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Jiang W, Haider MR, Duan Y, Han J, Ding Y, Mi B, Wang A. Metal-free electrified membranes for contaminants oxidation: Synergy effect between membrane rejection and nanoconfinement. WATER RESEARCH 2024; 248:120862. [PMID: 37976953 DOI: 10.1016/j.watres.2023.120862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 10/04/2023] [Accepted: 11/11/2023] [Indexed: 11/19/2023]
Abstract
Electro-Fenton processes are frequently impeded by depletion of metal catalysts, unbalance between H2O2 generation and activation, and low concentration of reactive species (e.g., •OH) in the bulk solution. A metal-free electro-Fenton membrane was fabricated with nitrogen-doped carbon nanotube (N-CNT) and reduced graphene oxide (RGO). N-CNT acted as a catalyst for both H2O2 generation and activation, while the incorporated RGO served as the second catalyst for H2O2 generation and improved the performance of membrane rejection. The electrified membrane was optimized in terms of nitrogen precursors selection and composition of N-CNT and RGO to achieve optimal coupling between H2O2 generation and activation. The membrane fabricated with 67% mass of N-CNT with urea as the precursor achieved over 95% removal of the target contaminants in a single pass through the membrane with a water flux of 63 L m-2 h-1. This membrane also exhibited efficient transformation of various concentrations of contaminants (i.e., 1-10 mg L-1) over a broad range of pH (i.e., 3-9). Due to its good durability and low energy consumption, the metal-free electro-Fenton membrane holds promise for practical water treatment application. The concentration-catalytic oxidation model elucidated that the elevated contaminant concentration near the membrane surface enhanced the transformation rate by 40%. The nanoconfinement enhanced the transformation rate constant inside the membrane by a factor of 105 because of elevated •OH concentration inside the nanopores. Based on the prediction of this model, the configuration of the membrane reactor has been optimized.
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Affiliation(s)
- Wenli Jiang
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, PR China; Department of Civil & Environmental Engineering, University of California, Berkeley, CA 94720, United States; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Muhammad Rizwan Haider
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, PR China
| | - Yanghua Duan
- Department of Civil & Environmental Engineering, University of California, Berkeley, CA 94720, United States
| | - Jinglong Han
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, PR China.
| | - Yangcheng Ding
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China
| | - Baoxia Mi
- Department of Civil & Environmental Engineering, University of California, Berkeley, CA 94720, United States.
| | - Aijie Wang
- School of Civil & Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, PR China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
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2
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Tran Huu H, Nguyen NP, Ngo VH, Luc HH, Le MK, Nguyen MT, Le MLP, Kim HR, Kim IY, Kim SJ, Tran VM, Vo V. In situ magnesiothermic reduction synthesis of a Ge@C composite for high-performance lithium-ion batterie anodes. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2023; 14:751-761. [PMID: 37405152 PMCID: PMC10315890 DOI: 10.3762/bjnano.14.62] [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: 03/27/2023] [Accepted: 06/14/2023] [Indexed: 07/06/2023]
Abstract
Metallothermic, especially magnesiothermic, solid-state reactions have been widely applied to synthesize various materials. However, further investigations regarding the use of this method for composite syntheses are needed because of the high reactivity of magnesium. Herein, we report an in situ magnesiothermic reduction to synthesize a composite of Ge@C as an anode material for lithium-ion batteries. The obtained electrode delivered a specific capacity of 454.2 mAh·g-1 after 200 cycles at a specific current of 1000 mA·g-1. The stable electrochemical performance and good rate performance of the electrode (432.3 mAh·g-1 at a specific current of 5000 mA·g-1) are attributed to the enhancement in distribution and chemical contact between Ge nanoparticles and the biomass-based carbon matrix. A comparison with other synthesis routes has been conducted to demonstrate the effectiveness of contact formation during in situ synthesis.
