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Chai S, Chi Y, Sun W, Hou X, Pei S, Luo K, Lv W. Synthesis of N-doped and P-doped silicon quantum dots and their applications for tetracycline detection in the honey samples and antibacterial properties. Food Chem 2024; 450:139324. [PMID: 38615527 DOI: 10.1016/j.foodchem.2024.139324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/24/2024] [Accepted: 04/08/2024] [Indexed: 04/16/2024]
Abstract
The abuse of tetracycline can lead to its residue in animal derived foods, posing many potential hazards to human health. Therefore, rapid and accurate detection of tetracycline is an important means to ensure food safety. Nitrogen doped and phosphorus doped silicon quantum dots (N-SiQDs, P-SiQDs) with remarkable optical stability were fabricated via a one-pot hydrothermal procedure in this study. Upon the excitation at 346 nm, N-SiQDs and P-SiQDs emitted fluorescence at 431 nm and 505 nm, respectively. Two SiQDs had the potential to serve as a probe for detecting low concentrations of tetracycline (TC), employing a mechanism of the static quenching effect. The calibration curves of N-SiQDs and P-SiQDs were linear within the range of 0-0.8 μM and 0-0.4 μM, the limits of detection were low as 5.35 × 10-4 μmol/L and 6.90 × 10-3 μmol/L, respectively. This method could be used successfully to detect TC in honey samples. Moreover, the remarkable antibacterial efficacy of two SiQDs could be attributed to the generation of a large number of intracellular reactive oxygen species. The SEM images showed that the structure of bacterial cell was disrupted and the surface became irregular when treated with both SiQDs. These properties enabled potential usage of SiQDs as excellent antibacterial material for different biomedical applications.
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Affiliation(s)
- Shuiqin Chai
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China.
| | - Yuting Chi
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China
| | - Wanlin Sun
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China
| | - Xin Hou
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China
| | - Shuchen Pei
- College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China
| | - Kang Luo
- People's Hospital Affiliated to Chongqing Three Gorges Medical College, Chongqing 404037, PR China.
| | - Wenyi Lv
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, PR China.
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2
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Samawi KA, Mohammed BA, Salman EAA, Mahmoud HMA, Sameen AZ, Mohealdeen SM, Abdulkareem-Alsultan G, Nassar MF. Vertical growth of a 3D Ni-Co-LDH/N-doped graphene aerogel: a cost-effective and high-performance sulfur host for Li-S batteries. Phys Chem Chem Phys 2024; 26:9284-9294. [PMID: 38469699 DOI: 10.1039/d3cp05716j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Sulfur hosts and conversion catalysts based on NiCo-LDHs exhibit potential for improving the performance of Li-S batteries. Nevertheless, their low electron conductivity and aggregation propensity restrict their applicability. This investigation employs a temporary scaffold of ZIF-67 to produce a nanotube assembly of Ni-Co-LDH encapsulated within an N-doped graphene sponge. The electrochemically developed interface has an extended active surface area, and the clumping of LDH nanosheets is effectively inhibited by the design of the nanotube arrangement. Furthermore, the incorporation of nitrogen within the structure of graphene results in a boost of electrical conductivity and provides an increased quantity of active sites. Interfacial electron transport is facilitated by the interfacial rearrangement of charges resulting from p-n heterojunctions and fosters redox activity. In this study, the researchers have presented the double role played by the nickel-cobalt layered double hydroxide (NiCo-LDH) nanotubes in improving the polysulphide (LiPS) conversion and decreasing the movement of the sulphur (S) ions by forming surface-bound intermediates. The battery that was fabricated using the above composite cathode mixture showed a higher energy storage ability, i.e., 1190.0 mA h g-1 at J = 0.2. Furthermore, the battery showed a significantly higher capacity to rapidly supply energy and displayed a rate capacity of 670.1 mA h g-1 at J = 5C. Also, the above battery displayed a longer cycle life, with 1000 charge-discharge cycles and the deterioration rate of 0.029% for each cycle.
