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Search for "precipitation" in Full Text gives 279 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Ultrasonication-assisted synthesis of CsPbBr3 and Cs4PbBr6 perovskite nanocrystals and their reversible transformation

  • Longshi Rao,
  • Xinrui Ding,
  • Xuewei Du,
  • Guanwei Liang,
  • Yong Tang,
  • Kairui Tang and
  • Jin Z. Zhang

Beilstein J. Nanotechnol. 2019, 10, 666–676, doi:10.3762/bjnano.10.66

Graphical Abstract
  • Scheme 1. Cs2CO3 and PbBr2 were loaded into the liquid paraffin/OAm/OA solution. Then, the precursors were processed by tip-sonication and purified via centrifuging in the presence of methyl acetate as precipitation agent. Subsequently, the sediment was redispersed in toluene for further characterization
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Published 06 Mar 2019

Topochemical engineering of composite hybrid fibers using layered double hydroxides and abietic acid

  • Liji Sobhana,
  • Lokesh Kesavan,
  • Jan Gustafsson and
  • Pedro Fardim

Beilstein J. Nanotechnol. 2019, 10, 589–605, doi:10.3762/bjnano.10.60

Graphical Abstract
  • -precipitation of layered double hydroxide (LDH) was performed to grow LDH crystals on the surface of the cellulose fibers, followed by the immobilization of abietic acid (AA) on LDH-grafted cellulose. Here we aimed to benefit from the hydrogen bonding between –OH groups of cellulose and LDH, and the –COOH
  • unbound cellulose fibers as prepared above were hybridized with Mg–Al LDH through in situ co-precipitation. Typically, 3.0 g of disintegrated fibers (oven dry mass) was dispersed in a flask containing mixed metal-salt solutions (Mg and Al nitrate, molar ratio 3:1) under gentle stirring until a homogenous
  • slurry was obtained. Aqueous solution of sodium carbonate was added dropwise to the reaction flask under constant magnetic stirring to ensure homogeneity of the reaction medium. The reaction was performed at room temperature and air atmosphere. The pH value of the co-precipitation medium was kept
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Published 28 Feb 2019

Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores

  • Kartheek Katta,
  • Dmitry Busko,
  • Yuri Avlasevich,
  • Katharina Landfester,
  • Stanislav Baluschev and
  • Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53

Graphical Abstract
  • dissolved in 2 mL of demineralized water and 200 µL of the latex dispersion was added to the solution. Afterwards, the precipitation of the oxide was carried out by adding dropwise 2 mL of aqueous NaOH solution (0.1 M) using a syringe pump (dropping speed of 1 mL·h−1). The addition of the base leads to the
  • precipitation of Ce(OH)3, which is insoluble in water. In an alkaline environment, Ce(OH)3 is spontaneously oxidized to hydrated Ce(IV) ions by the oxygen of the environment, and then hydrolyzed to form hydroxocomplexes, which eventually evolve to CeO2 [47]. The mixture was further stirred for 24 h to complete
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Published 22 Feb 2019

Geometrical optimisation of core–shell nanowire arrays for enhanced absorption in thin crystalline silicon heterojunction solar cells

  • Robin Vismara,
  • Olindo Isabella,
  • Andrea Ingenito,
  • Fai Tong Si and
  • Miro Zeman

Beilstein J. Nanotechnol. 2019, 10, 322–331, doi:10.3762/bjnano.10.31

Graphical Abstract
  • bombarding the surface of the sample. Such effect occurs with higher speed on the horizontal than on the vertical plane, due to the larger angle of incidence of ions hitting the vertical side walls, which leads to a strong anisotropy of the Si etching rate. The process is made mask-less by the precipitation
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Published 31 Jan 2019

Thermal control of the defunctionalization of supported Au25(glutathione)18 catalysts for benzyl alcohol oxidation

  • Zahraa Shahin,
  • Hyewon Ji,
  • Rodica Chiriac,
  • Nadine Essayem,
  • Franck Rataboul and
  • Aude Demessence

