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Zhang W, Zhang G, Ma J, Xie Z, Gao Z, Yu K, Peng L. The Role of Transition Metal Versus Coordination Mode in Single-Atom Catalyst for Electrocatalytic Sulfur Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38830270 DOI: 10.1021/acsami.4c01811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
Electrocatalytic sulfur reduction reaction (SRR) is emerging as an effective strategy to combat the polysulfide shuttling effect, which remains a critical factor impeding the practical application of the Li-S battery. Single-atom catalyst (SAC), one of the most studied catalytic materials, has shown considerable potential in addressing the polysulfide shuttling effect in a Li-S battery. However, the role played by transition metal vs coordination mode in electrocatalytic SRR is trial-and-error, and the general understanding that guides the synthesis of the specific SAC with desired property remains elusive. Herein, we use first-principles calculations and machine learning to screen a comprehensive data set of graphene-based SACs with different transition metals, heteroatom doping, and coordination modes. The results reveal that the type of transition metal plays the decisive role in SAC for electrocatalytic SRR, rather than the coordination mode. Specifically, the 3d transition metals exhibit admirable electrocatalytic SRR activity for all of the coordination modes. Compared with the reported N3C1 and N4 coordinated graphene-based SACs covering 3d, 4d, and 5d transition metals, the proposed para-MnO2C2 and para-FeN2C2 possess significant advantages on the electrocatalytic SRR, including a considerably low overpotential down to 1 mV and reduced Li2S decomposition energy barrier, both suggesting an accelerated conversion process among the polysulfides. This study may clarify some understanding of the role played by transition metal vs coordination mode for SAC materials with specific structure and desired catalytic properties toward electrocatalytic SRR and beyond.
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Affiliation(s)
- Wentao Zhang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Gaoshang Zhang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Jiabin Ma
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zhaotian Xie
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Ziyao Gao
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Kuang Yu
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Lele Peng
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, P. R. China
- School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China
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2
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Lu N, Hu X, Jiang J, Guo H, Zuo GZ, Zhuo Z, Wu X, Zeng XC. Highly anisotropic and ultra-diffusive vacancies in α-antimonene. NANOSCALE 2023; 15:4821-4829. [PMID: 36794788 DOI: 10.1039/d3nr00194f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
α-Antimonene has recently been successfully fabricated in experiment; hence, it is timely to examine how various types of point defects in α-antimonene can affect its novel electronic properties. Herein, we present a comprehensive investigation of a total of nine possible types of point defects in α-antimonene via first-principles calculations. Particular attention is placed on the structural stability of the point defects and the effects of point defects on the electronic properties of α-antimonene. Compared with its structural analogs, such as phosphorene, graphene, and silicene, we find that most defects in α-antimonene can be more easily generated, and that among the nine types of point defects, the single vacancy SV-(5|9) is likely the most stable one while its presence can be orders of magnitude higher in concentration than that in phosphorene. Moreover, we find that the vacancy exhibits anisotropic and low diffusion barriers, of merely 0.10/0.30 eV in the zigzag/armchair direction. Notably, at room temperature, the migration of SV-(5|9) in the zigzag direction of α-antimonene is estimated to be three orders faster than that along the armchair direction, and also three orders faster than that of phosphorene in the same direction. Overall, the point defects in α-antimonene can significantly affect the electronic properties of the host two-dimensional (2D) semiconductor and thus the light absorption capability. The anisotropic, ultra-diffusive, and charge tunable single vacancies, along with the high oxidation resistance, render the α-antimonene sheet a unique 2D semiconductor (beyond the phosphorene) for developing vacancy-enabled nanoelectronics.
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Affiliation(s)
- Ning Lu
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000, China.
| | - Xin Hu
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000, China.
| | - Jiaxin Jiang
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000, China.
| | - Hongyan Guo
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000, China.
| | - Gui Zhong Zuo
- Institute of Plasma Physics, HIPS, Chinese Academy of Sciences, Hefei, 230031, China
| | - Zhiwen Zhuo
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Key Laboratory of Functional Molecular Solids Ministry of Education, Anhui Laboratory of Molecule-Based Materials, and Department of Physics, Anhui Normal University, Wuhu, Anhui, 241000, China.
| | - Xiaojun Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, and School of Chemistry and Materials Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiao Cheng Zeng
- Department of Materials Science & Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong.
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Tong L, Zhang B, Zhang Y, Peng Z, Fu X. Edge engineering on layered WS 2 toward the electrocatalytic reduction of CO 2: a first principles study. Phys Chem Chem Phys 2022; 24:30027-30034. [PMID: 36472373 DOI: 10.1039/d2cp03499a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Transition-metal dichalcogenides (TMDCs) have been modified to show excellent electrocatalytic performance for the CO2 reduction reaction (CO2RR). However, little research has been reported on the edge modification of WS2 and its electrocatalytic CO2RR. In this work, the edge structure of WS2 with W atoms exposed in the top layer was established by density functional theory calculations. Through using WS2-xTM-y (x = 1, 2 or 3; y = 1 or 2; TM = Zn, Fe, Co or Ni) models by doping TM atoms on the top layer of WS2, the effects of dopant species, doping concentration and adsorption sites on their electrocatalytic activity were investigated. Among the models, the active site for the CO2RR is the W atoms. The doping of TM atoms would affect the bond strength between W and S atoms. After the doping of TM atoms in WS2-2TM-1 ones, the electrical conduction of S atoms and the underlying W atoms can greatly be improved. Thus the catalytic activities can be significantly increased, in which the WS2-2Zn-1 model shows the best catalytic activity. The limiting potential (UL) of the CO2RR to CO on the WS2-2Zn-1 model is -0.51 V and the Gibbs energy change (ΔG) for the adsorption of intermediates on the WS2-2Zn-1 model is ΔG(COOH*) = -0.37 and ΔG(CO*) = -0.51 eV, respectively. Solvation correction showed that WS2-2Zn-1 could maintain good catalytic performance in a wide range of pH values. The present results may provide a theoretical basis for the design and synthesis of novel electrocatalysts with high performance for the CO2RR.
