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Chen X, Zhang L, Jia H, Gao P. Computational Investigation of a Reversible Energy Storage Medium in g-B 5N 3 Decorated by Lithium. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:11582-11589. [PMID: 38785077 DOI: 10.1021/acs.langmuir.4c00779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Graphene-like materials in two dimensions hold great promise for energy storage and transformation applications owing to their distinctive features, such as lightweight composition, porous geometry, etc. Among these materials, a recently discovered unit known as g-B5N3 has demonstrated high performance in energy storage and transformation. In our efforts to enhance its applicability in adsorbing energy gases, we propose a novel composite structure by decorating Li atoms on the surface of pristine g-B5N3. The electronic properties of this composite have been comprehensively investigated using a first-principles method. Our findings reveal that the added Li atoms can be securely anchored on the g-B5N3 with an adsorption energy of -3.01 eV. Furthermore, the Li atom transfers its partial 2s electrons to the g-B5N3, exhibiting considerable electropositivity. These metallic sites effectively polarize the adsorbed H2 molecules, enhancing the mutual electrostatic interactions. Each primitive cell of Li-doped g-B5N3 can adsorb up to 13 H2 molecules, resulting in a storage capacity up to 6.3 wt %. This capacity significantly surpasses the goal of 4.5 wt % set by the U.S. Department of Energy. Furthermore, the typical adsorption energy of -0.209 eV per molecule of H2 aligns with the energy range suitable for reversible hydrogen storage. This study underscores the potential of Li-doped g-B5N3 for energy gas adsorption, shedding light on further advancements in this field.
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Affiliation(s)
- Xihao Chen
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Liang Zhang
- School of Electric and Electrical Engineering, Shangqiu Normal University, Shangqiu 476000, China
| | - Huaijie Jia
- Guizhou Meiling Power Sources Co., Ltd, Zun Yi 563000, China
| | - Peng Gao
- School of Chemistry and Molecular Bioscience & Molecular Horizons, University of Wollongong, Wollongong, New South Wales 2500, Australia
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2
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Chen X, Liu Z, Cheng J, Li J, Guo D, Zhang L, Niu X, Wang N, Wang G, Gao P. First-principles study of Li-doped planar g-C 3N 5 as reversible H 2 storage material. Front Chem 2023; 11:1301690. [PMID: 38025073 PMCID: PMC10630162 DOI: 10.3389/fchem.2023.1301690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 10/11/2023] [Indexed: 12/01/2023] Open
Abstract
Under the background of energy crisis, hydrogen owns the advantage of high combustion and shows considerable environment friendliness; however, to fully utilize this novel resource, the major hurdle lies in its delivery and storage. The development of the in-depth yet systematical methodology for two-dimensional (2D) storage media evaluation still remains to be challenging for computational scientists. In this study, we tried our proposed evaluation protocol on a 2D material, g-C3N5, and its hydrogen storage performance was characterized; and with addition of Li atoms, the changes of its electronical and structural properties were detected. First-principles simulations were conducted to verify its thermodynamics stability; and, its hydrogen adsorption capacity was investigated qualitatively. We found that the charges of the added Li atoms were transferred to the adjacent nitrogen atoms from g-C3N5, with the formation of chemical interactions. Thus, the isolated metallic sites tend to show considerable electropositivity, and can easily polarize the adsorbed hydrogen molecules, and the electrostatic interactions can be enhanced correspondingly. The maximum storage capacity of each primitive cell can be as high as 20 hydrogen molecules with a gravimetric capacity of 8.65 wt%, which surpasses the 5.5 wt% target set by the U.S. Department of Energy. The average adsorption energy is ranged from -0.22 to -0.13 eV. We conclude that the complex 2D material, Li-decorated g-C3N5 (Li@C3N5), can serve as a promising media for hydrogen storage. This methodology provided in this study is fundamental yet instructive for future 2D hydrogen storage materials development.
