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Liu H, Chen BQ, Li CY, Fang CJ, Kankala RK, Wang SB, Chen AZ. Fluoride-Free Synthesis of 2D Titanium Carbide (MXenes) Assisted by scCO 2 -Based Ternary Solution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305321. [PMID: 37658493 DOI: 10.1002/smll.202305321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/04/2023] [Indexed: 09/03/2023]
Abstract
2D MXene-Ti3 C2 Tx holds great promise in various electronic applications, especially for electromagnetic interference (EMI) shielding devices and supercapacitors. Ti3 C2 Tx synthesis typically involves the use of hazardous fluorine-containing chemicals that can result in the formation of inert fluoride functional groups on the surface of Ti3 C2 Tx , severely degrading its properties and posing a threat to the performance of electron transfer among electrical devices. Herein, a supercritical carbon dioxide-based ternary solution (scCO2 /DMSO/HCl) to produce fluoride-free Ti3 C2 Tx in mild conditions (via 0.5 m HCl, 20 MPa, 32 °C) is reported. The fluorine-free Ti3 C2 Tx films electrode presents an excellent gravimetric capacitance of 320 F g-1 at 2 mV s-1 in 1 m H2 SO4 . Besides, it is demonstrated that fluorine-free Ti3 C2 Tx films exhibit outstanding EMI shielding efficiency of 53.12 dB at 2.5 µm thickness. The findings offer a mild and practical approach to producing fluoride-free Ti3 C2 Tx and open opportunities for exploring MXenes' potential applications in various fields.
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Affiliation(s)
- Hao Liu
- Institute of Biomaterials and Tissue Engineering and Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Biao-Qi Chen
- Institute of Biomaterials and Tissue Engineering and Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Chang-Yong Li
- Institute of Biomaterials and Tissue Engineering and Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Cun-Jiong Fang
- College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Ranjith Kumar Kankala
- Institute of Biomaterials and Tissue Engineering and Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
| | - Shi-Bin Wang
- Institute of Biomaterials and Tissue Engineering and Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
- College of Materials Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Ai-Zheng Chen
- Institute of Biomaterials and Tissue Engineering and Fujian Provincial Key Laboratory of Biochemical Technology, College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China
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2
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Liu W, Zheng X, Xu Q. Supercritical CO 2 Directional-Assisted Synthesis of Low-Dimensional Materials for Functional Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301097. [PMID: 37093220 DOI: 10.1002/smll.202301097] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/07/2023] [Indexed: 05/03/2023]
Abstract
Supercritical CO2 (SC CO2 ), as one of the unique fluids that possess fascinating properties of gas and liquid, holds great promise in chemical reactions and fabrication of materials. Building special nanostructures via SC CO2 for functional applications has been the focus of intense research for the past two decades, with facile regulated reaction conditions and a particular reaction field to operate compared to the more widely used solvent systems. In this review, the significance of SC CO2 on fabricating various functional materials including modification of 1D carbon nanotubes, 2D materials, and 2D heterostructures is stated. The fundamental aspects involving building special nanostructures via SC CO2 are explored: how their structure, morphology, and chemical composition be affected by the SC CO2 . Various optimization strategies are outlined to improve their performances, and recent advances are combined to present a coherent understanding of the mechanism of SC CO2 acting on these functional nanostructures. The wide applications of these special nanostructures in catalysis, biosensing, optoelectronics, microelectronics, and energy transformation are discussed. Moreover, the current status of SC CO2 research, the existing scientific issues, and application challenges, as well as the possible future directions to advance this fertile field are proposed in this review.
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Affiliation(s)
- Wei Liu
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, P. R. China
| | - Xiaoli Zheng
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Qun Xu
- Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, P. R. China
- College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
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3
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Tang S, Ma Y, Wang H, Liang Y, Xu X, Zhang D, Cao B, Wang Q, Li W. One-Pot Synthesis of 2D-2D WO 3 /g-C 3 N 4 Photocatalyst in Reverse Microemulsion System via Supercritical CO 2 for Enhanced Hydrogen Generation. CHEMSUSCHEM 2023; 16:e202202184. [PMID: 36814358 DOI: 10.1002/cssc.202202184] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/22/2023] [Indexed: 06/10/2023]
Abstract
Construction of Z-scheme photocatalyst is an effective approach for using solar energy to produce hydrogen during water splitting. Herein, 2D/2D WO3 /g-C3 N4 heterojunction photocatalyst was synthesized by a convenient and green method including exfoliation and heterojunction procedures, in the reverse microemulsion system via supercritical carbon dioxide (scCO2 ). The resultant W/CN-10.3 composite exhibited enhanced photocatalytic activities towards the hydrogen evolution during water splitting with a hydrogen evolution rate of 688.51 μmol g-1 h-1 , which was more than 16 times higher than bulk g-C3 N4 with the same loading amount of Pt as cocatalyst. Due to its effective separation of photogenerated carriers and prolonged lifetime, more photoexcited electrons with high reduction ability could contribute to the production of H2 . Possible formation mechanism of 2D-2D WO3 /g-C3 N4 nanosheets via scCO2 in the reverse microemulsion system by the one-pot method has been proposed. This work provides an efficient and green strategy to synthesize 2D-2D heterojunction for the utilization in solar-to-fuel conversion.