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Affiliation(s)
- Likai Tong
- State Key Laboratory of Information Photonics and Optical Communications, and School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China.
| | - Bo Zhang
- State Key Laboratory of Information Photonics and Optical Communications, and School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China.
| | - Yu Zhang
- State Key Laboratory of Information Photonics and Optical Communications, and School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China.
| | - Zhijian Peng
- School of Science, China University of Geosciences, Beijing 100083, P. R. China
| | - Xiuli Fu
- State Key Laboratory of Information Photonics and Optical Communications, and School of Integrated Circuits, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China.
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4
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Zhai W, Wang M, Liu S, Xu S, Dong H, Wang L, Wei S, Wang Z, Liu S, Lu X. Theoretical investigation on two-dimensional conjugated aromatic polymer membranes for high-efficiency hydrogen separation: The effects of pore size and interaction. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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5
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Yuan Z, He G, Li SX, Misra RP, Strano MS, Blankschtein D. Gas Separations using Nanoporous Atomically Thin Membranes: Recent Theoretical, Simulation, and Experimental Advances. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2201472. [PMID: 35389537 DOI: 10.1002/adma.202201472] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/15/2022] [Indexed: 06/14/2023]
Abstract
Porous graphene and other atomically thin 2D materials are regarded as highly promising membrane materials for high-performance gas separations due to their atomic thickness, large-scale synthesizability, excellent mechanical strength, and chemical stability. When these atomically thin materials contain a high areal density of gas-sieving nanoscale pores, they can exhibit both high gas permeances and high selectivities, which is beneficial for reducing the cost of gas-separation processes. Here, recent modeling and experimental advances in nanoporous atomically thin membranes for gas separations is discussed. The major challenges involved, including controlling pore size distributions, scaling up the membrane area, and matching theory with experimental results, are also highlighted. Finally, important future directions are proposed for real gas-separation applications of nanoporous atomically thin membranes.
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Affiliation(s)
- Zhe Yuan
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Guangwei He
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Sylvia Xin Li
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Rahul Prasanna Misra
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Daniel Blankschtein
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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6
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Wang J, Li Y, Yang Y, Li Y, Zhao M, Li W, Guan J, Qu Y. Efficient Helium Separation with Two-Dimensional Metal-Organic Framework Fe/Ni-PTC: A Theoretical Study. MEMBRANES 2021; 11:membranes11120927. [PMID: 34940428 PMCID: PMC8708020 DOI: 10.3390/membranes11120927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/19/2021] [Accepted: 11/23/2021] [Indexed: 11/16/2022]
Abstract
Helium (He) is one of the indispensable and rare strategic materials for national defense and high-tech industries. However, daunting challenges have to be overcome for the supply shortage of He resources. Benefitted from the wide pore size distribution, sufficient intrinsic porosity, and high specific surface area, metal–organic framework (MOF) materials are prospective candidates for He purification in the membrane-based separation technology. In this work, through first-principles calculations and molecular dynamics (MD) simulations, we studied the permeability and filtration performance of He by the newly synthesized two-dimensional Fe-PTC MOF and its analogue Ni-PTC MOF. We found that both Fe-PTC and Ni-PTC have superior high performance for He separation. The selectivity of He over N2 was calculated to be ~1017 for Fe-PTC and ~1015 for Ni-PTC, respectively, both higher than most of the previously proposed 2D porous membranes. Meanwhile, high He permeance (10−4~10−3 mol s−1 m−2 Pa−1) can be obtained for the Fe/Ni-PTC MOF for temperatures ranging from 200 to 500 K. Therefore, the present study offers a highly prospective membrane for He separation, which has great potential in industrial application.
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Affiliation(s)
- Jingyuan Wang
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
| | - Yixiang Li
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
| | - Yanmei Yang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China;
| | - Yongqiang Li
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
| | - Mingwen Zhao
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
| | - Weifeng Li
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
| | - Jing Guan
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
- Correspondence: (J.G.); (Y.Q.)
| | - Yuanyuan Qu
- School of Physics, Shandong University, Jinan 250100, China; (J.W.); (Y.L.); (Y.L.); (M.Z.); (W.L.)
- Correspondence: (J.G.); (Y.Q.)
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7
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Li M, Wang L, Lei H, Yang Y, Li Y, Zhao M, Guan J, Li W, Qu Y. Efficient Helium and Helium Isotopes Separation by Phosphorus Carbide P
2
C
3
Membrane. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Min Li
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Lu Wang
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Huixia Lei
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Yanmei Yang
- College of Chemistry, Chemical Engineering and Materials Science Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities, of Shandong Key Laboratory of Molecular and Nano Probes, Ministry of Education Shandong Normal University Jinan 250014 China
| | - Yong‐Qiang Li
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Mingwen Zhao
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Jing Guan
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Weifeng Li
- School of Physics Shandong University Jinan Shandong 250100 China
| | - Yuanyuan Qu
- School of Physics Shandong University Jinan Shandong 250100 China
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8
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Liu Z, Zhao G, Zhang X, Gao L, Chen J, Sun W, Zhou G, Lu G. Superior performance porous carbon nitride nanosheets for helium separation from natural gas: Insights from MD and DFT simulations. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2021.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Lin S, Xu M, Qu Z, Liang Y, Li Y, Cui W, Shi J, Zeng Q, Hao J, Li Y. Hidden porous boron nitride as a high-efficiency membrane for hydrogen purification. Phys Chem Chem Phys 2020; 22:22778-22784. [PMID: 33021288 DOI: 10.1039/d0cp03785k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Nanoporous atom-thick two-dimensional materials with uniform pore size distribution and excellent mechanical strength have been considered as the ideal membranes for hydrogen purification. Here, our first-principles structure search has unravelled four porous boron nitride monolayers (m-BN, t-BN, h'-BN and h''-BN) that are metastable relative to h-BN. Especially, h'-BN consisting of B6N6 rings exhibits outstanding selectivity and permeability for hydrogen purification, higher than those of common membranes. Importantly, h'-BN possesses the mechanical strength to sustain a stress of 48 GPa, which is two orders of magnitude higher than that (0.38 GPa) of a recently reported graphene-nanomesh/single-walled carbon nanotube network hybrid membrane. The excellent selectivity, permeability and mechanical strength make h'-BN an ideal candidate for hydrogen purification.