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Affiliation(s)
- Xihao Chen
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, China
- Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing, China
| | - Zonghang Liu
- School of Science and Engineering, Shenzhen Key Laboratory of Functional Aggregate Materials, The Chinese University of Hong Kong, Shenzhen, China
| | - Jiang Cheng
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, China
| | - Jiwen Li
- College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, China
| | - Donglin Guo
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing, China
| | - Liang Zhang
- School of Electric and Electrical Engineering, Shangqiu Normal University, Shangqiu, China
| | - Xianghong Niu
- New Energy Technology Engineering Laboratory of Jiangsu Province, School of Science, Nanjing University of Posts and Telecommunications, Nanjing, China
| | - Ning Wang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China
- Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing, China
| | - Guangzhao Wang
- Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing, China
| | - Peng Gao
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW, Australia
- Molecular Horizons, University of Wollongong, Wollongong, NSW, Australia
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3
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Xia R, Peng Y, Fang L, Meng X. Electrical field and biaxial strain tunable electronic properties of the PtSe 2/Hf 2CO 2 heterostructure. RSC Adv 2023; 13:26812-26821. [PMID: 37701500 PMCID: PMC10495041 DOI: 10.1039/d3ra04363k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 08/09/2023] [Indexed: 09/14/2023] Open
Abstract
The structure and electronic properties of two-dimensional vertical van der Waals PtSe2/Hf2CO2 heterostructure have been investigated based on first-principles calculations. The results show that the PtSe2 and Hf2CO2 monolayers form a type-I heterostructure with both the conduction band minimum (CBM) and valence band maximum (VBM) located at the Hf2CO2 layer. The electronic properties of PtSe2/Hf2CO2 heterostructure can be effectively adjusted by applying external electric field or biaxial strain. The transition in band alignment from type-I to type-II can be manipulated by controlling the strength and direction of the electric field. Additionally, the transition from type-I to type-II have also taken place under the strains, and the band gap of the PtSe2/Hf2CO2 heterostructure decreases with increasing the compressive or tensible strain. Under a strong strain of -8%, the PtSe2/Hf2CO2 heterostructure can transform from semiconductor to metal. These findings provide a promising method to tune the electronic properties of PtSe2/Hf2CO2 heterostructure and design a new vdW heterostructure in the applications for electronic and optoelectronic devices.
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Affiliation(s)
- Ruizhe Xia
- School of Science, Hubei University of Technology Wuhan 430068 P. R. China
| | - Yi Peng
- School of Science, Hubei University of Technology Wuhan 430068 P. R. China
| | - Li Fang
- School of Science, Hubei University of Technology Wuhan 430068 P. R. China
| | - Xuan Meng
- School of Science, Hubei University of Technology Wuhan 430068 P. R. China
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4
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Zhang Q, Zhu H, Yang X, Chen L, Shen Y. A multi-factor adjustable PtSe 2/GaN van der Waals heterostructure with enhanced photocatalytic performance. Phys Chem Chem Phys 2023; 25:22477-22486. [PMID: 37581355 DOI: 10.1039/d3cp02167j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
Two-dimensional van der Waals heterostructures with multiple tunable approaches in electronic and optical properties are highly superior for photocatalysis and novel devices. By applying first-principles calculations, we systematically studied the electronic structure, optical absorption, carrier mobility and solar-to-hydrogen efficiency of PtSe2/GaN heterostructures, which are affected by different thicknesses, varying directions of polarization of the GaN nanosheets and applied mechanical strain of the whole system. The results indicate that these heterostructures exhibit thermodynamic stability at room-temperature (300 K), and most configurations have type-II band alignment, among which the heterostructure consisting of GaN trilayers and PtSe2 shows high visible-light absorption (1.71 × 105 cm-1) and ultra-wide range of pH values (pH = 0-14) for the photocatalytic water splitting reaction and exceedingly high overpotential for the hydrogen evolution reaction (3.375 eV). Simultaneously, being two of the most significant parameters of photocatalysis and devices, the carrier mobility and solar-to-hydrogen efficiency have also been calculated, respectively, reaching up to 1601 cm2 V-1 s-1 and 17.2%. Moreover, the photoelectrical properties can be highly tuned through further biaxial strain engineering; especially, the visible-light absorption can be enhanced to 2.85 × 105 cm-1 by applying 6% compression strain. Thus, the PtSe2/GaN heterostructure we proposed shows a broad prospect for photocatalytic water splitting.
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Affiliation(s)
- Qihao Zhang
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China.
| | - Hua Zhu
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China.
| | - Xiaodong Yang
- Key Laboratory of Ecophysics and Department of Physics, Shihezi University, Xinjiang 832003, China
| | - Liang Chen
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China.
| | - Yang Shen
- Institute of Optoelectronics Technology, China Jiliang University, Hangzhou 310018, China.