Beilstein J. Nanotechnol. 2019, 10, 228–237, doi:10.3762/bjnano.10.21

Graphical Abstract
  • did not inhibit high catalytic activity, in contrast, it was enhanced, which was similar to a recent reported work [25]. The catalyst performance was compared to a catalyst synthesized by the deposition-precipitation method of gold nanoparticles on ZrO2 nanoparticles, compound (B). The average
  • °C for 4 hours. The final product Au25(SG)18 was filtered, isolated by precipitation with methanol and centrifuged (10000 rpm for 15 minutes), washed several times with methanol (5000 rpm, 15 minutes), and was air-dried. Synthesis of the composite material Au25(SG)18@ZrO2 Gold cluster deposition Au25
  • air, with a rate of 2 °C/min. Synthesis of AuNP@ZrO2 by deposition-precipitation The synthesis of AuNP@ZrO2 was done according to a reported protocol [40]. An aqueous solution of tetrachloroauric acid trihydrate (1.5% by mass, in 10 mL H2O) was added dropwise to ZrO2 (1 g) dispersed in 30 mL H2O while
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Published 18 Jan 2019

Raman study of flash-lamp annealed aqueous Cu2ZnSnS4 nanocrystals

  • Yevhenii Havryliuk,
  • Oleksandr Selyshchev,
  • Mykhailo Valakh,
  • Alexandra Raevskaya,
  • Oleksandr Stroyuk,
  • Constance Schmidt,
  • Volodymyr Dzhagan and
  • Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2019, 10, 222–227, doi:10.3762/bjnano.10.20

Graphical Abstract
  • valence states (Cu+, Zn2+, Sn4+, S2−), Cu(II) was reduced to Cu(I) and Sn(II) was oxidized to Sn(IV) in situ during the NC formation. The concentration of the as-prepared CZTS colloids was around 30 g/L and can be further increased by solvent evaporation or a precipitation/redispersion procedure [21
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Published 17 Jan 2019

Uniform Sb2S3 optical coatings by chemical spray method

  • Jako S. Eensalu,
  • Atanas Katerski,
  • Erki Kärber,
  • Ilona Oja Acik,
  • Arvo Mere and
  • Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

Graphical Abstract
  • precipitation from a molten SbCl3–SC(NH2)2 mixture: A – Amorphous Sb2S3 islands nucleate on the rigid TiO2 substrate and grow by 3D Volmer–Weber growth, surrounded by a protective bubbling liquid film of volatile SbCl3 and TU decomposition products (1), eventually interconnecting by coalescence of sufficiently
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Published 15 Jan 2019

pH-mediated control over the mesostructure of ordered mesoporous materials templated by polyion complex micelles

  • Emilie Molina,
  • Mélody Mathonnat,
  • Jason Richard,
  • Patrick Lacroix-Desmazes,
  • Martin In,
  • Philippe Dieudonné,
  • Thomas Cacciaguerra,
  • Corine Gérardin and
  • Nathalie Marcotte

Beilstein J. Nanotechnol. 2019, 10, 144–156, doi:10.3762/bjnano.10.14

Graphical Abstract
  • hybrid organic–inorganic interface, which is necessary for directing the macroscopic precipitation of the hybrid material, can form through an interaction between the PEO neutral block and silicic species via the N0/I0 pathway, as in the case of SBA-type materials synthesized under acidic conditions, as
  • a fixed and well-defined value (ranging from 4 to 7.9) by adding a small amount of an aqueous NaOH solution (3 mol·L−1). This results in macroscopic precipitation, which occurs more or less rapidly according to the pH value (3 min at pH 5 and 0.5 min at pH 7.9). The mixture was stirred slowly for 24
  • oligomers, inducing sudden macroscopic precipitation in less than 3 min. Two different mass concentrations of the reaction medium, expressed by the wt % of DHBC, were used. The 3.9 wt % concentration was aimed at evaluating the influence of the pH on the texture, structure and chemical composition of the
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Published 11 Jan 2019

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

  • Florian Dumitrache,
  • Iuliana P. Morjan,
  • Elena Dutu,
  • Ion Morjan,
  • Claudiu Teodor Fleaca,
  • Monica Scarisoreanu,
  • Alina Ilie,
  • Marius Dumitru,
  • Cristian Mihailescu,
  • Adriana Smarandache and
  • Gabriel Prodan

