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Abotaleb A, Al-Masri D, Alkhateb A, Mroue K, Zekri A, Mashhour Y, Sinopoli A. Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane. RSC Adv 2024; 14:4788-4803. [PMID: 38318606 PMCID: PMC10840390 DOI: 10.1039/d3ra07990b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 01/19/2024] [Indexed: 02/07/2024] Open
Abstract
Dry reforming of methane (DRM) has recently received wide attention owing to its outstanding performance in the reduction and conversion of CH4 and CO2 to syngas (H2 and CO). From an industrial perspective, nickel (Ni)-supported catalysts have been deemed among the most suitable catalysts for DRM owing to their low cost and high activity compared to noble metals. However, a downside of nickel catalysts is their high susceptibility to deactivation due to coke formation and sintering at high temperatures. Using appropriate supports and preparation methods plays a major role in improving the activity and stability of Ni-supported catalysts. Halloysite nanotubes (HNTs) are largely utilized in catalysis as a support for Ni owing to their abundance, low cost, and ease of preparation. The treatment of HNTs (chemical or physical) prior to doping with Ni is considered a suitable method for increasing the overall performance of the catalyst. In this study, the surface of HNTs was activated with acids (HNO3 and H2SO4) and alkalis (NaOH and Na2CO3 + NaNO3) prior to Ni doping to assess the effects of support treatment on the stability, activity, and longevity of the catalyst. Nickel catalysts on raw HNT, acid-treated HNT, and alkali-treated HNT supports were prepared via wet impregnation. A detailed characterization of the catalysts was conducted using X-ray diffraction (XRD), BET surface area analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), solid-state nuclear magnetic resonance (ssNMR), H2-temperature programmed reduction, (H2-TPR), CO2-temperature programmed desorption (CO2-TPD), and Ni-dispersion via H2-pulse chemisorption. Our results reveal a clear alteration in the structure of HNTs after treatment, while elemental mapping shows a uniform distribution of Ni throughout all the different supports. Moreover, the supports treated with a molten salt method resulted in the overall highest CO2 and CH4 conversion among the studied catalysts and exhibited high stability over 24 hours testing.
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Affiliation(s)
- Ahmed Abotaleb
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Dema Al-Masri
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
- Earthna Center for a Sustainable Future, Qatar Foundation Doha Qatar
| | - Alaa Alkhateb
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Kamal Mroue
- HBKU Core Labs, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Atef Zekri
- HBKU Core Labs, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
| | - Yasmin Mashhour
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University Doha P.O. Box 2713 Qatar
| | - Alessandro Sinopoli
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University P.O. Box 34110 Doha Qatar
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2
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Rouzière S, Balédent V, Paineau E, Elkaim E, Bizien T, Nataf L, Pan Y, Launois P. Compressibility and Structural Transformations of Aluminogermanate Imogolite Nanotubes under Hydrostatic Pressure. Inorg Chem 2023; 62:957-966. [PMID: 36595652 DOI: 10.1021/acs.inorgchem.2c03798] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We present in situ pressure experiments on aluminogermanate nanotubes studied by X-ray scattering and absorption spectroscopy measurements. Structural transformations under hydrostatic pressure below 10 GPa are investigated as a function of the morphology, organization, or functionalization of the nanotubes. Radial deformations, ovalization for isolated nanotubes, and hexagonalization when they are bundled are evidenced. Radial collapse of single-walled nanotubes is shown to occur, in contrast to the double-walled nanotubes. The effect of the transmitting pressure medium used on the collapse onset pressure value is demonstrated. Axial Young's moduli are determined for isolated (400 GPa) and bundled (600 GPa) single-walled nanotubes, double-walled nanotubes (440 GPa), and methylated single-walled nanotubes (200 GPa).
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Affiliation(s)
- S Rouzière
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405Orsay cedex, France
| | - V Balédent
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405Orsay cedex, France
| | - E Paineau
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405Orsay cedex, France
| | - E Elkaim
- Synchrotron SOLEIL, L'Orme des merisiers, Saint Aubin, BP 48, 91192Gif-sur-Yvette, France
| | - T Bizien
- Synchrotron SOLEIL, L'Orme des merisiers, Saint Aubin, BP 48, 91192Gif-sur-Yvette, France
| | - L Nataf
- Synchrotron SOLEIL, L'Orme des merisiers, Saint Aubin, BP 48, 91192Gif-sur-Yvette, France
| | - Y Pan
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405Orsay cedex, France
| | - P Launois
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405Orsay cedex, France
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Martinis EM, Denardin JC, Calderón R, Flores C, Manquián-Cerda K, Maldonado T, Arancibia-Miranda N. Enhanced removal of mercury and lead by a novel and efficient surface-functionalized imogolite with nanoscale zero-valent iron material. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:20221-20233. [PMID: 34725756 DOI: 10.1007/s11356-021-17242-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
A novel hybrid nanomaterial, nanoscale zero-valent iron (nZVI)-grafted imogolite nanotubes (Imo), was synthesized via a fast and straightforward chemical procedure. The as-obtained nanomaterial (Imo-nZVI) was characterized using transmission electron microscopy (TEM), electrophoretic mobility (EM), and vibrating sample magnetometry (VSM). The prepared Imo-nZVI was superparamagnetic at room temperature and could be easily separated by an external magnetic field. Sorption batch experiments were performed for single- and multicomponent systems and demonstrated that Hg2+ and Pb2+ could be quantitatively adsorbed at pH 3.0. For multicomponent systems, maximum adsorption capacities of 61.6 mg·g-1 and 76.9 mg·g-1 were obtained for Hg2+ and Pb2+ respectively. It was observed that the functional groups in Imo-nZVI interact preferentially with analytes according to the Misono softness parameter. The higher performance of Imo-nZVI compared with Imo and nZVI is related to the increased number of adsorption sites in the functionalized nanomaterial. The sorption equilibrium data obeyed the Langmuir model, while kinetic studies demonstrated that the sorption processes of Hg2+ and Pb2+ followed the pseudo-second-order model. This study suggests that the Imo-nZVI composite can be used as a promising sorbent to provide a simple and fast separation method to remove Hg and Pb ions from contaminated water.