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Affiliation(s)
- Shuyi Lin
- Laboratory of Quantum Materials Design and Application, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.
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10
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Chen Z, Wang H, Li Z. First-principles study of two dimensional C 3N and its derivatives. RSC Adv 2020; 10:33469-33474. [PMID: 35515052 PMCID: PMC9056723 DOI: 10.1039/d0ra06534j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 08/30/2020] [Indexed: 11/21/2022] Open
Abstract
Here we have performed a comprehensive first-principles study for electronic and mechanical properties of newly synthesized C3N and its derivatives. The C3N monolayer is evaluated to be an indirect semiconductor with a HSE06 level bandgap of 1.09 eV, which can be effectively tuned by the number of layers, stacking order and B-doping concentration. With strong polar covalent bonds, C3N is predicted to be a superior stiff material with high in-plane Young's modulus (1090.0 GPa) and thermal dynamic stability (up to 2000 K). Remarkably, the C3N monolayer possesses a fascinating bending Poisson's effect, namely, bending induced lateral contraction, which is rare in other 2D materials. What's more, C3N nanosheets can be rolled into nanotubes with a tunable bandgap corresponding to the radius of curvature. Due to high stability, suitable band gap and superior mechanical strength, two dimensional C3N will be an ideal candidate in high-strength nano-electronic device applications.
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Affiliation(s)
- Zhao Chen
- School of Electronic Science and Applied Physics, Hefei University of Technology Hefei Anhui 230009 China
| | - Haidi Wang
- School of Electronic Science and Applied Physics, Hefei University of Technology Hefei Anhui 230009 China
| | - ZhongJun Li
- School of Electronic Science and Applied Physics, Hefei University of Technology Hefei Anhui 230009 China
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11
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Hanf MC, Marjaoui A, Stephan R, Zanouni M, Diani M, Sonnet P. Undulated silicene and germanene freestanding layers: why not? JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:195503. [PMID: 31931489 DOI: 10.1088/1361-648x/ab6ae8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Silicene and germanene freestanding layers are usually described as a honeycomb lattice formed by two hexagonal sub-lattices presenting a height difference, namely the layer buckling. In this work, first-principles calculations show that silicene and germanene can be rippled at 0 K with various wavelengths, without any compressive strain of the layer. For germanene, the height difference between two Ge atoms from the same sub-lattice can be as high as 4.7 [Formula: see text] for an undulation length of 81 [Formula: see text]. The deformations are related to slight (lower than 1.7°) bond angle modifications, and the energy cost is remarkably low, lying between 0.1 and 0.8 meV per atom. These undulations modify the electronic structure, opening a gap of 15 meV.
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Affiliation(s)
- M-C Hanf
- Université de Haute Alsace, CNRS, IS2M UMR7361,68100 Mulhouse, France. Université de Strasbourg, France
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12
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Hu S, Yong Y, Li C, Zhao Z, Jia H, Kuang Y. Si 2BN monolayers as promising candidates for hydrogen storage. Phys Chem Chem Phys 2020; 22:13563-13568. [PMID: 32510545 DOI: 10.1039/d0cp00943a] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen storage properties of the pure Si2BN monolayer were studied using density functional theory calculations. The interaction of H2 molecules with the Si2BN monolayer is weak and of electrostatic nature. The average hydrogen adsorption energies are within the ideal range of practical applications (0.187-0.214 eV), and the consecutive adsorption energies indicate that the spontaneous adsorption of H2 molecules on the Si2BN monolayer can occur. The hydrogen gravimetric density of the periodic Si2BN monolayer reaches 8.5 wt%, which exceeds the standard of 6.0 wt% set by the US Department of Energy (DOE) by the year 2020. The estimated desorption temperatures show the desirable properties for the long term recycling of the Si2BN storage medium. Thus, our results show that the Si2BN monolayer is a promising candidate for molecular hydrogen storage.
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Affiliation(s)
- Song Hu
- School of Physics and Engineering, Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, China.
| | - Yongliang Yong
- School of Physics and Engineering, Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, China.
| | - Caitao Li
- School of Physics and Engineering, Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, China.
| | - Zijia Zhao
- School of Physics and Engineering, Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, China.
| | - Huiwen Jia
- School of Physics and Engineering, Henan Key Laboratory of Photoelectric Energy Storage Materials and Applications, Henan University of Science and Technology, Luoyang 471023, China.
| | - Yanmin Kuang
- Institute of Photobiophysics, School of Physics and Electronics, Henan University, Kaifeng 475004, China
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Wang L, Li F, Wang J, Li Y, Li W, Yang Y, Zhao M, Qu Y. High-efficiency helium separation through an inorganic graphenylene membrane: a theoretical study. Phys Chem Chem Phys 2020; 22:9789-9795. [DOI: 10.1039/d0cp00154f] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Appropriate interactions between an IGP membrane and He molecules result in efficient helium separation.