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Affiliation(s)
- Shaoru Tang
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Yanan Ma
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Haimeng Wang
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Yuxuan Liang
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Xiaoyang Xu
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Dingyu Zhang
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Beiming Cao
- School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China
| | - Qian Wang
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
| | - Wei Li
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China
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4
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Marinov AD, Bravo Priegue L, Shah AR, Miller TS, Howard CA, Hinds G, Shearing PR, Cullen PL, Brett DJL. Ex Situ Characterization of 1T/2H MoS 2 and Their Carbon Composites for Energy Applications, a Review. ACS NANO 2023; 17:5163-5186. [PMID: 36926849 PMCID: PMC10062033 DOI: 10.1021/acsnano.2c08913] [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: 09/06/2022] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
The growing interest in the development of next-generation net zero energy systems has led to the expansion of molybdenum disulfide (MoS2) research in this area. This activity has resulted in a wide range of manufacturing/synthesis methods, controllable morphologies, diverse carbonaceous composite structures, a multitude of applicable characterization techniques, and multiple energy applications for MoS2. To assess the literature trends, 37,347 MoS2 research articles from Web of Science were text scanned to classify articles according to energy application research and characterization techniques employed. Within the review, characterization techniques are grouped under the following categories: morphology, crystal structure, composition, and chemistry. The most common characterization techniques identified through text scanning are recommended as the base fingerprint for MoS2 samples. These include: scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Similarly, XPS and Raman spectroscopy are suggested for 2H or 1T MoS2 phase confirmation. We provide guidance on the collection and presentation of MoS2 characterization data. This includes how to effectively combine multiple characterization techniques, considering the sample area probed by each technique and their statistical significance, and the benefit of using reference samples. For ease of access for future experimental comparison, key numeric MoS2 characterization values are tabulated and major literature discrepancies or currently debated characterization disputes are highlighted.
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Affiliation(s)
- Alexandar D Marinov
- Electrochemical Innovation Laboratory (EIL), Department of Chemical Engineering, University College London (UCL), Gower Street, London WC1E 6BT, U.K
| | | | - Ami R Shah
- Electrochemical Innovation Laboratory (EIL), Department of Chemical Engineering, University College London (UCL), Gower Street, London WC1E 6BT, U.K
| | - Thomas S Miller
- Electrochemical Innovation Laboratory (EIL), Department of Chemical Engineering, University College London (UCL), Gower Street, London WC1E 6BT, U.K
| | - Christopher A Howard
- Department of Physics & Astronomy, University College London (UCL), Gower Street, London WC1E 6BT, U.K
| | - Gareth Hinds
- National Physical Laboratory, Hampton Road, Teddington TW11 0LW, U.K
| | - Paul R Shearing
- Electrochemical Innovation Laboratory (EIL), Department of Chemical Engineering, University College London (UCL), Gower Street, London WC1E 6BT, U.K
| | - Patrick L Cullen
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
| | - Dan J L Brett
- Electrochemical Innovation Laboratory (EIL), Department of Chemical Engineering, University College London (UCL), Gower Street, London WC1E 6BT, U.K
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5
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Chang H, Zhou Y, Zheng X, Liu W, Xu Q. Single‐Layer 2D Ni−BDC MOF Obtained in Supercritical CO
2
‐Assisted Aqueous Solution. Chemistry 2022; 28:e202201811. [DOI: 10.1002/chem.202201811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Hongwei Chang
- College of Materials Science and Engineering Zhengzhou University 100, Science Avenue, Zhengzhou Henan Province P. R. China
| | - Yannan Zhou
- College of Materials Science and Engineering Zhengzhou University 100, Science Avenue, Zhengzhou Henan Province P. R. China
| | - Xiaoli Zheng
- College of Materials Science and Engineering Zhengzhou University 100, Science Avenue, Zhengzhou Henan Province P. R. China
| | - Wei Liu
- Henan Institute of Advanced Technology Zhengzhou University Zhengzhou 450052 P. R. China
| | - Qun Xu
- College of Materials Science and Engineering Zhengzhou University 100, Science Avenue, Zhengzhou Henan Province P. R. China
- Henan Institute of Advanced Technology Zhengzhou University Zhengzhou 450052 P. R. China
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6
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Zhu H, Wang Q, Zhang Y, Yin J. Supercritical CO2 microemulsion containing [Emim][Tf2N] coupled jet impact exfoliation of graphene and its application to supercapacitors. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Angizi S, Yu EYC, Dalmieda J, Saha D, Selvaganapathy PR, Kruse P. Defect Engineering of Graphene to Modulate pH Response of Graphene Devices. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:12163-12178. [PMID: 34624190 DOI: 10.1021/acs.langmuir.1c02088] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Graphene-based pH sensors are a robust, durable, sensitive, and scalable approach for the sensitive detection of pH in various environments. However, the mechanisms through which graphene responds to pH variations are not well-understood yet. This study provides a new look into the surface science of graphene-based pH sensors to address the existing gaps and inconsistencies among the literature concerning sensing response, the role of defects, and surface/solution interactions. Herein, we demonstrate the dependence of the sensing response on the defect density level of graphene, measured by Raman spectroscopy. At the crossover point (ID/IG = 0.35), two countervailing mechanisms balance each other out, separating two regions where either a surface defect induced (negative slope) or a double layer induced (positive slope) response dominates. For ratios above 0.35, the pH-dependent induction of charges at surface functional groups (both pH-sensitive and nonsensitive groups) dominates the device response. Below a ratio of 0.35, the response is dominated by the modulation of charge carriers in the graphene due to the electric double layer formed from the interaction between the graphene surface and the electrolyte solution. Selective functionalization of the surface was utilized to uncover the dominant acid-base interactions of carboxyl and amine groups at low pH while hydroxyl groups control the high pH range sensitivity. The overall pH-sensing characteristics of the graphene will be determined by the balance of these two mechanisms.
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Affiliation(s)
- Shayan Angizi
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1 Canada
| | - Eugene Yat Chun Yu
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1 Canada
| | - Johnson Dalmieda
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1 Canada
| | - Dipankar Saha
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1 Canada
| | - P Ravi Selvaganapathy
- Department of Mechanical Engineering, McMaster University, Hamilton, L8S 4M1, Canada
| | - Peter Kruse
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1 Canada
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8
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Meziani MJ, Sheriff K, Parajuli P, Priego P, Bhattacharya S, Rao AM, Quimby JL, Qiao R, Wang P, Hwu SJ, Wang Z, Sun YP. Advances in Studies of Boron Nitride Nanosheets and Nanocomposites for Thermal Transport and Related Applications. Chemphyschem 2021; 23:e202100645. [PMID: 34626067 DOI: 10.1002/cphc.202100645] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 09/30/2021] [Indexed: 01/10/2023]
Abstract
Hexagonal boron nitride (h-BN) and exfoliated nanosheets (BNNs) not only resemble their carbon counterparts graphite and graphene nanosheets in structural configurations and many excellent materials characteristics, especially the ultra-high thermal conductivity, but also offer other unique properties such as being electrically insulating and extreme chemical stability and oxidation resistance even at elevated temperatures. In fact, BNNs as a special class of 2-D nanomaterials have been widely pursued for technological applications that are beyond the reach of their carbon counterparts. Highlighted in this article are significant recent advances in the development of more effective and efficient exfoliation techniques for high-quality BNNs, the understanding of their characteristic properties, and the use of BNNs in polymeric nanocomposites for thermally conductive yet electrically insulating materials and systems. Major challenges and opportunities for further advances in the relevant research field are also discussed.
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Affiliation(s)
- Mohammed J Meziani
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA.,Department of Natural Sciences, Northwest Missouri State University, Maryville, Missouri, 64468, USA
| | - Kirkland Sheriff
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
| | - Prakash Parajuli
- Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University, Clemson, South Carolina, 29634, USA
| | - Paul Priego
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
| | - Sriparna Bhattacharya
- Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University, Clemson, South Carolina, 29634, USA
| | - Apparao M Rao
- Department of Physics and Astronomy, Clemson Nanomaterials Institute, Clemson University, Clemson, South Carolina, 29634, USA
| | - Jesse L Quimby
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
| | - Rui Qiao
- Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061, USA
| | - Ping Wang
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
| | - Shiou-Jyh Hwu
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
| | - Zhengdong Wang
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
| | - Ya-Ping Sun
- Department of Chemistry, Clemson University, Clemson, South Carolina, 29634, USA
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9
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Two-Dimensional MFI Zeolite Nanosheets Exfoliated by Surfactant Assisted Solution Process. NANOMATERIALS 2021; 11:nano11092327. [PMID: 34578643 PMCID: PMC8472291 DOI: 10.3390/nano11092327] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022]
Abstract
Two-dimensional (2D) zeolite nanosheets are important for the synthesis of high flux zeolite membranes due to their lateral size in a preferred orientation. A way to obtain 2D zeolite nanosheets is to exfoliate interlocked structures generated during the hydrothermal synthesis. The mechanical and polymer assisted exfoliation process leads to mechanical damage in nanosheets and short lateral size. In the present study, polyvinylpyrrolidone (PVP) was introduced as an exfoliation agent and dispersant, so that multilamellar interlocked silicalite-1 zeolite nanosheets successfully exfoliated into a large lateral size (individual nanosheets 500~1200 nm). The good exfoliation behavior was due to the strong penetration of PVP into multilamellar nanosheets. Sonication assisted by mild milling helps PVP molecules to penetrate through the lamellar structure, contributing to the expansion of the distance between adjacent layers and thus decreasing the interactions between each layer. In addition, the stability of exfoliated nanosheets was evaluated with a series of organic solvents. The exfoliated nanosheets were well dispersed in n-butanol and stable for 30 days. Therefore, the PVP-assisted solution-based exfoliation process provides high aspect ratio MFI zeolite nanosheets in organic solvents for a long period.
