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Ye J, Wang Y, Cheng X, Chen G, Zhang D, Chen X, Chen L, Tang P, Xie W, Liu B. Removal of 6-methylquinoline from shale gas wastewater using electrochemical carbon nanotubes filter. CHEMOSPHERE 2024; 359:142259. [PMID: 38723692 DOI: 10.1016/j.chemosphere.2024.142259] [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: 01/20/2024] [Revised: 05/01/2024] [Accepted: 05/04/2024] [Indexed: 05/14/2024]
Abstract
6-Methylquinoline (6-MQ) is identified as a high-concentration organic compound pervasive in shale gas wastewater (SGW) and poses a significant risk of environmental pollution. In response, this study aimed to address these challenges by introducing an innovative electrochemical membrane constructed with multi-walled carbon nanotubes (CNTs) for the removal of 6-MQ. The investigation systematically explored the impact of voltage, initial pollutant concentration, and salinity on the performance of the electrochemical CNTs filter. It was found a positive correlation between removal efficiency and increasing voltage and salinity levels. Conversely, as the initial concentration of pollutants increased, the efficiency showed a diminishing trend. The electrochemical CNTs filter exhibited remarkable efficacy in both adsorption removal and electrochemical oxidation of 6-MQ. Notably, the CNTs membrane exhibited robust adsorption capabilities, evidenced by the sustained adsorption of 6-MQ for over 33 h. Furthermore, applying an electrochemical oxidation voltage of 3 V consistently maintained a removal rate exceeding 34.0% due to both direct and indirect oxidation, underscoring the sustained efficacy of the electrochemical membranes. Besides, real wastewater experiments, while displaying a reduction in removal efficiency compared to synthetic wastewater experiments, emphasized the substantial potential of the electrochemical CNTs filter for practical applications. This study underscores the significant promise of electrochemical membranes in addressing low molecular weight contaminants in SGW, contributing valuable insights for advancing SGW treatment strategies.
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Affiliation(s)
- Jinzhong Ye
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Ying Wang
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Xin Cheng
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Guijing Chen
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Di Zhang
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Xin Chen
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Liang Chen
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China
| | - Peng Tang
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China.
| | - Wancen Xie
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Department of Municipal Engineering, College of Civil Engineering, Sichuan Agricultural University, Chengdu, 611830, China
| | - Baicang Liu
- State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Institute for Disaster Management and Reconstruction, Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu, Sichuan, 610207, China; Yibin Institute of Industrial Technology, Sichuan University Yibin Park, Section 2, Lingang Ave., Cuiping District, Yibin, Sichuan, 644000, China.
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Krasley A, Li E, Galeana JM, Bulumulla C, Beyene AG, Demirer GS. Carbon Nanomaterial Fluorescent Probes and Their Biological Applications. Chem Rev 2024; 124:3085-3185. [PMID: 38478064 PMCID: PMC10979413 DOI: 10.1021/acs.chemrev.3c00581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 02/01/2024] [Accepted: 02/09/2024] [Indexed: 03/28/2024]
Abstract
Fluorescent carbon nanomaterials have broadly useful chemical and photophysical attributes that are conducive to applications in biology. In this review, we focus on materials whose photophysics allow for the use of these materials in biomedical and environmental applications, with emphasis on imaging, biosensing, and cargo delivery. The review focuses primarily on graphitic carbon nanomaterials including graphene and its derivatives, carbon nanotubes, as well as carbon dots and carbon nanohoops. Recent advances in and future prospects of these fields are discussed at depth, and where appropriate, references to reviews pertaining to older literature are provided.
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Affiliation(s)
- Andrew
T. Krasley
- Janelia
Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, United States
| | - Eugene Li
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
| | - Jesus M. Galeana
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
| | - Chandima Bulumulla
- Janelia
Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, United States
| | - Abraham G. Beyene
- Janelia
Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, United States
| | - Gozde S. Demirer
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
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3
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Luo X, Xie H, Cao J, Lu Y, Tao S, Meng Z, Pu L, Sun L, He P, Liu Z. Enhanced microwave absorption performance of Fe 3Al flakes by optimizing the carbon nanotube coatings. RSC Adv 2024; 14:10687-10696. [PMID: 38567341 PMCID: PMC10985793 DOI: 10.1039/d4ra00955j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/21/2024] [Indexed: 04/04/2024] Open
Abstract
Fe3Al is a good magnetic loss absorber for microwave absorption. However, due to the relatively high density and poor impedance matching ratio, the potential of Fe3Al cannot be fully released. Herein, a dielectric loss absorber of carbon nanotubes (CNTs) is coupled with Fe3Al to form Fe3Al/CNTs composite absorbers. CNTs are randomly tangled and coated on the surface of the Fe3Al flakes, forming a connecting conductive network. By carefully tuning the content of CNTs, the optimized Fe3Al/CNTs composite absorber with 1.5% of CNTs can combine both magnetic loss and dielectric loss mechanisms, thus achieving an impedance matching ratio close to 1 while keeping strong attenuation for enhanced microwave absorption. As a result, an effective absorption bandwidth (RL ≤ -10 dB) of 4.73 GHz at a thickness of 2 mm is achieved.
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Affiliation(s)
- Xixi Luo
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Hui Xie
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Jing Cao
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Yaru Lu
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an 710072 China
| | - Shiping Tao
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Zhixing Meng
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Lingna Pu
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Liyang Sun
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Pengjia He
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Ziyan Liu
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
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Upreti BB, Kamboj N, Dey RS. Laser-irradiated carbonized polyaniline-N-doped graphene heterostructure improves the cyclability of on-chip microsupercapacitor. NANOSCALE 2023; 15:15268-15278. [PMID: 37675630 DOI: 10.1039/d3nr02862c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Laser-irradiated graphene-based heterostructures have attracted significant attention for the fabrication of highly conducting and stable metal-free energy storage devices. Heteroatom doping on the graphene backbone has proven to have better charge storage properties. Among other heteroatoms, nitrogen-doped graphene (NG) has been extensively researched due to its several advanced properties while maintaining the original characteristics of graphene for energy storage applications. However, NG is generally prepared via chemical vapor deposition or high temperature pyrolysis method, which gives low yield and has a complex operation route. In this work, first a polyaniline-reduce graphene oxide (PANI-rGO) heterostructure was prepared via in situ electrochemical polymerization, followed by the deposition process. In the next step, laser-irradiation process was employed to carbonize polyaniline as well as doping of nitrogen on the graphene film, simultaneously. For the very first time, laser-irradiated carbonization of PANI on NG (cPANI-NG) heterostructure was utilized for microsupercapacitor (MSC). The as-prepared cPANI-NG-MSC shows extremely high cycling stability with a capacitance enhancement of 135% of its initial capacitance after 70 000 continuous charge-discharge cycles. It is very interesting to know the origin of the capacitance enhancement, which results from the change of pyrrolic N in NG-MSC to the pyridinic and graphitic N. An on-chip NG-MSC exhibits an excellent charge storage capacitance of 43.5 mF cm-2 at a current density of 0.5 mA cm-2 and shows impressive power delivery at a very high scan rate of 100 V s-1. The excellent rate capability of the MSC shows capacitance retention up to 70.1% with the variation of current density. This unique approach to fabricate NG-MSC can have a broad range of applications as energy storage devices in the electronics market, as demonstrated by glowing a commercial red LED.
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Affiliation(s)
| | - Navpreet Kamboj
- Institute of Nano Science and Technology (INST), Mohali-140306, Punjab, India.
| | - Ramendra Sundar Dey
- Institute of Nano Science and Technology (INST), Mohali-140306, Punjab, India.