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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5
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Semiconductors Application Forms and Doping Benefits to Wastewater Treatment: A Comparison of TiO2, WO3, and g-C3N4. Catalysts 2022. [DOI: 10.3390/catal12101218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Photocatalysis has been vastly applied for the removal of contaminants of emerging concern (CECs) and other micropollutants, with the aim of future water reclamation. As a process based upon photon irradiation, materials that may be activated through natural light sources are highly pursued, to facilitate their application and reduce costs. TiO2 is a reference material, and it has been greatly optimized. However, in its typical configuration, it is known to be mainly active under ultraviolet radiation. Thus, multiple alternative visible light driven (VLD) materials have been intensively studied recently. WO3 and g-C3N4 are currently attractive VLD catalysts, with WO3 possessing similarities with TiO2 as a metal oxide, allowing correlations between the knowledge regarding the reference catalyst, and g-C3N4 having an interesting and distinct non-metallic polymeric structure with the benefit of easy production. In this review, recent developments towards CECs degradation in TiO2 based photocatalysis are discussed, as reference catalyst, alongside the selected alternative materials, WO3 and g-C3N4. The aim here is to evaluate the different techniques more commonly explored to enhance catalyst photo-activity, specifically doping with multiple elements and the formation of composite materials. Moreover, the possible combination of photocatalysis and ozonation is also explored, as a promising route to potentialize their individual efficiencies and overcome typical drawbacks.
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Gao P, Chen X, Li J, Wang Y, Liao Y, Liao S, Zhu G, Tan Y, Zhai F. Computational Evaluation of Al-Decorated g-CN Nanostructures as High-Performance Hydrogen-Storage Media. NANOMATERIALS 2022; 12:nano12152580. [PMID: 35957009 PMCID: PMC9370157 DOI: 10.3390/nano12152580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/14/2022] [Accepted: 07/26/2022] [Indexed: 11/25/2022]
Abstract
Density functional theory (DFT) calculations were employed to solve the electronic structure of aluminum (Al)-doped g-CN and further to evaluate its performance in hydrogen storage. Within our configurations, each 2 × 2 supercell of this two-dimensional material can accommodate four Al atoms, and there exist chemical bonding and partial charge transfer between pyridinic nitrogen (N) and Al atoms. The doped Al atom loses electrons and tends to be electronically positive; moreover, a local electronic field can be formed around itself, inducing the adsorbed H2 molecules to be polarized. The polarized H2 molecules were found to be adsorbed by both the N and Al atoms, giving rise to the electrostatic attractions between the H2 molecules and the Al-doped g-CN surface. We found that each 2 × 2 supercell can adsorb at most, 24 H2 molecules, and the corresponding adsorption energies ranged from −0.11 to −0.31 eV. The highest hydrogen-storage capacity of the Al-doped g-CN can reach up to 6.15 wt%, surpassing the goal of 5.50 wt% proposed by the U.S. Department of Energy. Additionally, effective adsorption sites can be easily differentiated by the electronic potential distribution map of the optimized configurations. Such a composite material has been proven to possess a high potential for hydrogen storage, and we have good reasons to expect that in the future, more advanced materials can be developed based on this unit.
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Affiliation(s)
- Peng Gao
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW 2500, Australia;
- Molecular Horizons, University of Wollongong, Wollongong, NSW 2500, Australia
| | - Xihao Chen
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China; (X.C.); (Y.L.); (G.Z.)
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Jiwen Li
- College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
| | - Yue Wang
- Department of Electrical Engineering, Hanyang University, Seoul 04763, Korea;
| | - Ya Liao
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China; (X.C.); (Y.L.); (G.Z.)
| | - Shichang Liao
- School of Materials and Energy, Southwest University, Chongqing 400715, China;
| | - Guangyu Zhu
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China; (X.C.); (Y.L.); (G.Z.)
| | - Yuebin Tan
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, DC 20007, USA;
| | - Fuqiang Zhai
- School of Materials Science and Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China; (X.C.); (Y.L.); (G.Z.)