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10
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Le TH, Oh Y, Kim H, Yoon H. Exfoliation of 2D Materials for Energy and Environmental Applications. Chemistry 2020; 26:6360-6401. [PMID: 32162404 DOI: 10.1002/chem.202000223] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Indexed: 12/20/2022]
Abstract
The fascinating properties of single-layer graphene isolated by mechanical exfoliation have inspired extensive research efforts toward two-dimensional (2D) materials. Layered compounds serve as precursors for atomically thin 2D materials (briefly, 2D nanomaterials) owing to their strong intraplane chemical bonding but weak interplane van der Waals interactions. There are newly emerging 2D materials beyond graphene, and it is becoming increasingly important to develop cost-effective, scalable methods for producing 2D nanomaterials with controlled microstructures and properties. The variety of developed synthetic techniques can be categorized into two classes: bottom-up and top-down approaches. Of top-down approaches, the exfoliation of bulk 2D materials into single or few layers is the most common. This review highlights chemical and physical exfoliation methods that allow for the production of 2D nanomaterials in large quantities. In addition, remarkable examples of utilizing exfoliated 2D nanomaterials in energy and environmental applications are introduced.
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Affiliation(s)
- Thanh-Hai Le
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Yuree Oh
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Hyungwoo Kim
- Alan G. MacDiarmid Energy Research &, School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea.,Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
| | - Hyeonseok Yoon
- Alan G. MacDiarmid Energy Research &, School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea.,Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, South Korea
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11
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Xu QQ, Zhi JT, Zhu HY, Qi JL, Yin JZ, Wang ZG, Wang QB. The production of graphene using impinging jet exfoliation in a binary system of CO 2 and N-methyl pyrrolidone. NANOTECHNOLOGY 2020; 31:265601. [PMID: 32163939 DOI: 10.1088/1361-6528/ab7f7c] [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
High quality and high quantity few-layer graphene was successfully prepared using a new impinging jet method. Natural graphite flakes were first agitated in N-methyl pyrrolidone (NMP) with the assistance of supercritical CO2, then the half-exfoliated graphite was further stripped using the shear stress derived from the impinging jets. After the energy conversion and stress analysis of the graphite particles during the whole exfoliation process, it was revealed that the size of the target mesh, the distance between the nozzle and the target, the decompression rate, and the size of the raw materials had a significant influence on the exfoliation process. Additionally, a microscopic view of the exfoliation and dispersion mechanism of graphene in the CO2-NMP system was investigated using molecular dynamics simulation, and CO2 was found to be beneficial for the penetration of NMP into the graphite sheets. Finally, the concentration and quality characteristics of the prepared graphene were characterized using ultraviolet-visible spectroscopy, transmission electron microscopy, Raman spectroscopy, and atomic force microscopy. The maximum concentration was as high as 0.689 mg ml-1, the thickness of 68% of the product was less than 2.5 nm, and the lateral dimension was from 0.5 to 3.0 μm. These results indicate that this impinging jet method is promising for large-scale industrial production.
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Affiliation(s)
- Qin-Qin Xu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China
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12
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Liu W, Xu Q, Zhou Y. CO 2-assisted fabrication of two-dimensional amorphous transition metal oxides. Dalton Trans 2020; 49:2048-2052. [PMID: 31989128 DOI: 10.1039/c9dt04651h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This Frontier presents the recent developments and applications of two-dimensional (2D) amorphous transition metal oxides (TMOs) obtained by using supercritical CO2. CO2 molecules can affect the crystal transformation of layered materials and allow diffusive atomic disordering during the exfoliation process. If amorphous structures are introduced into TMOs, the strong localization tail states that exist in the band gap of TMOs can effectively promote chemical reactions. We also discuss the future challenges to be overcome for this class of supercritical CO2 and 2D amorphous materials.