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5
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Fazekas ÁF, Gyulavári T, Pap Z, Bodor A, Laczi K, Perei K, Illés E, László Z, Veréb G. Effects of Different TiO 2/CNT Coatings of PVDF Membranes on the Filtration of Oil-Contaminated Wastewaters. MEMBRANES 2023; 13:812. [PMID: 37887984 PMCID: PMC10608089 DOI: 10.3390/membranes13100812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023]
Abstract
Six different TiO2/CNT nanocomposite-coated polyvinylidene-fluoride (PVDF) microfilter membranes (including -OH or/and -COOH functionalized CNTs) were evaluated in terms of their performance in filtering oil-in-water emulsions. In the early stages of filtration, until reaching a volume reduction ratio (VRR) of ~1.5, the membranes coated with functionalized CNT-containing composites provided significantly higher fluxes than the non-functionalized ones, proving the beneficial effect of the surface modifications of the CNTs. Additionally, until the end of the filtration experiments (VRR = 5), notable flux enhancements were achieved with both TiO2 (~50%) and TiO2/CNT-coated membranes (up to ~300%), compared to the uncoated membrane. The irreversible filtration resistances of the membranes indicated that both the hydrophilicity and surface charge (zeta potential) played a crucial role in membrane fouling. However, a sharp and significant flux decrease (~90% flux reduction ratio) was observed for all membranes until reaching a VRR of 1.1-1.8, which could be attributed to the chemical composition of the oil. Gas chromatography measurements revealed a lack of hydrocarbon derivatives with polar molecular fractions (which can act as natural emulsifiers), resulting in significant coalescent ability (and less stable emulsion). Therefore, this led to a more compact cake layer formation on the surface of the membranes (compared to a previous study). It was also demonstrated that all membranes had excellent purification efficiency (97-99.8%) regarding the turbidity, but the effectiveness of the chemical oxygen demand reduction was slightly lower, ranging from 93.7% to 98%.
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Affiliation(s)
- Ákos Ferenc Fazekas
- Department of Biosystem Engineering, Faculty of Engineering, University of Szeged, Moszkvai Blvd. 9., H-6725 Szeged, Hungary
- Doctoral School of Environmental Sciences, University of Szeged, Rerrich Béla Sq. 1, H-6720 Szeged, Hungary
| | - Tamás Gyulavári
- Department of Applied and Environmental Chemistry, Institute of Chemistry, University of Szeged, Rerrich Béla Sq. 1, H-6720 Szeged, Hungary
| | - Zsolt Pap
- Department of Applied and Environmental Chemistry, Institute of Chemistry, University of Szeged, Rerrich Béla Sq. 1, H-6720 Szeged, Hungary
- Centre of Nanostructured Materials and Bio-Nano Interfaces, Institute for Interdisciplinary, Research on Bio-Nano-Sciences, Treboniu Laurian 42, RO-400271 Cluj-Napoca, Romania
- STAR-UBB Institute, Mihail Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
| | - Attila Bodor
- Department of Biotechnology, Institute of Biology, University of Szeged, Közép Alley 52, H-6726 Szeged, Hungary
- Institute of Biophysics, Biological Research Centre, Hungarian Research Network, Temesvári Blvd. 62, H-6726 Szeged, Hungary
| | - Krisztián Laczi
- Department of Biotechnology, Institute of Biology, University of Szeged, Közép Alley 52, H-6726 Szeged, Hungary
| | - Katalin Perei
- Department of Biotechnology, Institute of Biology, University of Szeged, Közép Alley 52, H-6726 Szeged, Hungary
| | - Erzsébet Illés
- Department of Food Engineering, Faculty of Engineering, University of Szeged, Mars Sq. 7, H-6724 Szeged, Hungary
| | - Zsuzsanna László
- Department of Biosystem Engineering, Faculty of Engineering, University of Szeged, Moszkvai Blvd. 9., H-6725 Szeged, Hungary
| | - Gábor Veréb
- Department of Biosystem Engineering, Faculty of Engineering, University of Szeged, Moszkvai Blvd. 9., H-6725 Szeged, Hungary
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Ryan S, Browne MP, Zhussupbekova A, Spurling D, McKeown L, Douglas-Henry D, Prendeville L, Vaesen S, Schmitt W, Shvets I, Nicolosi V. Single walled carbon nanotube functionalisation in printed supercapacitor devices and shielding effect of Tin(II) Oxide. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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Marin-Beloqui JM, Gómez S, Gonev HI, Comí M, Al-Hashimi M, Clarke TM. Truncated conjugation in fused heterocycle-based conducting polymers: when greater planarity does not enhance conjugation. Chem Sci 2023; 14:812-821. [PMID: 36755723 PMCID: PMC9890783 DOI: 10.1039/d2sc06271b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 11/28/2022] [Indexed: 12/13/2022] Open
Abstract
One of the main assumptions in the design of new conjugated polymer materials for their use in organic electronics is that higher coplanarity leads to greater conjugation along the polymer backbone. Conventionally, a more planar monomer structure induces a larger backbone coplanarity, thus leading to a greater overlap of the carbon π-orbitals and therefore a higher degree of π-electron delocalisation. However, here we present a case that counters the validity of this assumption. Different diselenophene-based polymers were studied where one polymer possesses two selenophene rings fused together to create a more rigid, planar structure. The effects of this greater polymer coplanarity were examined using Raman spectroscopy and theoretical calculations. Raman spectra showed a large difference between the vibrational modes of the fused and unfused polymers, indicating very different electronic structures. Resonance Raman spectroscopy confirmed the rigidity of the fused selenophene polymer and also revealed, by studying the excitation profiles of the different bands, the presence of two shorter, uncoupled conjugation pathways. Supported by Density Functional Theory (DFT) calculations, we have demonstrated that the reason for this lack of conjugation is a distortion of the selenophene rings due to the induced planarity, forming a new truncated conjugation pathway through the selenophene β-position and bypassing the beneficial α-position. This effect was studied using DFT in an ample range of derivatives, where substitution of the selenium atom with other heteroatoms still maintained the same unconventional conjugation-planarity relationship, confirming the generality of this phenomenon. This work establishes an important structure-property relationship for conjugated polymers that will help rational design of more efficient organic electronics materials.
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Affiliation(s)
- Jose Manuel Marin-Beloqui
- Department of Chemistry, University College London Christopher Ingold Building London WC1H 0AJ UK .,Department of Physical Chemistry, University of Malaga Blvrd Louis Pasteur 31 29010 Malaga Spain
| | - Sandra Gómez
- Department of Physical Chemistry, University of SalamancaCaidos Sq.37008SalamancaSpain
| | - Hristo Ivov Gonev
- Department of Chemistry, University College London Christopher Ingold Building London WC1H 0AJ UK
| | - Marc Comí
- Department of Chemistry, Texas A&M University at QatarEducation City, P. O. Box 23874DohaQatar
| | - Mohammed Al-Hashimi
- Department of Chemistry, Texas A&M University at QatarEducation City, P. O. Box 23874DohaQatar
| | - Tracey M. Clarke
- Department of Chemistry, University College LondonChristopher Ingold BuildingLondon WC1H 0AJUK
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Liu F, Mao W, Dong W, Li D, Liu Q, Deng B. The effect of functionalized multi-walled carbon tube/polyvinylidene fluoride support membrane on the formation and performance of polyamide film. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03249-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Park M, Choi IS, Ju SY. Quantification and removal of carbonaceous impurities in a surfactant-assisted carbon nanotube dispersion and its implication on electronic properties. NANOSCALE ADVANCES 2022; 4:3537-3548. [PMID: 36134357 PMCID: PMC9400498 DOI: 10.1039/d2na00153e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 06/10/2022] [Indexed: 06/16/2023]
Abstract
Carbonaceous impurities (CIs) affect the optoelectronic properties as well as the ability to use absorption spectroscopy to estimate the metallic content of a single-walled carbon nanotube (SWNT) dispersion. Therefore, a method for the accurate quantification and removal of CIs is required. We have devised methods to characterize and quantify CIs present in SWNT batches and to determine the effects of CIs on the optical and electrical properties of SWNT. Quantitative determination of CIs stems from the finding that chloroform selectively disperses CIs present in SWNT batches. CIs separated by dispersing the as-purchased SWNT batch in chloroform have the morphology of defective and agglomerated few-layered graphenes, whose sizes and locations depend on SWNT batches. Moreover, CIs exhibit a featureless UV-vis-mid-wavelength IR (MWIR) absorption curve and an extinction coefficient comparable to graphenes and show difference with carbon black, which is frequently used as the CI reference. The MWIR region that shows least absorptions caused by the transition of various SWNT types was utilized to assess the significant contribution made by CIs present in a surfactant-assisted SWNT dispersion, showing about 12-19 wt% of CIs in various SWNT dispersions. In addition, the extraction of CIs with chloroform results in a highly purified SWNT batch without any diameter distribution change originating from oxidative damage as compared to the commercially available purified SWNT batch. Finally, we found that increasing the weight of CIs present in a SWNT dispersion strongly lowers the thermal conductivity of a SWNT film when compared with the electrical conductivity. This study provides a way to understand the negative effects that CI has on the optoelectronic properties of SWNTs as well as the beneficial effects of excluding ubiquitous CIs in SWNTs batches.