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Affiliation(s)
- Estefanía M Martinis
- Facultad de Ingeniería, Universidad Nacional de Cuyo, Consejo Nacional de Investigaciones Científicas y Técnicas, UNCUYO-CONICET, Mendoza, Argentina.
| | - Juliano C Denardin
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago, Chile
| | - Raul Calderón
- Centro de Investigación en Recursos Naturales y Sustentabilidad, Universidad Bernardo O'Higgins, Fabrica, 1990, Segundo Piso, Santiago, Chile
- Instituto de Investigaciones Agropecuarias, INIA La Platina, Santa Rosa, 11610, Santiago, Chile
| | - Cristóbal Flores
- Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Karen Manquián-Cerda
- Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Tamara Maldonado
- Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Nicolás Arancibia-Miranda
- Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago, Chile.
- Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile.
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4
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Korde A, Min B, Kapaca E, Knio O, Nezam I, Wang Z, Leisen J, Yin X, Zhang X, Sholl DS, Zou X, Willhammar T, Jones CW, Nair S. Single-walled zeolitic nanotubes. Science 2022; 375:62-66. [PMID: 34990247 DOI: 10.1126/science.abg3793] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report the synthesis and structure of single-walled aluminosilicate nanotubes with microporous zeolitic walls. This quasi-one-dimensional zeolite is assembled by a bolaform structure-directing agent (SDA) containing a central biphenyl group connected by C10 alkyl chains to quinuclidinium end groups. High-resolution electron microscopy and diffraction, along with other supporting methods, revealed a unique wall structure that is a hybrid of characteristic building layers from two zeolite structure types, beta and MFI. This hybrid structure arises from minimization of strain energy during the formation of a curved nanotube wall. Nanotube formation involves the early appearance of a mesostructure due to self-assembly of the SDA molecules. The biphenyl core groups of the SDA molecules show evidence of π stacking, whereas the peripheral quinuclidinium groups direct the microporous wall structure.
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Affiliation(s)
- Akshay Korde
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Byunghyun Min
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Elina Kapaca
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Omar Knio
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Iman Nezam
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Ziyuan Wang
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Johannes Leisen
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Xinyang Yin
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Xueyi Zhang
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - David S Sholl
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Xiaodong Zou
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Tom Willhammar
- Department of Materials and Environmental Chemistry, Stockholm University, 10691 Stockholm, Sweden
| | - Christopher W Jones
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.,School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Sankar Nair
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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5
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Daivis PJ, Hansen JS, Todd BD. Electropumping of nanofluidic water by linear and angular momentum coupling: theoretical foundations and molecular dynamics simulations. Phys Chem Chem Phys 2021; 23:25003-25018. [PMID: 34739012 DOI: 10.1039/d1cp04139h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In this article we review the relatively new phenomenon of electropumping in nanofluidic systems, in which nonzero net flow results when polar molecules are rotated by external electric fields. The flow is a consequence of coupling of the spin angular momentum of molecules with their linear streaming momentum. By devising confining surfaces that are asymmetric - specifically one surface is more hydrophobic compared to the other - unidirectional flow results and so pumping can be achieved without the use of pressure gradients. We first cover the historical background to this phenomenon and follow that with a detailed theoretical description of the governing hydrodynamics. Following that we summarise work that has applied this phenomenon to pump water confined to planar nanochannels, semi-functionalised single carbon nanotubes and concentric carbon nanotubes. We also report on the energy efficiency of this pumping technique by comparisons with traditional flows of planar Couette and Poiseuille flow, with the surprising conclusion that electropumping at the nanoscale is some 4 orders of magnitude more efficient than pumping by Poiseuille flow.
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Affiliation(s)
- Peter J Daivis
- School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
| | - J S Hansen
- "Glass and Time", IMFUFA, Department of Science and Environment, Roskilde University, Roskilde 4000, Denmark.
| | - B D Todd
- Department of Mathematics, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria 3122, Australia.
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6
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Cavallaro G, Lazzara G, Pignon F, Chiappisi L, Paineau E. Effect of Polymer Length on the Adsorption onto Aluminogermanate Imogolite Nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9858-9864. [PMID: 34369144 DOI: 10.1021/acs.langmuir.1c01549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study evidences the adsorption of model nonionic polymers onto aluminogermanate imogolite nanotubes, attractive porous nanofillers with potential molecular loading and release applications. We resolve the underlying mechanisms between nanotubes and polyethylene glycols with different molecular weights by means of nanoisothermal titration calorimetry. The analysis of the results provides a direct thermodynamic characterization, allowing us to propose a detailed description of the energetics involved in the formation of polymer/imogolite complexes. The affinity toward the nanotube surface is enthalpy-driven and strongly depends on the polymer chain length, which significantly affects the polymer configuration and the flow properties of the resulting complexes, probed by small-angle neutron scattering and rheology, respectively. These findings open new avenues for the rational design of these hybrid mixtures for advanced applications.