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Affiliation(s)
- Lu Wang
- School of Physics
- Shandong University
- Jinan
- China
| | - Feng Li
- School of Physics and Technology
- University of Jinan
- Jinan
- China
| | - Junru Wang
- School of Physics
- Shandong University
- Jinan
- China
| | - Yixiang Li
- School of Physics
- Shandong University
- Jinan
- China
| | - Weifeng Li
- School of Physics
- Shandong University
- Jinan
- China
| | - Yanmei Yang
- College of Chemistry, Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes, Ministry of Education
- Shandong Normal University
- Jinan
| | | | - Yuanyuan Qu
- School of Physics
- Shandong University
- Jinan
- China
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14
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Dabsamut K, T-Thienprasert J, Jungthawan S, Boonchun A. Stacking stability of C 2N bilayer nanosheet. Sci Rep 2019; 9:6861. [PMID: 31048761 PMCID: PMC6497902 DOI: 10.1038/s41598-019-43363-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 04/23/2019] [Indexed: 11/09/2022] Open
Abstract
In recent years, a 2D graphene-like sheet: monolayer C2N was synthesized via a simple wet-chemical reaction. Here, we studied the stability and electronic properties of bilayer C2N. According to a previous study, a bilayer may exist in one of three highly symmetric stacking configurations, namely as AA, AB and AB′-stacking. For the AA-stacking, the top layer is directly stacked on the bottom layer. Furthermore, AB- and AB′-stacking can be obtained by shifting the top layer of AA-stacking by a/3-b/3 along zigzag direction and by a/2 along armchair direction, respectively, where a and b are translation vectors of the unit cell. By using first-principles calculations, we calculated the stability of AA, AB and AB′-stacking C2N and their electronic band structure. We found that the AB-stacking is the most favorable structure and has the highest band gap, which appeared to agree with previous study. Nevertheless, we furthermore examine the energy landscape and translation sliding barriers between stacking layers. From energy profiles, we interestingly found that the most stable positions are shifted from the high symmetry AB-stacking. In electronic band structure details, band characteristic can be modified according to the shift. The interlayer shear mode close to local minimum point was determined to be roughly 2.02 × 1012 rad/s.
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Affiliation(s)
- Klichchupong Dabsamut
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand.,Thailand Center of Excellence in Physics, Commission on the Higher Education, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand
| | - Jiraroj T-Thienprasert
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand.,Thailand Center of Excellence in Physics, Commission on the Higher Education, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand
| | - Sirichok Jungthawan
- Thailand Center of Excellence in Physics, Commission on the Higher Education, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand.,School of Physics, Institute of Science, and Center of Excellence in Advanced Functional Materials, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| | - Adisak Boonchun
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand. .,Thailand Center of Excellence in Physics, Commission on the Higher Education, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand.
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15
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Moon DK, Han YJ, Bang G, Kim JH, Lee CH. Palladium-copper membrane modules for hydrogen separation at elevated temperature and pressure. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0237-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Kristoffersen HH, Chang JH. Effect of Competitive Adsorption at the Interface between Aqueous Electrolyte and Solid Electrode. ACS SYMPOSIUM SERIES 2019. [DOI: 10.1021/bk-2019-1331.ch010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Jin Hyun Chang
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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17
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Gifford BJ. Functionalized Carbon Nanotube Excited States and Optical Properties. ACS SYMPOSIUM SERIES 2019. [DOI: 10.1021/bk-2019-1331.ch008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Brendan J. Gifford
- Center for Nonlinear Studies, Theoretical Division, and Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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18
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Chang X, Zhu L, Xue Q, Li X, Guo T, Li X, Ma M. Charge controlled switchable CO2/N2 separation for g-C10N9 membrane: Insights from molecular dynamics simulations. J CO2 UTIL 2018. [DOI: 10.1016/j.jcou.2018.05.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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19
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Yang N, Yang D, Zhang G, Chen L, Liu D, Cai M, Fan X. The Effects of Graphene Stacking on the Performance of Methane Sensor: A First-Principles Study on the Adsorption, Band Gap and Doping of Graphene. SENSORS 2018; 18:s18020422. [PMID: 29389860 PMCID: PMC5855439 DOI: 10.3390/s18020422] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 01/16/2018] [Accepted: 01/25/2018] [Indexed: 01/29/2023]
Abstract
The effects of graphene stacking are investigated by comparing the results of methane adsorption energy, electronic performance, and the doping feasibility of five dopants (i.e., B, N, Al, Si, and P) via first-principles theory. Both zigzag and armchair graphenes are considered. It is found that the zigzag graphene with Bernal stacking has the largest adsorption energy on methane, while the armchair graphene with Order stacking is opposite. In addition, both the Order and Bernal stacked graphenes possess a positive linear relationship between adsorption energy and layer number. Furthermore, they always have larger adsorption energy in zigzag graphene. For electronic properties, the results show that the stacking effects on band gap are significant, but it does not cause big changes to band structure and density of states. In the comparison of distance, the average interlamellar spacing of the Order stacked graphene is the largest. Moreover, the adsorption effect is the result of the interactions between graphene and methane combined with the change of graphene's structure. Lastly, the armchair graphene with Order stacking possesses the lowest formation energy in these five dopants. It could be the best choice for doping to improve the methane adsorption.
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Affiliation(s)
- Ning Yang
- The Faculty of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
| | - Daoguo Yang
- The Faculty of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
| | - Guoqi Zhang
- The Faculty of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
- EEMCS Faculty, Delft University of Technology, 2628 Delft, The Netherlands.
| | - Liangbiao Chen
- The Department of Mechanical Engineering, Lamar University, Beaumont, TX 77706, USA.
| | - Dongjing Liu
- The Faculty of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
| | - Miao Cai
- The Faculty of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
| | - Xuejun Fan
- The Department of Mechanical Engineering, Lamar University, Beaumont, TX 77706, USA.