- Correspondence:
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7
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Jakhar M, Kumar A, Ahluwalia PK, Tankeshwar K, Pandey R. Engineering 2D Materials for Photocatalytic Water-Splitting from a Theoretical Perspective. MATERIALS (BASEL, SWITZERLAND) 2022; 15:2221. [PMID: 35329672 PMCID: PMC8954018 DOI: 10.3390/ma15062221] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/06/2022] [Accepted: 03/14/2022] [Indexed: 12/19/2022]
Abstract
Splitting of water with the help of photocatalysts has gained a strong interest in the scientific community for producing clean energy, thus requiring novel semiconductor materials to achieve high-yield hydrogen production. The emergence of 2D nanoscale materials with remarkable electronic and optical properties has received much attention in this field. Owing to the recent developments in high-end computation and advanced electronic structure theories, first principles studies offer powerful tools to screen photocatalytic systems reliably and efficiently. This review is organized to highlight the essential properties of 2D photocatalysts and the recent advances in the theoretical engineering of 2D materials for the improvement in photocatalytic overall water-splitting. The advancement in the strategies including (i) single-atom catalysts, (ii) defect engineering, (iii) strain engineering, (iv) Janus structures, (v) type-II heterostructures (vi) Z-scheme heterostructures (vii) multilayer configurations (viii) edge-modification in nanoribbons and (ix) the effect of pH in overall water-splitting are summarized to improve the existing problems for a photocatalytic catalytic reaction such as overcoming large overpotential to trigger the water-splitting reactions without using cocatalysts. This review could serve as a bridge between theoretical and experimental research on next-generation 2D photocatalysts.
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Affiliation(s)
- Mukesh Jakhar
- Department of Physics, Central University of Punjab, Bathinda 151401, India;
| | - Ashok Kumar
- Department of Physics, Central University of Punjab, Bathinda 151401, India;
| | | | - Kumar Tankeshwar
- Department of Physics and Astrophysics, Central University of Haryana, Mahendragarh 123031, India;
| | - Ravindra Pandey
- Department of Physics, Michigan Technological University, Houghton, MI 49931, USA;
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8
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Fu C, Wang G, Huang Y, Chen Y, Yuan H, Ang YS, Chen H. Two-dimensional CdS/SnS 2 heterostructure: a highly efficient direct Z-scheme water splitting photocatalyst. Phys Chem Chem Phys 2022; 24:3826-3833. [PMID: 35084406 DOI: 10.1039/d1cp04679a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A desired water splitting photocatalyst should not only possess a suitable bandgap and band edge position, but also host the spontaneous progress for overall water splitting without the aid of any sacrificial agents. In this work, we propose a two-dimensional CdS/SnS2 heterostructure (CSHS) as a possible water splitting photocatalyst by first-principles calculations. The CSHS enhances the absorption of visible and infrared light, and the type-II band alignment guarantees the spatial separation of the photoinduced carriers. The induced built-in electric field across the CSHS interface efficiently separates the photoexcited carriers and extends their carrier lifetimes. All these properties make the CSHS a direct Z-scheme system with the hydrogen and oxygen evolution reactions occurring, respectively, at the CdS and SnS2 layers. More encouragingly, the introduction of a S-vacancy into SnS2 could effectively lower the overpotential of the oxygen evolution reaction, thus ensuring the overall water redox reaction to be achieved spontaneously under light irradiation. Our findings suggest that the CSHS is a promising water splitting photocatalyst.
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Affiliation(s)
- Can Fu
- School of Physics Science and Technology, Southwest University, Chongqing 400715, China.
| | - Guangzhao Wang
- Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing 408100, China. .,Science, Mathematics and Technology, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Yuhong Huang
- School of Physics Science and Technology, Southwest University, Chongqing 400715, China.
| | - Ying Chen
- School of Physics Science and Technology, Southwest University, Chongqing 400715, China. .,School of Electronic and Information Engineering, Anshun College, Anshun 561000, China
| | - Hongkuan Yuan
- School of Physics Science and Technology, Southwest University, Chongqing 400715, China.
| | - Yee Sin Ang
- Science, Mathematics and Technology, Singapore University of Technology and Design, Singapore, 487372, Singapore
| | - Hong Chen
- School of Physics Science and Technology, Southwest University, Chongqing 400715, China.
