1
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CO2 metallothermic conversion to valuable nanocarbons by mixed Mg/Ca reductant. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Marin D, Marchesan S. Carbon Graphitization: Towards Greener Alternatives to Develop Nanomaterials for Targeted Drug Delivery. Biomedicines 2022; 10:biomedicines10061320. [PMID: 35740342 PMCID: PMC9220131 DOI: 10.3390/biomedicines10061320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 11/16/2022] Open
Abstract
Carbon nanomaterials have attracted great interest for their unique physico-chemical properties for various applications, including medicine and, in particular, drug delivery, to solve the most challenging unmet clinical needs. Graphitization is a process that has become very popular for their production or modification. However, traditional conditions are energy-demanding; thus, recent efforts have been devoted to the development of greener routes that require lower temperatures or that use waste or byproducts as a carbon source in order to be more sustainable. In this concise review, we analyze the progress made in the last five years in this area, as well as in their development as drug delivery agents, focusing on active targeting, and conclude with a perspective on the future of the field.
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Dlamini N, Mukaya HE, Nkazi D. Carbon-based nanomaterials production from environmental pollutant byproducts: A Review. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.101953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Kim GM, Lim WG, Kang D, Park JH, Lee H, Lee J, Lee JW. Transformation of carbon dioxide into carbon nanotubes for enhanced ion transport and energy storage. NANOSCALE 2020; 12:7822-7833. [PMID: 32219284 DOI: 10.1039/c9nr10552b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The synthesis of carbon nanotubes (CNTs) from CO2 is an attractive strategy to reduce CO2 emission, but involves extreme reaction conditions and has low scalability. This work introduces continuous chemical vapor deposition for the conversion of CO2 to CNTs using the NaBH4 reductant and NiCl2 catalyst. Multi-walled CNT fibers were synthesized from gaseous CO2 under mild conditions (500-700 °C and 1 atm). Based on in situ analyses, the proposed mechanism behind the formation of CO2-derived CNTs (CCNTs) is CO2 activation and subsequent hydroboration for the generation of methane, which can induce the growth of CCNTs on the catalyst. Their intrinsic properties give rise to an enhanced capacitive performance. The boron and oxygen of CCNTs provide a pseudo-capacitance of 302 F g-1 at a low charging rate of 0.1 A g-1 in 1 M TEABF4/acetonitrile. The mesoporous networks between CCNT fibers enhance ion transport at a high current density of 205 A g-1, leading to an outstanding energy density of 13 W h kg-1 at a high power density of 115 kW kg-1. A well-developed graphitized structure of CCNTs contributes to the reduction of the electrochemical resistance and leads to their superior stability at 65 °C during 10 000 cycles.
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Affiliation(s)
- Gi Mihn Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-Ro, Yuseong-Gu, Daejeon 34141, Republic of Korea.
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5
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Baik S, Park JH, Lee JW. One-pot conversion of carbon dioxide to CNT-grafted graphene bifunctional for sulfur cathode and thin interlayer of Li–S battery. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135264] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Liang C, Pan L, Liang S, Xia Y, Liang Z, Gan Y, Huang H, Zhang J, Zhang W. Ultraefficient Conversion of CO 2 into Morphology-Controlled Nanocarbons: A Sustainable Strategy toward Greenhouse Gas Utilization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1902249. [PMID: 31231950 DOI: 10.1002/smll.201902249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 06/09/2019] [Indexed: 06/09/2023]
Abstract
The ability to efficiently convert CO2 into nanocarbons at low temperatures is highly desirable, as it would enable the environmentally benign utilization of greenhouse gases, yet this remains a considerable challenge. Herein, a one-step, ultrafast, and scalable strategy is demonstrated to efficiently convert CO2 into morphology-controlled nanocarbons at low temperatures. The conversion reactions between CO2 and LiH are achieved in less than 30 s at moderate conditions by introducing a very small amount of water, ball milling, or heating. Nanocarbons featuring wildly tunable morphology with characteristic dimensions ranging from nanoscale to macroscale are successfully synthesized by controlling the CO2 pressure and the synthesis routes. The gas blowing velocity and its distribution are revealed as the main reasons for the CO2 pressure and synthesis route dependent morphology and porosity of nanocarbons. Moreover, a two closed-loop reaction process including five-stage reactions is proposed for nanocarbons synthesis and LiH regeneration. The strategy provides a new opportunity for efficient and environmentally benign nanocarbons synthesis.