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20
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Fabris GSL, Marana NL, Longo E, Sambrano JR. Porous silicene and silicon graphenylene-like surfaces: a DFT study. Theor Chem Acc 2018. [DOI: 10.1007/s00214-017-2188-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Bian A, Dai Y, Yang J. Porous germanene as a highly efficient gas separation membrane. NANOSCALE 2017; 9:17505-17512. [PMID: 29110006 DOI: 10.1039/c7nr05805e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Using a gas separation membrane as a simple gas separation device has an obvious advantage because of the low energy consumption and pollution-free manufacturing. The first-principles calculations used in this work show that germanene with its divacancy is an excellent material for use as a hydrogen (H2) and helium (He) separation membrane, and that it displays an even better competitive advantage than porous graphene and porous silicene. Porous germanene with its divacancy is chemically inert to gas molecules, because it lacks additional atoms to protect the edged dangling germanium atoms in defects, and thus shows great advantages for gas separation over previously prepared graphene. The energy barriers to H2 and He penetrating porous germanene are quite low, and the permeabilities to H2 and He are high. Furthermore, the selectivities of porous germanene for H2 and He relative to other gas molecules are high, up to 1031 and 1027, respectively, which are superior to those of porous graphene (1023) and porous silicene (1013); thus the separation efficiency of porous germanene is much higher than that of porous graphene and porous silicene. Therefore, germanene is a favorable candidate as a gas separation membrane material. At the same time, the successful synthesis of germanene in the laboratory means that it is possible to use it in real applications.
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Affiliation(s)
- Ang Bian
- School of Physical Science & Technology and Jiangsu Key Laboratory for NSLSCS, Nanjing Normal University, Nanjing 210023, China.
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22
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Zhang Y, Meng Z, Shi Q, Gao H, Liu Y, Wang Y, Rao D, Deng K, Lu R. Nanoporous MoS 2 monolayer as a promising membrane for purifying hydrogen and enriching methane. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:375201. [PMID: 28675145 DOI: 10.1088/1361-648x/aa7d5e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present a theoretical prediction of a highly efficient membrane for hydrogen purification and natural gas upgrading, i.e. laminar MoS2 material with triangular sulfur-edged nanopores. We calculated from first principles the diffusion barriers of H2 and CO2 across monolayer MoS2 to be, respectively, 0.07 eV and 0.17 eV, which are low enough to warrant their great permeability. The permeance values for H2 and CO2 far exceed the industrially accepted standard. Meanwhile, such a porous MoS2 membrane shows excellent selectivity in terms of H2/CO, H2/N2, H2/CH4, and CO2/CH4 separation (>103, > 103, > 106, and > 104, respectively) at room temperature. We expect that the findings in this work will expedite theoretical or experimental exploration on gas separation membranes based on transition metal dichalcogenides.
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Affiliation(s)
- Yadong Zhang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China
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23
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Walia GK, Randhawa DKK. Electronic and transport properties of silicene-based ammonia nanosensors: an ab initio study. Struct Chem 2017. [DOI: 10.1007/s11224-017-1025-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Wang L, Boutilier MSH, Kidambi PR, Jang D, Hadjiconstantinou NG, Karnik R. Fundamental transport mechanisms, fabrication and potential applications of nanoporous atomically thin membranes. NATURE NANOTECHNOLOGY 2017; 12:509-522. [PMID: 28584292 DOI: 10.1038/nnano.2017.72] [Citation(s) in RCA: 369] [Impact Index Per Article: 52.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 03/20/2017] [Indexed: 05/22/2023]
Abstract
Graphene and other two-dimensional materials offer a new approach to controlling mass transport at the nanoscale. These materials can sustain nanoscale pores in their rigid lattices and due to their minimum possible material thickness, high mechanical strength and chemical robustness, they could be used to address persistent challenges in membrane separations. Here we discuss theoretical and experimental developments in the emerging field of nanoporous atomically thin membranes, focusing on the fundamental mechanisms of gas- and liquid-phase transport, membrane fabrication techniques and advances towards practical application. We highlight potential functional characteristics of the membranes and discuss applications where they are expected to offer advantages. Finally, we outline the major scientific questions and technological challenges that need to be addressed to bridge the gap from theoretical simulations and proof-of-concept experiments to real-world applications.
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Affiliation(s)
- Luda Wang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Michael S H Boutilier
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Piran R Kidambi
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Doojoon Jang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Nicolas G Hadjiconstantinou
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
| | - Rohit Karnik
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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25
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Hu W, Lin L, Banerjee AS, Vecharynski E, Yang C. Adaptively Compressed Exchange Operator for Large-Scale Hybrid Density Functional Calculations with Applications to the Adsorption of Water on Silicene. J Chem Theory Comput 2017; 13:1188-1198. [PMID: 28177229 DOI: 10.1021/acs.jctc.6b01184] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional theory (DFT) calculations using hybrid exchange-correlation functionals have been shown to provide an accurate description of the electronic structures of nanosystems. However, such calculations are often limited to small system sizes due to the high computational cost associated with the construction and application of the Hartree-Fock (HF) exchange operator. In this paper, we demonstrate that the recently developed adaptively compressed exchange (ACE) operator formulation [J. Chem. Theory Comput. 2016, 12, 2242-2249] can enable hybrid functional DFT calculations for nanosystems with thousands of atoms. The cost of constructing the ACE operator is the same as that of applying the exchange operator to the occupied orbitals once, while the cost of applying the Hamiltonian operator with a hybrid functional (after construction of the ACE operator) is only marginally higher than that associated with applying a Hamiltonian constructed from local and semilocal exchange-correlation functionals. Therefore, this new development significantly lowers the computational barrier for using hybrid functionals in large-scale DFT calculations. We demonstrate that a parallel planewave implementation of this method can be used to compute the ground-state electronic structure of a 1000-atom bulk silicon system in less than 30 wall clock minutes and that this method scales beyond 8000 computational cores for a bulk silicon system containing about 4000 atoms. The efficiency of the present methodology in treating large systems enables us to investigate adsorption properties of water molecules on Ag-supported two-dimensional silicene. Our computational results show that water monomer, dimer, and trimer configurations exhibit distinct adsorption behaviors on silicene. In particular, the presence of additional water molecules in the dimer and trimer configurations induces a transition from physisorption to chemisorption, followed by dissociation on Ag-supported silicene. This is caused by the enhanced effect of hydrogen bonds on charge transfer and proton transfer processes. Such a hydrogen bond autocatalytic effect is expected to have broad applications for silicene as an efficient surface catalyst for oxygen reduction reactions and water dissociation.