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Affiliation(s)
- Giuseppe Cavallaro
- Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, pad. 17, Palermo 90128, Italy
| | - Giuseppe Lazzara
- Department of Physics and Chemistry, University of Palermo, Viale delle Scienze, pad. 17, Palermo 90128, Italy
| | - Frédéric Pignon
- Laboratoire de Rhéologie et Procédés, Univ. Grenoble Alpes, CNRS, Grenoble INP (Institut of Engineering Univ. Grenoble-Alpes), Grenoble F-38000, France
| | | | - Erwan Paineau
- Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay 91405, France
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7
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Termination Effects in Aluminosilicate and Aluminogermanate Imogolite Nanotubes: A Density Functional Theory Study. CRYSTALS 2020. [DOI: 10.3390/cryst10111051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We investigate termination effects in aluminosilicate (AlSi) and aluminogermanate (AlGe) imogolite nanotubes (NTs) by means of semi-local and range-corrected hybrid Density Functional Theory (DFT) simulations. Following screening and identification of the smallest finite model capable of accommodating full relaxation of the NT terminations around an otherwise geometrically and electrostatically unperturbed core region, we quantify and discuss the effects of physical truncation on the structure, relative energy, electrostatics and electronic properties of differently terminated, finite-size models of the NTs. In addition to composition-dependent changes in the valence (VB) and conduction band (CB) edges and resultant band gap (BG), the DFT simulations uncover longitudinal band bending and separation in the finite AlSi and AlGe models. Depending on the given termination of the NTs, such longitudinal effects manifest in conjunction with the radial band separation typical of fully periodic AlSi and AlGe NTs. The strong composition dependence of the longitudinal and radial band bending in AlSi and AlGe NTs suggests different mechanisms for the generation, relaxation and separation of photo-generated holes in AlSi and AlGe NTs, inviting further research in the untapped potential of imogolite compositional and structural flexibility for photo-catalytic applications.
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8
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Bakdash RS, Aljundi IH, Basheer C, Abdulazeez I. Rice husk derived Aminated Silica for the efficient adsorption of different gases. Sci Rep 2020; 10:19526. [PMID: 33177644 PMCID: PMC7658350 DOI: 10.1038/s41598-020-76460-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 10/27/2020] [Indexed: 01/17/2023] Open
Abstract
In this present work, we successfully prepared aminated silica (ASiO2) from rice husk ash (RHA) and functionalized with 3-aminopropyltriethoxysilane (APTES). Physical and chemical properties of the synthesized material were investigated by various techniques SEM-EDX, XPS, FTIR, TGA. The surface area of RHA was 223 m2/g, while for ASiO2 was 101 m2/g. Molecular level DFT calculations revealed that the functionalization of ASiO2 resulted in a significant decrease in the HOMO-LUMO energy gap, a reduction in hardness, and a consequent increase in charge transfer characteristics. The adsorption behavior at low pressure (1 atm.) of aminated silica on different gases CO2, CH4, H2, and N2 at temperatures 77, 273, 298 K was studied. The adsorption of hydrogen was reported for the first time on aminated silica with an excellent adsorption capacity of 1.2 mmol/g. The ASiO2 exhibited excellent performance in terms of gas separation in binary mixtures of CO2/CH4, CO2/N2 and CO2/H2 at 273, and 298 K, respectively. The catalyst further exhibits high stability during three cycles with less than 10% variation in the separation capacity.
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Affiliation(s)
- Rashed S Bakdash
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Isam H Aljundi
- Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia.
| | - Chanbasha Basheer
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia.
| | - Ismail Abdulazeez
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
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9
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Ning S, Xu H, Qi Y, Song L, Zhang Q, Ouyang S, Ye J. Microstructure Induced Thermodynamic and Kinetic Modulation to Enhance CO2 Photothermal Reduction: A Case of Atomic-Scale Dispersed Co–N Species Anchored Co@C Hybrid. ACS Catal 2020. [DOI: 10.1021/acscatal.9b04963] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shangbo Ning
- TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, P. R. China
| | - Hua Xu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430205, P. R. China
| | - Yuhang Qi
- TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, P. R. China
| | - Lizhu Song
- TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, P. R. China
| | - Qiqi Zhang
- TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, P. R. China
| | - Shuxin Ouyang
- TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, P. R. China
- College of Chemistry, Central China Normal University, No. 152, Luoyu Road, Wuhan 430079, P. R. China
| | - Jinhua Ye
- TJU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, P. R. China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0047, Japan
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10
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Saddiqi NUH, Seeger S. Droplet assisted growth and shaping of alumina and mixed alumina-silicone 1-dimensional nanostructures. J Colloid Interface Sci 2020; 560:77-84. [PMID: 31648085 DOI: 10.1016/j.jcis.2019.09.122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 10/25/2022]
Abstract
Since the discovery of silicone nanofilaments a decade ago, room temperature droplet assisted growth and shaping using silanes has been used to synthesize various silicone-based nanostructures. In the present work, we report an extension of this synthesis technique to synthesize nanostructures of new materials. We have successfully synthesized one-dimensional assemblies of beads or necklaces based on alumina (Al) and mixed alumina-silicone (AlSi) nanostructures exhibiting a similar structure as silicone nanofilaments. The characterization of the synthesized nanostructures was performed using different tools, including scanning and transmission electron microscopy, energy dispersive x-ray spectroscopy, and infrared and NMR spectroscopy. Selected area electron diffraction revealed that the nanostructures are amorphous in nature, and the growth behavior and thermal stability of nanostructures are also discussed.
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Affiliation(s)
- Naeem-Ul-Hasan Saddiqi
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057 Zurich, Switzerland
| | - Stefan Seeger
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057 Zurich, Switzerland.