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Affiliation(s)
- Chu Liang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Liangbin Pan
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Sheng Liang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Yang Xia
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Zhiqiang Liang
- Institute of Functional Nano & Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Yongping Gan
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Hui Huang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Jun Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Wenkui Zhang
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
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7
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Bagotia N, Choudhary V, Sharma DK. A review on the mechanical, electrical and EMI shielding properties of carbon nanotubes and graphene reinforced polycarbonate nanocomposites. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4277] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Nisha Bagotia
- Centre for Energy Studies; Indian Institute of Technology Delhi; New Delhi 110016 India
| | - Veena Choudhary
- Centre for Polymer Science and Technology; Indian Institute of Technology Delhi; New Delhi 110016 India
| | - D. K. Sharma
- Centre for Energy Studies; Indian Institute of Technology Delhi; New Delhi 110016 India
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8
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Byeon A, Hatter C, Park JH, Ahn CW, Gogotsi Y, Lee JW. Molybdenum oxide/carbon composites derived from the CO2 oxidation of Mo2CTx (MXene) for lithium ion battery anodes. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.149] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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9
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Baik S, Suh BL, Byeon A, Kim J, Lee JW. In-situ boron and nitrogen doping in flue gas derived carbon materials for enhanced oxygen reduction reaction. J CO2 UTIL 2017. [DOI: 10.1016/j.jcou.2017.05.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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El Essawy NA, Konsowa AH, Elnouby M, Farag HA. A novel one-step synthesis for carbon-based nanomaterials from polyethylene terephthalate (PET) bottles waste. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2017; 67:358-370. [PMID: 27700617 DOI: 10.1080/10962247.2016.1242517] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 09/21/2016] [Indexed: 06/06/2023]
Abstract
UNLABELLED Nowadays our planet suffers from an accumulation of plastic products that have the potential to cause great harm to the environment in the form of air, water, and land pollution. Plastic water bottles have become a great problem in the environment because of the large numbers consumed throughout the world. Certain types of plastic bottles can be recycled but most of them are not. This paper describes an economical solvent-free process that converts polyethylene terephthalate (PET) bottles waste into carbon nanostructure materials via thermal dissociation in a closed system under autogenic pressure together with additives and/or catalyst, which can act as cluster nuclei for carbon nanostructure materials such as fullerenes and carbon nanotubes. This research succeeded in producing and controlling the microstructure of various forms of carbon nanoparticles from the PET waste by optimizing the preparation parameters in terms of time, additives, and amounts of catalyst. IMPLICATIONS Plastic water bottles are becoming a growing segment of the municipal solid waste stream in the world; some are recycled but many are left in landfill sites. Recycling PET bottles waste can positively impact the environment in several ways: for instance, reduced waste, resource conservation, energy conservation, reduced greenhouse gas emissions, and decreasing the amount of pollution in air and water sources. The main novelty of the present work is based on the acquisition of high-value carbon-based nanomaterials from PET waste by a simple solvent-free chemical technique. Thus, the prepared materials are considered to be promising, cheap, eco-friendly materials that may find use in different applications.