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9
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Bafekry A, Faraji M, Hieu NN, Ang YS, Karbasizadeh S, Abdolhosseini Sarsari I, Ghergherehchi M. Two-dimensional Dirac half-metal in porous carbon nitride C 6N 7monolayer via atomic doping. NANOTECHNOLOGY 2021; 33:075707. [PMID: 34673552 DOI: 10.1088/1361-6528/ac31e7] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Motivated by the recent experimental discovery of C6N7monolayer (Zhaoet al2021Science Bulletin66, 1764), we show that C6N7monolayer co-doped with C atom is a Dirac half-metal by employing first-principle density functional theory calculations. The structural, mechanical, electronic and magnetic properties of the co-doped C6N7are investigated by both the PBE and HSE06 functionals. Pristine C6N7monolayer is a semiconductor with almost isotropic electronic dispersion around the Γ point. As the doping of the C6N7takes place, the substitution of an N atom with a C atom transforms the monolayer into a dilute magnetic semiconductor, with the spin-up channel showing a band gap of 2.3 eV, while the spin-down channel exhibits a semimetallic phase with multiple Dirac points. The thermodynamic stability of the system is also checked out via AIMD simulations, showing the monolayer to be free of distortion at 500 K. The emergence of Dirac half-metal in carbon nitride monolayer via atomic doping reveals an exciting material platform for designing novel nanoelectronics and spintronics devices.
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Affiliation(s)
- A Bafekry
- Department of Radiation Application, Shahid Beheshti University, Tehran, Iran
| | - M Faraji
- Micro and Nanotechnology Graduate Program, TOBB University of Economics and Technology, Sogutozu Caddesi No 43 Sogutozu, 06560 Ankara, Turkey
| | - N N Hieu
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
| | - Yee Sin Ang
- Science, Mathematics and Technology (SMT) Cluster, Singapore University of Technology and Design, 487372, Singapore
| | - S Karbasizadeh
- Department of Physics, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | | | - M Ghergherehchi
- Department of Electrical and Computer Engineering, Sungkyunkwan University, 16419 Suwon, Republic of Korea
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10
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Pan J, Zhang W, Xu X, Hu J. The mechanism of enhanced photocatalytic activity for water-splitting of ReS 2 by strain and electric field engineering. RSC Adv 2021; 11:23055-23063. [PMID: 35480430 PMCID: PMC9034362 DOI: 10.1039/d1ra03821d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 06/16/2021] [Indexed: 11/24/2022] Open
Abstract
To enhance the photocatalytic water splitting performance of 2D ReS2, we theoretically propose a feasible strategy to engineer its band structure by applying strain or an electric field. Our calculated results show that the strains greatly tune the electronic structure of ReS2 especially band gap and band edge positions, because the strains significantly alter the crystal structure and then cause rearrangement of the surface charge. However, electric fields have little influence on band gap but obviously affect the band edge positions. This is because the electric fields have little effect on the crystal structure of ReS2 but easily produce an in-plane electric dipole moment. The shifts in band edge position mainly arise from competition between the surface charge and the in-plane electric dipole. For an applied strain, the shifts are dominated by rearrangement of surface charge; for an applied electric field, the shifts are determined by an induced electric dipole moment. Importantly, functionalized ReS2 with a bi-axial strain of −4% or an electronic field of −0.1 V Å−1 may be good candidates for water-splitting photocatalysts owing to their suitable band edge positions for water splitting, ideal band gaps, good stability, reduced electron–hole recombination and high carrier mobility. We hope our findings will stimulate experimental efforts to develop new photocatalysts based on functionalized ReS2. This work proposes applying the strain and electric filed to engineer the band structure of 2D ReS2 and enhance its photocatalytic activity for hydrogen production through water-splitting.![]()
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Affiliation(s)
- Jing Pan
- College of Physics Science and Technology
- Yangzhou University
- Yangzhou
- China
| | - Wannian Zhang
- College of Physics Science and Technology
- Yangzhou University
- Yangzhou
- China
| | - Xiaoyong Xu
- College of Physics Science and Technology
- Yangzhou University
- Yangzhou
- China
| | - Jingguo Hu
- College of Physics Science and Technology
- Yangzhou University
- Yangzhou
- China
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11
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Bafekry A, Nguyen CV, Goudarzi A, Ghergherehchi M, Shafieirad M. Investigation of strain and doping on the electronic properties of single layers of C 6N 6 and C 6N 8: a first principles study. RSC Adv 2020; 10:27743-27751. [PMID: 35516966 PMCID: PMC9055606 DOI: 10.1039/d0ra04463f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 07/09/2020] [Indexed: 12/02/2022] Open
Abstract
In this work, by performing first-principles calculations, we explore the effects of various atom impurities on the electronic and magnetic properties of single layers of C6N6 and C6N8. Our results indicate that atom doping may significantly modify the electronic properties. Surprisingly, doping Cr into a holey site of C6N6 monolayer was found to exhibit a narrow band gap of 125 meV upon compression strain, considering the spin-orbit coupling effect. Also, a C atom doped in C6N8 monolayer shows semi-metal nature under compression strains larger than -2%. Our results propose that Mg or Ca doped into strained C6N6 may exhibit small band gaps in the range of 10-30 meV. In addition, a magnetic-to-nonmagnetic phase transition can occur under large tensile strains in the Ca doped C6N8 monolayer. Our results highlight the electronic properties and magnetism of C6N6 and C6N8 monolayers. Our results show that the electronic properties can be effectively modified by atom doping and mechanical strain, thereby offering new possibilities to tailor the electronic and magnetic properties of C6N6 and C6N8 carbon nitride monolayers.
