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Search for "mesoporous" in Full Text gives 198 result(s) in Beilstein Journal of Nanotechnology.

Hierarchically structured nanoporous carbon tubes for high pressure carbon dioxide adsorption

  • Julia Patzsch,
  • Deepu J. Babu and
  • Jörg J. Schneider

Beilstein J. Nanotechnol. 2017, 8, 1135–1144, doi:10.3762/bjnano.8.115

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  • tubes. Keywords: carbon dioxide adsorption; carbon tubes; gas adsorption; mesoporous carbon; Introduction Nanostructured carbon and silicon carbide materials have numerous potential applications. Structured carbons such as graphene, carbon nanotubes, carbon fibres or hierarchical porous carbons were
  • mesoporous carbon [8], single-wall carbon nanotubes (CNTs) [9], multiwall CNTs [10], double-wall aligned CNTs [11] as well as graphene [12]. In the case of (ii), oxygen groups such as C–O and C=O were introduced on the carbon surface to enhance the adsorption of gases such as CO2 [11]. Silicon carbide is
  • reduction at high temperatures (≈1300 °C) [22][23] or magnesio-thermic reduction at moderate temperatures (≈700 °C) [24]. Following these approaches, SiC nanotubes were successfully synthesized by reaction with CNTs [25][26], with porous aerogels [27], fibres [28], and ordered mesoporous SiC structures
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Published 24 May 2017

Investigation of growth dynamics of carbon nanotubes

  • Marianna V. Kharlamova

Beilstein J. Nanotechnol. 2017, 8, 826–856, doi:10.3762/bjnano.8.85

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  • -1 (mesoporous SiO2) support. 59.1% of semiconducting SWCNTs had the (9,8) chirality. It was suggested that strong metal-support interaction stabilized the Co clusters with a narrow diameter distribution around 1.2 nm, which were responsible for the selective growth of the (9,8) tubes. In [123], the
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Published 11 Apr 2017

Recombinant DNA technology and click chemistry: a powerful combination for generating a hybrid elastin-like-statherin hydrogel to control calcium phosphate mineralization

  • Mohamed Hamed Misbah,
  • Mercedes Santos,
  • Luis Quintanilla,
  • Christina Günter,
  • Matilde Alonso,
  • Andreas Taubert and
  • José Carlos Rodríguez-Cabello

Beilstein J. Nanotechnol. 2017, 8, 772–783, doi:10.3762/bjnano.8.80

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  • in (composite) materials for bone regeneration [2][8]. Due to the correlation between the (crystal) structure and properties of CP, it is important to be able to control its nanostructures [9][10][11]. For example, hollow and mesoporous CP particles can be used for drug delivery due to their high
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Published 04 Apr 2017

First examples of organosilica-based ionogels: synthesis and electrochemical behavior

  • Andreas Taubert,
  • Ruben Löbbicke,
  • Barbara Kirchner and
  • Fabrice Leroux

Beilstein J. Nanotechnol. 2017, 8, 736–751, doi:10.3762/bjnano.8.77

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  • supercapacitor has a capacitance up to 90 F/g at room temperature [26]. Ameri et al. made IG transistors using graphene [27] for low voltage operation. Using a slightly different approach, Hesemann and coworkers and Néouze and coworkers incorporated IL-like functionalities into periodic mesoporous organosilicas
  • box used for the experiments. Results Silica monoliths As stated in the introduction, mesoporous silica monoliths are often brittle and thus difficult to handle. The first goal of the current study is thus to provide a synthetic protocol towards more robust silica matrix materials suitable for IL
  • ) pattern. All SAXS patterns show a strong scattering signal with a typical q−4 behavior indicating an amorphous, mesoporous system with strong phase boundaries and cylindrical pores, but without ordered mesopores [37]. This is confirmed by nitrogen sorption measurements, Figure 6. All monoliths show a type
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Published 29 Mar 2017