Beilstein J. Nanotechnol. 2019, 10, 9–21, doi:10.3762/bjnano.10.2

Graphical Abstract
  • .) antimony by spray pyrolysis [9] or by sol–gel methods followed by spin-coating and annealing in different environments [10], ii.) manganese by long-time annealing of Mn/SnO2 bilayers in air at 200 °C [11] or by co-precipitation [12], iii.) aluminum, copper or indium all by spray pyrolysis from ethanolic
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Published 02 Jan 2019

Characterization and influence of hydroxyapatite nanopowders on living cells

  • Przemyslaw Oberbek,
  • Tomasz Bolek,
  • Adrian Chlanda,
  • Seishiro Hirano,
  • Sylwia Kusnieruk,
  • Julia Rogowska-Tylman,
  • Ganna Nechyporenko,
  • Viktor Zinchenko,
  • Wojciech Swieszkowski and
  • Tomasz Puzyn

Beilstein J. Nanotechnol. 2018, 9, 3079–3094, doi:10.3762/bjnano.9.286

Graphical Abstract
  • manufactured using many different methods, such as hydrothermal synthesis, sol–gel synthesis, wet-chemical precipitation and microwave processing [16][17][18][19]. Many studies have shown that HAp can cause different biological responses depending on its physicochemical properties [20][21][22]. It is also
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Published 27 Dec 2018

A novel polyhedral oligomeric silsesquioxane-modified layered double hydroxide: preparation, characterization and properties

  • Xianwei Zhang,
  • Zhongzhu Ma,
  • Hong Fan,
  • Carla Bittencourt,
  • Jintao Wan and
  • Philippe Dubois

Beilstein J. Nanotechnol. 2018, 9, 3053–3068, doi:10.3762/bjnano.9.284

Graphical Abstract
  • stirrer, (3-aminopropyl)triethoxysilane (30 mL), methanol (720 mL) and concentrated hydrochloric acid (60 mL) were added. The system was refluxed for 20 h under vigorous stirring and then cooled down to room temperature. The white precipitate was collected after precipitation in cold THF, filtration, and
  • succinic acid [38]. In detail, to a solution of OAPS (15 g) and triethylamine (15 mL) in methanol (750 mL), succinic anhydride (60 g) was added, and the reaction mixture was stirred vigorously for 2 h at room temperature. White solid was afforded after precipitation in cold chloroform, filtration and
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Published 19 Dec 2018

Co-intercalated layered double hydroxides as thermal and photo-oxidation stabilizers for polypropylene

  • Qian Zhang,
  • Qiyu Gu,
  • Fabrice Leroux,
  • Pinggui Tang,
  • Dianqing Li and
  • Yongjun Feng

Beilstein J. Nanotechnol. 2018, 9, 2980–2988, doi:10.3762/bjnano.9.277

Graphical Abstract
  • fabricated a series of novel co-intercalated thermal and photo-oxidation stabilizers (HnMn′-Ca2Al) through straightforward co-precipitation of HALS and MP-Ca (Figure 1) [16][17], and examined the resistance of the HnMn′-Ca2Al/PP composites against thermal degradation and photo-oxidation as a function of the
  • to the co-intercalation. The results show that co-precipitation yields Ca2Al-LDHs free of CaCO3 by-product [23]. Figure 3 shows FTIR spectra of all the HnMn′-Ca2Al-LDHs. One can observe characteristic stretching-vibration bands of LDHs, for example, the broad band at ca. 3445 cm−1 associated to the
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Published 05 Dec 2018

Layered calcium phenylphosphonate: a hybrid material for a new generation of nanofillers

  • Kateřina Kopecká,
  • Ludvík Beneš,
  • Klára Melánová,
  • Vítězslav Zima,
  • Petr Knotek and
  • Kateřina Zetková