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Affiliation(s)
- Wei Hu
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Lin Lin
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.,Department of Mathematics, University of California , Berkeley, California 94720, United States
| | - Amartya S Banerjee
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Eugene Vecharynski
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Chao Yang
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
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26
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Zhu L, Chang X, He D, Xue Q, Li X, Jin Y, Zheng H, Ling C. Defective germanene as a high-efficiency helium separation membrane: a first-principles study. NANOTECHNOLOGY 2017; 28:135703. [PMID: 28248644 DOI: 10.1088/1361-6528/aa5fae] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Development of low energy cost membranes for separating helium from natural gas is highly desired. Using van der Waals-corrected first-principles density functional theory (DFT) calculations, we theoretically investigate the helium separation performance of divacancy-defective germanene. The 555 777 divacancy-defective germanene presents a 0.53 eV energy barrier for helium, which is slightly larger than the energy threshold value of gas molecule penetration of a membrane (0.5 eV). Thus, the 555 777 divacancy-defective germanene is difficult for helium to permeate, except under high temperature or pressure. However, the 585 divacancy-defective germanene presents a surmountable energy barrier (0.27 eV) for helium, and it shows extremely high helium selectivities relative to other studied gas molecules. Especially, the He/Ne selectivity can be as high as 1 × 104 at room temperature. Together with the acceptable permeance for helium, the 585 divacancy-defective germanene can be used for helium separation with remarkably good performance.
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Affiliation(s)
- Lei Zhu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, Shandong, People's Republic of China. College of Science, China University of Petroleum, Qingdao 266580, Shandong, People's Republic of China
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27
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Qu Y, Li F, Zhao M. Efficient 3He/4He separation in a nanoporous graphenylene membrane. Phys Chem Chem Phys 2017; 19:21522-21526. [DOI: 10.1039/c7cp03422a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient helium isotope separation by tunneling through a nanoporous graphenylene membrane.
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Affiliation(s)
- Yuanyuan Qu
- School of Physics
- Shandong University
- Jinan 250100
- China
| | - Feng Li
- School of Physics
- Shandong University
- Jinan 250100
- China
- School of Physics and Technology
| | - Mingwen Zhao
- School of Physics
- Shandong University
- Jinan 250100
- China
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28
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Chowdhury S, Jana D. A theoretical review on electronic, magnetic and optical properties of silicene. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2016; 79:126501. [PMID: 27753431 DOI: 10.1088/0034-4885/79/12/126501] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Inspired by the success of graphene, various two dimensional (2D) structures in free standing (FS) (hypothetical) form and on different substrates have been proposed recently. Silicene, a silicon counterpart of graphene, is predicted to possess massless Dirac fermions and to exhibit an experimentally accessible quantum spin Hall effect. Since the effective spin-orbit interaction is quite significant compared to graphene, buckling in silicene opens a gap of 1.55 meV at the Dirac point. This band gap can be further tailored by applying in plane stress, an external electric field, chemical functionalization and defects. In this topical theoretical review, we would like to explore the electronic, magnetic and optical properties, including Raman spectroscopy of various important derivatives of monolayer and bilayer silicene (BLS) with different adatoms (doping). The magnetic properties can be tailored by chemical functionalization, such as hydrogenation and introducing vacancy into the pristine planar silicene. Apart from some universal features of optical absorption present in all these 2D materials, the study on reflectivity modulation with doping (Al and P) concentration in silicene has indicated the emergence of some strong peaks having the robust characteristic of a doped reflective surface for both polarizations of the electromagnetic (EM) field. Besides this, attempts will be made to understand the electronic properties of silicene from some simple tight-binding Hamiltonian. We also point out the importance of shape dependence and optical anisotropy properties in silicene nanodisks and establish that a zigzag trigonal possesses the maximum magnetic moment. We also suggest future directions to be explored to make the synthesis of silicene and its various derivatives viable for verification of theoretical predictions. Although this is a fairly new route, the results obtained so far from experimental and theoretical studies in understanding silicene have shown enough significant promising features to open a new direction in the silicon industry, silicon based nano-structures in spintronics and in opto-electronic devices.
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Affiliation(s)
- Suman Chowdhury
- Department of Physics, University of Calcutta, 92, Acharya Prafulla Chandra Road, Kolkata 700009, India
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29
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Zhang C, Sun Q. A Honeycomb BeN2 Sheet with a Desirable Direct Band Gap and High Carrier Mobility. J Phys Chem Lett 2016; 7:2664-2670. [PMID: 27338078 DOI: 10.1021/acs.jpclett.6b01291] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Using global particle-swarm optimization method, we report, for the first time, a BeN2 sheet (h-BeN2) with a graphene-like honeycomb lattice but displaying a direct band gap. Symmetry group analysis indicates that the dipole transition is allowed between the conduction band minimum and the valence band maximum. Although the direct band gap of 2.23 eV is close to that (2.14 eV) of MoS2 sheet, the h-BeN2 sheet has additional advantages: the direct band gap feature of the h-BeN2 sheet is quite insensitive to the layer stacking pattern and layer number, in contrast to the well-known direct-to-indirect band gap transition observed in TMDs and h-BN sheets. When rolled up, all the resulting h-BeN2 nanotubes have direct band gaps independent of chirality and diameter. Furthermore, the intrinsic acoustic-phonon-limited carrier mobility of the h-BeN2 sheet can reach ∼10(5) cm(2) V(-1) s(-1) for electron and ∼10(4) cm(2) V(-1) s(-1) for hole, which are higher than that of MoS2 and black phosphorus.