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11
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Ostler D, Kannam SK, Frascoli F, Daivis PJ, D Todd B. Inducing a Net Positive Flow of Water in Functionalized Concentric Carbon Nanotubes Using Rotating Electric Fields. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14742-14749. [PMID: 31614091 DOI: 10.1021/acs.langmuir.9b02594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Electropumping has shown great potential as an effective means of inducing a net positive flow of water in confined channels. In this paper we present the first nonequilibrium molecular dynamics study and continuum based numerical solutions that demonstrate an effective net positive flow between concentric carbon nanotubes (CNT) using electropumping. We apply a spatially uniform rotating electric field that couples to the water's permanent dipole moment. Taking advantage of the coupling between the spin angular momentum and the linear momentum we break the symmetry of the channel radius by functionalizing the inner CNT's outer surface with carboxyl groups to induce a net positive flow. We also show that our results for concentric nanotubes are consistent with our previous work where we demonstrated that an increase in functionalization beyond an optimal point in a single walled carbon nanotube resulted in a decrease in positive net flow. We then numerically solve the coupled hydrodynamic momentum equations to show that the nonequilibrium molecular dynamics results are consistent with the continuum theory.
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Affiliation(s)
- David Ostler
- Department of Mathematics, School of Science, Faculty of Science, Engineering and Technology , Swinburne University of Technology , Melbourne , Victoria 3122 , Australia
| | - Sridhar Kumar Kannam
- Department of Mathematics, School of Science, Faculty of Science, Engineering and Technology , Swinburne University of Technology , Melbourne , Victoria 3122 , Australia
| | - Federico Frascoli
- Department of Mathematics, School of Science, Faculty of Science, Engineering and Technology , Swinburne University of Technology , Melbourne , Victoria 3122 , Australia
| | - Peter J Daivis
- School of Science and Centre for Molecular and Nanoscale Physics , RMIT University , Melbourne , Victoria 3001 , Australia
| | - B D Todd
- Department of Mathematics, School of Science, Faculty of Science, Engineering and Technology , Swinburne University of Technology , Melbourne , Victoria 3122 , Australia
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12
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Cho EH, Lyu Q, Lin LC. Computational discovery of nanoporous materials for energy- and environment-related applications. MOLECULAR SIMULATION 2019. [DOI: 10.1080/08927022.2019.1626990] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Eun Hyun Cho
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
| | - Qiang Lyu
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
- School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, Shandong, China
| | - Li-Chiang Lin
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
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13
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Shi SJ, Pan YH, Wang SF, Dai ZW, Gu L, Wu QY. Aluminosilicate Nanotubes Embedded Polyamide Thin Film Nanocomposite Forward Osmosis Membranes with Simultaneous Enhancement of Water Permeability and Selectivity. Polymers (Basel) 2019; 11:E879. [PMID: 31091763 PMCID: PMC6572521 DOI: 10.3390/polym11050879] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/05/2019] [Accepted: 05/08/2019] [Indexed: 11/16/2022] Open
Abstract
Nanocomposite membranes are strongly desired to break a trade-off between permeability and selectivity. This work reports new thin film nanocomposite (TFN) forward osmosis (FO) membranes by embedding aluminosilicate nanotubes (ANTs) into a polyamide (PA) rejection layer. The surface morphology and structure of the TFN FO membranes were carefully characterized by FTIR, XPS, FESEM and AFM. The ANTs incorporated PA rejection layers exhibited many open and broad "leaf-like" folds with "ridge-and-valley" structures, high surface roughness and relatively low cross-linking degree. Compared with thin film composite (TFC) membrane without ANTs, the TFN membrane with only 0.2 w/v% ANTs loading presented significantly improved FO water permeability, selectivity and reduced structural parameters. This promising performance can be mainly contributed to the special ANTs embedded PA rejection layer, where water molecules preferentially transport through the nanochannels of ANTs. Molecular dynamic simulation further proved that water molecules have much larger flux through the nanotubes of ANTs than sodium and chloride ions, which are attributed to the intrinsic hydrophilicity of ANTs and low external force for water transport. This work shows that these TFN FO membranes with ANTs decorated PA layer are promising in desalination applications due to their simultaneously enhanced permeability and selectivity.
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Affiliation(s)
- She-Ji Shi
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| | - Ye-Han Pan
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| | - Shao-Fei Wang
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
| | - Zheng-Wei Dai
- College of Material and Textile Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Lin Gu
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences; Ningbo 315201; China.
| | - Qing-Yun Wu
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
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Poli E, Elliott JD, Chulkov SK, Watkins MB, Teobaldi G. The Role of Cation-Vacancies for the Electronic and Optical Properties of Aluminosilicate Imogolite Nanotubes: A Non-local, Linear-Response TDDFT Study. Front Chem 2019; 7:210. [PMID: 31024896 PMCID: PMC6469436 DOI: 10.3389/fchem.2019.00210] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/18/2019] [Indexed: 11/13/2022] Open
Abstract
We report a combined non-local (PBE-TC-LRC) Density Functional Theory (DFT) and linear-response time-dependent DFT (LR-TDDFT) study of the structural, electronic, and optical properties of the cation-vacancy based defects in aluminosilicate (AlSi) imogolite nanotubes (Imo-NTs) that have been recently proposed on the basis of Nuclear Magnetic Resonance (NMR) experiments. Following numerical determination of the smallest AlSi Imo-NT model capable of accommodating the defect-induced relaxation with negligible finite-size errors, we analyse the defect-induced structural deformations in the NTs and ensuing changes in the NTs' electronic structure. The NMR-derived defects are found to introduce both shallow and deep occupied states in the pristine NTs' band gap (BG). These BG states are found to be highly localized at the defect site. No empty defect-state is modeled for any of the considered systems. LR-TDDFT simulation of the defects reveal increased low-energy optical absorbance for all but one defects, with the appearance of optically active excitations at energies lower than for the defect-free NT. These results enable interpretation of the low-energy tail in the experimental UV-vis spectra for AlSi NTs as being due to the defects. Finally, the PBE-TC-LRC-approximated exciton binding energy for the defects' optical transitions is found to be substantially lower (up to 0.8 eV) than for the pristine defect-free NT's excitations (1.1 eV).