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Affiliation(s)
- Minsuk Park
- Department of Chemistry, Yonsei University 50 Yonsei-ro Seodaemun-Gu Seoul 03722 Republic of Korea +82-2-2123-5639
| | - In-Seung Choi
- Department of Chemistry, Yonsei University 50 Yonsei-ro Seodaemun-Gu Seoul 03722 Republic of Korea +82-2-2123-5639
| | - Sang-Yong Ju
- Department of Chemistry, Yonsei University 50 Yonsei-ro Seodaemun-Gu Seoul 03722 Republic of Korea +82-2-2123-5639
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10
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Tian X, Huang H, Zhang H, Yan Y. Preparation of structured N-CNTs/PSSF composite catalyst to activate peroxymonosulfate for phenol degradation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Ionization and electron excitation of C 60 in a carbon nanotube: A variable temperature/voltage transmission electron microscopic study. Proc Natl Acad Sci U S A 2022; 119:e2200290119. [PMID: 35377799 PMCID: PMC9169795 DOI: 10.1073/pnas.2200290119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The destruction of specimen molecules by an electron beam (e-beam) is either beneficial, as in mass spectrometry capitalizing on ion formation, or deleterious, as in electron microscopy. In the latter application, the e-beam not only produces the specimen image, but also causes information loss upon prolonged irradiation. However, the atomistic mechanism of such loss has been unclear. Performing single-molecule kinetic analysis of C60 dimerization in a carbon nanotube (CNT) under variable-temperature/voltage conditions, we identified three reactive species—that is, radical cation, singlet, and triplet excited states—reacting competitively as the voltage and the properties of the CNT were changed. The key enabler was in situ continuous recording of the whole reaction process, suggesting an upcoming new era of “cinematic chemistry.” There is increasing attention to chemical applications of transmission electron microscopy, which is often plagued by radiation damage. The damage in organic matter predominantly occurs via radiolysis. Although radiolysis is highly important, previous studies on radiolysis have largely been descriptive and qualitative, lacking in such fundamental information as the product structure, the influence of the energy of the electrons, and the reaction kinetics. We need a chemically well-defined system to obtain such data and have chosen as a model a variable-temperature and variable-voltage (VT/VV) study of the [2 + 2] dimerization of a van der Waals dimer [60]fullerene (C60) to C120 in a carbon nanotube (CNT), as studied for several hundred individual reaction events at atomic resolution. We report here the identification of five reaction pathways that serve as mechanistic models of radiolysis damage. Two of them occur via a radical cation of the specimen generated by specimen ionization, and three involve singlet or triplet excited states of the specimen, as initiated by electron excitation of the CNT, followed by energy transfer to the specimen. The [2 + 2] product was identified by measuring the distance between the two C60 moieties, and the mechanisms were distinguished by the pre-exponential factor and the Arrhenius activation energy—the standard protocol of chemical kinetic studies. The results illustrate the importance of VT/VV kinetic analysis in the studies of radiation damage and show that chemical ionization and electron excitation are inseparable, but different, mechanisms of radiation damage, which has so far been classified loosely under the single term “ionization.”
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12
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Nitrites Detection with Sensors Processed via Matrix-Assisted Pulsed Laser Evaporation. NANOMATERIALS 2022; 12:nano12071138. [PMID: 35407255 PMCID: PMC9000718 DOI: 10.3390/nano12071138] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/21/2022] [Accepted: 03/24/2022] [Indexed: 12/10/2022]
Abstract
This work is focused on the application of a laser-based technique, i.e., matrix-assisted pulsed laser evaporation (MAPLE) for the development of electrochemical sensors aimed at the detection of nitrites in water. Commercial carbon-based screen-printed electrodes were modified by MAPLE via the application of a newly developed composite coating with different concentrations of carbon nanotubes (CNTs), chitosan, and iron (II) phthalocyanine (C32H16FeN8). The performance of the newly fabricated composite coatings was evaluated both by investigating the morphology and surface chemistry of the coating, and by determining the electro-catalytic oxidation properties of nitrite with bare and modified commercial carbon-based screen-printed electrode. It was found that the combined effect of CNTs with chitosan and C32H16FeN8 significantly improves the electrochemical response towards the oxidation of nitrite. In addition, the MAPLE modified screen-printed electrodes have a limit of detection of 0.12 µM, which make them extremely useful for the detection of nitrite traces.
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Siva Kumar OVPR, Sundaramoorthy A, Padmapriya VS, Raman DN. Preparation of freestanding films from SWCNT/PANI nanocomposites using different blending techniques and characterization of their EMI shielding effectiveness in X-band. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2021.2012680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- O. V. P. R. Siva Kumar
- Department of Electronics and Communication Engineering, Geethanjali College of Engineering and Technology, Medchal District, Telangana, India
| | - Arunmetha Sundaramoorthy
- Department of Electronics and Communication Engineering, K.L.E.F. (deemed to be University), Guntur District, Andhra Pradesh, India
| | - V. S. Padmapriya
- Department of Electronics and Communication Engineering, Geethanjali College of Engineering and Technology, Medchal District, Telangana, India
| | - Dhineshbabu Nattanmai Raman
- Department of Electronics and Communication Engineering, Aditya Engineering College, Surampalem, Andhra Pradesh, India
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14
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EntadaGigas seeds mediated synthesis of carbon for dielectric and sensing applications. SENSORS INTERNATIONAL 2022. [DOI: 10.1016/j.sintl.2022.100162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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15
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Ji K, Zhang Y, Li H, Qi T, Li X, Liu Q, Chen S. Anchoring HFO nanoparticles on MWCNTs as high electron transfer composite adsorbent for the removal of H2S at low temperature. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119221] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Mark LO, Dorn RW, McDermott WP, Agbi TO, Altvater NR, Jansen J, Lebrón‐Rodríguez EA, Cendejas MC, Rossini AJ, Hermans I. Highly Selective Carbon‐Supported Boron for Oxidative Dehydrogenation of Propane. ChemCatChem 2021. [DOI: 10.1002/cctc.202100759] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lesli O. Mark
- Department of Chemistry University of Wisconsin – Madison 1101 University Avenue Madison WI 53706 USA
| | - Rick W. Dorn
- Department of Chemistry Iowa State University 2438 Pammel Dr. Ames IA 50011 USA
- U.S. Department of Energy Ames Laboratory 3111 Iowa State University Ames IA 50011 USA
| | - William P. McDermott
- Department of Chemistry University of Wisconsin – Madison 1101 University Avenue Madison WI 53706 USA
| | - Theodore O. Agbi
- Department of Chemical and Biological Engineering University of Wisconsin – Madison 1415 Engineering Dr. Madison WI 53706 USA
| | - Natalie R. Altvater
- Department of Chemical and Biological Engineering University of Wisconsin – Madison 1415 Engineering Dr. Madison WI 53706 USA
| | - Jacob Jansen
- Department of Chemistry University of Wisconsin – Madison 1101 University Avenue Madison WI 53706 USA
| | - Edgard A. Lebrón‐Rodríguez
- Department of Chemical and Biological Engineering University of Wisconsin – Madison 1415 Engineering Dr. Madison WI 53706 USA
| | - Melissa C. Cendejas
- Department of Chemistry University of Wisconsin – Madison 1101 University Avenue Madison WI 53706 USA
| | - Aaron J. Rossini
- Department of Chemistry Iowa State University 2438 Pammel Dr. Ames IA 50011 USA
- U.S. Department of Energy Ames Laboratory 3111 Iowa State University Ames IA 50011 USA
| | - Ive Hermans
- Department of Chemistry University of Wisconsin – Madison 1101 University Avenue Madison WI 53706 USA
- Department of Chemical and Biological Engineering University of Wisconsin – Madison 1415 Engineering Dr. Madison WI 53706 USA
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17
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Benko A, Duch J, Gajewska M, Marzec M, Bernasik A, Nocuń M, Piskorz W, Kotarba A. Covalently bonded surface functional groups on carbon nanotubes: from molecular modeling to practical applications. NANOSCALE 2021; 13:10152-10166. [PMID: 34075933 DOI: 10.1039/d0nr09057c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The aim of this work was to investigate how chemical functionalization affects the electronic properties of multi-walled carbon nanotubes, altering the electrophoretic deposition process: a method of choice for the fabrication of high quality, all-carbon nanotube (CNT) layers. Wet chemistry methods were applied to modify the surfaces of CNTs by insertion of various oxygen- and nitrogen-containing groups. Transmission electron microscopy revealed no significant changes in the material morphology, while X-ray photoelectron spectroscopy and Raman spectroscopy showed that changes in the chemical composition did not translate to the changes in the structure. Molecularly modelled optimized surface functional group geometries and electron density distributions allowed the calculation of the dipole moments (-COOH = 0.77; -OH = 1.65; -CON(CH3CH2)2 = 3.33; -CONH2 = 2.00; -NH2 = 0.78). Due to their polarity, the introduction of surface functional groups resulted in significant modifications of the electronic properties of CNTs, as elucidated by work function measurements via the Kelvin method and ultraviolet photoelectron spectroscopy. The work function changed from 4.6 eV (raw CNTs) to 4.94 eV for the -OH functionalized CNTs and 4.3 eV for the CNTs functionalized with -CON(CH3CH2), and was inversely proportional to the dipole moment values. Finally, using CNT dispersions, electrophoretic deposition was conducted, allowing the correlation of the work function of CNTs and the measured electrophoretic current with the impact on the deposits' qualities. Thus, a rational background for the development of carbon-based biomaterials was provided.