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Affiliation(s)
- Ha Tran Huu
- Faculty of Natural Science, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh, 55000, Vietnam
| | - Ngoc Phi Nguyen
- Faculty of Natural Science, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh, 55000, Vietnam
| | - Vuong Hoang Ngo
- Faculty of Natural Science, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh, 55000, Vietnam
| | - Huy Hoang Luc
- Faculty of Physics, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, 11300, Hanoi, Vietnam
| | - Minh Kha Le
- Applied Physical Chemistry Laboratory, University of Science, Viet Nam National University Ho Chi Minh City, 70000, Vietnam
| | - Minh Thu Nguyen
- Applied Physical Chemistry Laboratory, University of Science, Viet Nam National University Ho Chi Minh City, 70000, Vietnam
| | - My Loan Phung Le
- Applied Physical Chemistry Laboratory, University of Science, Viet Nam National University Ho Chi Minh City, 70000, Vietnam
| | - Hye Rim Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, South Korea
| | - In Young Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, South Korea
| | - Sung Jin Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, South Korea
| | - Van Man Tran
- Applied Physical Chemistry Laboratory, University of Science, Viet Nam National University Ho Chi Minh City, 70000, Vietnam
| | - Vien Vo
- Faculty of Natural Science, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, Binh Dinh, 55000, Vietnam
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Xu H, Lu Y, Jiang F, Zhang J, Ge Y, Li Z. 3D porous N-doped lignosulfonate/graphene oxide aerogel for efficient solar steam generation and desalination. Int J Biol Macromol 2023; 233:123469. [PMID: 36720330 DOI: 10.1016/j.ijbiomac.2023.123469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/09/2023] [Accepted: 01/25/2023] [Indexed: 02/02/2023]
Abstract
Solar-driven interfacial evaporation has been considered one of the most promising approaches to tackle the issue of water scarcity. The salt resistance and water transport capacity of solar evaporation materials are essential to evaluate desalination performance. Herein, a 3D-porous N-doped lignosulfonate/graphene oxide (GO) aerogel (NLGA) was facilely prepared by a one-step hydrothermal method. By introducing ethylenediamine (EDA) as a nitrogen source, the wettability and water transport capacity of the aerogel were enhanced; by introducing lignosulfonate (LS), its porous structure was regulated, and its light absorption capability was significantly improved. The obtained aerogel exhibited an outstanding evaporation rate (1.57 kg m-2 h-1) and efficiency (95.2 %) under 1 sun illumination, which is significantly better than some reported foam-based solar evaporators. In addition, NLGA maintained a stable evaporation rate over long-term cyclic evaporation without visible salt accumulation on the surface. The good salt rejection performance is due to the rich-pore structure and superhydrophilicity of NGLA, which provides sufficient water supply to dissolve the salts during water evaporation. NLGA has enormous potential as a solar evaporator based on its excellent performance in solar vapor generation.
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Affiliation(s)
- Hui Xu
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
| | - Yaoqin Lu
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
| | - Fangyuan Jiang
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
| | - Jiemei Zhang
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
| | - Yuanyuan Ge
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China
| | - Zhili Li
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China.
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Rybak A, Rybak A, Boncel S, Kolanowska A, Kaszuwara W, Kolev SD. Hybrid organic-inorganic membranes based on sulfonated poly (ether ether ketone) matrix and iron-encapsulated carbon nanotubes and their application in CO 2 separation. RSC Adv 2022; 12:13367-13380. [PMID: 35520128 PMCID: PMC9066557 DOI: 10.1039/d2ra01585d] [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: 03/10/2022] [Accepted: 04/15/2022] [Indexed: 11/25/2022] Open
Abstract
The need to reduce greenhouse gas emissions dictates the search for new methods and materials. Here, a novel type of inorganic–organic hybrid materials Fe@MWCNT-OH/SPEEK (with a new type of CNT characterized by increased iron content, 5.80 wt%) for CO2 separation is presented. The introduction of nanofillers into a polymer matrix has significantly improved hybrid membrane gas transport (D, P, S, and αCO2/N2), and magnetic, thermal, and mechanical parameters. It was found that magnetic casting has improved the alignment and dispersion of Fe@MWCNT-OH carbon nanotubes. At the same time, CNT and polymer chemical modification enhanced interphase compatibility and membrane CO2 separation efficiency. The thermooxidative stability, and mechanical and magnetic parameters of composites were improved by increasing new CNT loading. Cherazi's model turned out to be suitable for describing the CO2 transport through analyzed hybrid membranes. The comparison of the transport and separation properties of the tested membranes with the literature data indicates their potential application in the future and the direction of further research. Fe@MWCNT-OH/SPEEK hybrid membranes for CO2 separation! Significant improvement of hybrid membrane's gas transport, magnetic, thermal, and mechanical parameters. Enhancement of interphase compatibility after CNT and polymer chemical modification.![]()
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Affiliation(s)
- Aleksandra Rybak
- Faculty of Chemistry, Silesian University of Technology Strzody 7 44-100 Gliwice Poland
| | - Aurelia Rybak
- Faculty of Mining, Safety Engineering and Industrial Automation, Silesian University of Technology Gliwice Poland
| | - Sławomir Boncel
- Faculty of Chemistry, Silesian University of Technology Strzody 7 44-100 Gliwice Poland
| | - Anna Kolanowska
- Faculty of Chemistry, Silesian University of Technology Strzody 7 44-100 Gliwice Poland
| | - Waldemar Kaszuwara
- Faculty of Materials Science and Engineering, Warsaw University of Technology Warszawa Poland
| | - Spas D Kolev
- School of Chemistry, The University of Melbourne Victoria 3010 Australia
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5
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Systematic investigation of experimental parameters on nitrogen incorporation into carbon nanotube forests. MATERIALS RESEARCH BULLETIN 2022. [DOI: 10.1016/j.materresbull.2021.111676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Characteristics of Inorganic–Organic Hybrid Membranes Containing Carbon Nanotubes with Increased Iron-Encapsulated Content for CO2 Separation. MEMBRANES 2022; 12:membranes12020132. [PMID: 35207053 PMCID: PMC8875983 DOI: 10.3390/membranes12020132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/16/2022] [Accepted: 01/18/2022] [Indexed: 02/01/2023]
Abstract
Novel inorganic–organic hybrid membranes Fe@MWCNT/PPO or Fe@MWCNT-OH/SPPO (with a new type of CNTs characterized by increased iron content 5.80 wt%) were synthesized for CO2 separation. The introduction of nanofillers into the polymer matrix has significantly improved the hybrid membrane’s gas transport (D, P, S, and αCO2/N2), magnetic, thermal, and mechanical parameters. It was found that magnetic casting has improved the alignment and dispersion of Fe@MWCNTs. At the same time, CNTs and polymer chemical modification enhanced interphase compatibility and the membrane’s CO2 separation efficiency. The thermo-oxidative stability and mechanical and magnetic parameters of composites were improved by increasing new CNTs loading. Cherazi’s model turned out to be suitable for describing the CO2 transport through analyzed hybrid membranes.