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Affiliation(s)
- Emiliano Poli
- The Abdus Salam Center for Theoretical Physics, Condensed Matter and Statistical Physics Department, Trieste, Italy
| | - Joshua D. Elliott
- Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università degli Studi di Padova, Padova, Italy
- CNR-IOM DEMOCRITOS, Consiglio Nazionale delle Ricerche-Istituto Officina dei Materiali, Trieste, Italy
- School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, United Kingdom
| | - Sergey K. Chulkov
- School of Mathematics and Physics, University of Lincoln, Brayford Pool, Lincoln, United Kingdom
| | - Matthew B. Watkins
- School of Mathematics and Physics, University of Lincoln, Brayford Pool, Lincoln, United Kingdom
| | - Gilberto Teobaldi
- Daresbury Laboratory, Scientific Computing Department, Science and Technology Facilities Council, Warrington, United Kingdom
- Beijing Computational Science Research Centre, Beijing, China
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool, United Kingdom
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15
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Olson N, Deshpande N, Gunduz S, Ozkan US, Brunelli NA. Utilizing imogolite nanotubes as a tunable catalytic material for the selective isomerization of glucose to fructose. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.07.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Picot P, Liao Y, Barruet E, Gobeaux F, Coradin T, Thill A. Exploring Hybrid Imogolite Nanotube Formation via Si/Al Stoichiometry Control. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13225-13234. [PMID: 30296100 DOI: 10.1021/acs.langmuir.8b01075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Hybrid imogolite aluminosilicate nanotubes with methylated internal surface can be obtained by introduction of the corresponding organosilane during their synthesis. However, similarly to pristine imogolite, a number of side products, including proto-imogolite (open-imoLS), allophanes, and aluminum hydroxides, are formed, which ultimately impact on the properties of the dispersions. In order to minimize the proportion of these side products, we have here systematically explored the impact of the initial Si/Al ratio on the content of hybrid imogolite dispersions before and after dialysis. By combining cryo-transmission electron microscopy, inductively coupled plasma mass spectrometry, infrared spectroscopy, and small-angle X-ray scattering, we evidenced that the Si/Al ratio has a large impact on the formation of aluminum hydroxides that can be minimized with a slight excess of Si precursor. However, a large excess of Si is detrimental to the reaction yield leading to an important proportion of proto-imogolite. We propose that the optimal Si/Al ratio of ca. 0.6 can both minimize the proportion of aluminum hydroxides and proto-imogolite. These results suggest that the dynamic and therefore reactive character of imogolite dispersions may have been so far underlooked.
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Affiliation(s)
- Pierre Picot
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA-Saclay , 91191 Gif-sur-Yvette , France
| | - Yuanyuan Liao
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA-Saclay , 91191 Gif-sur-Yvette , France
| | - Elodie Barruet
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA-Saclay , 91191 Gif-sur-Yvette , France
| | - Frédéric Gobeaux
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA-Saclay , 91191 Gif-sur-Yvette , France
| | - Thibaud Coradin
- Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP) , 4 place Jussieu , 75005 Paris , France
| | - Antoine Thill
- LIONS, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA-Saclay , 91191 Gif-sur-Yvette , France
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17
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Imogolite Nanotubes: A Flexible Nanoplatform with Multipurpose Applications. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8101921] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Among a wide variety of inorganic nanotubes, imogolite nanotubes (INTs) represent a model of nanoplatforms with an untapped potential for advanced technological applications. Easily synthesized by sol-gel methods, these nanotubes are directly obtained with a monodisperse pore size. Coupled with the possibility to adjust their surface properties by using straightforward functionalization processes, INTs form a unique class of diameter-controlled nanotubes with functional interfaces. The purpose of this review is to provide the reader with an overview of the synthesis and functionalization of INTs. The properties of INTs will be stated afterwards into perspective with the recent development on their applications, in particular for polymer/INTs nanocomposites, molecular confinement or catalysis.
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18
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Microwave, Ultrasound, and Mechanochemistry: Unconventional Tools that Are Used to Obtain “Smart” Catalysts for CO2 Hydrogenation. Catalysts 2018. [DOI: 10.3390/catal8070262] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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19
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Lu M, Fang J, Han L, Faungnawakij K, Li H, Cai S, Shi L, Jiang H, Zhang D. Coke-resistant defect-confined Ni-based nanosheet-like catalysts derived from halloysites for CO 2 reforming of methane. NANOSCALE 2018; 10:10528-10537. [PMID: 29799596 DOI: 10.1039/c8nr02006j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, halloysites, one of the most abundant clays, with hollow nanotube features were reconstructed by selectively etching silica from the outermost layer of the halloysites associated with unzipping the nanotubes to nanosheets via ball milling, and then, nickel nanoparticles were confined by the resulting defects in the nanosheets to boost charge transfer by a wet impregnation method. The obtained materials were developed as coke-resistant defect-confined Ni-based nanosheet-like catalysts for CO2 reforming of methane (CRM) for the first time. The as-prepared catalyst exhibited good coke and sintering resistance performance in CRM, and especially, there was almost no loss of activity even after a 20 h stability test due to the strong interaction between the Ni nanoparticles and the support. The present investigations may provide a new pathway for the design and application of highly coke-resistant CRM catalysts.