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Affiliation(s)
- Aleksandra Benko
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, 30 A. Mickiewicz Ave., 30-059 Krakow, Poland.
| | - Joanna Duch
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland.
| | - Marta Gajewska
- AGH University of Science and Technology Academic Centre for Materials and Nanotechnology, 30 A. Mickiewicz Ave., 30-059 Krakow, Poland
| | - Mateusz Marzec
- AGH University of Science and Technology Academic Centre for Materials and Nanotechnology, 30 A. Mickiewicz Ave., 30-059 Krakow, Poland
| | - Andrzej Bernasik
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, 30 A. Mickiewicz Ave., 30-059 Krakow, Poland
| | - Marek Nocuń
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, 30 A. Mickiewicz Ave., 30-059 Krakow, Poland.
| | - Witold Piskorz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland.
| | - Andrzej Kotarba
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland.
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18
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De S, Shivangi P, Choudhury S, Fulmali AO, Ray BC, Prusty RK. Effects of fiber surface grafting by functionalized carbon nanotubes on the interfacial durability during cryogenic testing and conditioning of CFRP composites. J Appl Polym Sci 2021. [DOI: 10.1002/app.51231] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Soubhik De
- Department of Metallurgical and Materials Engineering, FRP Composite Laboratory National Institute of Technology Rourkela India
| | - P.N. Shivangi
- Department of Metallurgical and Materials Engineering, FRP Composite Laboratory National Institute of Technology Rourkela India
| | - Saswat Choudhury
- Department of Metallurgical and Materials Engineering, FRP Composite Laboratory National Institute of Technology Rourkela India
| | - Abhinav Omprakash Fulmali
- Department of Metallurgical and Materials Engineering, FRP Composite Laboratory National Institute of Technology Rourkela India
| | - Bankim Chandra Ray
- Department of Metallurgical and Materials Engineering, FRP Composite Laboratory National Institute of Technology Rourkela India
| | - Rajesh Kumar Prusty
- Department of Metallurgical and Materials Engineering, FRP Composite Laboratory National Institute of Technology Rourkela India
- Centre for Nanomaterials National Institute of Technology Rourkela India
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19
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Effect of Toluene Addition in an Electric Arc on Morphology, Surface Modification, and Oxidation Behavior of Carbon Nanohorns and Their Sedimentation in Water. NANOMATERIALS 2021; 11:nano11040992. [PMID: 33924400 PMCID: PMC8070623 DOI: 10.3390/nano11040992] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 03/29/2021] [Accepted: 04/09/2021] [Indexed: 11/17/2022]
Abstract
Carbon nanohorns (CNHs) are attractive for various applications, where a high specific surface area and long dispersion stability in water are important. In the present work, we study these parameters of CNHs prepared by arc evaporation of graphite depending on the conditions of the synthesis and subsequent oxidation in air. It is shown that the addition of toluene in the reactor during the arcing allows obtaining CNHs functionalized with −CHx groups. Heating of CNHs in air at 400 °C leads to substitution of −CHx groups for oxygen-containing groups. Moreover, the CNH endcaps are opened at 500 °C, and as a result, the specific surface area of CNHs increases 4 times. Aqueous suspensions with a concentration of oxidized CNHs of 100 µg/mL are stable for 8 months.
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20
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Daneshvar F, Chen H, Noh K, Sue HJ. Critical challenges and advances in the carbon nanotube-metal interface for next-generation electronics. NANOSCALE ADVANCES 2021; 3:942-962. [PMID: 36133297 PMCID: PMC9417627 DOI: 10.1039/d0na00822b] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 01/04/2021] [Indexed: 05/25/2023]
Abstract
Next-generation electronics can no longer solely rely on conventional materials; miniaturization of portable electronics is pushing Si-based semiconductors and metallic conductors to their operational limits, flexible displays will make common conductive metal oxide materials obsolete, and weight reduction requirement in the aerospace industry demands scientists to seek reliable low-density conductors. Excellent electrical and mechanical properties, coupled with low density, make carbon nanotubes (CNTs) attractive candidates for future electronics. However, translating these remarkable properties into commercial macroscale applications has been disappointing. To fully realize their great potential, CNTs need to be seamlessly incorporated into metallic structures or have to synergistically work alongside them which is still challenging. Here, we review the major challenges in CNT-metal systems that impede their application in electronic devices and highlight significant breakthroughs. A few key applications that can capitalize on CNT-metal structures are also discussed. We specifically focus on the interfacial interaction and materials science aspects of CNT-metal structures.
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Affiliation(s)
- Farhad Daneshvar
- Intel Ronler Acres Campus, Intel Corp. 2501 NE Century Blvd Hillsboro Oregon 97124 USA
- Polymer Technology Centre, Department of Materials Science and Engineering, Texas A&M University College Station Texas 77843 USA
| | - Hengxi Chen
- Polymer Technology Centre, Department of Materials Science and Engineering, Texas A&M University College Station Texas 77843 USA
| | - Kwanghae Noh
- Polymer Technology Centre, Department of Materials Science and Engineering, Texas A&M University College Station Texas 77843 USA
| | - Hung-Jue Sue
- Polymer Technology Centre, Department of Materials Science and Engineering, Texas A&M University College Station Texas 77843 USA
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21
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Chen Q, Zhou L, Jiang W, Fan G. Oxygenated functional group-engaged electroless deposition of ligand-free silver nanoparticles on porous carbon for efficient electrochemical non-enzymatic H 2O 2 detection. NANOSCALE 2020; 12:24495-24502. [PMID: 33320149 DOI: 10.1039/d0nr07341e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The construction of metal-carbon nanostructures with enhanced performances using traditional methods, such as pyrolysis, photolysis, impregnation-reduction, etc., generally requires additional energy input, reducing agents and capping ligands, which inevitably increase the manufacturing cost and environmental pollution. Herein, a novel one-step substrate-induced electroless deposition (SIED) strategy is developed to synthesize ligand-free Ag NPs supported on porous carbon (PC) (Ag/PC). The PC matrix enriched with oxygenated functional groups has a low work function and thus a low redox potential compared to that of Ag+ ions, which induces the auto-reduction of Ag+ ions to Ag NPs. The as-synthesized Ag/PC-6 modified electrode can be used as an excellent nonenzymatic H2O2 sensor with a broad linear range of 0.001-20 mM, a low detection limit of 0.729 μM (S/N = 3), and a high response sensitivity of 226.9 μA mM-1 cm-2, outperforming most of the reported sensor materials. Moreover, this electrode can be applied to detect trace amounts of H2O2 in juice and milk samples below the permitted residual level in food packaging and the recovery of H2O2 is 99.6% in blood serum (10%) with good reproducibility. This study proposes an efficient approach for synthesizing a highly active supported Ag electrocatalyst, which shows significant potential for practical applications.
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Affiliation(s)
- Qian Chen
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China.