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Chandrasekaran S, Zhang C, Shu Y, Wang H, Chen S, Nesakumar Jebakumar Immanuel Edison T, Liu Y, Karthik N, Misra R, Deng L, Yin P, Ge Y, Al-Hartomy OA, Al-Ghamdi A, Wageh S, Zhang P, Bowen C, Han Z. Advanced opportunities and insights on the influence of nitrogen incorporation on the physico-/electro-chemical properties of robust electrocatalysts for electrocatalytic energy conversion. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214209] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Erfanian E, Kamkar M, Pawar SP, Keteklahijani YZ, Arjmand M, Sundararaj U. A Simple Approach to Control the Physical and Chemical Features of Custom-Synthesized N-Doped Carbon Nanotubes and the Extent of Their Network Formation in Polymers: The Importance of Catalyst to Substrate Ratio. Polymers (Basel) 2021; 13:polym13234156. [PMID: 34883659 PMCID: PMC8659621 DOI: 10.3390/polym13234156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 12/02/2022] Open
Abstract
This study intends to reveal the significance of the catalyst to substrate ratio (C/S) on the structural and electrical features of the carbon nanotubes and their polymeric nanocomposites. Here, nitrogen-doped carbon nanotube (N-MWNT) was synthesized via a chemical vapor deposition (CVD) method using three ratios (by weight) of iron (Fe) catalyst to aluminum oxide (Al2O3) substrate, i.e.,1/9, 1/4, and 2/3, by changing the Fe concentration, i.e., 10, 20, and 40 wt.% Fe. Therefore, the synthesized N-MWNT are labelled as (N-MWNTs)10, (N-MWNTs)20, and (N-MWNTs)40. TEM, XPS, Raman spectroscopy, and TGA characterizations revealed that C/S ratio has a significant impact on the physical and chemical properties of the nanotubes. For instance, by increasing the Fe catalyst from 10 to 40 wt.%, carbon purity increased from 60 to 90 wt.% and the length of the nanotubes increased from 1.2 to 2.6 µm. Interestingly, regarding nanotube morphology, at the highest C/S ratio, the N-MWNTs displayed an open-channel structure, while at the lowest catalyst concentration the nanotubes featured a bamboo-like structure. Afterwards, the network characteristics of the N-MWNTs in a polyvinylidene fluoride (PVDF) matrix were studied using imaging techniques, AC electrical conductivity, and linear and nonlinear rheological measurements. The nanocomposites were prepared via a melt-mixing method at various loadings of the synthesized N-MWNTs. The rheological results confirmed that (N-MWNTs)10, at 0.5–2.0 wt.%, did not form any substantial network through the PVDF matrix, thereby exhibiting an electrically insulative behavior, even at a higher concentration of 3.0 wt.%. Although the optical microscopy, TEM, and rheological results confirmed that both (N-MWNTs)20 and (N-MWNTs)40 established a continuous 3D network within the PVDF matrix, (N-MWNTs)40/PVDF nanocomposites exhibited approximately one order of magnitude higher electrical conductivity. The higher electrical conductivity of (N-MWNTs)40/PVDF nanocomposites is attributed to the intrinsic chemical features of (N-MWNTs)40, such as nitrogen content and nitrogen bonding types.
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Affiliation(s)
- Elnaz Erfanian
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
| | - Milad Kamkar
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada; (M.K.); (M.A.)
| | - Shital Patangrao Pawar
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
| | - Yalda Zamani Keteklahijani
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
| | - Mohammad Arjmand
- School of Engineering, University of British Columbia, Kelowna, BC V1V 1V7, Canada; (M.K.); (M.A.)
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada; (E.E.); (S.P.P.); (Y.Z.K.)
- Correspondence: ; Tel.: +1-403-210-6549; Fax: +1-403-2844852
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Rdest M, Janas D. Carbon Nanotube Wearable Sensors for Health Diagnostics. SENSORS (BASEL, SWITZERLAND) 2021; 21:5847. [PMID: 34502734 PMCID: PMC8433779 DOI: 10.3390/s21175847] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/20/2021] [Accepted: 08/26/2021] [Indexed: 11/25/2022]
Abstract
This perspective article highlights a recent surge of interest in the application of textiles containing carbon nanotube (CNT) sensors for human health monitoring. Modern life puts more and more pressure on humans, which translates into an increased number of various health disorders. Unfortunately, this effect either decreases the quality of life or shortens it prematurely. A possible solution to this problem is to employ sensors to monitor various body functions and indicate an upcoming disease likelihood at its early stage. A broad spectrum of materials is currently under investigation for this purpose, some of which already entered the market. One of the most promising materials in this field are CNTs. They are flexible and of high electrical conductivity, which can be modulated upon several forms of stimulation. The article begins with an illustration of techniques for how wearable sensors can be built from them. Then, their application potential for tracking various health parameters is presented. Finally, the article ends with a summary of this field's progress and a vision of the key directions to domesticate this concept.