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

  • Arpita Jana,
  • Elke Scheer and
  • Sebastian Polarz

Beilstein J. Nanotechnol. 2017, 8, 688–714, doi:10.3762/bjnano.8.74

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  • higher than the efficiency of TiO2 nanospheres (65%) [97]. The graphene-based nanoarchitecture of TiO2 nanospindles [98], TiO2 nanorods [92] and TiO2 mesoporous [99] shows improved photocatalytic performance via structural optimisation of the architecture. Although most of the applications of graphene
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Published 24 Mar 2017

Carbon nanotube-wrapped Fe2O3 anode with improved performance for lithium-ion batteries

  • Guoliang Gao,
  • Yan Jin,
  • Qun Zeng,
  • Deyu Wang and
  • Cai Shen

Beilstein J. Nanotechnol. 2017, 8, 649–656, doi:10.3762/bjnano.8.69

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  • . of composite materials. In this method, an Fe-based metal organic framework [MIL-88B (Fe)] was used as a precursor for the synthesis of spindle-like α-Fe2O3 nanoparticles with a mesoporous structure of less than 20 nm. When used as anode material for LIBs, these nanoparticles demonstrated a capacity
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Published 17 Mar 2017

Fiber optic sensors based on hybrid phenyl-silica xerogel films to detect n-hexane: determination of the isosteric enthalpy of adsorption

  • Jesús C. Echeverría,
  • Ignacio Calleja,
  • Paula Moriones and
  • Julián J. Garrido

Beilstein J. Nanotechnol. 2017, 8, 475–484, doi:10.3762/bjnano.8.51

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  • hysteresis loops of type H-2, according to the International Union of Pure and Applied Chemistry classification [17]. The Type IV isotherms are characteristic of mesoporous materials common in many inorganic oxide gels having interconnected pore networks. The amount of adsorbed N2 decreased with an increase
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Published 21 Feb 2017

The longstanding challenge of the nanocrystallization of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)

  • Florent Pessina and
  • Denis Spitzer

Beilstein J. Nanotechnol. 2017, 8, 452–466, doi:10.3762/bjnano.8.49

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  • . By drying with heating or at low pressure, a xerogel with higher density is obtained. If supercritical CO2 is used to extract the solvent, an aerogel with low density is formed. Therefore, the nanostructured nature of the explosive comes from the porous matrix: cavities of mesoporous gels are 2 to 50
  • without RDX). Wuillaume et al. [28] trapped ammonium perchlorate (AP) and RDX in a mesoporous low-density energetic organogel. During the impact test, a negligible decrease of sensitivity was measured: 75 wt % RDX nanogels and macrogels had the same sensitivity and the 90 wt % nanogels are even more
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Published 17 Feb 2017

Tailoring bifunctional hybrid organic–inorganic nanoadsorbents by the choice of functional layer composition probed by adsorption of Cu2+ ions

  • Veronika V. Tomina,
  • Inna V. Melnyk,
  • Yuriy L. Zub,
  • Aivaras Kareiva,
  • Miroslava Vaclavikova,
  • Gulaim A. Seisenbaeva and
  • Vadim G. Kessler

Beilstein J. Nanotechnol. 2017, 8, 334–347, doi:10.3762/bjnano.8.36

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  • opportunities, and in [20] the results dealing with the synthesis, structure, and properties of polysiloxane xerogels with bifunctional surface layers were summarized. In the beginning of the 21st century, the studies of synthesis of mesoporous silicas functionalized with various groups emerged, [21][22
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Published 02 Feb 2017

Functionalized TiO2 nanoparticles by single-step hydrothermal synthesis: the role of the silane coupling agents

  • Antoine R. M. Dalod,
  • Lars Henriksen,
  • Tor Grande and
  • Mari-Ann Einarsrud

Beilstein J. Nanotechnol. 2017, 8, 304–312, doi:10.3762/bjnano.8.33

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  • the crystallite sizes determined by XRD, which suggest only weakly agglomeration in the powders after drying. The nitrogen adsorption and desorption isotherms of TiO2 and in situ surface-functionalized TiO2 nanoparticles demonstrate the hysteresis profile similar to mesoporous materials (Figure 4a
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Published 31 Jan 2017