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Affiliation(s)
- Khalida Abaid Samawi
- Department of Chemistry, College of Science, Al-Nahrain University, Baghdad, Iraq
| | - Bassam A Mohammed
- Thermal Mechanic Techniques Engineering Department, Basra Engineering Technical College, Southern Technical University, Basra, Iraq
| | | | - HassabAlla M A Mahmoud
- Department of Physics, Faculty of Sciences and Arts, King Khalid University, Muhayil Asir 63311, Saudi Arabia
| | - Aws Zuhair Sameen
- College of Medical Techniques, Al-Farahidi University, Baghdad, Iraq
| | | | - G Abdulkareem-Alsultan
- Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia.
| | - Maadh Fawzi Nassar
- Integrated Chemical BioPhysics Research, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
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3
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Morais WP, Inacio GJ, Amorim RG, Paz WS, Pansini FNN, de Souza FAL. Topological line defects in hexagonal SiC monolayer. Phys Chem Chem Phys 2023. [PMID: 38037394 DOI: 10.1039/d3cp04267g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Defect engineering of two-dimensional (2D) materials offers an unprecedented route to increase their functionality and broaden their applicability. In light of the recent synthesis of the 2D Silicon Carbide (SiC), a deep understanding of the effect of defects on the physical and chemical properties of this new SiC allotrope becomes highly desirable. This study investigates 585 extended line defects (ELDs) in hexagonal SiC considering three types of interstitial atom pairs (SiSi-, SiC-, and CC-ELD) and using computational methods like Density Functional Theory, Born-Oppenheimer Molecular Dynamics, and Kinetic Monte-Carlo (KMC). Results show that the formation of all ELD systems is endothermic, with the CC-ELD structure showing the highest stability at 300 K. To further characterize the ELDs, simulated scanning tunneling microscopy (STM) is employed, and successfully allow identify and distinguish the three types of ELDs. Although pristine SiC has a direct band gap of 2.48 eV, the presence of ELDs introduces mid-gap states derived from the pz orbitals at the defect sites. Furthermore, our findings reveal that the ELD region displays enhanced reactivity towards hydrogen adsorption, which was confirmed by KMC simulations. Overall, this research provides valuable insights into the structural, electronic, and reactivity properties of ELDs in hexagonal SiC monolayers and paves the way for potential applications in areas such as catalysis, optoelectronics, and surface science.
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Affiliation(s)
- Wallace P Morais
- Departamento de Física, Universidade Federal do Espírito Santo, Vitória-ES, 29075-910, Brazil
| | - Guilherme J Inacio
- Departamento de Física, Universidade Federal do Espírito Santo, Vitória-ES, 29075-910, Brazil
| | - Rodrigo G Amorim
- Departamento de Física, ICEx, Universidade Federal Fluminense - UFF, Volta Redonda/RJ, Brazil
| | - Wendel S Paz
- Departamento de Física, Universidade Federal do Espírito Santo, Vitória-ES, 29075-910, Brazil
| | - Fernando N N Pansini
- Departamento de Física, Universidade Federal do Espírito Santo, Vitória-ES, 29075-910, Brazil
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Yin R, Wang Z, Tan S, Ma C, Wang B. On-Surface Synthesis of Graphene Nanoribbons with Atomically Precise Structural Heterogeneities and On-Site Characterizations. ACS NANO 2023; 17:17610-17623. [PMID: 37666005 DOI: 10.1021/acsnano.3c06128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Graphene nanoribbons (GNRs) are strips of graphene, with widths of a few nanometers, that are promising candidates for future applications in nanodevices and quantum information processing due to their highly tunable structure-dependent electronic, spintronic, topological, and optical properties. Implantation of periodic structural heterogeneities, such as heteroatoms, nanopores, and non-hexagonal rings, has become a powerful manner for tailoring the designer properties of GNRs. The bottom-up synthesis approach, by combining on-surface chemical reactions based on rationally designed molecular precursors and in situ tip-based microscopic and spectroscopic techniques, promotes the construction of atomically precise GNRs with periodic structural modulations. However, there are still obstacles and challenges lying on the way toward the understanding of the intrinsic structure-property relations, such as the strong screening and Fermi level pinning effect of the normally used transition metal substrates and the lack of collective tip-based techniques that can cover multi-internal degrees of freedom of the GNRs. In this Perspective, we briefly review the recent progress in the on-surface synthesis of GNRs with diverse structural heterogeneities and highlight the structure-property relations as characterized by the noncontact atomic force microscopy and scanning tunneling microscopy/spectroscopy. We furthermore motivate to deliver the need for developing strategies to achieve quasi-freestanding GNRs and for exploiting multifunctional tip-based techniques to collectively probe the intrinsic properties.