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Affiliation(s)
- Wei Liu
- College of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450052, P.R.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: 35] [Impact Index Per Article: 7.0] [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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14
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Zhang Y, Wen L, Bai X, Song N, Huang X, Li Y. A New Strategy for Preparing Two-dimensional Nanomaterials by Exfoliating LDH Using Supercritical Ethanol. CHEM LETT 2019. [DOI: 10.1246/cl.190437] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yue Zhang
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi 030006, P. R. China
- Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan, Shanxi 030006, P. R. China
| | - Liang Wen
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi 030006, P. R. China
- Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan, Shanxi 030006, P. R. China
| | - Xueli Bai
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi 030006, P. R. China
- Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan, Shanxi 030006, P. R. China
| | - Nianze Song
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi 030006, P. R. China
- Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan, Shanxi 030006, P. R. China
| | - Xin Huang
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi 030006, P. R. China
- Engineering Research Center of Ministry of Education for Fine Chemicals, Taiyuan, Shanxi 030006, P. R. China
| | - Yifei Li
- Institute of Environmental Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, P. R. China
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15
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Sakaki M, Feng YQ, Kajiyoshi K. Ultrasonic-assisted exfoliation of Ca2Nb3O10− nano-sheets. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.06.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Sheng W, Li W, Yu B, Li B, Jordan R, Jia X, Zhou F. Mussel‐Inspired Two‐Dimensional Freestanding Alkyl‐Polydopamine Janus Nanosheets. Angew Chem Int Ed Engl 2019; 58:12018-12022. [DOI: 10.1002/anie.201903527] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/12/2019] [Indexed: 01/09/2023]
Affiliation(s)
- Wenbo Sheng
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
- Chair of Macromolecular ChemistryFaculty of Chemistry and Food ChemistrySchool of ScienceTechnische Universität Dresden Mommsenstraße 4 01069 Dresden Germany
- School of Chemistry and Chemical EngineeringShihezi University 832003 Shihezi China
| | - Wei Li
- Chair of Macromolecular ChemistryFaculty of Chemistry and Food ChemistrySchool of ScienceTechnische Universität Dresden Mommsenstraße 4 01069 Dresden Germany
- School of Chemistry and Chemical EngineeringShihezi University 832003 Shihezi China
| | - Bo Yu
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
| | - Bin Li
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
- Current address: Physik Department, TUM—Technische Universität München James-Franck-Straße 1 85748 Garching Germany
| | - Rainer Jordan
- Chair of Macromolecular ChemistryFaculty of Chemistry and Food ChemistrySchool of ScienceTechnische Universität Dresden Mommsenstraße 4 01069 Dresden Germany
| | - Xin Jia
- School of Chemistry and Chemical EngineeringShihezi University 832003 Shihezi China
| | - Feng Zhou
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
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17
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Sheng W, Li W, Yu B, Li B, Jordan R, Jia X, Zhou F. Mussel‐Inspired Two‐Dimensional Freestanding Alkyl‐Polydopamine Janus Nanosheets. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Wenbo Sheng
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
- Chair of Macromolecular ChemistryFaculty of Chemistry and Food ChemistrySchool of ScienceTechnische Universität Dresden Mommsenstraße 4 01069 Dresden Germany
- School of Chemistry and Chemical EngineeringShihezi University 832003 Shihezi China
| | - Wei Li
- Chair of Macromolecular ChemistryFaculty of Chemistry and Food ChemistrySchool of ScienceTechnische Universität Dresden Mommsenstraße 4 01069 Dresden Germany
- School of Chemistry and Chemical EngineeringShihezi University 832003 Shihezi China
| | - Bo Yu
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
| | - Bin Li
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
- Current address: Physik Department, TUM—Technische Universität München James-Franck-Straße 1 85748 Garching Germany
| | - Rainer Jordan
- Chair of Macromolecular ChemistryFaculty of Chemistry and Food ChemistrySchool of ScienceTechnische Universität Dresden Mommsenstraße 4 01069 Dresden Germany
| | - Xin Jia
- School of Chemistry and Chemical EngineeringShihezi University 832003 Shihezi China
| | - Feng Zhou
- State Key Laboratory of Solid LubricationLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Tianshui middle road 18 Lanzhou 730000 China
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18
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He J, Hu L, Li D, Zhu Y, Xu L, Liu X, Li Q. Structures and Brønsted acidity features for titanoniobates with different laminate composition. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Avasthi I, Kulkarni MM, Verma S. Exfoliating a Cd II -Purine Framework: Conversion of Nanosheets-to-Nanofibers and Studies of Elastic and Capacitive Properties. Chemistry 2019; 25:6988-6995. [PMID: 30892754 DOI: 10.1002/chem.201900541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Indexed: 12/25/2022]
Abstract
Layered bulk crystals are amenable to exfoliation to yield 2D nanosheets through isolation and intercalation processes, which could be further converted to 1D nanoscale structures. The latter inherit gross morphological and physical properties associated with the precursor structures. Herein, we report three purine-based crystal structures 1, 2, and 3, where 3 is obtained by a single-crystal-to-single-crystal transformation from 2 and is a conformational polymorph of 1. Next, we describe the sonication-assisted liquid exfoliation of 1, a CdII -purine coordination framework, into nanosheets and nanofibers in a solvent-dependent process. The exfoliation was carefully studied at low temperatures to ascertain this unique conversion. This work also features the determination of the Young's modulus and surface potential of the bioinspired CdII -based nanostructures by using amplitude modulation-frequency modulation atomic force microscopy and Kelvin probe force microscopy, respectively, revealing their interesting elastic and capacitive properties for their possible use in electronics and energy devices. Electron impedance spectroscopy measurements further established a higher value of capacitance for the exfoliated CdII framework as compared to the ligand alone.