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Affiliation(s)
- Monika Rdest
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Rd., Cambridge CB3 0FS, UK;
| | - Dawid Janas
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, B. Krzywoustego 4, 44-100 Gliwice, Poland
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10
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Recent trends in Nitrogen doped polymer composites: a review. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02436-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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A facile synthesis of nitrogen-doped bamboo-shaped carbon nanotubes by catalytic decomposition of 2-aminopyrimidine over Fe@MgO catalyst through chemical vapor deposition method. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-020-01333-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Dong R, Wu F, Bai Y, Wu C. Sodium Storage Mechanism and Optimization Strategies for Hard Carbon Anode of Sodium Ion Batteries. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21060284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Ali Z, Mehmood M, Ahmad J, Naz S, Khan Y. Heteroatoms (N, F, O)-Doped CNTs on NiCo-Silica Nanocomposites for Oxygen Evolution Reaction. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2020. [DOI: 10.1007/s13369-020-04866-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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From Bio to Nano: A Review of Sustainable Methods of Synthesis of Carbon Nanotubes. SUSTAINABILITY 2020. [DOI: 10.3390/su12104115] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This review summarizes the up-to-date techniques devised to synthesize carbon nanotubes (CNTs) from liquid or solid precursors of sustainable nature. The possibility to replace petroleum-based feeds for renewable resources such as essential oils or plant shoots is critically examined. The analysis shows that the complex nature of such resources requires the optimization of the reaction conditions to obtain products of desired microstructure and chemical composition. However, appropriate tuning of the process parameters enables the synthesis of even high-purity single-walled CNTs with a spectrum of demonstrated high-performance applications at low cost. The sheer number of successful studies completed on this front so far and described herein validate that the development of techniques for the manufacture of such products of high-added value from common precursors is not only possible but, most importantly, promising.
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Nitrogen-Doped Carbon Nanotube/Polypropylene Composites with Negative Seebeck Coefficient. JOURNAL OF COMPOSITES SCIENCE 2020. [DOI: 10.3390/jcs4010014] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study describes the application of multi-walled carbon nanotubes that were nitrogen-doped during their synthesis (N-MWCNTs) in melt-mixed polypropylene (PP) composites. Different types of N-MWCNTs, synthesized using different methods, were used and compared. Four of the five MWCNT grades showed negative Seebeck coefficients (S), indicating n-type charge carrier behavior. All prepared composites (with a concentration between 2 and 7.5 wt% N-MWCNTs) also showed negative S values, which in most cases had a higher negative value than the corresponding nanotubes. The S values achieved were between 1.0 μV/K and −13.8 μV/K for the N-MWCNT buckypapers or powders and between −4.7 μV/K and −22.8 μV/K for the corresponding composites. With a higher content of N-MWCNTs, the increase in electrical conductivity led to increasing values of the power factor (PF) despite the unstable behavior of the Seebeck coefficient. The highest power factor was achieved with 4 wt% N-MWCNT, where a suitable combination of high electrical conductivity and acceptable Seebeck coefficient led to a PF value of 6.1 × 10−3 µW/(m·K2). First experiments have shown that transient absorption spectroscopy (TAS) is a useful tool to study the carrier transfer process in CNTs in composites and to correlate it with the Seebeck coefficient.
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Zu Y, Yuan X, Xu X, Cole MT, Zhang Y, Li H, Yin Y, Wang B, Yan Y. Design and Simulation of a Multi-Sheet Beam Terahertz Radiation Source Based on Carbon-Nanotube Cold Cathode. NANOMATERIALS 2019; 9:nano9121768. [PMID: 31842262 PMCID: PMC6955727 DOI: 10.3390/nano9121768] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/06/2019] [Accepted: 12/10/2019] [Indexed: 11/16/2022]
Abstract
Carbon nanotube (CNT) cold cathodes are proving to be compelling candidates for miniaturized terahertz (THz) vacuum electronic devices (VEDs) owning to their superior field-emission (FE) characteristics. Here, we report on the development of a multi-sheet beam CNT cold cathode electron optical system with concurrently high beam current and high current density. The microscopic FE characteristics of the CNT film emitter is captured through the development of an empirically derived macroscopic simulation model which is used to provide representative emission performance. Through parametrically optimized macroscale simulations, a five-sheet-beam triode electron gun has been designed, and has been shown to emit up to 95 mA at 3.2 kV. Through careful engineering of the electron gun geometric parameters, a low-voltage compact THz radiation source operating in high-order TM5,1 mode is investigated to improve output power and suppress mode competition. Particle in cell (PIC) simulations show the average output power is 33 W at 0.1 THz, and the beam–wave interaction efficiency is approximately 10%.