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Affiliation(s)
- Ruoting Yin
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhengya Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shijing Tan
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Chuanxu Ma
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Bing Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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Chen J, Wang C, Li H, Xu X, Yang J, Huo Z, Wang L, Zhang W, Xiao X, Ma Y. Recent Advances in Surface Modifications of Elemental Two-Dimensional Materials: Structures, Properties, and Applications. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010200. [PMID: 36615394 PMCID: PMC9822514 DOI: 10.3390/molecules28010200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 12/17/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
The advent of graphene opens up the research into two-dimensional (2D) materials, which are considered revolutionary materials. Due to its unique geometric structure, graphene exhibits a series of exotic physical and chemical properties. In addition, single-element-based 2D materials (Xenes) have garnered tremendous interest. At present, 16 kinds of Xenes (silicene, borophene, germanene, phosphorene, tellurene, etc.) have been explored, mainly distributed in the third, fourth, fifth, and sixth main groups. The current methods to prepare monolayers or few-layer 2D materials include epitaxy growth, mechanical exfoliation, and liquid phase exfoliation. Although two Xenes (aluminene and indiene) have not been synthesized due to the limitations of synthetic methods and the stability of Xenes, other Xenes have been successfully created via elaborate artificial design and synthesis. Focusing on elemental 2D materials, this review mainly summarizes the recently reported work about tuning the electronic, optical, mechanical, and chemical properties of Xenes via surface modifications, achieved using controllable approaches (doping, adsorption, strain, intercalation, phase transition, etc.) to broaden their applications in various fields, including spintronics, electronics, optoelectronics, superconducting, photovoltaics, sensors, catalysis, and biomedicines. These advances in the surface modification of Xenes have laid a theoretical and experimental foundation for the development of 2D materials and their practical applications in diverse fields.
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Affiliation(s)
- Junbo Chen
- Key Laboratory of Quantum Matt Science, Henan Key Laboratory of Photovoltaic Materials, Henan University, Zhengzhou 450046, China
| | - Chenhui Wang
- Key Laboratory of Quantum Matt Science, Henan Key Laboratory of Photovoltaic Materials, Henan University, Zhengzhou 450046, China
| | - Hao Li
- School of Physical Science and Technology, Wuhan University, Wuhan 430072, China
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Xin Xu
- State Key Lab of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Jiangang Yang
- School of Physical Science and Technology, Wuhan University, Wuhan 430072, China
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Zhe Huo
- Key Laboratory of Quantum Matt Science, Henan Key Laboratory of Photovoltaic Materials, Henan University, Zhengzhou 450046, China
| | - Lixia Wang
- Key Laboratory of Quantum Matt Science, Henan Key Laboratory of Photovoltaic Materials, Henan University, Zhengzhou 450046, China
| | - Weifeng Zhang
- Key Laboratory of Quantum Matt Science, Henan Key Laboratory of Photovoltaic Materials, Henan University, Zhengzhou 450046, China
- Correspondence: (W.Z.); (X.X.); (Y.M.)
| | - Xudong Xiao
- School of Physical Science and Technology, Wuhan University, Wuhan 430072, China
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, Wuhan University, Wuhan 430072, China
- Correspondence: (W.Z.); (X.X.); (Y.M.)
| | - Yaping Ma
- Key Laboratory of Quantum Matt Science, Henan Key Laboratory of Photovoltaic Materials, Henan University, Zhengzhou 450046, China
- Correspondence: (W.Z.); (X.X.); (Y.M.)