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Affiliation(s)
- Noha A El Essawy
- a Advanced Technology & New Materials Research Institute , City of Scientific Research and Technological Applications (SRTA-City) , Alexandria , Egypt
| | - Abdelaziz H Konsowa
- b Chemical Engineering Department, Faculty of Engineering, Alexandria University , Alexandria , Egypt
| | - Mohamed Elnouby
- a Advanced Technology & New Materials Research Institute , City of Scientific Research and Technological Applications (SRTA-City) , Alexandria , Egypt
| | - Hassan A Farag
- b Chemical Engineering Department, Faculty of Engineering, Alexandria University , Alexandria , Egypt
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11
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Byeon A, Lee W, Kim GM, Lee JW. Hierarchically porous heteroatom-doped carbon derived from flue gases for electrochemical energy storage. J CO2 UTIL 2016. [DOI: 10.1016/j.jcou.2016.10.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Lee W, Kim GM, Baik S, Lee JW. Carbon dioxide conversion into boron/nitrogen dual-doped carbon as an electrode material for oxygen reduction reaction. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.05.206] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Sagu JS, Wijayantha KU, Holland P, Bohm M, Bohm S, Rout TK, Bandulasena H. Growth of carbon nanotubes from waste blast furnace gases at atmospheric pressure. CRYSTAL RESEARCH AND TECHNOLOGY 2016. [DOI: 10.1002/crat.201600068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jagdeep S. Sagu
- Energy Research Laboratory; Department of Chemistry; Loughborough University; Loughborough LE11 3TU United Kingdom
| | - K.G. Upul Wijayantha
- Energy Research Laboratory; Department of Chemistry; Loughborough University; Loughborough LE11 3TU United Kingdom
| | - Paul Holland
- EffecTech Ltd, Dove House, Dove Fields; Uttoxeter Staffordshire ST14 8HU United Kingdom
| | - Mallika Bohm
- TATA Steel R&D; Swinden Technology Centre; Moorgate Rotherham S60 3AR United Kingdom
| | - Siva Bohm
- TATA Steel R&D; Swinden Technology Centre; Moorgate Rotherham S60 3AR United Kingdom
| | - Tapan Kumar Rout
- New Technology Developments & Strategy Planning Research & Development Division; TATA Steel Ltd; Jamshedpur 831007 India
| | - Hemaka Bandulasena
- Department of Chemical Engineering; Loughborough University; Loughborough LE11 3TU United Kingdom
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14
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Yan Y, Miao J, Yang Z, Xiao FX, Yang HB, Liu B, Yang Y. Carbon nanotube catalysts: recent advances in synthesis, characterization and applications. Chem Soc Rev 2015; 44:3295-346. [DOI: 10.1039/c4cs00492b] [Citation(s) in RCA: 480] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Carbon nanotubes are promising materials for various applications.
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Affiliation(s)
- Yibo Yan
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Jianwei Miao
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Zhihong Yang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Fang-Xing Xiao
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Hong Bin Yang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Bin Liu
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Yanhui Yang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
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15
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Hintsho N, Shaikjee A, Tripathi PK, Franklyn P, Durbach S. The effect of CO2 on the CVD synthesis of carbon nanomaterials using fly ash as a catalyst. RSC Adv 2015. [DOI: 10.1039/c5ra06892d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbon nanomaterials (CNMs) can be derived from waste materials such as: coal fly ash and CO2, with CO2 and C2H2 as carbon sources respectively.
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Affiliation(s)
- Nomso Hintsho
- DST-NRF Centre of Excellence in Strong Materials
- University of the Witwatersrand (Wits)
- Johannesburg 2050
- South Africa
- Molecular Sciences Institute
| | - Ahmed Shaikjee
- DST-NRF Centre of Excellence in Strong Materials
- University of the Witwatersrand (Wits)
- Johannesburg 2050
- South Africa
| | - Pranav K. Tripathi
- Molecular Sciences Institute
- School of Chemistry
- University of the Witwatersrand (Wits)
- Johannesburg
- South Africa
| | - Paul Franklyn
- DST-NRF Centre of Excellence in Strong Materials
- University of the Witwatersrand (Wits)
- Johannesburg 2050
- South Africa
- Molecular Sciences Institute
| | - Shane Durbach
- DST-NRF Centre of Excellence in Strong Materials
- University of the Witwatersrand (Wits)
- Johannesburg 2050
- South Africa
- Molecular Sciences Institute
