J, Yao DX. Stabilities and novel electronic structures of three carbon nitride bilayers. Sci Rep 2019; 9:1025. [PMID: 30705289 PMCID: PMC6355783 DOI: 10.1038/s41598-018-37100-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 11/23/2018] [Indexed: 11/08/2022] Open
Abstract
We predict three novel phases of the carbon nitride (CN) bilayer, denoted α-C2N2, β-C2N2 and γ-C4N4, respectively. All of them consist of two CN sheets connected by C-C covalent bonds. The phonon dispersions reveal that all these phases are dynamically stable, because no imaginary frequency is present. The transition pathway between α-C2N2 and β-C2N2 is investigated, which involves bond-breaking and bond-reforming between C and N. This conversion is difficult, since the activation energy barrier is 1.90 eV per unit cell, high enough to prevent the transformation at room temperature. Electronic structure calculations show that all three phases are semiconductors with indirect band gaps of 3.76/5.22 eV, 4.23/5.75 eV and 2.06/3.53 eV, respectively, by PBE/HSE calculation. The β-C2N2 has the widest band gap among the three phases. All three bilayers can become metallic under tensile strain, and the indirect gap of γ-C4N4 can turn into a direct one. γ-C4N4 can become an anisotropic Dirac semimetal under uniaxial tensile strain. Anisotropic Dirac cones with high Fermi velocity of the order of 105 m/s appear under 12% strain. Our results suggest that the three two-dimensional materials have potential applications in electronics, semiconductors, optics and spintronics.
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Affiliation(s)
- Wanxing Lin
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, P. R. China
| | - Shi-Dong Liang
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, P. R. China
| | - Chunshan He
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, P. R. China
| | - Wucheng Xie
- School of Environment and Chemical Engineering, Foshan University, Foshan, P. R. China
| | - Haiying He
- School of Materials Science and Energy Engineering, Foshan University, Foshan, P. R. China
| | - Quanxiang Mai
- School of Environment and Chemical Engineering, Foshan University, Foshan, P. R. China
| | - Jiesen Li
- School of Environment and Chemical Engineering, Foshan University, Foshan, P. R. China.
| | - Dao-Xin Yao
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-Sen University, Guangzhou, P. R. China.
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Gao K, Wang Y, Wei X, Qiang L, Zhang B, Zhang J. Hydrogenated amorphous carbon films with different nanostructure: A comparative study. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2018.11.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ahmadaghaei N, Noei M, Mohammadinasab E. Potential application of AlN nanostructures in sodium ion batteries: a DFT study. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1512725] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | - Maziar Noei
- Department of Chemistry, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
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13
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The effect of electric field on the cell voltage of inorganic AlN nanosheet based Na–ion batteries. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.03.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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14
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Wang Y, Gao K, Wang Q, Zhang J. The correlation between nano-hardness and elasticity and fullerene-like clusters in hydrogenated amorphous carbon films. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Dong Y, Gahl MT, Zhang C, Lin J. Computational study of precision nitrogen doping on graphene nanoribbon edges. NANOTECHNOLOGY 2017; 28:505602. [PMID: 29087366 DOI: 10.1088/1361-6528/aa9727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nitrogen doping in graphene is important for applications spanning from electronics to metal-free electrocatalysts. Despite much experimental study, limited theoretic work has been done in understanding the mechanism of the doping process, especially from a precision perspective. Herein, we present a computational study on precision nitrogen doping on edges of graphene nanoribbons (GNRs) by combining molecular dynamics (MD) simulation at a time scale of 40 ns and density function theory (DFT) calculation. In the MD study both ammonia and acetonitrile were used as nitrogen sources. MD results revealed that the ammonia produces almost all amine-type dopants, while the acetonitrile produces a considerable amount of pyrrolic and pyridinic nitrogen dopants which are beneficial to electronics and electrocatalysts. Results also show that the concentration of pyrrolic and pyridinic dopants can be precisely controlled by the edge geometries of the GNRs. Furthermore, DFT calculation illustrated the reaction mechanism in these different types of the GNRs when using acetonitrile as the nitrogen source. The calculated energies in different reaction stages indicate the stability of dopants on various GNRs, agreeing well with the MD results. The disclosed mechanism of controllable nitrogen doping on the edges of the GNRs would provide guidance to experimental realization, paving new routes to widespread applications.