Beilstein J. Nanotechnol. 2018, 9, 2906–2915, doi:10.3762/bjnano.9.269

Graphical Abstract
  • phenylphosphonate is formed at room temperature by a co-precipitation of starting compounds – phenylphosphonic acid and a soluble source of calcium (e.g., CaCl2, as in our case) in a 1:1 molar ratio at pH > 9, as reported by Svoboda et al. [18] and described in the Experimental section. The previous work was
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Published 20 Nov 2018

Nanostructure-induced performance degradation of WO3·nH2O for energy conversion and storage devices

  • Zhenyin Hai,
  • Mohammad Karbalaei Akbari,
  • Zihan Wei,
  • Danfeng Cui,
  • Chenyang Xue,
  • Hongyan Xu,
  • Philippe M. Heynderickx,
  • Francis Verpoort and
  • Serge Zhuiykov

Beilstein J. Nanotechnol. 2018, 9, 2845–2854, doi:10.3762/bjnano.9.265

Graphical Abstract
  • thin films displayed a maximum response of 80% for 1% of hydrogen gas at 250 °C [36]. 2D WO3·2H2O films developed by a facile dipping process exhibited a significantly improved response time as electrochromic electrodes compared to WO3 thin films [37]. The acidic precipitation reaction was also adopted
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Published 12 Nov 2018

Low cost tips for tip-enhanced Raman spectroscopy fabricated by two-step electrochemical etching of 125 µm diameter gold wires

  • Antonino Foti,
  • Francesco Barreca,
  • Enza Fazio,
  • Cristiano D’Andrea,
  • Paolo Matteini,
  • Onofrio Maria Maragò and
  • Pietro Giuseppe Gucciardi

Beilstein J. Nanotechnol. 2018, 9, 2718–2729, doi:10.3762/bjnano.9.254

Graphical Abstract
  • off immediately after the precipitation of the immersed wire portion in order to avoid over-etching, which would blunt the tip. Stop-voltage circuits have been developed [48][49] to automatize this task. The tips are finally washed by shaking in the etching solution and, subsequently, by pouring a few
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Published 22 Oct 2018

Cytotoxicity of doxorubicin-conjugated poly[N-(2-hydroxypropyl)methacrylamide]-modified γ-Fe2O3 nanoparticles towards human tumor cells

  • Zdeněk Plichta,
  • Yulia Kozak,
  • Rostyslav Panchuk,
  • Viktoria Sokolova,
  • Matthias Epple,
  • Lesya Kobylinska,
  • Pavla Jendelová and
  • Daniel Horák

Beilstein J. Nanotechnol. 2018, 9, 2533–2545, doi:10.3762/bjnano.9.236

Graphical Abstract
  • γ-Fe2O3 with PHPMA and P(HPMA-MMAA)-Dox First, PHPMA was prepared by precipitation polymerization and used as a coating of γ-Fe2O3 nanoparticles. Briefly, in an 100 mL Erlenmeyer flask, HPMA (2 g) freshly crystalized from ethyl acetate and AIBN (10 mg) were dissolved in ethyl acetate (18 mL) under
  • attributed to CH3 and CH2 groups of MMAA. Bands at ca. 2900 and at 1500–1350 cm−1 corresponded to stretching and bending vibrations of CH2 and CH3 groups, respectively. The first polymerization experiments involved the precipitation copolymerization of HPMA and MMAA. High molecular weight products (ca. 170
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Published 25 Sep 2018

Non-agglomerated silicon–organic nanoparticles and their nanocomplexes with oligonucleotides: synthesis and properties

  • Asya S. Levina,
  • Marina N. Repkova,
  • Nadezhda V. Shikina,
  • Zinfer R. Ismagilov,
  • Svetlana A. Yashnik,
  • Dmitrii V. Semenov,
  • Yulia I. Savinovskaya,
  • Natalia A. Mazurkova,
  • Inna A. Pyshnaya and
  • Valentina F. Zarytova