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22
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Li H, Sun X, Li Y, Wang H, Li B, Liang C. Carbon nanotube-collagen@hydroxyapatite composites with improved mechanical and biological properties fabricated by a multi in situ synthesis process. Biomed Microdevices 2020; 22:64. [PMID: 32897447 DOI: 10.1007/s10544-020-00520-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A novel carbon nanotube-collagen@hydroxyapatite (CNT-Col@HA) composite with good mechanical and biological properties was fabricated successfully by a multi in situ synthesis process, which can be used to repair or replace the damaged bone tissues. The carbon nanotube (CNT)/hydroxyapatite (HA) composite powders were firstly synthesized by the in situ chemical vapor deposition method. After the acidification of CNTs, the collagen (Col) molecules were covalently grafted onto the surface of CNTs in situ by the formation of amide linkages, obtaining Col-encapsulated CNTs powders. And then, a HA layer was deposited in situ onto the Col-encapsulated CNTs to form HA- and Col-encapsulated CNTs, consequently the ideal CNT-Col@HA composite was fabricated by the powder metallurgy method, and its mechanical and biological properties were investigated. The results showed that, the multi in situ synthesis process ensured the homogeneous dispersion of CNTs in HA matrix, and via the intermediate layer of Col, the close chemical bonding between CNT reinforcements and HA matrix was obtained, thereby the flexural strength and fracture toughness of the in situ synthesized 3 wt.% CNT-Col@HA composite were increased by approximately 74.2% and 274.6% compared with those of pure HA bulk, and better cell adhesion, spreading and proliferation were also observed on the in situ synthesized CNT-Col@HA composites. Therefore, the obtained composites in this work have great potential to be applied as implant material in clinic.
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Affiliation(s)
- Haipeng Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China.,Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin, 300130, China
| | - Xiwen Sun
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Yuanjun Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Hongshui Wang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Baoe Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China.
| | - Chunyong Liang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China. .,Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin, 300130, China.
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23
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Guerrero-Sánchez J, Borbon-Nunez HA, Tiznado H, Takeuchi N. Understanding the first half-ALD cycle of the ZnO growth on hydroxyl functionalized carbon nanotubes. Phys Chem Chem Phys 2020; 22:15333-15339. [PMID: 32409803 DOI: 10.1039/d0cp00817f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the adsorption of diethylzinc on hydroxyl functionalized carbon nanotubes. This study intends to understand, at the atomic level, the initial stages of ZnO formation by atomic layer deposition. Our study begins with the molecule physisorbed on the nanotube (initial state of the reaction). The final state of this reaction is when the H atom of the hydroxyl group is abstracted and migrates to one ethyl group of diethylzinc. The oxygen atom relaxes towards the nanotube and forms a strong bond with a carbon atom, while the remaining part of the molecule forms a bond with the H atom and physisorbs on top of the ZnO unit. The probability for this process to happen is very high since the energy to desorb the diethylzinc molecule is higher than the energy needed to break down the O-H bond. Non-covalent interactions and charge density distributions are plotted to confirm the break-down, formation of bonds, and repulsion during the reaction pathway.
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Affiliation(s)
- J Guerrero-Sánchez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Apartado Postal 14, Ensenada Baja California, Código Postal 22800, Mexico.
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24
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Ethylene-Octene-Copolymer with Embedded Carbon and Organic Conductive Nanostructures for Thermoelectric Applications. Polymers (Basel) 2020; 12:polym12061316. [PMID: 32526898 PMCID: PMC7362210 DOI: 10.3390/polym12061316] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 06/02/2020] [Accepted: 06/04/2020] [Indexed: 11/18/2022] Open
Abstract
Hybrid thermoelectric composites consisting of organic ethylene-octene-copolymer matrices (EOC) and embedded inorganic pristine and functionalized multiwalled carbon nanotubes, carbon nanofibers or organic polyaniline and polypyrrole particles were used to form conductive nanostructures with thermoelectric properties, which at the same time had sufficient strength, elasticity, and stability. Oxygen doping of carbon nanotubes increased the concentration of carboxyl and C–O functional groups on the nanotube surfaces and enhanced the thermoelectric power of the respective composites by up to 150%. A thermocouple assembled from EOC composites generated electric current by heat supplied with a mere short touch of the finger. A practical application of this thermocouple was provided by a self-powered vapor sensor, for operation of which an electric current in the range of microvolts sufficed, and was readily induced by (waste) heat. The heat-induced energy ensured the functioning of this novel sensor device, which converted chemical signals elicited by the presence of heptane vapors to the electrical domain through the resistance changes of the comprising EOC composites.
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25
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Wang X, Sun M, Zhao Y, Wang C, Ma W, Wong MS, Elimelech M. In Situ Electrochemical Generation of Reactive Chlorine Species for Efficient Ultrafiltration Membrane Self-Cleaning. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:6997-7007. [PMID: 32356975 DOI: 10.1021/acs.est.0c01590] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Reactive membranes based on hydroxyl radical generation are hindered by the need for chemical dosing and complicated module and material design. Herein, we utilize an electrochemical approach featuring in situ generation of reactive (radical) chlorine species (RCS) through anodization of chloride ions for membrane self-cleaning. A hybridized carbon nanotube (CNT)-functionalized ceramic membrane (h-CNT/CM), possessing high hydrophilicity, permeability, and conductivity, was fabricated. Using carbamazepine (CBZ) as a probe, we confirmed the presence of RCS in the electrified h-CNT/CM. The rapid and complete degradation of CBZ in a single-pass ultrafiltration indicates a high localized RCS concentration within the three-dimensional porous CNT interwoven layer. We further demonstrate that the electrogeneration of RCS is a critical prestep for free chlorine (HClO and ClO-) formation. The self-cleaning efficiency of the membrane after fouling with a model organic foulant (alginate) was assessed using an electrified cross-flow membrane filtration system. The fouled h-CNT/CM exhibits a near complete water flux recovery following a short (1 min) self-cleaning with an applied voltage of 3 or 4 V and feed solutions of 100 or 10 mM sodium chloride, respectively. Considering the superior performance of the RCS-mediated self-cleaning compared to conventional membrane chemical cleaning using sodium hypochlorite, our results exemplify an effective strategy for in situ electrogeneration of RCS to achieve a highly efficient membrane self-cleaning.
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Affiliation(s)
- Xiaoxiong Wang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Meng Sun
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Yumeng Zhao
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Chi Wang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
- School of Environment, Northeast Normal University, Changchun 130024, China
| | - Wen Ma
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
| | - Michael S Wong
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005-1892, United States
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520-8286, United States
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
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26
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Sun Y, Huang J, Guo Z. A superamphiphobic surface with a hydrogen peroxide-triggered switch to antithetic fluid repellence in a liquid-liquid-air three-phase fluid system. Chem Commun (Camb) 2020; 56:4312-4315. [PMID: 32186554 DOI: 10.1039/d0cc01047b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Herein, a superamphiphobic surface with a hydrogen peroxide-triggered switch to antithetic fluid repellence is presented. Novel arbitrary superamphiphobicity in one phase to repel the other two phases from an oil-water-air system or a generalized liquid-liquid-air three-phase fluid system can be realized.