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Affiliation(s)
- Meirong Lu
- Department of Chemistry, Research Center of Nano Science and Technology, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
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20
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Monet G, Amara MS, Rouzière S, Paineau E, Chai Z, Elliott JD, Poli E, Liu LM, Teobaldi G, Launois P. Structural resolution of inorganic nanotubes with complex stoichiometry. Nat Commun 2018; 9:2033. [PMID: 29789570 PMCID: PMC5964105 DOI: 10.1038/s41467-018-04360-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/24/2018] [Indexed: 11/19/2022] Open
Abstract
Determination of the atomic structure of inorganic single-walled nanotubes with complex stoichiometry remains elusive due to the too many atomic coordinates to be fitted with respect to X-ray diffractograms inherently exhibiting rather broad features. Here we introduce a methodology to reduce the number of fitted variables and enable resolution of the atomic structure for inorganic nanotubes with complex stoichiometry. We apply it to recently synthesized methylated aluminosilicate and aluminogermanate imogolite nanotubes of nominal composition (OH)3Al2O3Si(Ge)CH3. Fitting of X-ray scattering diagrams, supported by Density Functional Theory simulations, reveals an unexpected rolling mode for these systems. The transferability of the approach opens up for improved understanding of structure–property relationships of inorganic nanotubes to the benefit of fundamental and applicative research in these systems. Structural determination of inorganic nanotubes has lagged far behind that of their carbon-based counterparts. Here, the authors present a transferable methodology, combining wide angle X-ray scattering and computation, to quantitatively resolve the atomic structure of inorganic nanotubes with complex stoichiometry.
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Affiliation(s)
- Geoffrey Monet
- Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, 91405, Orsay Cedex, France
| | - Mohamed S Amara
- Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, 91405, Orsay Cedex, France
| | - Stéphan Rouzière
- Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, 91405, Orsay Cedex, France
| | - Erwan Paineau
- Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, 91405, Orsay Cedex, France
| | - Ziwei Chai
- Beijing Computational Science Research Centre, 100193, Beijing, China
| | - Joshua D Elliott
- Stephenson Institute for Renewable Energy and Department of Chemistry, The University of Liverpool, Liverpool, L69 3BX, UK.,Dipartimento di Fisica e Astronomia "Galileo Galilei", Università degli Studi di Padova, I-35131, Padova, Italy
| | - Emiliano Poli
- Stephenson Institute for Renewable Energy and Department of Chemistry, The University of Liverpool, Liverpool, L69 3BX, UK.,The Abdus Salam International Centre for Theoretical Physics, 34151, Trieste, Italy
| | - Li-Min Liu
- Beijing Computational Science Research Centre, 100193, Beijing, China.,School of Physics, Beihang University, 100191, Beijing, China
| | - Gilberto Teobaldi
- Beijing Computational Science Research Centre, 100193, Beijing, China. .,Stephenson Institute for Renewable Energy and Department of Chemistry, The University of Liverpool, Liverpool, L69 3BX, UK.
| | - Pascale Launois
- Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris Sud, Université Paris Saclay, 91405, Orsay Cedex, France.
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21
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Su CY, Yang AC, Jiang JS, Yang ZH, Huang YS, Kang DY, Hua CC. Properties of Single-Walled Aluminosilicate Nanotube/Poly(vinyl alcohol) Aqueous Dispersions. J Phys Chem B 2017; 122:380-391. [DOI: 10.1021/acs.jpcb.7b10079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chien-You Su
- Department
of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
| | - An-Chih Yang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Jung-Shiun Jiang
- Department
of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
| | - Zhi-Huei Yang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Yan-Shu Huang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Dun-Yen Kang
- Department
of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Chi-Chung Hua
- Department
of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
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22
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Elliott JD, Poli E, Scivetti I, Ratcliff LE, Andrinopoulos L, Dziedzic J, Hine NDM, Mostofi AA, Skylaris C, Haynes PD, Teobaldi G. Chemically Selective Alternatives to Photoferroelectrics for Polarization-Enhanced Photocatalysis: The Untapped Potential of Hybrid Inorganic Nanotubes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2017; 4:1600153. [PMID: 28251044 PMCID: PMC5323885 DOI: 10.1002/advs.201600153] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 06/24/2016] [Indexed: 05/31/2023]
Abstract
Linear-scaling density functional theory simulation of methylated imogolite nanotubes (NTs) elucidates the interplay between wall-polarization, bands separation, charge-transfer excitation, and tunable electrostatics inside and outside the NT-cavity. The results suggest that integration of polarization-enhanced selective photocatalysis and chemical separation into one overall dipole-free material should be possible. Strategies are proposed to increase the NT polarization for maximally enhanced electron-hole separation.
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Affiliation(s)
- Joshua D. Elliott
- Stephenson Institute for Renewable Energy and Department of ChemistryUniversity of LiverpoolLiverpoolL69 3BXUK
| | - Emiliano Poli
- Stephenson Institute for Renewable Energy and Department of ChemistryUniversity of LiverpoolLiverpoolL69 3BXUK
| | - Ivan Scivetti
- Stephenson Institute for Renewable Energy and Department of ChemistryUniversity of LiverpoolLiverpoolL69 3BXUK
| | - Laura E. Ratcliff
- The Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondonSW7 2AZUK
| | - Lampros Andrinopoulos
- The Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondonSW7 2AZUK
| | - Jacek Dziedzic
- School of ChemistryUniversity of SouthamptonSouthamptonSO17 1BJUK
- Faculty of Applied Physics and MathematicsGdansk University of TechnologyGdansk80 233Poland
| | | | - Arash A. Mostofi
- The Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondonSW7 2AZUK
| | | | - Peter D. Haynes
- The Thomas Young Centre for Theory and Simulation of MaterialsImperial College LondonLondonSW7 2AZUK
| | - Gilberto Teobaldi
- Stephenson Institute for Renewable Energy and Department of ChemistryUniversity of LiverpoolLiverpoolL69 3BXUK
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23
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Liou KH, Kang DY, Lin LC. Investigating the Potential of Single-Walled Aluminosilicate Nanotubes in Water Desalination. Chemphyschem 2016; 18:179-183. [PMID: 27925378 DOI: 10.1002/cphc.201600900] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 10/23/2016] [Indexed: 11/08/2022]
Abstract
Water shortage has become a critical issue. To facilitate the large-scale deployment of reverse-osmosis water desalination to produce fresh water, discovering novel membranes is essential. Here, we computationally demonstrate the great potential of single-walled aluminosilicate nanotubes (AlSiNTs), materials that can be synthesized through scalable methods, in desalination. State-of-the-art molecular dynamics simulations were employed to investigate the desalination performance and structure-performance relationship of AlSiNTs. Free energy profiles, passage time distribution, and water density map were also analyzed to further understand the dependence of transport properties on diameter and water dynamics in the nanotubes. AlSiNTs with an inner diameter of 0.86 nm were found to fully reject NaCl ions while allowing orders of magnitude higher water fluxes compared to currently available reverse osmosis membranes, providing opportunities in water desalination.