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Tanabe Y, Ito Y, Sugawara K, Jeong S, Ohto T, Nishiuchi T, Kawada N, Kimura S, Aleman CF, Takahashi T, Kotani M, Chen M. Coexistence of Urbach-Tail-Like Localized States and Metallic Conduction Channels in Nitrogen-Doped 3D Curved Graphene. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205986. [PMID: 36208073 DOI: 10.1002/adma.202205986] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/13/2022] [Indexed: 06/16/2023]
Abstract
Nitrogen (N) doping is one of the most effective approaches to tailor the chemical and physical properties of graphene. By the interplay between N dopants and 3D curvature of graphene lattices, N-doped 3D graphene displays superior performance in electrocatalysis and solar-energy harvesting for energy and environmental applications. However, the electrical transport properties and the electronic states, which are the key factors to understand the origins of the N-doping effect in 3D graphene, are still missing. The electronic properties of N-doped 3D graphene are systematically investigated by an electric-double-layer transistor method. It is demonstrated that Urbach-tail-like localized states are located around the neutral point of N-doped 3D graphene with the background metallic transport channels. The dual nature of electronic states, generated by the synergistic effect of N dopants and 3D curvature of graphene, can be the electronic origin of the high electrocatalysis, enhanced molecular adsorption, and light absorption of N-doped 3D graphene.
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Affiliation(s)
- Yoichi Tanabe
- Department of Applied Science, Okayama University of Science, Okayama, 700-0005, Japan
| | - Yoshikazu Ito
- Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
| | - Katsuaki Sugawara
- Department of Physics, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
- Center for Spintronics Research Network, Tohoku University, Sendai, 980-8577, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Tokyo, 102-0076, Japan
| | - Samuel Jeong
- Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
| | - Tatsuhiko Ohto
- Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, 560-8531, Japan
| | - Tomohiko Nishiuchi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Naoaki Kawada
- Department of Applied Science, Okayama University of Science, Okayama, 700-0005, Japan
| | - Shojiro Kimura
- Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai, 980-8577, Japan
| | | | - Takashi Takahashi
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - Motoko Kotani
- Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
- Mathematical Institute, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
| | - Mingwei Chen
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
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Low-Dimensional Nanomaterial Systems Formed by IVA Group Elements Allow Energy Conversion Materials to Flourish. NANOMATERIALS 2022; 12:nano12152521. [PMID: 35893488 PMCID: PMC9332081 DOI: 10.3390/nano12152521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 07/13/2022] [Accepted: 07/15/2022] [Indexed: 11/22/2022]
Abstract
In response to the exhaustion of traditional energy, green and efficient energy conversion has attracted growing attention. The IVA group elements, especially carbon, are widely distributed and stable in the earth’s crust, and have received a lot of attention from scientists. The low-dimensional structures composed of IVA group elements have special energy band structure and electrical properties, which allow them to show more excellent performance in the fields of energy conversion. In recent years, the diversification of synthesis and optimization of properties of IVA group elements low-dimensional nanomaterials (IVA-LD) contributed to the flourishing development of related fields. This paper reviews the properties and synthesis methods of IVA-LD for energy conversion devices, as well as their current applications in major fields such as ion battery, moisture electricity generation, and solar-driven evaporation. Finally, the prospects and challenges faced by the IVA-LD in the field of energy conversion are discussed.