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Affiliation(s)
- Yifan Zu
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
| | - Xuesong Yuan
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
- Correspondence:
| | - Xiaotao Xu
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
| | - Matthew T. Cole
- Department of Electronic and Electrical Engineering, University of Bath, North Road, Bath BA2 7AY, UK;
| | - Yu Zhang
- State Key Laboratory Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou 510275, China;
| | - Hailong Li
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
| | - Yong Yin
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
| | - Bin Wang
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
| | - Yang Yan
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China; (Y.Z.); (X.X.); (H.L.); (Y.Y.); (B.W.); (Y.Y.)
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Li Y, Zhang Z, Duan D, Han Y, Wang K, Hao X, Wang J, Liu S, Wu F. An Integrated Structural Air Electrode Based on Parallel Porous Nitrogen-Doped Carbon Nanotube Arrays for Rechargeable Li-Air Batteries. NANOMATERIALS 2019; 9:nano9101412. [PMID: 31623370 PMCID: PMC6836265 DOI: 10.3390/nano9101412] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 09/27/2019] [Accepted: 09/30/2019] [Indexed: 12/30/2022]
Abstract
The poor discharge and charge capacities, and the cycle performance of current Li-air batteries represent critical obstacles to their practical application. The fabrication of an integrated structural air electrode with stable parallel micropore channels and excellent electrocatalytic activity is an efficient strategy for solving these problems. Herein, a novel approach involving the synthesis of nitrogen-doped carbon nanotube (N-CNT) arrays on a carbon paper substrate with a conductive carbon-black layer for use as the air electrode is presented. This design achieves faster oxygen, lithium ion, and electron transfer, which allows higher oxygen reduction/evolution reaction activities. As a result, the N-CNT arrays (N/C = 1:20) deliver distinctly higher discharge and charge capacities, 2203 and 186 mAh g-1, than those of active carbons with capacities of 497 and 71 mAh g-1 at 0.05 mA cm-2, respectively. A theoretical analysis of the experimental results shows that the parallel micropore channels of the air electrode decrease oxygen diffusion resistance and lithium ion transfer resistance, enhancing the discharge and charge capacities and cycle performance of Li-air batteries. Additionally, the N-CNT arrays with a high pyridinic nitrogen content can decompose the lithium peroxide product and recover the electrode morphology, thereby further improving the discharge-charge performance of Li-air batteries.
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Affiliation(s)
- Yu Li
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Zhonglin Zhang
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Donghong Duan
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Yunxia Han
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Kunlei Wang
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Xiaogang Hao
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Junwen Wang
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Shibin Liu
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Fanhua Wu
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
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Chemical Vapour Deposition of MWCNT on Silica Coated Fe 3O 4 and Use of Response Surface Methodology for Optimizing the Extraction of Organophosphorus Pesticides from Water. Int J Anal Chem 2019; 2019:4564709. [PMID: 31354825 PMCID: PMC6636531 DOI: 10.1155/2019/4564709] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 05/17/2019] [Accepted: 05/30/2019] [Indexed: 01/30/2023] Open
Abstract
Multiwalled carbon nanotube (MWCNT) was fixed onto the surface of a magnetic silica (Fe3O4@SiO2) substrate via chemical vapour deposition (CVD). Acetylene gas was used as the carbon source and cobalt oxide as the catalyst. The chemical and physical characteristics of the materials were investigated by transmission electron microscopy (TEM), Raman spectroscopy (RS), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), and nitrogen adsorption/desorption isotherm. The synthesized Fe3O4@SiO2-MWCNT nanocomposite was used as a magnetic solid phase extraction (MSPE) adsorbent for the preconcentration of organophosphorus pesticides (OPPs), specifically, azinphos methyl, chlorpyrifos, parathion, and malathion. The factors influencing the extraction efficiency such as pH, contact time, and adsorbent dosage were investigated and optimized by response surface methodology (RSM) and desirability function. Linear response was obtained in the concentration range of 10–200 μg/L for the analytes with determination coefficients ranging between 0.9955 and 0.9977. The limits of detection (LODs) and quantification (LOQs) were in the range of 0.004-0.150 μg/L and 0.013-0.499 μg/L, respectively. Fe3O4@SiO2-MWCNT was applied in the extraction and subsequent determination of OPPs in water samples from Vaal River and Vaal Dam with recoveries ranging from 84.0 to 101.4% (RSDs = 3.8–9.6%, n = 3) in Vaal River and 86.2 to 93.8% (RSDs = 2.9–10.4%, n = 3) in Vaal Dam. The obtained results showed that the newly synthesized Fe3O4@SiO2-MWCNT nanocomposite can be an efficient adsorbent with good potential for the preconcentration and extraction of selected OPPs from aqueous media.