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Affiliation(s)
- Kai-Hsin Liou
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan
| | - Dun-Yen Kang
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei, 10617, Taiwan
| | - Li-Chiang Lin
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 W. Woodruff Ave., Columbus, OH, 43210, USA
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24
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Lam CH, Yang AC, Chi HY, Chan KY, Hsieh CC, Kang DY. Microwave-Assisted Synthesis of Highly Monodispersed Single-Walled Alunminosilicate Nanotubes. ChemistrySelect 2016. [DOI: 10.1002/slct.201601492] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Chon Hei Lam
- Department of Chemical Engineering; National Taiwan University No. 1, Sec. 4; Roosevelt Road Taipei 10617 Taiwan
| | - An-Chih Yang
- Department of Chemical Engineering; National Taiwan University No. 1, Sec. 4; Roosevelt Road Taipei 10617 Taiwan
| | - Heng-Yu Chi
- Department of Chemical Engineering; National Taiwan University No. 1, Sec. 4; Roosevelt Road Taipei 10617 Taiwan
| | - Kuan-Ying Chan
- Department of Chemical Engineering; National Taiwan University No. 1, Sec. 4; Roosevelt Road Taipei 10617 Taiwan
| | - Chih-Chen Hsieh
- Department of Chemical Engineering; National Taiwan University No. 1, Sec. 4; Roosevelt Road Taipei 10617 Taiwan
| | - Dun-Yen Kang
- Department of Chemical Engineering; National Taiwan University No. 1, Sec. 4; Roosevelt Road Taipei 10617 Taiwan
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25
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Shafia E, Esposito S, Bahadori E, Armandi M, Manzoli M, Bonelli B. Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties. J Vis Exp 2016:54758. [PMID: 27911418 PMCID: PMC5226238 DOI: 10.3791/54758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
The goal of the protocol is to synthesize Fe-doped aluminosilicate nanotubes of the imogolite type with the formula (OH)3Al2-xFexO3SiOH. Doping with Fe aims at lowering the band gap of imogolite, an insulator with the chemical formula (OH)3Al2O3SiOH, and at modifying its adsorption properties towards azo-dyes, an important class of organic pollutants of both wastewater and groundwater. Fe-doped nanotubes are obtained in two ways: by direct synthesis, where FeCl3 is added to an aqueous mixture of the Si and Al precursors, and by post-synthesis loading, where preformed nanotubes are put in contact with a FeCl3•6H2O aqueous solution. In both synthesis methods, isomorphic substitution of Al3+ by Fe3+ occurs, preserving the nanotube structure. Isomorphic substitution is indeed limited to a mass fraction of ~1.0% Fe, since at a higher Fe content (i.e., a mass fraction of 1.4% Fe), Fe2O3 clusters form, especially when the loading procedure is adopted. The physicochemical properties of the materials are studied by means of X-ray powder diffraction (XRD), N2 sorption isotherms at -196 °C, high resolution transmission electron microscopy (HRTEM), diffuse reflectance (DR) UV-Vis spectroscopy, and ζ-potential measurements. The most relevant result is the possibility to replace Al3+ ions (located on the outer surface of the nanotubes) by post-synthesis loading on preformed imogolite without perturbing the delicate hydrolysis equilibria occurring during nanotube formation. During the loading procedure, an anionic exchange occurs, where Al3+ ions on the outer surface of the nanotubes are replaced by Fe3+ ions. In Fe-doped aluminosilicate nanotubes, isomorphic substitution of Al3+ by Fe3+ is found to affect the band gap of doped imogolite. Nonetheless, Fe3+ sites on the outer surface of nanotubes are able to coordinate organic moieties, like the azo-dye Acid Orange 7, through a ligand-displacement mechanism occurring in an aqueous solution.
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Affiliation(s)
- Ehsan Shafia
- Department of Applied Science and Technology, Politecnico di Torino
| | - Serena Esposito
- Department of Civil and Mechanical Engineering, Università degli Studi di Cassino e del Lazio Meridionale
| | - Elnaz Bahadori
- Department of Applied Science and Technology, Politecnico di Torino
| | - Marco Armandi
- Department of Applied Science and Technology, Politecnico di Torino; Institute of Chemistry, Politecnico di Torino
| | - Maela Manzoli
- Department of Chemistry & NIS Interdepartmental Centre, University of Turin
| | - Barbara Bonelli
- Department of Applied Science and Technology, Politecnico di Torino; Institute of Chemistry, Politecnico di Torino; INSTM Unit of Torino-Politecnico, Politecnico di Torino;
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26
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Reactivity of bare and Fe-doped alumino-silicate nanotubes (imogolite) with H2O2 and the azo-dye Acid Orange 7. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.10.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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cif2tube – Algorithm for constructing nanotube and nanoscroll models from crystallographic information files. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.08.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Yang AC, Li YS, Lam CH, Chi HY, Cheng IC, Kang DY. Solution-processed ultra-low-k thin films comprising single-walled aluminosilicate nanotubes. NANOSCALE 2016; 8:17427-17432. [PMID: 27722401 DOI: 10.1039/c6nr06106k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanotube-based ultra-low-k thin films with high Young's modulus composed of single-walled aluminosilicate nanotubes (AlSiNTs) and a trace amount of poly(vinyl alcohol) (PVA) have been developed. The dehydrated AlSiNT film possesses a relative permittivity of 1.05, and a Young's modulus of 25 GPa, which exceed those of most existing ultra-low-k materials.