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Li S, Liu M, Wang X, Ye G, Peng Y, Zhao Y, Guan S. High-Quality N-Doped Graphene with Controllable Nitrogen Bonding Configurations Derived from Ionic Liquids. Chem Asian J 2022; 17:e202200192. [PMID: 35714292 DOI: 10.1002/asia.202200192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 05/21/2022] [Indexed: 11/10/2022]
Abstract
Controllable nitrogen doping is an effective way to regulate the electronic properties of graphene and further to facilitate its wider application. However, the synthesis of high-quality nitrogen-doped graphene (NG) with a controllable nitrogen configuration still faces considerable challenges. In this work, we present for the first time a simple method for the one-step synthesis of NG with ionic liquids (ILs) as precursors, which avoids the defects introduced by secondary doping and simplifies the process. Using 1-Ethyl-3-methylimidazolium dicyanamide (EMIM-dca) as the precursor, we obtained a high-quality NG with few defects (ID /IG is 0.83), nitrogen content (4.11 at%), and graphite-N proportion of 92% at a growth temperature of 1000 °C and field effect transistors (FETs) fabricated on SiO2 /Si substrates using the NG exhibited typical n-type semiconductor behavior in air. Our findings bring more inspiration for the controllable growth of high-quality graphitic N-doped graphene, thereby promoting its application possibilities in numerous fields.
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Affiliation(s)
- Shuang Li
- Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
| | - Mincong Liu
- Department of Physics, College of Science, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
| | - Xiulian Wang
- Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
| | - Guohua Ye
- Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
| | - Yan Peng
- Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
| | - Yufeng Zhao
- Institute for Sustainable Energy, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
| | - Shiyou Guan
- Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, 200444, Shanghai, P. R. China
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Influence of Magnetic Moment on Single Atom Catalytic Activation Energy Barriers. Catal Letters 2022. [DOI: 10.1007/s10562-021-03737-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractDesign of the molecular environment of single atom catalysts (SAC) is promising for achieving high catalytic activity without expensive and scarce platinum-group metals (PGM). We utilize a first principles approach to examine how the spin state of the SAC and reactants can affect catalytic energy barriers of V, Fe, Mo, and Ta on two different graphene defects with differing magnetic moments. Spin polarized projected density of states and climbing image nudged elastic band calculations demonstrate relatively lower activation energy barriers for systems with higher spin state asymmetry near the Fermi energy; CO oxidation on Ta and V SAC have decreases in activation barrier energies of 27% and 44%, respectively.
Graphic Abstract
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Pham TT, Pham TN, Chihaia V, Vu QA, Trinh TT, Pham TT, Van Thang L, Son DN. How do the doping concentrations of N and B in graphene modify the water adsorption? RSC Adv 2021; 11:19560-19568. [PMID: 35479230 PMCID: PMC9033564 DOI: 10.1039/d1ra01506k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 05/14/2021] [Indexed: 12/17/2022] Open
Abstract
Understanding the interaction of water and graphene is crucial for various applications such as water purification, desalination, and electrocatalysis. Experimental and theoretical studies have already investigated water adsorption on N- and B-doped graphene. However, there are no reports available that elucidate the influences of the N and B doping content in graphene on the microscopic geometrical structure and the electronic properties of the adsorbed water. Thus, this work is devoted to solving this problem using self-consistent van der Waals density functional theory calculations. The N and B doping contents of 0.0, 3.1, 6.3, and 9.4% were considered. The results showed that the binding energy of water increases almost linearly as a function of doping content at all concentrations for N-doped graphene but below 6.3% for B-doped graphene. In the linear range, the binding energy increases by approximately 30 meV for each increment of the doping ratio. Analyses of the geometric and electronic structures explained the enhancement of the water-graphene interaction with the variation in doping percentage.