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Affiliation(s)
- Yihan Sun
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
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27
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Chen S, Ciotonea C, De Oliveira Vigier K, Jérôme F, Wojcieszak R, Dumeignil F, Marceau E, Royer S. Hydroconversion of 5‐Hydroxymethylfurfural to 2,5‐Dimethylfuran and 2,5‐Dimethyltetrahydrofuran over Non‐promoted Ni/SBA‐15. ChemCatChem 2020. [DOI: 10.1002/cctc.201902028] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shuo Chen
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 – UCCS –Unité de Catalyse et Chimie du Solide F-59000 Lille France
| | - Carmen Ciotonea
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 – UCCS –Unité de Catalyse et Chimie du Solide F-59000 Lille France
| | | | - François Jérôme
- IC2MP – UMR CNRS 7285University de Poitiers F-86000 Poitiers France
| | - Robert Wojcieszak
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 – UCCS –Unité de Catalyse et Chimie du Solide F-59000 Lille France
| | - Franck Dumeignil
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 – UCCS –Unité de Catalyse et Chimie du Solide F-59000 Lille France
| | - Eric Marceau
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 – UCCS –Unité de Catalyse et Chimie du Solide F-59000 Lille France
| | - Sebastien Royer
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 – UCCS –Unité de Catalyse et Chimie du Solide F-59000 Lille France
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28
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Zhang Q, Li S, Wang C, Chang HC, Guo R. Carbon nanotube-based mixed-matrix membranes with supramolecularly engineered interface for enhanced gas separation performance. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117794] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Kim Y, Yang E, Park H, Choi H. Anti-biofouling effect of a thin film nanocomposite membrane with a functionalized-carbon-nanotube-blended polymeric support for the pressure-retarded osmosis process. RSC Adv 2020; 10:5697-5703. [PMID: 35497439 PMCID: PMC9049229 DOI: 10.1039/c9ra08870a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 01/28/2020] [Indexed: 12/24/2022] Open
Abstract
In this study, the anti-biofouling effect of a thin film nanocomposite (TFN) membrane with a functionalized-carbon-nanotube-blended polymeric support layer was analyzed to determine the applicability of this membrane for the pressure-retarded osmosis (PRO) process. The anti-biofouling property of TFN membranes for the PRO process was characterized by SEM, FTIR, and AFM, as well as contact angle measurements and zeta potential analysis of the bottom side of the support layer. The anti-biofouling effect of the fabricated membrane for the PRO process was analyzed by bacterial attachment tests on the bottom surface of the support layer and biofouling tests in a cross-flow operation system in the PRO mode (AL-DS). The TFN membrane with 0.5 wt% fCNTs exhibited enhanced anti-biofouling properties of the bottom surface of the support layer compared to the bare TFC membrane due to the low roughness, high negative surface charge, and hydrophilicity. Compared to the bare TFC membrane, the support layer of the fCNT0.5-TFN membrane exhibited a 35% decrease in bacterial attachment. In a laboratory-scale biofouling test, the water flux of the fCNT0.5-TFN membrane was ∼10% less than that of the bare TFC membrane in the PRO mode. The anti-biofouling effect and characteristics of a thin film nanocomposite (TFN) membrane with a functionalized-carbon-nanotube-blended polymeric support layer for the pressure-retarded osmosis (PRO) process.![]()
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Affiliation(s)
- Yeji Kim
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) 123 Cheomdangwagi-ro, Buk-gu Gwangju 61005 South Korea .,Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 South Korea
| | - Eunmok Yang
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) 123 Cheomdangwagi-ro, Buk-gu Gwangju 61005 South Korea .,Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 South Korea
| | - Hosik Park
- Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 South Korea
| | - Heechul Choi
- School of Earth Science and Environmental Engineering, Gwangju Institute of Science and Technology (GIST) 123 Cheomdangwagi-ro, Buk-gu Gwangju 61005 South Korea .,Center for Membranes, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT) Daejeon 34114 South Korea
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30
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Khalaf DM, Elkatlawy SM, Sakr AA, Ebrahim SM. Enhanced oil/water separation via electrospun poly(acrylonitrile‐co‐vinyl acetate)/single‐wall carbon nanotubes fibrous nanocomposite membrane. J Appl Polym Sci 2020. [DOI: 10.1002/app.49033] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Doaa M. Khalaf
- Department of Materials Science, Institute of Graduate Studies and ResearchAlexandria University Alexandria Egypt
| | - Saeid M. Elkatlawy
- Department of Physics, Faculty of ScienceDamanhour University 22111 Damanhour Egypt
| | - Abdel‐Hamid A. Sakr
- Department of Physics, Faculty of ScienceDamanhour University 22111 Damanhour Egypt
| | - Shaker M. Ebrahim
- Department of Materials Science, Institute of Graduate Studies and ResearchAlexandria University Alexandria Egypt
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31
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Iqbal B, Jia X, Hu H, He L, Chen W, Song YF. Fabrication of redox-active polyoxometalate-based ionic crystals onto single-walled carbon nanotubes as high-performance anode materials for lithium-ion batteries. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01636h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Polyoxometalate-based ionic crystals were fabricated onto single-walled carbon nanotubes as anode materials for lithium-ion batteries with high specific capacity and excellent cycling stability.
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Affiliation(s)
- Bushra Iqbal
- State Key Laboratory of Chemical Resource Engineering
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Xueying Jia
- State Key Laboratory of Chemical Resource Engineering
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Hanbin Hu
- State Key Laboratory of Chemical Resource Engineering
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Lei He
- State Key Laboratory of Chemical Resource Engineering
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Wei Chen
- State Key Laboratory of Chemical Resource Engineering
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Yu-Fei Song
- State Key Laboratory of Chemical Resource Engineering
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- Beijing University of Chemical Technology
- Beijing
- P. R. China
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32
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Singh R, Chakravarty A, Mishra S, Prajapati RC, Dutta J, Bhat IK, Pandel U, Biswas SK, Muraleedharan K. AlN-SWCNT Metacomposites Having Tunable Negative Permittivity in Radio and Microwave Frequencies. ACS APPLIED MATERIALS & INTERFACES 2019; 11:48212-48220. [PMID: 31829543 DOI: 10.1021/acsami.9b15909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Discovery of plasmon resonance and negative permittivity in carbon allotropes at much lower frequencies than those of metals has evoked interest to develop random metacomposites by suitable means of addition of these dispersoids in an overall dielectric matrix. Random metacomposites have always the advantage for their easy preparation techniques over those of their regular arrayed artificial counterpart. However, thermal management during the heat generation by electromagnetic attenuation in metamaterials is not yet studied well. The present communication discusses the dielectric permittivities and loss parameters of aluminum nitride-single-wall carbon nanotube (AlN-SWCNT) composites considering high thermal conductivities of both materials. The composites are dense and have been prepared by a standard powder technological method using hot pressing at 1850 °C under a nitrogen atmosphere. Increase in the negative permittivity value with SWCNT concentration (1, 3, and 6 vol %) in the composites had been observed at low frequencies. Characterization of the materials with Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and microstructure analysis by scanning and transmission electron microscopy (TEM) revealed the survivability of the SWCNTs and the nature of the matrix-filler interface. Plasmonic resonance following Drude's law could be observed at much lower plasma frequencies than that of pure SWCNT and for very little SWCNT addition. Exhibition of the negative permittivity has been explained with relation to the microstructure of the composites observed from field emission scanning electron micrographs (FESEM), TEM images, and the equivalent circuit model. High energy conversion efficiency is expected in these composites due to the possession of dual functionalities like high thermal conductivity as well as high negative permittivity, which should ensure the application of these materials in wave filter, cloaking device, supercapacitors, and wireless communication.
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Affiliation(s)
- Ravindra Singh
- Malaviya National Institute of Technology , Jaipur 302017 , India
| | - Amrita Chakravarty
- CSIR-Central Glass & Ceramics Research Institute , Kolkata 700032 , India
| | - Shubhankar Mishra
- CSIR-Central Glass & Ceramics Research Institute , Kolkata 700032 , India
| | | | - Jit Dutta
- Malaviya National Institute of Technology , Jaipur 302017 , India
| | - Inder K Bhat
- Malaviya National Institute of Technology , Jaipur 302017 , India
| | - Upender Pandel
- Malaviya National Institute of Technology , Jaipur 302017 , India
| | - Sampad K Biswas
- Malaviya National Institute of Technology , Jaipur 302017 , India
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33
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Wu K, Wang J, Zhu Y, Wang X, Yang C, Liu Y, Liu C, Lu H, Liang B, Li Y. Supported β-Mo2C on Carbon Materials for Kraft Lignin Decomposition into Aromatic Monomers in Ethanol. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01807] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kejing Wu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Junbo Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Yingming Zhu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Xueting Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Chunyan Yang
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Yingying Liu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Changjun Liu
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Houfang Lu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Bin Liang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Yongdan Li
- Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Kemistintie 1, Espoo, P.O. Box 16100, FI-00076 Aalto, Finland
- Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, China
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34
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Corio P, Silva KC, Soares NA, Inoue F, Santos JJ. Probing the chemical interaction between different carbon allotropes oxides and titanium dioxide nanoparticles by Raman spectroscopy. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.03.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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35
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de los Reyes C, Smith McWilliams AD, Hernández K, Walz-Mitra KL, Ergülen S, Pasquali M, Martí AA. Adverse Effect of PTFE Stir Bars on the Covalent Functionalization of Carbon and Boron Nitride Nanotubes Using Billups-Birch Reduction Conditions. ACS OMEGA 2019; 4:5098-5106. [PMID: 31459687 PMCID: PMC6648908 DOI: 10.1021/acsomega.8b03677] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 02/21/2019] [Indexed: 06/10/2023]
Abstract
The functionalization of nanomaterials has long been studied as a way to manipulate and tailor their properties to a desired application. Of the various methods available, the Billups-Birch reduction has become an important and widely used reaction for the functionalization of carbon nanotubes (CNTs) and, more recently, boron nitride nanotubes. However, an easily overlooked source of error when using highly reductive conditions is the utilization of poly(tetrafluoroethylene) (PTFE) stir bars. In this work, we studied the effects of using this kind of stir bar versus using a glass stir bar by measuring the resulting degree of functionalization with 1-bromododecane. Thermogravimetric analysis studies alone could deceive one into thinking that reactions stirred with PTFE stir bars are highly functionalized; however, the utilization of spectroscopic techniques, such as Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, tells otherwise. Furthermore, in the case of CNTs, we determined that using Raman spectroscopy alone for analysis is not sufficient to demonstrate successful chemical modification.