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16
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Meng Y, Voiry D, Goswami A, Zou X, Huang X, Chhowalla M, Liu Z, Asefa T. N-, O-, and S-Tridoped Nanoporous Carbons as Selective Catalysts for Oxygen Reduction and Alcohol Oxidation Reactions. J Am Chem Soc 2014; 136:13554-7. [DOI: 10.1021/ja507463w] [Citation(s) in RCA: 278] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yuying Meng
- School
of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
| | | | | | - Xiaoxin Zou
- State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China
| | | | | | - Zhongwu Liu
- School
of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou 510640, China
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17
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Bazargan A, Yan Y, Hui CW, McKay G. A Review: Synthesis of Carbon-Based Nano and Micro Materials by High Temperature and High Pressure. Ind Eng Chem Res 2013. [DOI: 10.1021/ie4018513] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alireza Bazargan
- Department
of Chemical and Biomolecular Engineering, Hong Kong University of Technology, Clearwater Bay,
Hong Kong
| | - Ying Yan
- Department
of Chemical and Biomolecular Engineering, Hong Kong University of Technology, Clearwater Bay,
Hong Kong
| | - Chi Wai Hui
- Department
of Chemical and Biomolecular Engineering, Hong Kong University of Technology, Clearwater Bay,
Hong Kong
| | - Gordon McKay
- Department
of Chemical and Biomolecular Engineering, Hong Kong University of Technology, Clearwater Bay,
Hong Kong
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18
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Wang Z, Liu J, Zhang M, Cukier RI, Bu Y. Solvation and evolution dynamics of an excess electron in supercritical CO2. PHYSICAL REVIEW LETTERS 2012; 108:207601. [PMID: 23003186 DOI: 10.1103/physrevlett.108.207601] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 02/08/2012] [Indexed: 06/01/2023]
Abstract
We present an ab initio molecular dynamics simulation of the dynamics of an excess electron solvated in supercritical CO2. The excess electron can exist in three types of states: CO2-core localized, dual-core localized, and diffuse states. All these states undergo continuous state conversions via a combination of long lasting breathing oscillations and core switching, as also characterized by highly cooperative oscillations of the excess electron volume and vertical detachment energy. All of these oscillations exhibit a strong correlation with the electron-impacted bending vibration of the core CO2, and the core-switching is controlled by thermal fluctuations.
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Affiliation(s)
- Zhiping Wang
- The Center of Molecular Modeling & Simulation, Institute of Theoretical Chemistry, Shandong University, Jinan, 250100, People's Republic of China
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19
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Zhang J, Zhao Y, Guan X, Stark RE, Akins DL, Lee JW. Formation of Graphene Oxide Nanocomposites from Carbon Dioxide Using Ammonia Borane. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2012; 116:2639-2644. [PMID: 22337562 PMCID: PMC3277841 DOI: 10.1021/jp210295e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
To efficiently recycle CO(2) to economically viable products such as liquid fuels and carbon nanomaterials, the reactivity of CO(2) is required to be fully understood. We have investigated the reaction of CO(2) with ammonia borane (AB), both molecules being able to function as either an acid or a base, to obtain more insights into the amphoteric activity of CO(2). In the present work, we demonstrate that CO(2) can be converted to graphene oxide (GO) using AB at moderate conditions. The conversion consists of two consecutive steps: CO(2) fixation (CO(2) pressure < 3 MPa and temperature < 100 °C) and graphenization (600-750 °C under 0.1 MPa of N(2)). The first step generates a solid compound that contains methoxy (OCH(3)), formate (HCOO) and aliphatic groups while the second graphenization is the pyrolysis of the solid compound to produce graphene oxide-boron oxide nanocomposites, which have been confirmed by micro-Raman spectroscopy, solid state (13)C and (11)B magic angle spinning-nuclear magnetic resonance (MAS-NMR), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Our observations also show that the mass of solid product in CO(2) fixation process and raw graphene oxide nanocomposites is twice and 1.2 times that of AB initially charged, respectively. The formation of aliphatic groups without using metal-containing compounds at mild conditions is of great interest to the synthesis of various organic products starting from CO(2.).