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Affiliation(s)
- Ilesha Avasthi
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
| | - Manish M Kulkarni
- Centre for Nanoscience, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
| | - Sandeep Verma
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India.,Centre for Nanoscience, Indian Institute of Technology Kanpur, Kanpur, 208016, UP, India
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20
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Deshmukh G, Krishnamoorthy K. Conversion of curved assemblies into two dimensional sheets. NANOSCALE 2019; 11:5732-5736. [PMID: 30865738 DOI: 10.1039/c8nr09915d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The design and preparation of organic two dimensional (O2D) sheets and their conversion to curved nanostructures is in its infancy. To convert a flat structure into a curved structure, the molecule must have multiple interaction possibilities and an in-built twist. The conjugated small molecule iso-Indigo (i-Indigo) comprises two phenyl rings that are twisted (the dihedral angle is 15°) at the junction. The i-Indigo has been connected with moieties that impart hydrogen bonding and van der Waals interactions. Due to the presence of the π cloud in i-Indigo, π-π interactions are also present in the molecule. While all three interactions are in operation, rings and toroids are formed. Upon addition of hydrogen bonding competing solvents, the rings and toroids unravel to form O2D sheets. Control molecules that don't have hydrogen bonding moieties and π-π interactions form random assemblies. Please note that the rings, toroids and O2D sheets are formed in a single solvent by simple dissolution, unlike previous approaches that involve multiple steps and solvents.
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Affiliation(s)
- Gunvant Deshmukh
- Polymers and Advanced Materials Laboratory, CSIR-National Chemical Laboratory, Pune 411008, India.
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21
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Zhang J, Lin X, Xue D, Xu B, Long D, Xue F, Duan X, Ye W, Wang M, Li Q. A generalized strategy for the synthesis of two-dimensional metal oxide nanosheets based on a thermoregulated phase transition. NANOSCALE 2019; 11:3200-3207. [PMID: 30702116 DOI: 10.1039/c8nr09326a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two-dimensional (2D) metal oxide (MO) nanomaterials, like graphene, possess unique electrical, mechanical, optical and catalytic performances, and have attracted substantial research interest recently. However, it remains a challenge to easily obtain 2D MO nanosheets by a generalized synthetic pathway. Here, we report a general and facile strategy for the synthesis of 2D MO nanosheets induced by nonionic surfactant micelles. Notably, the novel strategy primarily relies on the thermoregulated phase transition of the micelles. The resulting 2D MO nanosheets show high specific surface areas. As a demonstration, Sb2O3 nanosheets synthesized by our method as anodes for sodium-ion batteries (SIBs) have a high reversible capacity of 420 mA h g-1 and a high capacity retention of 99% after 150 cycles at 0.1 A g-1. Mn3O4 nanosheets for supercapacitors have a remarkable specific capacitance of 127 F g-1 at a current density of 0.5 A g-1. Even at a large current density of 5 A g-1 after 10 000 cycles, 96% of the specific capacitance is retained, demonstrating the remarkable performance of these nanosheets for energy storage applications.
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Affiliation(s)
- Jianmin Zhang
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China.
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22
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Liu W, Xu Q. CO 2 -Assisted Conversion of Crystal Two-Dimensional Molybdenum Oxide to Amorphism with Plasmon Resonances. Chemistry 2018; 24:13693-13700. [PMID: 29676819 DOI: 10.1002/chem.201801055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 04/12/2018] [Indexed: 11/08/2022]
Abstract
Localized surface plasmon resonances (LSPRs) of ultra-thin two-dimensional (2D) nanomaterials have opened up a new regime in plasmonics in the last several years. 2D plasmonic materials are currently concentrated on the crystal structure, with amorphous materials hardly being reported because of their limited preparation methods rather than undesired plasmonic properties. Taking molybdenum oxides as an example, herein, we elaborate the 2D amorphous plasmons prepared with the assistance of supercritical CO2 . In brief, we examine the reported characteristic plasmonic properties of molybdenum oxides, and applications of supercritical CO2 in formations of 2D layer materials as well as introduced phase and disorder engineering based on our research. Furthermore, we propose our perspective on the development of 2D plasmons, especially for amorphous layer materials in the future.