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Affiliation(s)
- Asadollah Bafekry
- Department of Physics, University of Guilan 41335-1914 Rasht Iran
- Department of Physics, University of Antwerp Groenenborgerlaan 171 B-2020 Antwerp Belgium
| | - Chuong V Nguyen
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam
| | - Abbas Goudarzi
- Department of Physics, University of North Texas Denton Texas USA
| | - Mitra Ghergherehchi
- College of Electronic and Electrical Engineering, Sungkyunkwan University Suwon Korea
| | - Mohsen Shafieirad
- Department of Electrical and Computer Engineering, University of Kashan Kashan Iran
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12
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Wang G, Gong L, Li Z, Wang B, Zhang W, Yuan B, Zhou T, Long X, Kuang A. A two-dimensional CdO/CdS heterostructure used for visible light photocatalysis. Phys Chem Chem Phys 2020; 22:9587-9592. [PMID: 32322864 DOI: 10.1039/d0cp00876a] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Based on hybrid density functional calculations, the geometrical and electronic structures of a two-dimensional (2D) CdO/CdS heterostructure (HT) formed by a CdO monolayer (ML) and a CdS ML are investigated. The formation of the CdO/CdS HT is exothermic, and the CdO/CdS HT shows excellent ability for visible light absorption. The CdO/CdS HT with a rotation angle of 0° possesses the characteristics of type-II band alignment and strong built-in electric field across the interface, which boost the photogenerated carrier separation. Besides, the band edge positions of the CdO/CdS HT of 0° are energetically favorable for overall water-splitting processes with the pH scope of 0-3.6. Therefore, the CdO/CdS HT is a promising photocatalyst to split water.
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Affiliation(s)
- Guangzhao Wang
- Key Laboratory of Micro Nano Optoelectronic Devices and Intelligent Perception Systems, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, School of Electronic Information Engineering, Yangtze Normal University, Chongqing 408100, China.
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13
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Di Bartolomeo A. Emerging 2D Materials and Their Van Der Waals Heterostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E579. [PMID: 32235754 PMCID: PMC7153384 DOI: 10.3390/nano10030579] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 03/17/2020] [Indexed: 02/06/2023]
Abstract
Two-dimensional (2D) materials and their van der Waals heterojunctions offer the opportunity to combine layers with different properties as the building blocks to engineer new functional materials for high-performance devices, sensors, and water-splitting photocatalysts. A tremendous amount of work has been done thus far to isolate or synthesize new 2D materials as well as to form new heterostructures and investigate their chemical and physical properties. This article collection covers state-of-the-art experimental, numerical, and theoretical research on 2D materials and on their van der Waals heterojunctions for applications in electronics, optoelectronics, and energy generation.
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Affiliation(s)
- Antonio Di Bartolomeo
- Physics Department "E.R.Caianiello" and "Interdepartmental center NANOMATES", University of Salerno, Fisciano, 84084 Salerno, Italy
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14
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Wang G, Li Y, Zhang L, Chang J, Li Y, Xia L, Xiao S, Dang S, Li C. Two dimensional ZnO/AlN composites used for photocatalytic water-splitting: a hybrid density functional study. RSC Adv 2019; 9:36234-36239. [PMID: 35540565 PMCID: PMC9074942 DOI: 10.1039/c9ra06104e] [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: 08/06/2019] [Accepted: 10/09/2019] [Indexed: 12/22/2022] Open
Abstract
Using hybrid density functionals, we study the interfacial interactions and electronic properties of ZnO/AlN composites with the consideration of rotation angles and biaxial strains in order to enhance the photocatalytic performance for water-splitting. The different rotated composites, and -2% strained, original, and 2% strained ZnO/AlN composites can be easily prepared owing to the negative interface formation energies. The bandgaps and band alignments of ZnO/AlN composites can be significantly tuned by biaxial strains. Particularly, the appropriate bandgap for visible light absorption, proper band alignment for spontaneous water-splitting, and the formed electric field promoting photoinduced carrier separation make the 2% strained ZnO/AlN composite a potential candidate for photocatalytic water-splitting. This work shines some light on designing two dimensional heterostructured photocatalysts.