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Affiliation(s)
- Junshe Zhang
- Department of Chemical Engineering Department, The City College of New York, NY 10031
| | - Yu Zhao
- Chemistry Department and Center for Analysis of Structures and Interfaces, The City College of New York, NY 10031
| | - Xudong Guan
- Chemistry Department and CUNY Institute for Macromolecular Assemblies, The City College of New York, NY 10031
| | - Ruth E. Stark
- Chemistry Department and CUNY Institute for Macromolecular Assemblies, The City College of New York, NY 10031
| | - Daniel L. Akins
- Chemistry Department and Center for Analysis of Structures and Interfaces, The City College of New York, NY 10031
| | - Jae W. Lee
- Department of Chemical Engineering Department, The City College of New York, NY 10031
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20
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Ito T, Tamura T. Clustering effects in plasma-assisted chemical fluid deposition of copper: Similarities between deposition rate and density fluctuation. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2010.12.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Simate GS, Iyuke SE, Ndlovu S, Yah CS, Walubita LF. The production of carbon nanotubes from carbon dioxide: challenges and opportunities. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/s1003-9953(09)60099-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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22
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Carbon materials syntheses using dielectric barrier discharge microplasma in supercritical carbon dioxide environments. J Supercrit Fluids 2007. [DOI: 10.1016/j.supflu.2006.12.003] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Luo W, Xie Y, Zhu K, Zheng F. The large-scale synthesis and characterization of carbon nanotubes filled with long continuous inorganic nanowires in supercritical CS(2). NANOTECHNOLOGY 2006; 17:5702-5706. [PMID: 21727345 DOI: 10.1088/0957-4484/17/22/028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Large-scale long continuous FeS(2) nanowire filled carbon nanotubes (CNTs) were one-step synthesized in the presence of NaN(3) in supercritical CS(2) at 500 °C using ferrocene as the iron source. The CNTs have outer diameters in the range of 15-25 nm and the core FeS(2) nanowires inside CNTs are characterized as single crystals, with an average diameter of 8 nm and up to several micrometres in length. The band gap of FeS(2) nanowire filled CNTs was determined as 5.69 eV from the ultraviolet and visible light absorption spectrum, showing its promise for application in reversible conversion between solar energy and electrical or chemical energy.
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Affiliation(s)
- Wei Luo
- Department of Nanomaterials and Nanochemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, People's Republic of China
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Deng B, Xu AW, Chen GY, Song RQ, Chen L. Synthesis of Copper-Core/Carbon-Sheath Nanocables by a Surfactant-Assisted Hydrothermal Reduction/Carbonization Process. J Phys Chem B 2006; 110:11711-6. [PMID: 16800467 DOI: 10.1021/jp0603029] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A simple hydrothermal method has been developed for the one-step synthesis of copper-core/carbon-sheath nanocables in solution. The obtained nanostructures were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution TEM (HRTEM), Raman, and UV-vis spectrum analysis. These copper@carbon nanocables formed through the hydrothermal reduction/carbonization in the presence of surfactant cetyltrimethylammonium bromide (CTAB) acting as the structure-directing agent by hydrothermal treatment. HRTEM and selected-area electron diffraction (SAED) indicate that the resulted Cu nanowires had the preferred [110] growth direction. The influence of the reaction temperature, reaction time, and pH on the final products was investigated in detail. The possible formation mechanism for copper-core/carbon-sheath nanocables was also proposed. Amorphous carbon nanotubes can be obtained by etching the copper core in the nanocables.
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Affiliation(s)
- Bin Deng
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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26
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Yang H, Mercier P, Wang SC, Akins DL. High-pressure synthesis of carbon nanotubes with a variety of morphologies. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.09.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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27
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Chen J, Shen D, Wu W, Han B, Wang B, Sun D. Solvatochromic behavior of phenol blue in CO2+ethanol and CO2+n-pentane mixtures in the critical region and local composition enhancement. J Chem Phys 2005; 122:204508. [PMID: 15945753 DOI: 10.1063/1.1917747] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The UV-Vis spectra of probe phenol blue in CO(2)+ethanol and CO(2)+n-pentane binary mixtures were studied at 308.15 K and different pressures. The experiments were conducted in both supercritical region and subcritical region of the mixtures by changing the compositions of the mixed solvents. On the basis of the experimental results the local compositions of the solvents about phenol blue were estimated by neglecting the size difference of CO(2) and the cosolvents. Then the local composition data were corrected by a method proposed in this work, which is mainly based on Lennard-Jones sphere model. It was demonstrated that the local mole fraction of the cosolvents is higher than that in the bulk solution at all the experimental conditions. In the near critical region of the mixed solvents the local composition enhancement, defined as the ratio of cosolvent mole fraction about the solute to that in the bulk solution, increased significantly as pressure approached the phase boundary from high pressure. The local composition enhancement was not considerable as pressure was much higher than the critical pressure. In addition, in subcritical region the degree of composition enhancement was much smaller and was not sensitive to pressure in the entire pressure range as the concentration of the cosolvents in the mixed solvents was much higher than the concentration at the critical point of the mixtures.