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Affiliation(s)
- An-Chih Yang
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Yun-Shiuan Li
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Chon Hei Lam
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Heng-Yu Chi
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - I-Chun Cheng
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
| | - Dun-Yen Kang
- Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
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29
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Poli E, Elliott JD, Ratcliff LE, Andrinopoulos L, Dziedzic J, Hine NDM, Mostofi AA, Skylaris CK, Haynes PD, Teobaldi G. The potential of imogolite nanotubes as (co-)photocatalysts: a linear-scaling density functional theory study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:074003. [PMID: 26808452 DOI: 10.1088/0953-8984/28/7/074003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We report a linear-scaling density functional theory (DFT) study of the structure, wall-polarization absolute band-alignment and optical absorption of several, recently synthesized, open-ended imogolite (Imo) nanotubes (NTs), namely single-walled (SW) aluminosilicate (AlSi), SW aluminogermanate (AlGe), SW methylated aluminosilicate (AlSi-Me), and double-walled (DW) AlGe NTs. Simulations with three different semi-local and dispersion-corrected DFT-functionals reveal that the NT wall-polarization can be increased by nearly a factor of four going from SW-AlSi-Me to DW-AlGe. Absolute vacuum alignment of the NT electronic bands and comparison with those of rutile and anatase TiO2 suggest that the NTs may exhibit marked propensity to both photo-reduction and hole-scavenging. Characterization of the NTs' band-separation and optical properties reveal the occurrence of (near-)UV inside-outside charge-transfer excitations, which may be effective for electron-hole separation and enhanced photocatalytic activity. Finally, the effects of the NTs' wall-polarization on the absolute alignment of electron and hole acceptor states of interacting water (H2O) molecules are quantified and discussed.
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Affiliation(s)
- E Poli
- Stephenson Institute for Renewable Energy and Department of Chemistry, University of Liverpool, Liverpool L69 3BX, UK
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30
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Hadi P, Ning C, Kubicki JD, Mueller K, Fagan JW, Luo Z, Weng L, McKay G. Sustainable development of a surface-functionalized mesoporous aluminosilicate with ultra-high ion exchange efficiency. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00182j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The present work employs a facile hydroxylation technique to efficiently functionalize the surface of a waste-derived aluminosilicate for ultra-high heavy metal uptakeviaion exchange.
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Affiliation(s)
- Pejman Hadi
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - Chao Ning
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - James D. Kubicki
- Department of Geological Sciences
- University of Texas at El Paso
- El Paso
- USA
| | - Karl Mueller
- Department of Chemistry
- The Pennsylvania State University
- University Park
- USA
- Physical and Computational Sciences Directorate
| | - Jonathan W. Fagan
- Department of Chemistry
- The Pennsylvania State University
- University Park
- USA
| | - Zhengtang Luo
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
| | - Lutao Weng
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
- Materials Characterization and Preparation Facility
| | - Gordon McKay
- Chemical and Biomolecular Engineering Department
- Hong Kong University of Science and Technology
- Kowloon
- China
- Division of Sustainable Development
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Wang TP, Kang DY. Predictions of effective diffusivity of mixed matrix membranes with tubular fillers. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.03.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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32
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Halloysite nanotubes capturing isotope selective atmospheric CO2. Sci Rep 2015; 5:8711. [PMID: 25736700 PMCID: PMC4348623 DOI: 10.1038/srep08711] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/30/2015] [Indexed: 11/08/2022] Open
Abstract
With the aim to capture and subsequent selective trapping of CO2, a nanocomposite has been developed through selective modification of the outer surface of the halloysite nanotubes (HNTs) with an organosilane to make the nanocomposite a novel solid-phase adsorbent to adsorb CO2 from the atmosphere at standard ambient temperature and pressure. The preferential adsorption of three major abundant isotopes of CO2 (12C16O2, 13C16O2, and 12C16O18O) from the ambient air by amine functionalized HNTs has been explored using an optical cavity-enhanced integrated cavity output spectroscopy. CO2 adsorption/desorption cycling measurements demonstrate that the adsorbent can be regenerated at relatively low temperature and thus, recycled repeatedly to capture atmospheric CO2. The amine grafted halloysite shows excellent stability even in oxidative environments and has high efficacy of CO2 capture, introducing a new route to the adsorption of isotope selective atmospheric CO2.
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Avellan A, Levard C, Kumar N, Rose J, Olivi L, Thill A, Chaurand P, Borschneck D, Masion A. Structural incorporation of iron into Ge–imogolite nanotubes: a promising step for innovative nanomaterials. RSC Adv 2014. [DOI: 10.1039/c4ra08840a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Iron-doped aluminogermanate nanotubes were obtained using a single step, aqueous phase synthesis protocol, resulting in a novel nanomaterial.
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Affiliation(s)
| | | | - N. Kumar
- CEREGE
- CNRS
- Aix-Marseille Univ
- IRD
- UM34
| | - J. Rose
- CEREGE
- CNRS
- Aix-Marseille Univ
- IRD
- UM34
| | - L. Olivi
- ELETTRA
- Synchrotron Light Source
- 34012 Trieste, Italy
| | - A. Thill
- CEA Saclay
- IRAMIS
- Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire
- 91191 Gif sur Yvette, France
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