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Affiliation(s)
- Carlos
A. de los Reyes
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
| | - Ashleigh D. Smith McWilliams
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
| | - Katharyn Hernández
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
| | - Kendahl L. Walz-Mitra
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
| | - Selin Ergülen
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
| | - Matteo Pasquali
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
| | - Angel A. Martí
- Department
of Chemistry, Department of Chemical and Biomolecular Engineering, Department of Materials
Science and NanoEngineering, Department of Bioengineering,
and Smalley-Curl Institute
for Nanoscale Science and Technology, Rice
University, Houston, Texas 77005, United States
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36
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Metal nanoparticle–carbon nanotubes hybrid catalysts immobilized in a polymeric membrane for the reduction of 4-nitrophenol. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0357-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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37
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Investigation on acid functionalization of double-walled carbon nanotubes of different lengths on the development of amperometric sensors. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.01.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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38
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Debus B, Takahama S, Weakley AT, Seibert K, Dillner AM. Long-Term Strategy for Assessing Carbonaceous Particulate Matter Concentrations from Multiple Fourier Transform Infrared (FT-IR) Instruments: Influence of Spectral Dissimilarities on Multivariate Calibration Performance. APPLIED SPECTROSCOPY 2019; 73:271-283. [PMID: 30223670 DOI: 10.1177/0003702818804574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Matching the spectral response between multiple spectrometers is a mandatory procedure when developing robust calibrations whose prediction is independent of instrument-related signal variations. A viable alternative to complex calibration transfer methods consists of matching the instrument spectral response by controlling a set of key instrumental and environmental parameters. This paper discusses the applicability of such an approach to three Fourier transform infrared (FT-IR) spectrometers used for the routine assessment of carbonaceous particulate matter concentrations in the Interagency Monitoring of PROtected Visual Environments (IMPROVE) speciation network. The effectiveness of the proposed matching procedure is evaluated by comparing the spectral response for each individual instrument in order to characterize the extent, and nature, of the remaining inter-instrument spectral dissimilarities. Instrument-related contributions to the signal were determined to be small compared with the spectral variability induced by the filter type used for sample collection. The impact of spectral differences on prediction was addressed through the comparison of model performance derived from multiple calibration scenarios. A hybrid model yielding accurate and homogeneous prediction regardless of the instrument was proposed for organic carbon (OC) and elemental carbon (EC), two major constituents of atmospheric particulate matter. Coefficients of determination of 0.98 (OC) and 0.90 (EC) with median biases not exceeding 0.20 µg (OC) and 0.07 µg (EC) are reported. The long-term stability, assessed from weekly measurements of reference samples, shows a deviation in predicted concentrations of less than ±5% over a 2.5-year period for most of the data collected. Extending OC and EC hybrid models to the prediction of ambient samples collected during the two subsequent years provides satisfactory performance. The proposed instrument matching procedure coupled with the relative simplicity of the hybrid model is an alternative to computationally advanced calibration transfer methodologies for the characterization of carbonaceous particulate matter using multiple FT-IR instruments.
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Affiliation(s)
- Bruno Debus
- 1 Air Quality Research Center, University of California Davis, Davis, CA, USA
| | - Satoshi Takahama
- 2 ENAC/IIE, Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
| | - Andrew T Weakley
- 1 Air Quality Research Center, University of California Davis, Davis, CA, USA
| | - Kelsey Seibert
- 1 Air Quality Research Center, University of California Davis, Davis, CA, USA
| | - Ann M Dillner
- 1 Air Quality Research Center, University of California Davis, Davis, CA, USA
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39
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Alharthi S, El Rassi Z. CE with multi-walled carbon nanotubes (MWCNTs). Part I. Functionalized and SDS coated MWCNTs as pseudo-stationary phases in nanoparticle EKC - Studies on retention energetics. Talanta 2019; 192:534-544. [PMID: 30348427 DOI: 10.1016/j.talanta.2018.09.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/04/2018] [Accepted: 09/13/2018] [Indexed: 12/19/2022]
Abstract
In this study, multi-walled carbon nanotubes (MWCNTs) in either unmodified, hydroxylated (MWCNT-OH), carboxylated (MWCNT-COOH) or sulfonated (MWCNT-SO3H) forms were incorporated into the running electrolytes in capillary electrophoresis (CE) to play the role of pseudo-stationary phases (PSPs) and perform nanoparticle electrokinetic capillary chromatography (NPEKC). MWCNT-COOH and MWCNT-SO3H were derived from MWCNTs via their treatment with concentrated strong acids. These functionalized MWCNTs were characterized by Raman and FTIR spectroscopies to demonstrate their covalent functionalization. The study of MWCNT-SO3H and MWCNT-OH as PSPs were introduced in this research report for the first time in NPEKC. The results obtained with functionalized MWCNTs were compared to those obtained using unmodified MWCNTs for better understanding the electrophoretic behavior of these functionalized MWCNTs. While only MWCNT-COOH allowed the separation of some nucleic acid bases and nucleosides, neutral solutes such as alkylbenzenes (ABs), phenyl alkyl alcohols (PAAs) and aniline derivatives in neutral forms (i.e., at basic pH) were not resolved in the presence of neither MWCNT-COOH nor MWCNT-SO3H in the running electrolytes, indicating that these functionalized MWCNTs do not have enough surface charge density to function as effective PSPs in NPEKC. This necessitated the coating of the functionalized MWCNTs under investigation with sodium dodecyl sulfate (SDS) to bring about the separation of neutral solutes by NPEKC. The SDS coated MWCNTs whether unmodified or functionalized were characterized with two homologous series namely ABs and PAAs in order to evaluate their relative retention energetics under the same electrolyte composition. The results showed that the systems pairs SDS-MWCNT-COOH/SDS-MWCNTs and SDS-MWCNT-OH/SDS-MWCNTs were homoenergetics (i.e., same energetics) while the system pair SDS-MWCNT-SO3H/SDS-MWCNTs was homeoenergetics (i.e., similar energetics). On the other hand, all the systems pairs SDS coated MWCNTs/SDS were homeoenergetics. Homoenergetics means that the solute retention has an identical physico-chemical basis and the differences observed in the magnitude of solute retention on the various PSPs are attributed to differences in the nonpolar phase ratios of the PSPs under otherwise the same electrolyte composition. Conversely, homeoenergetics signifies that the solute retention has a similar physico-chemical basis in the PSPs systems under investigation, which also differ in their phase ratios.
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Affiliation(s)
- Sarah Alharthi
- Department of Chemistry, Oklahoma State University, Stillwater, OK 74078-3071, United States
| | - Ziad El Rassi
- Department of Chemistry, Oklahoma State University, Stillwater, OK 74078-3071, United States.
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40
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Yamagami M, Tajima T, Ishimoto K, Miyake H, Michiue H, Takaguchi Y. Physical modification of carbon nanotubes with a dendrimer bearing terminal mercaptoundecahydrododecaborates (Na
2
B
12
H
11
S). HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Masahiro Yamagami
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
| | - Tomoyuki Tajima
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
| | - Kango Ishimoto
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
| | - Hideaki Miyake
- Graduate School of Sciences and Technology for InnovationYamaguchi University Yamaguchi Japan
| | | | - Yutaka Takaguchi
- Graduate School of Environmental and Life ScienceOkayama University Okayama Japan
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41
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Zhang X, Shen L, Guan CY, Liu CX, Lang WZ, Wang Y. Construction of SiO2@MWNTs incorporated PVDF substrate for reducing internal concentration polarization in forward osmosis. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.07.043] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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42
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González-Lavado E, Iturrioz-Rodríguez N, Padín-González E, González J, García-Hevia L, Heuts J, Pesquera C, González F, Villegas JC, Valiente R, Fanarraga ML. Biodegradable multi-walled carbon nanotubes trigger anti-tumoral effects. NANOSCALE 2018; 10:11013-11020. [PMID: 29868677 DOI: 10.1039/c8nr03036g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbon nanotubes are of huge biotechnological interest because they can penetrate most biological barriers and, inside cells, can biomimetically interact with the cytoskeletal filaments, triggering anti-proliferative and cytotoxic effects in highly dividing cells. Unfortunately, their intrinsic properties and bio-persistence represent a putative hazard that relapses their application as therapies against cancer. Here we investigate mild oxidation treatments to improve the intracellular enzymatic digestion of MWCNTs, but preserving their morphology, responsible for their intrinsic cytotoxic properties. Cell imaging techniques and confocal Raman spectroscopic signature analysis revealed that cultured macrophages can degrade bundles of oxidized MWCNTs (o-MWCNTs) in a few days. The isolation of nanotubes from these phagocytes 96 hours after exposure confirmed a significant reduction of approximately 30% in the total length of these filaments compared to the control o-MWCNTs extracted from the cell culture medium, or the intracellular pristine MWCNTs. More interestingly, in vivo single intratumoral injections of o-MWCNTs triggered ca. 30% solid melanoma tumour growth-inhibitory effects while displaying significant signs of biodegradation at the tumoral/peri-tumoral tissues a week after the therapy has had the effect. These results support the potential use of o-MWCNTs as antitumoral agents and reveal interesting clues of how to enhance the efficient clearance of in vivo carbon nanotubes.