Performance of natural-dye-sensitized solar cells by ZnO nanorod and nanowall enhanced photoelectrodes

  • Saif Saadaoui,
  • Mohamed Aziz Ben Youssef,
  • Moufida Ben Karoui,
  • Rached Gharbi,
  • Emanuele Smecca,
  • Vincenzina Strano,
  • Salvo Mirabella,
  • Alessandra Alberti and
  • Rosaria A. Puglisi

Beilstein J. Nanotechnol. 2017, 8, 287–295, doi:10.3762/bjnano.8.31

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  • represents the photoelectrode, composed of a wide band gap semiconductor thin layer coated on transparent conducting oxide (TCO) films. A mesoporous film layer is used as a semiconductor in the photoelectrode. Because of its stability and easy synthesis, titanium dioxide (TiO2) is mostly used as the
  • ) has been studied as a mesoporous wide band gap semiconductor for use in DSSCs. It presents itself in the form of different morphological nanostructures, such as nanorods, nanocrystals, nanowires, nanotubes and nanowalls that can be exploited to optimize the dye loading [6][7][8][9]. The main purpose
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Published 30 Jan 2017

Phosphorus-doped silicon nanorod anodes for high power lithium-ion batteries

  • Chao Yan,
  • Qianru Liu,
  • Jianzhi Gao,
  • Zhibo Yang and
  • Deyan He

Beilstein J. Nanotechnol. 2017, 8, 222–228, doi:10.3762/bjnano.8.24

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  • with mesoporous carbon and crystalline TiO2 as the double shells. It delivered a high reversible capacity of 1726 mAh/g over 100 cycles [10]. Among various nanostructured Si anodes, the electrodes prepared by depositing Si layers directly on nanostructured current collectors always shows an improved
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Published 23 Jan 2017

Effect of nanostructured carbon coatings on the electrochemical performance of Li1.4Ni0.5Mn0.5O2+x-based cathode materials

  • Konstantin A. Kurilenko,
  • Oleg A. Shlyakhtin,
  • Oleg A. Brylev,
  • Dmitry I. Petukhov and
  • Alexey V. Garshev

Beilstein J. Nanotechnol. 2016, 7, 1960–1970, doi:10.3762/bjnano.7.187

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  • observed, while for cross-linked PVA islands of mesoporous carbon are located on the boundaries of Li1.4Ni0.5Mn0.5O2+x particles. The presence of the carbon framework leads to a decrease of the polarization upon cycling and of the charge transfer resistance and to an increase in the apparent Li+ diffusion
  • PVA, the polymer pyrolysis tentatively occurs without preliminary melting. The pyrolysis of PVA particles allocated in the voids between LNM crystallites results in forming mesoporous particulates of amorphous carbon in the interparticular space. Another difference between the pyrolysis products of
  • of a carbon nanocoating and/or a mesoporous carbon framework does not alter the mechanism of lithium insertion–extraction into the Li1.4Ni0.5Mn0.5O2 structure but improves its kinetic and electrochemical properties. It is shown that even the nanosized layer of carbon complicates the transformation of
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Published 09 Dec 2016

Chitosan-based nanoparticles for improved anticancer efficacy and bioavailability of mifepristone

  • Huijuan Zhang,
  • Fuqiang Wu,
  • Yazhen Li,
  • Xiping Yang,
  • Jiamei Huang,
  • Tingting Lv,
  • Yingying Zhang,
  • Jianzhong Chen,
  • Haijun Chen,
  • Yu Gao,
  • Guannan Liu and
  • Lee Jia

Beilstein J. Nanotechnol. 2016, 7, 1861–1870, doi:10.3762/bjnano.7.178

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  • could be another reason for the enhanced anti-proliferative efficiency of MCN. In our previous report, we loaded MIF into mesoporous silica nanoparticles (MSNs) coated with aEpCAM (aE-MSN-M) to target circulating tumor cells for cancer metastasis prevention, and also found that MIF entrapped in aE-MSN-M
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Published 28 Nov 2016