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Highly Optimized Nitrogen-Doped MWCNTs through In-Depth Parametric Study Using Design of Experiments. NANOMATERIALS 2019; 9:nano9040643. [PMID: 31010018 PMCID: PMC6523270 DOI: 10.3390/nano9040643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 04/13/2019] [Accepted: 04/16/2019] [Indexed: 01/15/2023]
Abstract
The in-situ nitrogen doping of multiwalled carbon nanotubes via chemical vapor deposition is investigated employing design of experiments (DoE). The establishment of empirical DoE models allowed for the prediction of product features as a function of process conditions in order to systematically synthesize tailor-made nitrogen-doped carbon nanotubes. The high informative content of this approach revealed effects of individual parameters and their interaction with each other. Hence, new valuable insights into the effect of temperature, injection rate, and carrier gas flow on the doping level were obtained which give motivation to approach further theoretical studies on the doping mechanism. Ultimately, competitive nitrogen-doped carbon nanotube features were optimized and yielded promising combinations of achieved doping level, graphitization, and aspect ratios in comparison to present literature values.
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20
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Green approach for in-situ growth of highly-ordered 3D flower-like CuS hollow nanospheres decorated on nitrogen and sulfur co-doped graphene bionanocomposite with enhanced peroxidase-like catalytic activity performance for colorimetric biosensing of glucose. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 90:576-588. [DOI: 10.1016/j.msec.2018.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 04/27/2018] [Accepted: 05/01/2018] [Indexed: 12/30/2022]
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Blandón-Naranjo L, Della Pelle F, Vázquez MV, Gallego J, Santamaría A, Alzate-Tobón M, Compagnone D. Electrochemical Behaviour of Microwave-assisted Oxidized MWCNTs Based Disposable Electrodes: Proposal of a NADH Electrochemical Sensor. ELECTROANAL 2018. [DOI: 10.1002/elan.201700674] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lucas Blandón-Naranjo
- Grupo Interdisciplinario de Estudios Moleculares-GIEM.; Instituto de Química; Universidad de Antioquia. Calle; 67 No. 53-108, A.A 1226 Medellín Colombia
| | - Flavio Della Pelle
- Faculty of Biosciences and Technologies for Food, Agriculture and Environment; University of Teramo; 64023 Teramo Italy
| | - Mario V. Vázquez
- Grupo Interdisciplinario de Estudios Moleculares-GIEM.; Instituto de Química; Universidad de Antioquia. Calle; 67 No. 53-108, A.A 1226 Medellín Colombia
| | - Jaime Gallego
- Química de Recursos Energéticos y Medio Ambiente-QUIREMA.; Instituto de Química; Universidad de Antioquia. Calle; 70 No. 52-21, A.A 1226 Medellín Colombia
| | - Alexander Santamaría
- Química de Recursos Energéticos y Medio Ambiente-QUIREMA.; Instituto de Química; Universidad de Antioquia. Calle; 70 No. 52-21, A.A 1226 Medellín Colombia
| | - Manuela Alzate-Tobón
- Química de Recursos Energéticos y Medio Ambiente-QUIREMA.; Instituto de Química; Universidad de Antioquia. Calle; 70 No. 52-21, A.A 1226 Medellín Colombia
| | - Dario Compagnone
- Faculty of Biosciences and Technologies for Food, Agriculture and Environment; University of Teramo; 64023 Teramo Italy
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Ren X, Guo H, Feng J, Si P, Zhang L, Ci L. Synergic mechanism of adsorption and metal-free catalysis for phenol degradation by N-doped graphene aerogel. CHEMOSPHERE 2018; 191:389-399. [PMID: 29054079 DOI: 10.1016/j.chemosphere.2017.10.076] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 10/10/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
3D porous N-doped reduced graphene oxide (N-rGO) aerogels were synthesized by a hydrothermal reduction of graphene oxide (GO) with urea and following freeze-drying process. N-rGO aerogels have a high BET surface of 499.70 m2/g and a high N doping content (5.93-7.46 at%) including three kinds of N (graphitic, pyridinic and pyrrolic). Their high catalytic performance for phenol oxidation in aqueous solution was investigated by catalytic activation of persulfate (PS). We have demonstrated that N-rGO aerogels are promising metal-free catalysts for phenol removal. Kinetics studies indicate that phenol degradation follows first-order reaction kinetics with the reaction rate constant of 0.16799 min-1 for N-rGO-A(1:30). Interestingly, the comparison of direct catalytic oxidation with adsorption-catalytic oxidation experiments indicates that adsorption plays an important role in the catalytic oxidation of phenol by decreasing the phenol degradation time. Spin density and adsorption modeling demonstrates that graphitic N in N-rGO plays the most important role for the catalytic performance by inducing high positive charge densities to adjacent carbon atoms and facilitating phenol adsorption on these carbon sites. Furthermore, the activation mechanism of persulfate (PS) on N-rGO was first investigated by DFT method and PS can be activated to generate strongly oxidative radical (SO4·-) by transferring electrons to N-rGO.
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Affiliation(s)
- Xiaohua Ren
- SDU & Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China; Weifang University of Science and Technology, Weifang 262700, China
| | - Huanhuan Guo
- SDU & Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Jinkui Feng
- SDU & Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Pengchao Si
- SDU & Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China
| | - Lin Zhang
- SDU & Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
| | - Lijie Ci
- SDU & Rice Joint Center for Carbon Nanomaterials, Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, China.