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Affiliation(s)
- Thi Tan Pham
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Thanh Ngoc Pham
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Viorel Chihaia
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy Splaiul Independentei 202, Sector 6 060021 Bucharest Romania
| | - Quang Anh Vu
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Thuat T Trinh
- Department of Civil and Environmental Engineering, Norwegian University of Science and Technology NO-7491 Trondheim Norway
| | - Trung Thanh Pham
- Namur Institute of Structured Matter (NISM), Department of Physics, University of Namur 61 Rue de Bruxelles B-5000 Namur Belgium
| | - Le Van Thang
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
| | - Do Ngoc Son
- Ho Chi Minh City University of Technology 268 Ly Thuong Kiet Street, Ward 14, District 10 Ho Chi Minh City Vietnam .,Vietnam National University Ho Chi Minh City Quarter 6, Linh Trung Ward, Thu Duc District Ho Chi Minh City Vietnam
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Hoque MK, Behan JA, Creel J, Lunney JG, Perova TS, Colavita PE. Reactive Plasma N-Doping of Amorphous Carbon Electrodes: Decoupling Disorder and Chemical Effects on Capacitive and Electrocatalytic Performance. Front Chem 2020; 8:593932. [PMID: 33240854 PMCID: PMC7670066 DOI: 10.3389/fchem.2020.593932] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/06/2020] [Indexed: 11/13/2022] Open
Abstract
Nitrogen-free amorphous carbon thin films prepared via sputtering followed by graphitization, were used as precursor materials for the creation of N-doped carbon electrodes with varying degrees of amorphization. Incorporation of N-sites was achieved via nitrogen plasma treatments which resulted in both surface functionalization and amorphization of the carbon electrode materials. X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy were used to monitor composition and carbon organization: results indicate incorporation of predominantly pyrrolic-N sites after relatively short treatment cycles (5 min or less), accompanied by an initial etching of amorphous regions followed by a slower process of amorphization of graphitized clusters. By leveraging the difference in the rate of these two processes it was possible to investigate the effects of chemical N-sites and C-defect sites on their electrochemical response. The materials were tested as metal-free electrocatalysts in the oxygen reduction reaction (ORR) in alkaline conditions. We find that the introduction of predominantly pyrrolic-N sites via plasma modification results in improvements in selectivity in the ORR, relative to the nitrogen-free precursor material. Introduction of defects through prolonged plasma exposure has a more pronounced and beneficial effect on ORR descriptors than introduction of N-sites alone, leading to both increased onset potentials, and reduced hydroperoxide yields relative to the nitrogen-free carbon material. Our results suggest that increased structural disorder/heterogeneity results in the introduction of carbon sites that might either serve as main activity sites, or that enhance the effects of N-functionalities in the ORR via synergistic effects.
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Affiliation(s)
- Md. Khairul Hoque
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and SFI Research Centre for Advanced Materials and BioEngineering Research (AMBER) Research Centres, School of Chemistry, Trinity College Dublin, Dublin, Ireland
| | - James A. Behan
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and SFI Research Centre for Advanced Materials and BioEngineering Research (AMBER) Research Centres, School of Chemistry, Trinity College Dublin, Dublin, Ireland
| | - James Creel
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and SFI Research Centre for Advanced Materials and BioEngineering Research (AMBER) Research Centres, School of Chemistry, Trinity College Dublin, Dublin, Ireland
| | | | - Tatiana S. Perova
- School of Engineering, Trinity College Dublin, College Green, Dublin, Ireland
| | - Paula E. Colavita
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and SFI Research Centre for Advanced Materials and BioEngineering Research (AMBER) Research Centres, School of Chemistry, Trinity College Dublin, Dublin, Ireland
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12
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Zou L, Yan P, Lu P, Chen D, Chu W, Cen W. Enhanced heterogenous hydration of SO 2 through immobilization of pyridinic-N on carbon materials. ROYAL SOCIETY OPEN SCIENCE 2020; 7:192248. [PMID: 32968503 PMCID: PMC7481677 DOI: 10.1098/rsos.192248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 07/10/2020] [Indexed: 06/11/2023]
Abstract