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Affiliation(s)
- Cunzhi Zhang
- Department of Materials Science and Engineering, COE, Peking University , Beijing 100871, China
| | - Qiang Sun
- Department of Materials Science and Engineering, COE, Peking University , Beijing 100871, China
- Center for Applied Physics and Technology, Peking University , Beijing 100871, China
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30
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Wang Y, Li J, Yang Q, Zhong C. Two-Dimensional Covalent Triazine Framework Membrane for Helium Separation and Hydrogen Purification. ACS APPLIED MATERIALS & INTERFACES 2016; 8:8694-8701. [PMID: 26964618 DOI: 10.1021/acsami.6b00657] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ultrathin membranes with intrinsic pores are highly desirable for gas separation applications, because of their controllable pore sizes and homogeneous pore distribution and their intrinsic capacity for high flux. Two-dimensional (2D) covalent organic frameworks (COFs) with layered structures have periodically distributed uniform pores and can be exfoliated into ultrathin nanosheets. As a representative of 2D COFs, a monolayer triazine-based CTF-0 membrane is proposed in this work for effective separation of helium and purification of hydrogen on the basis of first-principles calculations. With the aid of diffusion barrier calculations, it was found that a monolayer CTF-0 membrane can exhibit exceptionally high He and H2 selectivities over Ne, CO2, Ar, N2, CO, and CH4, and the He and H2 permeances are excellent at appropriate temperatures, superior to those of conventional carbon and silica membranes. These observations demonstrate that a monolayer CTF-0 membrane may be potentially useful for helium separation and hydrogen purification.
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Affiliation(s)
- Yong Wang
- Research Institute of Special Chemicals, Taiyuan University of Technology , Taiyuan 030024, Shanxi, China
| | - Jinping Li
- Research Institute of Special Chemicals, Taiyuan University of Technology , Taiyuan 030024, Shanxi, China
| | - Qingyuan Yang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing 100029, China
| | - Chongli Zhong
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology , Beijing 100029, China
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31
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Kou J, Yao J, Wu L, Zhou X, Lu H, Wu F, Fan J. Nanoporous two-dimensional MoS2 membranes for fast saline solution purification. Phys Chem Chem Phys 2016; 18:22210-6. [DOI: 10.1039/c6cp01967f] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Nanoporous two-dimensional MoS2 membranes are excellent candidates for saline solution purification.
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Affiliation(s)
- Jianlong Kou
- State Key Laboratory of Heavy Oil Processing
- and School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Jun Yao
- State Key Laboratory of Heavy Oil Processing
- and School of Petroleum Engineering
- China University of Petroleum (East China)
- Qingdao 266580
- China
| | - Lili Wu
- Institute of Condensed Matter Physics
- and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Xiaoyan Zhou
- Institute of Condensed Matter Physics
- and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Hangjun Lu
- Institute of Condensed Matter Physics
- and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Fengmin Wu
- Institute of Condensed Matter Physics
- and Zhejiang Province Key Laboratory of Solid State Optoelectronic Devices
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Jintu Fan
- Department of Fiber Science and Apparel Design
- Cornell University
- Ithaca
- USA
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32
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Aghaei SM, Monshi MM, Calizo I. A theoretical study of gas adsorption on silicene nanoribbons and its application in a highly sensitive molecule sensor. RSC Adv 2016. [DOI: 10.1039/c6ra21293j] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Silicene nanoribbon is a promising material to detect individual gas molecules with high sensitivity.
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Affiliation(s)
- S. M. Aghaei
- Quantum Electronic Structures Technology Lab
- Department of Electrical and Computer Engineering
- Florida International University
- Miami
- USA
| | - M. M. Monshi
- Quantum Electronic Structures Technology Lab
- Department of Electrical and Computer Engineering
- Florida International University
- Miami
- USA
| | - I. Calizo
- Quantum Electronic Structures Technology Lab
- Department of Electrical and Computer Engineering
- Florida International University
- Miami
- USA
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33
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Ji Y, Dong H, Lin H, Zhang L, Hou T, Li Y. Heptazine-based graphitic carbon nitride as an effective hydrogen purification membrane. RSC Adv 2016. [DOI: 10.1039/c6ra06425f] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A graphitic C3N4 nanosheet with well-ordered sized intrinsic vacancies provides a natural porous diffusion pathway to separate H2 from common gases.
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Affiliation(s)
- Yujin Ji
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Soochow University
- Suzhou
- China
| | - Huilong Dong
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Soochow University
- Suzhou
- China
| | - Haiping Lin
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Soochow University
- Suzhou
- China
| | - Liling Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Soochow University
- Suzhou
- China
| | - Tingjun Hou
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Soochow University
- Suzhou
- China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM)
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices
- Soochow University
- Suzhou
- China
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34
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Zhu L, Xue Q, Li X, Jin Y, Zheng H, Wu T, Guo Q. Theoretical Prediction of Hydrogen Separation Performance of Two-Dimensional Carbon Network of Fused Pentagon. ACS APPLIED MATERIALS & INTERFACES 2015; 7:28502-28507. [PMID: 26632974 DOI: 10.1021/acsami.5b09648] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Using the van-der-Waals-corrected density functional theory (DFT) and molecular dynamic (MD) simulations, we theoretically predict the H2 separation performance of a new two-dimensional sp(2) carbon allotropes-fused pentagon network. The DFT calculations demonstrate that the fused pentagon network with proper pore sizes presents a surmountable energy barrier (0.18 eV) for H2 molecule passing through. Furthermore, the fused pentagon network shows an exceptionally high selectivity for H2/gas (CO, CH4, CO2, N2, et al.) at 300 and 450 K. Besides, using MD simulations we demonstrate that the fused pentagon network exhibits a H2 permeance of 4 × 10(7) GPU at 450 K, which is much higher than the value (20 GPU) in the current industrial applications. With high selectivity and excellent permeability, the fused pentagon network should be an excellent candidate for H2 separation.