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Affiliation(s)
- Wei Liu
- College of Materials Science & Engineering, Zhengzhou University, Zhengzhou, 450052, P. R. China
| | - Qun Xu
- College of Materials Science & Engineering, Zhengzhou University, Zhengzhou, 450052, P. R. China
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23
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Tao H, Zhang Y, Gao Y, Sun Z, Yan C, Texter J. Scalable exfoliation and dispersion of two-dimensional materials - an update. Phys Chem Chem Phys 2018; 19:921-960. [PMID: 27976772 DOI: 10.1039/c6cp06813h] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The preparation of dispersions of single- and few-sheet 2D materials in various solvents, as well as the characterization methods applied to such dispersions, is critically reviewed. Motivating factors for producing single- and few-sheet dispersions of 2D materials in liquids are briefly discussed. Many practical applications are expected for such materials that do not require high purity formulations and tight control of donor and acceptor concentrations, as required in conventional Fab processing of semiconductor chips. Approaches and challenges encountered in exfoliating 2D materials in liquids are reviewed. Ultrasonication, mechanical shearing, and electrochemical processing approaches are discussed, and their respective limitations and promising features are critiqued. Supercritical and more conventional liquid and solvent processing are then discussed in detail. The effects of various types of stabilizers, including surfactants and other amphiphiles, as well as polymers, including homopolymeric electrolytes, nonionic polymers, and nanolatexes, are discussed. Consideration of apparent successes of stabilizer-free dispersions indicates that extensive exfoliation in the absence of dispersing aids results from processing-induced surface modifications that promote stabilization of 2D material/solvent interactions. Also apparent paradoxes in "pristineness" and optical extinctions in dispersions suggest that there is much we do not yet quantitatively understand about the surface chemistry of these materials. Another paradox, emanating from modeling dilute solvent-only exfoliation by sonication using polar components of solubility parameters and surface tension for pristine graphene with no polar structural component, is addressed. This apparent paradox appears to be resolved by realizing that the reactivity of graphene to addition reactions of solvent radicals produced by sonolysis is accompanied by unintended polar surface modifications that promote attractive interactions with solvent. This hypothesis serves to define important theoretical and experimental studies that are needed. We conclude that the greatest promise for high volume and high concentration processing lies in applying methods that have not yet been extensively reported, particularly wet comminution processing using small grinding media of various types.
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Affiliation(s)
- Hengcong Tao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Yuqin Zhang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Yunnan Gao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Zhenyu Sun
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Chao Yan
- School of Material Science & Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
| | - John Texter
- School of Engineering Technology, Eastern Michigan University, Ypsilanti, MI 48197, USA.
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24
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Dahanayake D, Gunasekara S, Jayaweera V, Sandaruwan C, Karunarathne V, Amaratunga GAJ. Atomic scale study for the structural transformation of single layered MoS2. CrystEngComm 2018. [DOI: 10.1039/c8ce01136b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural transformation of single and few layered molybdenum disulfide (MoS2) from 2H to 1T phase was studied at the atomic scale.
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Affiliation(s)
- Damayanthi Dahanayake
- Sri Lanka Institute of Nanotechnology
- Homagama
- Sri Lanka
- Postgraduate Institute of Science
- University of Peradeniya
| | | | | | | | - Veranja Karunarathne
- Sri Lanka Institute of Nanotechnology
- Homagama
- Sri Lanka
- Department of Chemistry
- Faculty of Science
| | - Gehan A. J. Amaratunga
- Sri Lanka Institute of Nanotechnology
- Homagama
- Sri Lanka
- Electrical Engineering Division, Department of Engineering
- University of Cambridge
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25
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Liu W, Xu Q, Cui W, Zhu C, Qi Y. CO
2
‐Assisted Fabrication of Two‐Dimensional Amorphous Molybdenum Oxide Nanosheets for Enhanced Plasmon Resonances. Angew Chem Int Ed Engl 2017; 56:1600-1604. [DOI: 10.1002/anie.201610708] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Wei Liu
- College of Materials Science and EngineeringZhengzhou University Zhengzhou 450052 China
| | - Qun Xu
- College of Materials Science and EngineeringZhengzhou University Zhengzhou 450052 China
| | - Weili Cui
- College of Materials Science and EngineeringZhengzhou University Zhengzhou 450052 China
| | - Chuanhui Zhu
- College of Materials Science and EngineeringZhengzhou University Zhengzhou 450052 China
| | - Yuhang Qi
- College of Materials Science and EngineeringZhengzhou University Zhengzhou 450052 China
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26
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Liu W, Xu Q, Cui W, Zhu C, Qi Y. CO2-Assisted Fabrication of Two-Dimensional Amorphous Molybdenum Oxide Nanosheets for Enhanced Plasmon Resonances. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201610708] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wei Liu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Qun Xu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Weili Cui
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Chuanhui Zhu
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
| | - Yuhang Qi
- College of Materials Science and Engineering; Zhengzhou University; Zhengzhou 450052 China
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27