In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

  • Jingxia Yang,
  • Johannes Ofner,
  • Bernhard Lendl and
  • Ulrich Schubert

Beilstein J. Nanotechnol. 2016, 7, 1815–1821, doi:10.3762/bjnano.7.174

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  • Figure 5, left. Only rGO(0.2)–CeO2 is mesoporous, according to the IUPAC classification, while the others contain mainly micropores and a small portion of mesopores. This can also be seen from the pore size distribution (Figure 5, right). rGO(0.2)–CeO2 has an average pore size of 4.8 nm, while the other
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Published 23 Nov 2016

Nanostructured TiO2-based gas sensors with enhanced sensitivity to reducing gases

  • Wojciech Maziarz,
  • Anna Kusior and
  • Anita Trenczek-Zajac

Beilstein J. Nanotechnol. 2016, 7, 1718–1726, doi:10.3762/bjnano.7.164

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  • ], there are several possible explanations for this phenomenon. The first is related to formation of titanium vacancies, VTi, in the flower-like structure during synthesis. Upon Ti foil oxidation by H2O2, a mesoporous hierarchical structure is formed. The three-step process includes, inter alia
  • composition on the sensitivity should be considered. Firstly, morphological differences between the thin layer and flower-like structures affects the surface-to-volume ratio and thus number of active sites where gaseous molecules can be adsorbed. It is obvious that a mesoporous network system exhibits a large
  • time down to several seconds. Due to the complex mesoporous structure, gas desorption was difficult, which influenced recovery time of the flower-like 3D samples. This work suggests that SnO2-decorated flower-like TiO2 3D nanostructures are a promising material for application as a CO(CH3)2 sensor
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Published 15 Nov 2016

Sb2S3 grown by ultrasonic spray pyrolysis and its application in a hybrid solar cell

  • Erki Kärber,
  • Atanas Katerski,
  • Ilona Oja Acik,
  • Arvo Mere,
  • Valdek Mikli and
  • Malle Krunks

Beilstein J. Nanotechnol. 2016, 7, 1662–1673, doi:10.3762/bjnano.7.158

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  • hole conductor coupled with inorganic materials leads to the notation of a hybrid solar cell [13]. Based on dense TiO2 covered by mesoporous TiO2 and then impregnated with a light harvester, the resulting solar cells are commonly referred to as mesoscopic solar cells [14] the first of which, based on
  • efficiencies of up to 2.3% when based on planar TiO2 [12] and 6.4% [20] when based on mesoporous TiO2. Spin coating is a simple technique and seems attractive for the deposition of oxide-free Sb2S3 absorber. However, an annealing stage at 300 °C in inert gas atmosphere is involved. Chemical spray pyrolysis
  • comparable to that obtained in a similar planar device that uses Sb2S3 prepared by spin coating [12] and lower than that obtained in a cell that uses mesoporous TiO2 and P3HT [3]. The current density of 6 mA·cm−2 is on the low side when compared to values above 10 mA·cm−2 obtained in devices that rely on the
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Published 10 Nov 2016

Polystyrene-block-poly(ethylene oxide) copolymers as templates for stacked, spherical large-mesopore silica coatings: dependence of silica pore size on the PS/PEO ratio

  • Roberto Nisticò,
  • Giuliana Magnacca,
  • Sushilkumar A. Jadhav and
  • Dominique Scalarone

Beilstein J. Nanotechnol. 2016, 7, 1454–1460, doi:10.3762/bjnano.7.137

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  • ; mesoporous silica; soft templating; sol–gel; Introduction Mesoporous materials with large, tunable porosity are currently being investigated as selective molecular sieves, finding potential applications in many fields such as catalysis, encapsulation of proteins, filtration and separation of large molecules
  • -coating deposition, is the easiest and the most versatile way for preparing well-organized, mesoporous, thin films. Among all the different templating approaches, the most widely used for the synthesis of nanostructured porous and high surface area oxides are soft templating (endotemplating) and hard
  • -b-PEO) [23], are among the most widely used soft templating agents to produce mesoporous silica. The templating process is based on the well-known attractive interaction between the silanol groups at the silica surface and PEO moieties [24]. In addition to Pluronics, other PEO containing amphiphilic
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Published 14 Oct 2016