Beilstein J. Nanotechnol. 2018, 9, 2516–2525, doi:10.3762/bjnano.9.234

Graphical Abstract
  • conjugated with oligodeoxyribonucleotides (ODN) through the binding to the negatively charged internucleotide phosphate groups to form Si–NH2·ODN complexes. Like Si–NH2, the Si–NH2·ODN nanocomplexes are dissolved in aqueous solutions. The addition of NaCl did not lead to precipitation. Si–NH2 and Si–NH2·ODN
  • can be precipitated by acetone. The unbound oligonucleotide after precipitation of Si–NH2·ODN remains in solution and can be detected spectrophotometrically. This “acetone precipitation” technique allowed us to evaluate the optimal molar ratio of the amino groups in the nanoparticles to the phosphate
  • highest dilution of the virus, which caused the hemagglutination reaction. (a) Evaluation of molar ratio of the amino groups in the nanoparticles to the phosphate groups, NH2/p, for the complete binding of ODN(1) with Si–NH2 nanoparticles using the “acetone precipitation” technique. The amount of (1
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Published 21 Sep 2018

Droplet-based synthesis of homogeneous magnetic iron oxide nanoparticles

  • Christian D. Ahrberg,
  • Ji Wook Choi and
  • Bong Geun Chung

Beilstein J. Nanotechnol. 2018, 9, 2413–2420, doi:10.3762/bjnano.9.226

Graphical Abstract
  • concentration is increased by more than one order of magnitude in droplet reactions, the fast precipitation of large amounts of nanoparticles could lead to the buildup of nanoparticle deposits on the fused silica capillaries in some cases and to a blocking of the capillaries. The batch particles showed a zeta
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Published 10 Sep 2018

Hierarchical heterostructures of Bi2MoO6 microflowers decorated with Ag2CO3 nanoparticles for efficient visible-light-driven photocatalytic removal of toxic pollutants

  • Shijie Li,
  • Wei Jiang,
  • Shiwei Hu,
  • Yu Liu,
  • Yanping Liu,
  • Kaibing Xu and
  • Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 2297–2305, doi:10.3762/bjnano.9.214

Graphical Abstract
  • . Herein, we synthesized flower-like Ag2CO3/Bi2MoO6 heterostructures, in which Ag2CO3 nanoparticles were evenly anchored on Bi2MoO6 microflowers to construct novel hierarchical heterojunction photocatalysts by via in situ precipitation. The photocatalytic properties of Ag2CO3/Bi2MoO6 was measured regarding
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Published 27 Aug 2018

Synthesis of rare-earth metal and rare-earth metal-fluoride nanoparticles in ionic liquids and propylene carbonate

  • Marvin Siebels,
  • Lukas Mai,
  • Laura Schmolke,
  • Kai Schütte,
  • Juri Barthel,
  • Junpei Yue,
  • Jörg Thomas,
  • Bernd M. Smarsly,
  • Anjana Devi,
  • Roland A. Fischer and
  • Christoph Janiak

Beilstein J. Nanotechnol. 2018, 9, 1881–1894, doi:10.3762/bjnano.9.180

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  • on the liquid precipitation reaction between soluble rare-earth metal salts and alkaline fluorides. A co-thermolysis of Na(CF3COO) and RE(CF3COO) in oleic acid/oleylamine for the synthesis of NaREF4 (RE = Er(III), Tm(III)) has also been described [8]. One problem of these syntheses is that the
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Published 28 Jun 2018

Controllable one-pot synthesis of uniform colloidal TiO2 particles in a mixed solvent solution for photocatalysis

  • Jong Tae Moon,
  • Seung Ki Lee and
  • Ji Bong Joo

Beilstein J. Nanotechnol. 2018, 9, 1715–1727, doi:10.3762/bjnano.9.163

Graphical Abstract
  • , TBOT molecules have a high solubility in ethanol but not in acetonitrile [14]. As a result, when the concentration of ACN increases, the TBOT and its hydrolysate molecules are forced to form nucleates rapidly and to precipitate out of the solution [32][33]. This rapid nucleation and precipitation
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Published 08 Jun 2018

Nanocomposites comprised of homogeneously dispersed magnetic iron-oxide nanoparticles and poly(methyl methacrylate)

  • Sašo Gyergyek,
  • David Pahovnik,
  • Ema Žagar,
  • Alenka Mertelj,
  • Rok Kostanjšek,
  • Miloš Beković,
  • Marko Jagodič,
  • Heinrich Hofmann and
  • Darko Makovec