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Affiliation(s)
- Lei Zhu
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
| | - Qingzhong Xue
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
| | - Xiaofang Li
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
| | - Yakang Jin
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
| | - Haixia Zheng
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
| | - Tiantian Wu
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
| | - Qikai Guo
- State Key Laboratory of Heavy Oil Processing and ‡College of Science, China University of Petroleum , Qingdao 266580, Shandong P. R. China
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35
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Tan X, Kou L, Tahini HA, Smith SC. Charge-modulated permeability and selectivity in graphdiyne for hydrogen purification. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1086486] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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36
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Zhang R, Li B, Yang J. Effects of stacking order, layer number and external electric field on electronic structures of few-layer C2N-h2D. NANOSCALE 2015; 7:14062-14070. [PMID: 26239535 DOI: 10.1039/c5nr03895b] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recently, a new type of two-dimensional layered material, i.e. a nitrogenated holey two-dimensional structure C2N-h2D, has been synthesized using a simple wet-chemical reaction and used to fabricate a field-effect transistor device (Nat. Commun., 2015, 6, 6486). Here we have performed a first-principles study of the electronic properties of few-layer C2N-h2D with different stacking orders and layer numbers. Because of the interlayer coupling mainly in terms of the orbital interaction, band structure of this system, especially splitting of the bands and band gap, depends on its stacking order between the layers, and the band gap exhibits monotonically decreasing behavior as the layer number increases. All the few-layer C2N-h2D materials have characteristics of direct band gap, irrespective of the stacking order and layer number examined in our calculations. And bulk C2N-h2D has an indirect or direct band gap, depending on the stacking order. Besides, when we apply an out-of-plane electric field on few-layer C2N-h2D, its band gap will decrease as the electric field increases due to a giant Stark effect except for the monolayer case, and even a semiconductor-to-metal transition may occur for few-layer C2N-h2D with more layers under an appropriate electric field. Owing to their tunable band gaps in a wide range, the layered C2N-h2D materials will have tremendous opportunities to be applied in nanoscale electronic and optoelectronic devices.
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Affiliation(s)
- Ruiqi Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.
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37
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Huang C, Wu H, Deng K, Tang W, Kan E. Improved permeability and selectivity in porous graphene for hydrogen purification. Phys Chem Chem Phys 2014; 16:25755-9. [DOI: 10.1039/c4cp04385e] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Song EH, Yoo SH, Kim JJ, Lai SW, Jiang Q, Cho SO. External electric field induced hydrogen storage/release on calcium-decorated single-layer and bilayer silicene. Phys Chem Chem Phys 2014; 16:23985-92. [DOI: 10.1039/c4cp02638a] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The appropriate F can be used to effectively enhance the hydrogen storage–release on the Ca–silicene system.
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Affiliation(s)
- Er Hong Song
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
| | - Sung Ho Yoo
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
| | - Jae Joon Kim
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
| | - Shiau Wu Lai
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
| | - Qing Jiang
- Department of Materials Science and Engineering
- Jilin University
- Changchun 130022, China
| | - Sung Oh Cho
- Department of Nuclear and Quantum Engineering
- Korea Advanced Institute of Science and Technology
- Daejeon 305-701, Republic of Korea
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39
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Hu W, Xia N, Wu X, Li Z, Yang J. Silicene as a highly sensitive molecule sensor for NH3, NO and NO2. Phys Chem Chem Phys 2014; 16:6957-62. [DOI: 10.1039/c3cp55250k] [Citation(s) in RCA: 182] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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40
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Berdiyorov GR, Peeters FM. Influence of vacancy defects on the thermal stability of silicene: a reactive molecular dynamics study. RSC Adv 2014. [DOI: 10.1039/c3ra43487g] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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41
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Xia W, Hu W, Li Z, Yang J. A first-principles study of gas adsorption on germanene. Phys Chem Chem Phys 2014; 16:22495-8. [DOI: 10.1039/c4cp03292f] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The adsorption of common gas molecules (N2, CO, CO2, H2O, NH3, NO, NO2, and O2) on germanene is studied with density functional theory.
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Affiliation(s)
- Wenqi Xia
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
| | - Wei Hu
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
- Computational Research Division
- Lawrence Berkeley National Laboratory
| | - Zhenyu Li
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
- Synergetic Innovation Center of Quantum Information and Quantum Physics
- University of Science and Technology of China
| | - Jinlong Yang
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
- Synergetic Innovation Center of Quantum Information and Quantum Physics
- University of Science and Technology of China
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42
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Hu W, Li Z, Yang J. Structural, electronic, and optical properties of hybrid silicene and graphene nanocomposite. J Chem Phys 2013; 139:154704. [DOI: 10.1063/1.4824887] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Hu W, Wu X, Li Z, Yang J. Helium separation via porous silicene based ultimate membrane. NANOSCALE 2013; 5:9062-9066. [PMID: 23917262 DOI: 10.1039/c3nr02326e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Helium purification has become more important for increasing demands in scientific and industrial applications. In this work, we demonstrated that the porous silicene can be used as an effective ultimate membrane for helium purification on the basis of first-principles calculations. Prinstine silicene monolayer is impermeable to helium gas with a high penetration energy barrier (1.66 eV). However, porous silicene with either Stone-Wales (SW) or divacancy (555,777 or 585) defect presents a surmountable barrier for helium (0.33 to 0.78 eV) but formidable for Ne, Ar, and other gas molecules. In particular, the porous silicene with divacancy defects shows high selectivity for He/Ne and He/Ar, superior to graphene, polyphenylene, and traditional membranes.
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Affiliation(s)
- Wei Hu
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.
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