Mesoporous hollow carbon spheres for lithium–sulfur batteries: distribution of sulfur and electrochemical performance

  • Anika C. Juhl,
  • Artur Schneider,
  • Boris Ufer,
  • Torsten Brezesinski,
  • Jürgen Janek and
  • Michael Fröba

Beilstein J. Nanotechnol. 2016, 7, 1229–1240, doi:10.3762/bjnano.7.114

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  • been carried out on nanostructured carbon hosts for sulfur storage including carbon fibers [13][14], carbon nanotubes [15][16], graphene/graphene oxide [17][18][19] as well as micro-/mesoporous carbons [20][21][22]. Among the porous carbons, especially hollow carbon spheres (HCS) have attracted
  • analysis of sulfur distribution in hollow carbon spheres with a mesoporous shell by combining the results from non-vacuum methods, namely X-ray diffraction (XRD) and Raman spectroscopy, with those from vacuum-based ones (SEM and nitrogen physisorption). Moreover, we examined the influence of the pressure
  • mg·cm−2 was investigated. Results and Discussion Silica template and hollow carbon spheres Hollow carbon spheres with a mesoporous shell were obtained by impregnation of silica spheres with a core–shell structure with phenol and formaldehyde (first step in Figure 1). Carbonization under inert atmosphere
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Published 30 Aug 2016

Fast diffusion of silver in TiO2 nanotube arrays

  • Wanggang Zhang,
  • Yiming Liu,
  • Diaoyu Zhou,
  • Hui Wang,
  • Wei Liang and
  • Fuqian Yang

Beilstein J. Nanotechnol. 2016, 7, 1129–1140, doi:10.3762/bjnano.7.105

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  • structures, including nanotubes, nanoparticles, nanorods, mesoporous spheres, nanosheets, nanowires have been synthesized via anodic oxidation, template, and hydrothermal processing to increase the ratio of surface area to volume for the maximization of effective surface area [17]. Among the low-dimensional
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Published 03 Aug 2016

Cantilever bending based on humidity-actuated mesoporous silica/silicon bilayers

  • Christian Ganser,
  • Gerhard Fritz-Popovski,
  • Roland Morak,
  • Parvin Sharifi,
  • Benedetta Marmiroli,
  • Barbara Sartori,
  • Heinz Amenitsch,
  • Thomas Griesser,
  • Christian Teichert and
  • Oskar Paris

Beilstein J. Nanotechnol. 2016, 7, 637–644, doi:10.3762/bjnano.7.56

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  • Institute of Inorganic Chemistry, Graz University of Technology, Austria Chair of Chemistry of Polymeric Materials, Montanuniversitaet Leoben, Austria 10.3762/bjnano.7.56 Abstract We use a soft templating approach in combination with evaporation induced self-assembly to prepare mesoporous films containing
  • humidity. We also investigate a similar film on bulk silicon substrate using grazing-incidence small-angle X-ray scattering (GISAXS), in order to determine nanostructural parameters of the film as well as the water-sorption-induced deformation of the ordered mesopore lattice. The strain of the mesoporous
  • bending; grazing incidence small-angle X-ray scattering (GISAXS); mesoporous film; sorption-induced deformation; Introduction Because the bending of a microcantilever can be measured with extremely high accuracy, sensors utilizing this principle are in focus of recent research. Such sensors are able, for
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Published 28 Apr 2016

Influence of wide band gap oxide substrates on the photoelectrochemical properties and structural disorder of CdS nanoparticles grown by the successive ionic layer adsorption and reaction (SILAR) method