Beilstein J. Nanotechnol. 2018, 9, 1613–1622, doi:10.3762/bjnano.9.153

Graphical Abstract
  • enable the preparation of nanocomposite films by spin coating and the precipitation of a nanocomposite in a form that is easily milled into powders, for example. Therefore, it is desirable to develop synthesis methods to prepare them. In this paper we present a simple method for preparing magnetic iron
  • nanoparticles is related to the lower yield of precipitation of PMMA, decreasing the amount of isolated PMMA. PMMA is not soluble in pure methanol, however, in our case we precipitated nanocomposites by adding methanol to the suspension in toluene. In the precipitation mixture of toluene and methanol, a small
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Published 01 Jun 2018

Sheet-on-belt branched TiO2(B)/rGO powders with enhanced photocatalytic activity

  • Huan Xing,
  • Wei Wen and
  • Jin-Ming Wu

Beilstein J. Nanotechnol. 2018, 9, 1550–1557, doi:10.3762/bjnano.9.146

Graphical Abstract
  • time of 2 h, TiO2 dots were found to be distributed homogeneously on the TGN surface. The nanosheet branches grew continuously upon further precipitation for up to 24 h. The transmission electron microscopy (TEM) image illustrates the precipitation of branched nanobelts on rGO surfaces (labelled as G
  • constant of the present “sheet-on-belt” branched TiO2(B)/rGO photocatalyst is 1.7 times that of TiO2(B)/rGO and 2.9 times that of pristine TiO2(B) nanobelts. Experimental Material synthesis 1. Precursor solution: The precursor solution for precipitation of nanosheet branches was prepared following Wen et
  • TGN-branch x h, where x refers to the precipitation time in the precursor solution. Characterization The morphology was examined by field emission scanning electron microscopy (FESEM, Hitachi S-4800) and transmission electron microscopy (TEM, JEM-2100). The X-ray diffraction (XRD) patterns were
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Published 24 May 2018

Surface characterization of nanoparticles using near-field light scattering

  • Eunsoo Yoo,
  • Yizhong Liu,
  • Chukwuazam A. Nwasike,
  • Sebastian R. Freeman,
  • Brian C. DiPaolo,
  • Bernardo Cordovez and
  • Amber L. Doiron

Beilstein J. Nanotechnol. 2018, 9, 1228–1238, doi:10.3762/bjnano.9.114

Graphical Abstract
  • , which was greater than that of PEG-SPIOs and IPC-SPIOs, likely due to aggregation and polydispersity of the sample synthesized using the co-precipitation method. The zeta potential of the uncoated SPIOs is strongly negative (−50 mV), while the zeta potential of PEG-SPIOs is slightly higher (−45 mV) due
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Published 18 Apr 2018

Understanding the performance and mechanism of Mg-containing oxides as support catalysts in the thermal dry reforming of methane

  • Nor Fazila Khairudin,
  • Mohd Farid Fahmi Sukri,
  • Mehrnoush Khavarian and
  • Abdul Rahman Mohamed

Beilstein J. Nanotechnol. 2018, 9, 1162–1183, doi:10.3762/bjnano.9.108

Graphical Abstract
  • determining the activity and the selectivity of the catalysts are the dispersion and the physico-chemical characteristics of active metals on the support catalyst. Three general approaches are applied for the catalyst preparation, including (i) deposition of active metals onto a support; (ii) precipitation of
  • . Zanganeh et al. [34] used the co-precipitation method to prepare a NiO–MgO nanocrystalline solid solution catalyst. High Ni (25 wt %) content negatively affected the supression of carbon deposition on the solid solution catalyst. However, high Ni dispersion and the basicity of the support surface could
  • co-precipitation methods for the preparation of a Ni–MgO–Al2O3 catalyst. The Ni particle size was uniformly distributed in the catalysts prepared via sol–gel. TGA results clearly showed that 13% and 7.7% carbon was deposited on the catalysts prepared via the sol–gel method and the co-precipitation
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Published 13 Apr 2018
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