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Affiliation(s)
- Yuan Dong
- Department of Mechanical & Aerospace Engineering, University of Missouri, Columbia, Missouri 65211, United States of America
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Qiao L, Jin Z. Two B-C-O Compounds: Structural, Mechanical Anisotropy and Electronic Properties under Pressure. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E1413. [PMID: 29232934 PMCID: PMC5744348 DOI: 10.3390/ma10121413] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 11/16/2017] [Accepted: 12/08/2017] [Indexed: 11/16/2022]
Abstract
The structural, stability, mechanical, elastic anisotropy and electronic properties of two ternary light element compounds, B₂CO₂ and B₆C₂O₅, are systematically investigated. The elastic constants and phonon calculations reveal that B₂CO₂ and B₆C₂O₅ are both mechanically and dynamically stable at ambient pressure, and they can stably exist to a pressure of 20 GPa. Additionally, it is found that B₂CO₂ and B₆C₂O₅ are wide-gap semiconductor materials with indirect energy gaps of 5.66 and 5.24 eV, respectively. The hardness calculations using the Lyakhov-Oganov model show that B₂CO₂ is a potential superhard material. Furthermore, the hardness of B₆C₂O₅ is 29.6 GPa, which is relatively softer and more easily machinable compared to the B₂CO₂ (41.7 GPa). The elastic anisotropy results show that B₆C₂O₅ exhibits a greater anisotropy in the shear modulus, while B₂CO₂ exhibits a greater anisotropy in Young's modulus at ambient pressure.
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Affiliation(s)
- Liping Qiao
- Team of Micro & Nano Sensor Technology and Application in High-altitude Regions, Xizang Engineering Laboratory for Water Pollution Control and Ecological Remediation, School of Information Engineering, Xizang Minzu University, Xianyang 712082, China.
| | - Zhao Jin
- School of Information Engineering, Chang'an University, Xi'an 710064, China.
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Onsori S, Liyaghati-Delshad M. The effects of different Minnesota functionals on the sensitivity of boron nitride nanocluster to nitrogen dioxide. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.05.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Vessally E, Behmagham F, Massuomi B, Hosseinian A, Nejati K. Selective detection of cyanogen halides by BN nanocluster: a DFT study. J Mol Model 2017; 23:138. [PMID: 28357691 PMCID: PMC5371637 DOI: 10.1007/s00894-017-3312-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/06/2017] [Indexed: 11/25/2022]
Abstract
The electronic sensitivity and adsorption behavior toward cyanogen halides (X–CN; X = F, Cl, and Br) of a B12N12 nanocluster were investigated by means of density functional theory calculations. The X-head of these molecules was predicted to interact weakly with the BN cluster because of the positive σ-hole on the electronic potential surface of halogens. The X–CN molecules interact somewhat strongly with the boron atoms of the cluster via the N-head, which is accompanied by a large charge transfer from the X–CN to the cluster. The change in enthalpy upon the adsorption process (at room temperature and 1 atm) is about −19.2, −23.4, and −30.5 kJ mol−1 for X = F, Cl, and Br, respectively. The LUMO level of the BN cluster is largely stabilized after the adsorption process, and the HOMO–LUMO gap is significantly decreased. Thus, the electrical conductivity of the cluster is increased, and an electrical signal is generated that can help to detect these molecules. By increasing the atomic number of X, the signal will increase, which makes the sensor selective for cyanogen halides. Also, it was indicated that the B12N12 nanocluster benefits from a short recovery time as a sensor.
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Affiliation(s)
- E Vessally
- Department of Chemistry, Payame Noor University, Tehran, Iran.
| | - F Behmagham
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - B Massuomi
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - A Hosseinian
- Department of Engineering Science, College of Engineering, University of Tehran, PO Box 11365-4563, Tehran, Iran
| | - K Nejati
- Department of Chemistry, Payame Noor University, Tehran, Iran.
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Nejati K, Hosseinian A, Bekhradnia A, Vessally E, Edjlali L. Na-ion batteries based on the inorganic BN nanocluster anodes: DFT studies. J Mol Graph Model 2017; 74:1-7. [PMID: 28324756 DOI: 10.1016/j.jmgm.2017.03.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 02/10/2017] [Accepted: 03/03/2017] [Indexed: 01/16/2023]
Abstract
It has been recently indicated that the Li-ion batteries may be replaced by Na-ion batteries because of their low safety, high cost, and low-temperature performance, and lack of the Li mineral reserves. Here, using density functional theory calculations, we studied the potential application of B12N12 nanoclusters as anode in Na-ion batteries. Our calculations indicate that the adsorption energy of Na+ and Na are about -23.4 and -1.4kcal/mol, respectively, and the pristine BN cage to improve suffers from a low cell voltage (∼0.92V) as an anode in Na-ion batteries. We presented a strategy to increase the cell voltage and performance of Na-ion batteries. We showed that encapsulation of different halides (X=F-, Cl-, or Br-) into BN cage significantly increases the cell voltage. By increasing the atomic number of X, the Gibbs free energy change of cell becomes more negative and the cell voltage is increased up to 3.93V. The results are discussed based on the structural, energetic, frontier molecular orbital, charge transfer and electronic properties and compared with the performance of other nanostructured anodes.