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23
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Dovbeshko G, Kovalska E, Miśta W, Klimkiewicz R. Bimolecular condensation reactions of butan-1-ol on Ag–CeO2 decorated multiwalled carbon nanotubes. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1254-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Janas D, Stando G. Unexpectedly strong hydrophilic character of free-standing thin films from carbon nanotubes. Sci Rep 2017; 7:12274. [PMID: 28947791 PMCID: PMC5612993 DOI: 10.1038/s41598-017-12443-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 09/11/2017] [Indexed: 11/09/2022] Open
Abstract
We report on the development of a method of formation of hydrophilic carbon nanotube (CNT) films. The technique is simple, straightforward and does not require specialized equipment or use of harsh chemical compounds. Elimination of the need for oxidizing agents has paramount implications because it preserves the inherent CNT properties. A reference study, in which the traditional method of oxidation of CNTs was used to introduce functional groups, gave smaller reduction of water contact angle and made a negative influence on the surface chemistry. From the practical point of view, this method is an important step towards implementation of CNTs in the real life by making them more compatible with interface materials. Interestingly, the method gives high level of control over the surface character of CNT films and hydrophilic character can be precisely patterned where required.
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Affiliation(s)
- Dawid Janas
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland.
| | - Grzegorz Stando
- Department of Chemistry, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland
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26
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Buan MEM, Muthuswamy N, Walmsley JC, Chen D, Rønning M. Nitrogen‐doped Carbon Nanofibers for the Oxygen Reduction Reaction: Importance of the Iron Growth Catalyst Phase. ChemCatChem 2017. [DOI: 10.1002/cctc.201601585] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Marthe E. M. Buan
- Department of Chemical EngineeringNorwegian University of Science and Technology 7491 Trondheim Norway
| | - Navaneethan Muthuswamy
- Department of Chemical EngineeringNorwegian University of Science and Technology 7491 Trondheim Norway
| | - John C. Walmsley
- SINTEF Materials and Chemistry Høgskoleringen 5 7465 Trondheim Norway
| | - De Chen
- Department of Chemical EngineeringNorwegian University of Science and Technology 7491 Trondheim Norway
| | - Magnus Rønning
- Department of Chemical EngineeringNorwegian University of Science and Technology 7491 Trondheim Norway
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27
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Vishwakarma R, Shinde SM, Rosmi MS, Takahashi C, Papon R, Mahyavanshi RD, Ishii Y, Kawasaki S, Kalita G, Tanemura M. Influence of oxygen on nitrogen-doped carbon nanofiber growth directly on nichrome foil. NANOTECHNOLOGY 2016; 27:365602. [PMID: 27479000 DOI: 10.1088/0957-4484/27/36/365602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The synthesis of various nitrogen-doped (N-doped) carbon nanostructures has been significantly explored as an alternative material for energy storage and metal-free catalytic applications. Here, we reveal a direct growth technique of N-doped carbon nanofibers (CNFs) on flexible nichrome (NiCr) foil using melamine as a solid precursor. Highly reactive Cr plays a critical role in the nanofiber growth process on the metal alloy foil in an atmospheric pressure chemical vapor deposition (APCVD) process. Oxidation of Cr occurs in the presence of oxygen impurities, where Ni nanoparticles are formed on the surface and assist the growth of nanofibers. Energy-dispersive x-ray spectroscopy (EDXS) and x-ray photoelectron spectroscopy (XPS) clearly show the transformation process of the NiCr foil surface with annealing in the presence of oxygen impurities. The structural change of NiCr foil assists one-dimensional (1D) CNF growth, rather than the lateral two-dimensional (2D) growth. The incorporation of distinctive graphitic and pyridinic nitrogen in the graphene lattice are observed in the synthesized nanofiber, owing to better nitrogen solubility. Our finding shows an effective approach for the synthesis of highly N-doped carbon nanostructures directly on Cr-based metal alloys for various applications.
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Affiliation(s)
- Riteshkumar Vishwakarma
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Kuźnik N, Tomczyk MM. Multiwalled carbon nanotube hybrids as MRI contrast agents. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:1086-103. [PMID: 27547627 PMCID: PMC4979685 DOI: 10.3762/bjnano.7.102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 07/07/2016] [Indexed: 05/09/2023]
Abstract
Magnetic resonance imaging (MRI) is one of the most commonly used tomography techniques in medical diagnosis due to the non-invasive character, the high spatial resolution and the possibility of soft tissue imaging. Contrast agents, such as gadolinium complexes and superparamagnetic iron oxides, are administered to spotlight certain organs and their pathologies. Many new models have been proposed that reduce side effects and required doses of these already clinically approved contrast agents. These new candidates often possess additional functionalities, e.g., the possibility of bioactivation upon action of particular stimuli, thus serving as smart molecular probes, or the coupling with therapeutic agents and therefore combining both a diagnostic and therapeutic role. Nanomaterials have been found to be an excellent scaffold for contrast agents, among which carbon nanotubes offer vast possibilities. The morphology of multiwalled carbon nanotubes (MWCNTs), their magnetic and electronic properties, the possibility of different functionalization and the potential to penetrate cell membranes result in a unique and very attractive candidate for a new MRI contrast agent. In this review we describe the different issues connected with MWCNT hybrids designed for MRI contrast agents, i.e., their synthesis and magnetic and dispersion properties, as well as both in vitro and in vivo behavior, which is important for diagnostic purposes. An introduction to MRI contrast agent theory is elaborated here in order to point to the specific expectations regarding nanomaterials. Finally, we propose a promising, general model of MWCNTs as MRI contrast agent candidates based on the studies presented here and supported by appropriate theories.