  • Mikalai V. Malashchonak,
  • Alexander V. Mazanik,
  • Olga V. Korolik,
  • Еugene А. Streltsov and
  • Anatoly I. Kulak

Beilstein J. Nanotechnol. 2015, 6, 2252–2262, doi:10.3762/bjnano.6.231

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  • titanium, respectively. Mesoporous In2O3 films were prepared by spin coating of an indium hydroxide colloidal solution with subsequent heat treatment [36]. A stable indium hydroxide sol was prepared by hydrolysis of a 0.25 mol/L In(NO3)3 solution with aqueous ammonia (12%) under vigorous stirring at 0 °C
  • water, air-dried and heat-treated at 450 °C for 1 h in air. Mesoporous zinc oxide films were prepared by the electrochemical cathodic deposition from water–ethanol (1:1 by volume) electrolyte containing 0.1 mol/L Zn(NO3)2, 0.1 mol/L KCl and 4 g/L poly(vinylpyrrolidone) at 50 °C [18][38]. Deposition was
  • detected using a thermostated CCD matrix with a signal acquisition time typically equal to 120 s. Calibration was performed by means of a built-in gas discharge lamp to an accuracy of ≈1 cm−1. SEM images of In2O3 mesoporous films (a,d), ZnO platelet crystallites (b,e) and anodic TiO2 nanotubes (c,f
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Published 30 Nov 2015

Selective porous gates made from colloidal silica nanoparticles

  • Roberto Nisticò,
  • Paola Avetta,
  • Paola Calza,
  • Debora Fabbri,
  • Giuliana Magnacca and
  • Dominique Scalarone

Beilstein J. Nanotechnol. 2015, 6, 2105–2112, doi:10.3762/bjnano.6.215

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  • hexagonally ordered pores were also employed as substrate for MCM-48 silica films, giving promising results [4][23][24]. The sol–gel polymerization process is a key procedure for the bottom-up synthesis of nano- and mesoporous silica films and in the literature there are several reviews focusing on this field
  • [25][26]. Conventional procedures for the synthesis of mesoporous silica involve the use of amphiphilic templates [27][28][29][30]. Either low molecular weight surfactants or polymers have been used as structure-directing agents in the preparation of organic–inorganic hybrid solutions and they have
  • dye methylene blue (MB, molecular weight (MW) = 320 Da) and the cationic protein ribonuclease A (RNAse, MW = 13700 Da). Results and Discussion Synthesis, preparation and physicochemical characterization of the colloidal silica nanoparticles and mesoporous coatings Amphiphilic block copolymers in
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Published 04 Nov 2015

Peptide-equipped tobacco mosaic virus templates for selective and controllable biomineral deposition

  • Klara Altintoprak,
  • Axel Seidenstücker,
  • Alexander Welle,
  • Sabine Eiben,
  • Petia Atanasova,
  • Nina Stitz,
  • Alfred Plettl,
  • Joachim Bill,
  • Hartmut Gliemann,
  • Holger Jeske,
  • Dirk Rothenstein,
  • Fania Geiger and
  • Christina Wege

Beilstein J. Nanotechnol. 2015, 6, 1399–1412, doi:10.3762/bjnano.6.145

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  • example, as a structural modifier or filler in rubber [1], food [2][3] or healthcare products [4], bioceramics for medical purposes [5], mesoporous nanoparticulate or tubular drug delivery systems as reviewed in [6], sensor surfaces [7], or biocatalytic formulations as reviewed in [8]. An important focus
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Published 25 Jun 2015

Self-assembly of nanostructures and nanomaterials

  • Isabelle Berbezier and
  • Maurizio De Crescenzi

Beilstein J. Nanotechnol. 2015, 6, 1397–1398, doi:10.3762/bjnano.6.144

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  • , quantum properties and applications of nanoscale assemblies to advanced devices. The main topics of interest involve 2D nanomaterials such as nanomembranes, graphene, silicene and ordered mesoporous oxides, 1D nanomaterials such as nanowires and nanotubes, and 0D nanomaterials such as quantum dots
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Published 24 Jun 2015
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