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Affiliation(s)
- K Nejati
- Department of Chemistry, Payame Noor University, Tehran, Iran.
| | - A Hosseinian
- Department of Engineering Science, College of Engineering, University of Tehran, P.O. Box 11365-4563, Tehran, Iran
| | - A Bekhradnia
- Pharmaceutical Sciences Research Center, Department of Medicinal Chemistry, Mazandaran University of Medical Sciences, Sari, Iran
| | - E Vessally
- Department of Chemistry, Payame Noor University, Tehran, Iran.
| | - L Edjlali
- Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran
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20
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Bondarchuk SV, Minaev BF. Two isomeric solid carbon nitrides with 1 : 1 stoichiometry which exhibit strong mechanical anisotropy. NEW J CHEM 2017. [DOI: 10.1039/c7nj00316a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two isomeric layered carbon nitride polymorphs are characterized using reliable theoretical methods. The NCNC phase, which is predicted for the first time, has a number of differences with the isomeric NCCN polymorph in its electronic, spectral and mechanical properties.
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Affiliation(s)
- Sergey V. Bondarchuk
- Department of Chemistry and Nanomaterials Science
- Bogdan Khmelnitsky Cherkasy National University
- 18031 Cherkasy
- Ukraine
| | - Boris F. Minaev
- Department of Chemistry and Nanomaterials Science
- Bogdan Khmelnitsky Cherkasy National University
- 18031 Cherkasy
- Ukraine
- Division of Theoretical Chemistry and Biology
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21
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Bond topography and nanostructure of hydrogenated fullerene-like carbon films: A comparative study. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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22
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Two Novel C₃N₄ Phases: Structural, Mechanical and Electronic Properties. MATERIALS 2016; 9:ma9060427. [PMID: 28773550 PMCID: PMC5456798 DOI: 10.3390/ma9060427] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 05/20/2016] [Accepted: 05/24/2016] [Indexed: 11/17/2022]
Abstract
We systematically studied the physical properties of a novel superhard (t-C3N4) and a novel hard (m-C3N4) C3N4 allotrope. Detailed theoretical studies of the structural properties, elastic properties, density of states, and mechanical properties of these two C3N4 phases were carried out using first-principles calculations. The calculated elastic constants and the hardness revealed that t-C3N4 is ultra-incompressible and superhard, with a high bulk modulus of 375 GPa and a high hardness of 80 GPa. m-C3N4 and t-C3N4 both exhibit large anisotropy with respect to Poisson’s ratio, shear modulus, and Young’s modulus. Moreover, m-C3N4 is a quasi-direct-bandgap semiconductor, with a band gap of 4.522 eV, and t-C3N4 is also a quasi-direct-band-gap semiconductor, with a band gap of 4.210 eV, with the HSE06 functional.
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Guan J, Liu D, Zhu Z, Tománek D. Two-Dimensional Phosphorus Carbide: Competition between sp(2) and sp(3) Bonding. NANO LETTERS 2016; 16:3247-3252. [PMID: 27088819 DOI: 10.1021/acs.nanolett.6b00767] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We propose previously unknown allotropes of phosphorus carbide (PC) in the stable shape of an atomically thin layer. Different stable geometries, which result from the competition between sp(2) bonding found in graphitic C and sp(3) bonding found in black P, may be mapped onto 2D tiling patterns that simplify categorizing of the structures. Depending on the category, we identify 2D-PC structures that can be metallic, semimetallic with an anisotropic Dirac cone, or direct-gap semiconductors with their gap tunable by in-layer strain.
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Affiliation(s)
- Jie Guan
- Physics and Astronomy Department, Michigan State University , East Lansing, Michigan 48824, United States
| | - Dan Liu
- Physics and Astronomy Department, Michigan State University , East Lansing, Michigan 48824, United States
| | - Zhen Zhu
- Physics and Astronomy Department, Michigan State University , East Lansing, Michigan 48824, United States
- Materials Department, University of California , Santa Barbara, California 93106, United States
| | - David Tománek
- Physics and Astronomy Department, Michigan State University , East Lansing, Michigan 48824, United States
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dos Santos RB, Rivelino R, de B. Mota F, Gueorguiev GK. Exploring Hydrogenation and Fluorination in Curved 2D Carbon Systems: A Density Functional Theory Study on Corannulene. J Phys Chem A 2012; 116:9080-7. [DOI: 10.1021/jp3049636] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renato B. dos Santos
- Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador,
Bahia, Brazil
| | - Roberto Rivelino
- Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador,
Bahia, Brazil
| | - Fernando de B. Mota
- Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador,
Bahia, Brazil
| | - Gueorgui K. Gueorguiev
- Department
of Physics, Chemistry,
and Biology, IFM, Linköping University, SE-58183 Linköping, Sweden
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Gueorguiev G, Goyenola C, Schmidt S, Hultman L. CF : A first-principles study of structural patterns arising during synthetic growth. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.09.045] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Gueorguiev G, Broitman E, Furlan A, Stafström S, Hultman L. Dangling bond energetics in carbon nitride and phosphorus carbide thin films with fullerene-like and amorphous structure. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.09.083] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gueorguiev G, Furlan A, Högberg H, Stafström S, Hultman L. First-principles calculations on the structural evolution of solid fullerene-like CPx. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.05.087] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Gueorguiev G, Neidhardt J, Stafström S, Hultman L. First-principles calculations on the curvature evolution and cross-linkage in carbon nitride. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.04.114] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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