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Affiliation(s)
- E González-Lavado
- Grupo de Nanomedicina Universidad de Cantabria-IDIVAL, Herrera Oria s/n, 39011, Santander, Spain
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43
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Wang D, Meng L, Fei Z, Hou C, Long J, Zeng L, Dyson PJ, Huang P. Multi-layered tumor-targeting photothermal-doxorubicin releasing nanotubes eradicate tumors in vivo with negligible systemic toxicity. NANOSCALE 2018; 10:8536-8546. [PMID: 29694478 DOI: 10.1039/c8nr00663f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Multi-layered single-walled carbon nanotubes, termed SWNT@BSA@Au-S-PEG-FA@DOX, which integrate photothermal therapy with small molecule drug delivery, were prepared using a facile layer-by-layer assembly process. Oxidized and cut single-walled carbon nanotubes (SWNTs) were coated with bovine serum albumin (BSA) to provide abundant active sites for the nucleation of Au seeds, which are subsequently converted into gold nanoparticles (Au NPs) by in situ reduction. The resulting SWNT@BSA@Au material exhibits ideal photothermal properties. Further modification of the nanomaterial with folic acid terminated-polyglycol (FA-PEG-SH) and subsequent loading with doxorubicin (DOX) afford the SWNT@BSA@Au-S-PEG-FA@DOX. The FA terminated PEG endows the material with high water-dispersibility, biocompatibility and cancer cell selectivity. A high drug loading ratio for DOX of up to 590% was achieved, with the drug release being pH and temperature dependent, adding to the selectivity of the system. High efficacy of the SWNT@BSA@Au-S-PEG-FA@DOX material, when combined with photothermal therapy (irradiation of the tumor with an 808 nm laser, 1 W cm-2 for 5 min, 24 h after systemic injection of the nanomedicine), was demonstrated in vivo, resulting in complete tumor eradication. Remarkably, the side effects are negligible with only minor damage to normal tissues including the liver and kidneys being observed.
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Affiliation(s)
- Daquan Wang
- School of Science, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Instrumental Analysis Center, Xi'an Jiaotong University, Xi'an 710049, China.
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44
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One-step synthesis highly sensitive non-enzyme hydrogen peroxide sensor based on prussian blue/polyaniline/MWCNTs nanocomposites. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1386-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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45
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Effect of Carbon Black Nanoparticles from the Pyrolysis of Discarded Tires on the Performance of Asphalt and its Mixtures. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8040624] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Francis E, Zhai L, Chan Kim H, Ramachandran R, Amarendra G, Balerao G, Kalarikkal N, Varughese K, Kim J, Thomas S. Morphology correlated free volume studies of multi-walled carbon nanotube plasticized poly (vinyl chloride) nanocomposites: Positronium probes and electrical properties. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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48
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Pu J, Wang X, Xu R, Xu S, Komvopoulos K. Highly flexible, foldable, and rollable microsupercapacitors on an ultrathin polyimide substrate with high power density. MICROSYSTEMS & NANOENGINEERING 2018; 4:16. [PMID: 31057904 PMCID: PMC6220169 DOI: 10.1038/s41378-018-0016-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 03/23/2018] [Accepted: 03/28/2018] [Indexed: 05/22/2023]
Abstract
The design and functionality of extremely flexible, foldable, and rollable microsupercapacitors (MSCs) with in-plane interdigital electrodes that consist of single-walled carbon nanotube (SWCNT) networks on an ultrathin polyimide substrate are demonstrated through experiments and finite element simulations. The all-solid-state MSCs can be reversibly bent, folded, and rolled purely elastically without degradation of their electrical performance. The simulation results confirm that the deformation in bent, folded, and rolled MSCs is purely elastic. The high power density (1125 W cm-3) and small time constant (1 ms) of the present MSCs are comparable to those of aluminum electrolytic capacitors. The MSCs operate at scan rates of up to 1000 V s-1, are characterized by a volumetric capacitance of 18 F cm-3 and an energy density of 1.6 mWh cm-3, and exhibit superior electrochemical stability with 96% capacity retention even after 100,000 charge/discharge cycles. The developed MSCs demonstrate high potential for integration in flexible and wearable electronic systems.
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Affiliation(s)
- Juan Pu
- Department of Microelectronics and Nanoelectronics, Tsinghua University, Beijing, 100084 China
- Institute of Microelectronics, Tsinghua University, Beijing, 100084 China
- Tsinghua National Laboratory for Information Science and Technology, Beijing, 100084 China
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
| | - Xiaohong Wang
- Department of Microelectronics and Nanoelectronics, Tsinghua University, Beijing, 100084 China
- Institute of Microelectronics, Tsinghua University, Beijing, 100084 China
- Tsinghua National Laboratory for Information Science and Technology, Beijing, 100084 China
| | - Renxiao Xu
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
| | - Sixing Xu
- Department of Microelectronics and Nanoelectronics, Tsinghua University, Beijing, 100084 China
- Institute of Microelectronics, Tsinghua University, Beijing, 100084 China
- Tsinghua National Laboratory for Information Science and Technology, Beijing, 100084 China
| | - Kyriakos Komvopoulos
- Department of Mechanical Engineering, University of California, Berkeley, CA 94720 USA
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49
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Tang J, Wang J. Fe3
O4
-MWCNT Magnetic Nanocomposites as Efficient Fenton-Like Catalysts for Degradation of Sulfamethazine in Aqueous Solution. ChemistrySelect 2017. [DOI: 10.1002/slct.201702249] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Juntao Tang
- Collaborative Innovation Center for Advanced Nuclear Energy Science Building, INEB; Tsinghua University; Beijing 100084 P.R. China
| | - Jianlong Wang
- Collaborative Innovation Center for Advanced Nuclear Energy Science Building, INEB; Tsinghua University; Beijing 100084 P.R. China
- Beijing Key Laboratory of Radioactive Waste Treatment, INET; Tsinghua University; Beijing 100084 P.R. China
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50
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Jain SM, Cesano F, Scarano D, Edvinsson T. Resonance Raman and IR spectroscopy of aligned carbon nanotube arrays with extremely narrow diameters prepared with molecular catalysts on steel substrates. Phys Chem Chem Phys 2017; 19:30667-30674. [PMID: 29119158 DOI: 10.1039/c7cp06973a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Carbon nanotubes (CNTs) are considered promising for a large range of emerging technologies ranging from advanced electronics to utilization as nanoreactors. Here we report a controlled facile synthesis of aligned carbon nanotubes with very small dimensions directly grown on steel grid substrates via two-step catalytic chemical vapor deposition (CCVD) of a molecular catalyst (ferrocene) with ethylene as the carbon source. The system is characterized by resonance Raman spectroscopy and the results show single walled carbon nanotube (SWCNT) arrays composed of 0.80 nm to 1.24 nm semiconducting CNTs, as analyzed using Kataura analysis, which is approaching the lowest diameters attainable for SWCNTs. The G+ and G- mode splitting, G- line shapes and ring breathing modes (RBMs) are analyzed to characterize the CNTs. The approach results in close packed and vertically aligned SWCNT bundles formed into hair shapes, with some contribution from multiwall CNTs (MWCNTs). IR spectroscopy is utilized to characterize the edge/defect states that have the ability to form esters and ether bonds in the as-prepared CNTs. The stepwise deposition of the catalyst followed by the carbon source gives control over the formation of small diameter single walled carbon nanotubes (SWCNTs). The utilization of molecular catalysts for narrow diameter growth directly on steel grid substrates forms a promising approach for producing cost-effective CNT substrates for a plethora of sensing and catalytic applications.
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Affiliation(s)
- Sagar Motilal Jain
- SPECIFIC, College of Engineering Swansea University Bay Campus, Fabian Way, SA1 8EN Swansea, UK
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