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Affiliation(s)
- Jiawei Chen
- The Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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Lou Z, Chen C, Chen Q. Growth of Conical Carbon Nanotubes by Chemical Reduction of MgCO3. J Phys Chem B 2005; 109:10557-60. [PMID: 16852279 DOI: 10.1021/jp0453717] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Carbon nanotubes were synthesized by chemical reduction of magnesium carbonate with metallic lithium at 600 degrees C. The nanotubes with an average length of 13 microm and diameter of 60 nm are made of short coaxial conical cylinder tubular graphite sheets with their cone axis parallel to the tube axis, different from the ordinary carbon nanotubes, composed of concentric cylindrical graphite layers with their normal perpendicular to the tube axis. It is suggested that nanoscale rough surface of lithium formed at the interface between supercritical carbon dioxide and liquid lithium takes the roles of both the reductant for reduction of carbon dioxide to carbon and the template for growth of carbon nanotubes.
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Affiliation(s)
- Zhengsong Lou
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Materials Science & Engineering, University of Science and Technology of China, Jinzhai Road, Hefei 230026, China
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Eastoe J, Dupont A, Steytler DC, Thorpe M, Gurgel A, Heenan RK. Micellization of economically viable surfactants in CO(2). J Colloid Interface Sci 2003; 258:367-73. [PMID: 12618107 DOI: 10.1016/s0021-9797(02)00104-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Stability and aggregation structures of various economically viable surfactants for CO(2) are reported. The compounds are either commercially available octylphenol nonionics (Triton X-100, X-100 reduced, and X-45) or custom-made analogues of aerosol-OT (J. Am. Chem. Soc. 123 (2001) 988). These were selected to reveal the influence of chain terminal group structure, namely highly methylated t-butyl units, on solubility and aggregation in CO(2). In addition the mean ethylene oxide block length is varied for the Triton surfactants (X-100 approximately EO(10), X-45 approximately EO(8)). High-pressure small-angle neutron scattering (SANS) experiments revealed the presence of aggregates, consistent with spheroidal reverse micelles. The nonionics show a temperature and pressure dependence on solubility. These results confirm the special affinity of highly methyl-branched tails for CO(2). However, none of these systems were able to disperse significant amounts of water or brine; therefore hydrated reversed micelles or microemulsion droplets were not stabilized. Hence the utility of these cheap methyl-branched surfactants in CO(2) is limited, and so groups of greater CO(2)-philicity are needed to achieve the goal of water-hydrocarbon surfactant-CO(2) dispersions.
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Affiliation(s)
- Julian Eastoe
- School of Chemistry, University of Bristol, BS8 1TS, Bristol, UK.
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Rana RK, Gedanken A. Carbon Nanoflask: A Mechanistic Elucidation of Its Formation. J Phys Chem B 2002. [DOI: 10.1021/jp025566j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rohit Kumar Rana
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - Aharon Gedanken
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
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Motiei M, Calderon-Moreno J, Gedanken A. Forming multiwalled carbon nanotubes by the thermal decomposition of Mo(CO)6. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00519-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kostyanovsky RG, Levkin PA, Lyssenko KA, Strelenko YA, Golovanov DG. Ångström-sized pore crystal. MENDELEEV COMMUNICATIONS 2002. [DOI: 10.1070/mc2002v012n06abeh001659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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