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Affiliation(s)
- Nikodem Kuźnik
- Silesian University of Technology, Faculty of Chemistry, M. Strzody 9, 44-100 Gliwice, Poland
| | - Mateusz Michał Tomczyk
- Silesian University of Technology, Faculty of Chemistry, M. Strzody 9, 44-100 Gliwice, Poland
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Liu H, Hu H, Wang J, Niehoff P, He X, Paillard E, Eder D, Winter M, Li J. Hierarchical Ternary MoO2
/MoS2
/Heteroatom-Doped Carbon Hybrid Materials for High-Performance Lithium-Ion Storage. ChemElectroChem 2016. [DOI: 10.1002/celc.201600062] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Haidong Liu
- MEET Battery Research Center; University of Muenster; Corrensstr. 46 48149 Muenster Germany
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
| | - Huating Hu
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
| | - Jun Wang
- MEET Battery Research Center; University of Muenster; Corrensstr. 46 48149 Muenster Germany
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
| | - Philip Niehoff
- MEET Battery Research Center; University of Muenster; Corrensstr. 46 48149 Muenster Germany
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
| | - Xin He
- MEET Battery Research Center; University of Muenster; Corrensstr. 46 48149 Muenster Germany
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
| | - Elie Paillard
- Helmholtz Institute Münster - Forschungszentrum Jülich GmbH (IEK-12); Corrensstr. 46 48149 Münster Germany
| | - Dominik Eder
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
| | - Martin Winter
- MEET Battery Research Center; University of Muenster; Corrensstr. 46 48149 Muenster Germany
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
- Helmholtz Institute Münster - Forschungszentrum Jülich GmbH (IEK-12); Corrensstr. 46 48149 Münster Germany
| | - Jie Li
- MEET Battery Research Center; University of Muenster; Corrensstr. 46 48149 Muenster Germany
- Institute of Physical Chemistry; University of Muenster; Corrensstr. 28/30 48149 Muenster Germany
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30
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Krukiewicz K, Bulmer JS, Koziol KK, Zak JK. Charging and discharging of the electrochemically swelled, aligned carbon nanotube fibers. Electrochem commun 2016. [DOI: 10.1016/j.elecom.2016.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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31
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Kuźnik N, Tomczyk MM, Wyskocka M, Przypis Ł, Herman AP, Jędrysiak R, Koziol KK, Boncel S. Amalgamation of complex iron(III) ions and iron nanoclusters with MWCNTs as a route to potential T2 MRI contrast agents. Int J Nanomedicine 2015; 10:3581-91. [PMID: 25999719 PMCID: PMC4437606 DOI: 10.2147/ijn.s81381] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Iron-filled multiwall carbon nanotubes (Fe@MWCNTs) were functionalized toward a variety of potential magnetic resonance imaging contrast agents. Oxidized Fe@MWNCTs were covered with PEG5000 via direct esterification or using acyl chloride derivatives. Alternatively, the latter were functionalized with an aminophenol ligand (Fe@O-MWCNT-L). Moreover, pristine Fe@MWCNTs were functionalized with N-phenylaziridine groups (Fe@f-MWCNT) via [2+1] cycloaddition of nitrene. All of these chemically modified nanotubes served as a vehicle for anchoring Fe3+ ions. The new hybrids – Fe(III)/Fe@(f-/O-)MWCNTs – containing 6%–14% of the “tethered” Fe3+ions were studied in terms of the acceleration of relaxation of water protons in nuclear magnetic resonance. The highest transverse relaxivity r2=63.9±0.9 mL mg−1 s−1 was recorded for Fe(III)/Fe@O-MWCNT-L, while for Fe(III)/Fe@f-MWCNT, with r2=57.9±2.9 mL mg−1 s−1, the highest impact of the anchored Fe(III) ions was observed. The T1/T2 ratio of 30–100 found for all of the nanotube hybrids presented in this work is a very important factor for their potential application as T2 contrast agents. Increased stability of the hybrids was confirmed by ultraviolet–visible spectrophotometry.
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Affiliation(s)
- Nikodem Kuźnik
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
| | - Mateusz M Tomczyk
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
| | - Marzena Wyskocka
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
| | - Łukasz Przypis
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
| | - Artur P Herman
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
| | - Rafał Jędrysiak
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
| | - Krzysztof K Koziol
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
| | - Sławomir Boncel
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Faculty of Chemistry, Silesian University of Technology, Gliwice, Poland
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Bukola S, Merzougui B, Akinpelu A, Laoui T, Hedhili MN, Swain GM, Shao M. Fe-N-C Electrocatalysts for Oxygen Reduction Reaction Synthesized by Using Aniline Salt and Fe 3+ /H 2 O 2 Catalytic System. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.08.152] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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