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Affiliation(s)
- Guangzhao Wang
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
| | - Yumo Li
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
| | - Ling Zhang
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
| | - Junli Chang
- School of Physical Science and Technology, Southwest University Chongqing 400715 China
| | - Yadong Li
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
| | - Liangping Xia
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
| | - Shuyuan Xiao
- Institute for Advanced Study, Nanchang University Nanchang 330031 China
| | - Suihu Dang
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
| | - Chunxia Li
- School of Electronic Information Engineering, Key Laboratory of Extraordinary Bond Engineering and Advanced Materials Technology of Chongqing, Yangtze Normal University Chongqing 408100 China
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15
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Gao X, Shen Y, Ma Y, Wu S, Zhou Z. Theoretical Insights into Two-Dimensional IV–V Compounds: Photocatalysts for the Overall Water Splitting and Nanoelectronic Applications. Inorg Chem 2019; 58:12053-12068. [DOI: 10.1021/acs.inorgchem.9b01255] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Xu Gao
- Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yanqing Shen
- Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Yanyan Ma
- Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Shengyao Wu
- Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Zhongxiang Zhou
- Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China
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16
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Zhang B, Wang Z, Peng X, Wang Z, Zhou L, Yin Q. A Novel Route to Manufacture 2D Layer MoS 2 and g-C 3N 4 by Atmospheric Plasma with Enhanced Visible-Light-Driven Photocatalysis. NANOMATERIALS 2019; 9:nano9081139. [PMID: 31398848 PMCID: PMC6723641 DOI: 10.3390/nano9081139] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 07/29/2019] [Accepted: 08/06/2019] [Indexed: 01/28/2023]
Abstract
An atmospheric plasma treatment strategy was developed to prepare two-dimensional (2D) molybdenum disulfide (MoS2) and graphitic carbon nitride (g-C3N4) nanosheets from (NH4)2MoS4 and bulk g-C3N4, respectively. The moderate temperature of plasma is beneficial for exfoliating bulk materials to thinner nanosheets. The thicknesses of as-prepared MoS2 and g-C3N4 nanosheets are 2-3 nm and 1.2 nm, respectively. They exhibited excellent photocatalytic activity on account of the nanosheet structure, larger surface area, more flexible photophysical properties, and longer charge carrier average lifetime. Under visible light irradiation, the hydrogen production rates of MoS2 and g-C3N4 by plasma were 3.3 and 1.5 times higher than the corresponding bulk materials, respectively. And g-C3N4 by plasma exhibited 2.5 and 1.3 times degradation rates on bulk that for methyl orange and rhodamine B, respectively. The mechanism of plasma preparation was proposed on account of microstructure characterization and online mass spectroscopy, which indicated that gas etching, gas expansion, and the repulsive force of electron play the key roles in the plasma exfoliation. Plasma as an environmentally benign approach provides a general platform for fabricating ultrathin nanosheet materials with prospective applications as photocatalysts for pollutant degradation and water splitting.
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Affiliation(s)
- Bo Zhang
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhenhai Wang
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xiangfeng Peng
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhao Wang
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
| | - Ling Zhou
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - QiuXiang Yin
- National Engineering Research Center of Industry Crystallization Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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17
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Gao X, Shen Y, Ma Y, Wu S, Zhou Z. Investigation on photocatalytic mechanism of graphitic SiC (g-SiC)/MoS2 van der Waals heterostructured photocatalysts for overall water splitting. Phys Chem Chem Phys 2019; 21:15372-15379. [DOI: 10.1039/c9cp02792k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional MoS2-based heterostructures have been given great attention due to their excellent properties.
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Affiliation(s)
- Xu Gao
- Department of Physics
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Yanqing Shen
- Department of Physics
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Yanyan Ma
- Department of Physics
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Shengyao Wu
- Department of Physics
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Zhongxiang Zhou
- Department of Physics
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
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