Carbon materials doped with nitrogen have long been used for SO2 removal from flue gases for the benefits of the environment. The role of water is generally regarded as hydration of SO3 which is formed through the oxidization of SO2. However, the hydration of SO2, especially on the surface of N-doped carbon materials, was almost ignored. In this study, the hydration of SO2 was investigated in detail on the pyridinic nitrogen (PyN)-doped graphene (GP) surfaces. It is found that, compared with the homogeneous hydration of SO2 assisted with NH3 in gas phase, the heterogeneous hydration is much more thermodynamically and kinetically favourable. Specifically, when a single H2O molecule is involved, the energy barrier for SO2 hydration is as low as 0.15 eV, with 0.59 eV released, indicating the hydration of SO2 can occur at rather low water concentration and temperature. Thermodynamic integration molecular dynamics results show the feasibility of the hydrogenated substrate recovery and the immobilized N acting as a catalytic site for SO2 hydration. Our findings show that the heterogeneous hydration of SO2 should be universal and potentially uncover the puzzling reaction mechanism for SO2 catalytic oxidation at low temperature by N-doped carbon materials.
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Affiliation(s)
- Longhua Zou
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu 610065, People's Republic of China
| | - Ping Yan
- College of Architecture and Environment, Sichuan University, Chengdu 610065, People's Republic of China
| | - Peng Lu
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Guangzhou 510655, People's Republic of China
| | - Dongyao Chen
- The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, Ministry of Ecology and Environment of China, Guangzhou 510655, People's Republic of China
| | - Wei Chu
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu 610065, People's Republic of China
| | - Wanglai Cen
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu 610065, People's Republic of China
- National Engineering Research Center for Flue Gas Desulfurization, Sichuan University, Chengdu 610065, People's Republic of China
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13
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Sun Z, Fan Q, Zhang M, Liu S, Tao H, Texter J. Supercritical Fluid-Facilitated Exfoliation and Processing of 2D Materials. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1901084. [PMID: 31572648 PMCID: PMC6760473 DOI: 10.1002/advs.201901084] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Indexed: 05/19/2023]
Abstract
Since the first intercalation of layered silicates by using supercritical CO2 as a processing medium, considerable efforts have been dedicated to intercalating and exfoliating layered two-dimensional (2D) materials in various supercritical fluids (SCFs) to yield single- and few-layer nanosheets. Here, recent work in this area is highlighted. Motivating factors for enhancing exfoliation efficiency and product quality in SCFs, mechanisms for exfoliation and dispersion in SCFs, as well as general metrics applied to assess quality and processability of exfoliated 2D materials are critically discussed. Further, advances in formation and application of 2D material-based composites with assistance from SCFs are presented. These discussions address chemical transformations accompanying SCF processing such as doping, covalent surface modification, and heterostructure formation. Promising features, challenges, and routes to expanding SCF processing techniques are described.
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Affiliation(s)
- Zhenyu Sun
- State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Qun Fan
- State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Mingli Zhang
- State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Shizhen Liu
- State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - Hengcong Tao
- State Key Laboratory of Organic–Inorganic CompositesBeijing University of Chemical TechnologyBeijing100029P. R. China
| | - John Texter
- School of Engineering TechnologyEastern Michigan UniversityYpsilantiMI48197USA
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Controlling Nitrogen Doping in Graphene with Atomic Precision: Synthesis and Characterization. NANOMATERIALS 2019; 9:nano9030425. [PMID: 30871112 PMCID: PMC6474020 DOI: 10.3390/nano9030425] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 03/06/2019] [Indexed: 12/22/2022]
Abstract
Graphene provides a unique platform for the detailed study of its dopants at the atomic level. Previously, doped materials including Si, and 0D-1D carbon nanomaterials presented difficulties in the characterization of their dopants due to gradients in their dopant concentration and agglomeration of the material itself. Graphene's two-dimensional nature allows for the detailed characterization of these dopants via spectroscopic and atomic resolution imaging techniques. Nitrogen doping of graphene has been well studied, providing insights into the dopant bonding structure, dopant-dopant interaction, and spatial segregation within a single crystal. Different configurations of nitrogen within the carbon lattice have different electronic and chemical properties, and by controlling these dopants it is possible to either n- or p-type dope graphene, grant half-metallicity, and alter nitrogen doped graphene's (NG) catalytic and sensing properties. Thus, an understanding and the ability to control different types of nitrogen doping configurations allows for the fine tuning of NG's properties. Here we review the synthesis, characterization, and properties of nitrogen dopants in NG beyond atomic dopant concentration.