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Pan L, Liu YT, Xie XM, Ye XY. Facile and Green Production of Impurity-Free Aqueous Solutions of WS 2 Nanosheets by Direct Exfoliation in Water. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:6703-6713. [PMID: 27712031 DOI: 10.1002/smll.201601804] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 08/01/2016] [Indexed: 06/06/2023]
Abstract
To obtain 2D materials with large quantity, low cost, and little pollution, liquid-phase exfoliation of their bulk form in water is a particularly fascinating concept. However, the current strategies for water-borne exfoliation exclusively employ stabilizers, such as surfactants, polymers, or inorganic salts, to minimize the extremely high surface energy of these nanosheets and stabilize them by steric repulsion. It is worth noting, however, that the remaining impurities inevitably bring about adverse effects to the ultimate performances of 2D materials. Here, a facile and green route to large-scale production of impurity-free aqueous solutions of WS2 nanosheets is reported by direct exfoliation in water. Crucial parameters such as initial concentration, sonication time, centrifugation speed, and centrifugation time are systematically evaluated to screen out an optimized condition for scaling up. Statistics based on morphological characterization prove that substantial fraction (66%) of the obtained WS2 nanosheets are one to five layers. X-ray diffraction and Raman characterizations reveal a high quality with few, if any, structural distortions. The water-borne exfoliation route opens up new opportunities for easy, clean processing of WS2 -based film devices that may shine in the fields of, e.g., energy storage and functional nanocomposites owing to their excellent electrochemical, mechanical, and thermal properties.
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Affiliation(s)
- Long Pan
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yi-Tao Liu
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
| | - Xu-Ming Xie
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Xiong-Ying Ye
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing, 100084, China
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28
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Bai W, Jiang Z, Ribbe AE, Thayumanavan S. Smart Organic Two-Dimensional Materials Based on a Rational Combination of Non-covalent Interactions. Angew Chem Int Ed Engl 2016; 55:10707-11. [PMID: 27490155 PMCID: PMC5154734 DOI: 10.1002/anie.201605050] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Indexed: 01/24/2023]
Abstract
Rational design of organic 2D (O2D) materials has made some progress, but it is still in its infancy. A class of self-assembling small molecules is presented that form nano/microscale supramolecular 2D materials in aqueous media. A judicial combination of four different intermolecular interactions forms the basis for the robust formation of these ultrathin assemblies. These assemblies can be programmed to disassemble in response to a specific protein and release its non-covalently bound guest molecules.
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Affiliation(s)
- Wei Bai
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Ziwen Jiang
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Alexander E Ribbe
- Department of Polymer Science and Engineering, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - S Thayumanavan
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA.
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29
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Liu C, Zhang J, Zheng L, Zhang J, Sang X, Kang X, Zhang B, Luo T, Tan X, Han B. Metal-Organic Framework for Emulsifying Carbon Dioxide and Water. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chengcheng Liu
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Jianling Zhang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility (BSRF); Institute of High Energy Physics; Chinese Academy of Sciences; China
| | - Jing Zhang
- Beijing Synchrotron Radiation Facility (BSRF); Institute of High Energy Physics; Chinese Academy of Sciences; China
| | - Xinxin Sang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Xinchen Kang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Bingxing Zhang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Tian Luo
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Xiuniang Tan
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
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30
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Liu C, Zhang J, Zheng L, Zhang J, Sang X, Kang X, Zhang B, Luo T, Tan X, Han B. Metal-Organic Framework for Emulsifying Carbon Dioxide and Water. Angew Chem Int Ed Engl 2016; 55:11372-6. [DOI: 10.1002/anie.201602150] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/28/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Chengcheng Liu
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Jianling Zhang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility (BSRF); Institute of High Energy Physics; Chinese Academy of Sciences; China
| | - Jing Zhang
- Beijing Synchrotron Radiation Facility (BSRF); Institute of High Energy Physics; Chinese Academy of Sciences; China
| | - Xinxin Sang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Xinchen Kang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Bingxing Zhang
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Tian Luo
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Xiuniang Tan
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
| | - Buxing Han
- Beijing National Laboratory for Molecular Sciences; CAS Key Laboratory of Colloid and Interface and Thermodynamics; Institute of Chemistry; Chinese Academy of Sciences; University of Chinese Academy of Sciences; China
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31
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Smart Organic Two-Dimensional Materials Based on a Rational Combination of Non-covalent Interactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605050] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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