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15
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Hou M, Zhang X, Yuan S, Cen W. Double graphitic-N doping for enhanced catalytic oxidation activity of carbocatalysts. Phys Chem Chem Phys 2019; 21:5481-5488. [PMID: 30783640 DOI: 10.1039/c8cp07317a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Graphitic N (GrN) doping is an effective way to promote the catalytic oxidation activities of pristine graphene, but a low doping density still limits its practical use. Based on DFT calculations, a double graphitic N (GrN) doping method is proposed. When the two GrN atoms are located at two different but nearby hexatomic rings, the dissociation of O2 molecules is significantly facilitated and the subsequently formed oxygen groups remain active for SO2 oxidation. In contrast, if the two GrN atoms are located at the same hexatomic rings of graphene, sluggish carbonyl groups will be formed in spite of the dissociation of O2 molecules being extraordinarily preferred.
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Affiliation(s)
- Meiling Hou
- College of Zhong Ran, Hebei Normal University, Shijiazhuang, 050024, P. R. China
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16
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Ma C, Sun X, Du H, Wang J, Tian M, Zhao A, Yamauchi Y, Wang B. Landau Quantization of a Narrow Doubly-Folded Wrinkle in Monolayer Graphene. NANO LETTERS 2018; 18:6710-6718. [PMID: 30354163 DOI: 10.1021/acs.nanolett.8b02243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Folding can be an effective way to tailor the electronic properties of graphene and has attracted wide study interest in finding its novel properties. Here we present the experimental characterizations of the structural and electronic properties of a narrow graphene wrinkle on a SiO2/Si substrate using scanning tunneling microscopy/spectroscopy. Pronounced and nearly equally separated conductance peaks are observed in the d I/d V spectra of the wrinkle. We attribute these peaks to pseudo-Landau levels (PLLs) that are caused by a gradient-strain-induced pseudomagnetic field up to about 42 T in the narrow wrinkle. The introduction of the gradient strain and thus the pseudomagnetic field can be ascribed to the lattice deformation. A doubly-folded structure of the wrinkle is suggested. Our density functional theory calculations show that the band structure of the doubly folded graphene wrinkle has a parabolic dispersion, which can well explain the equally separated PLLs. The effective mass of carriers is obtained to be about 0.02 me ( me: the rest mass of electron), and interestingly, it is revealed that there exists valley polarization in the wrinkle. Such properties of the strained doubly folded wrinkle may provide a platform to explore some exciting phenomena in graphene, like zero-field quantum valley Hall effect.
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Affiliation(s)
- Chuanxu Ma
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
| | - Xia Sun
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
- National Institute for Materials Science, 1-2-1 Sengen , Tsukuba , Ibaraki 305-0047 , Japan
| | - Hongjian Du
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
| | - Jufeng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
| | - Mingyang Tian
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
| | - Aidi Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
| | - Yasushi Yamauchi
- National Institute for Materials Science, 1-2-1 Sengen , Tsukuba , Ibaraki 305-0047 , Japan
| | - Bing Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information & Quantum Physics, Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS) , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , P. R. China
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