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Search for "hydrothermal" in Full Text gives 221 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Solution combustion synthesis of a nanometer-scale Co3O4 anode material for Li-ion batteries

  • Monika Michalska,
  • Huajun Xu,
  • Qingmin Shan,
  • Shiqiang Zhang,
  • Yohan Dall'Agnese,
  • Yu Gao,
  • Amrita Jain and
  • Marcin Krajewski

Beilstein J. Nanotechnol. 2021, 12, 424–431, doi:10.3762/bjnano.12.34

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  • been proposed including sol–gel methods [4][6][13][14][15], sol–electrospinning techniques [16][17][18][19], hydrothermal and solvothermal syntheses [20][21][22][23][24][25][26][27][28], precipitation and co-precipitation [29][30][31], chemical thermal decomposition and pyrolysis [32][33][34][35][36
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Published 10 May 2021

A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures

  • Sina Kaabipour and
  • Shohreh Hemmati

Beilstein J. Nanotechnol. 2021, 12, 102–136, doi:10.3762/bjnano.12.9

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  • with various combinations (i.e. hybrid compounds), allowing the process to be adjusted accordingly in order to yield the desired complex product with tuned physiochemical characteristics [146]. In addition, combined with the hydrothermal approach (synthesis in a hot aqueous environment under high
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Published 25 Jan 2021

Bulk chemical composition contrast from attractive forces in AFM force spectroscopy

  • Dorothee Silbernagl,
  • Media Ghasem Zadeh Khorasani,
  • Natalia Cano Murillo,
  • Anna Maria Elert and
  • Heinz Sturm

Beilstein J. Nanotechnol. 2021, 12, 58–71, doi:10.3762/bjnano.12.5

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  • different sources was used. For the second sample, boehmite was hydrothermally synthesized from elementary Al. The hydrothermal route is described elsewhere [16][37]. For the third sample, commercially available boehmite NP (HP14, Sasol) with an average primary size of 20 nm was acquired. The boehmite NP
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Published 18 Jan 2021

ZnO and MXenes as electrode materials for supercapacitor devices

  • Ameen Uddin Ammar,
  • Ipek Deniz Yildirim,
  • Feray Bakan and
  • Emre Erdem

Beilstein J. Nanotechnol. 2021, 12, 49–57, doi:10.3762/bjnano.12.4

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  • specific capacitance of the resultant composites was twice as high as that of Co(OH)2 nanosheets [17]. Liu et al. synthesized a MXene/nickel sulfide (NiS) nanocomposite using a basic hydrothermal technique and measured a specific capacitance of 857.8 F·g−1. NiS has advantages such as good conductivity and
  • increased capacitance of 226 F·g−1 at 1 A·g-1 [22]. Xia et al. used a Ti3C2Tx MXene electrode decorated with nickel oxide (NiO) nanosheets. The electrode was synthesized via a hydrothermal method. The electrode used in a supercapacitor showed an excellent specific capacitance of 80 F·g−1 and an energy
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Published 13 Jan 2021

Unravelling the interfacial interaction in mesoporous SiO2@nickel phyllosilicate/TiO2 core–shell nanostructures for photocatalytic activity

  • Bridget K. Mutuma,
  • Xiluva Mathebula,
  • Isaac Nongwe,
  • Bonakele P. Mtolo,
  • Boitumelo J. Matsoso,
  • Rudolph Erasmus,
  • Zikhona Tetana and
  • Neil J. Coville

Beilstein J. Nanotechnol. 2020, 11, 1834–1846, doi:10.3762/bjnano.11.165

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  • phyllosilicate can be obtained either by a hydrothermal method or a deposition-precipitation method, the 2:1 nickel phyllosilicate is only formed under hydrothermal conditions [32][33][34]. Recently, several researchers have reported on the generation of nickel phyllosilicate catalysts for hydrogenation
  • reactions, methane reforming, and hydrogen evolution [35][36][37][38][39][40]. Wang et al. [38] reported the growth of nickel phyllosilicate by simultaneous reaction of a silica precursor (tetraethylorthosilicate), nickel chloride, water, and urea in a hydrothermal reactor at 210 °C for 12 h. They obtained
  • obtained via a hydrothermal treatment method using solid SiO2 spheres, urea, and nickel nitrate hexahydrate. Although NiPS compounds are extensively used as catalysts, to our knowledge, reports on the use of core–shell based nickel–phyllosilicate composites in dye photodegradation are yet to be reported
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Published 09 Dec 2020

Self-standing heterostructured NiCx-NiFe-NC/biochar as a highly efficient cathode for lithium–oxygen batteries

  • Shengyu Jing,
  • Xu Gong,
  • Shan Ji,
  • Linhui Jia,
  • Bruno G. Pollet,
  • Sheng Yan and
  • Huagen Liang

Beilstein J. Nanotechnol. 2020, 11, 1809–1821, doi:10.3762/bjnano.11.163

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  • [26]. For instance, molybdenum/tungsten carbide with a well-defined nanostructure was synthesized via a hydrothermal method, and the obtained metal carbide catalyst yielded a high capacity in lithium–oxygen batteries [15]. Also, titanium carbide was synthesized by Bruce et al. as cathode material for
  • the previous literatures [40][41][42]. However, a hydrothermal process was introduced here as a new treatment step prior to the precursor calcination in order to modify the properties of the prepared electrode materials. Heterostructured NiCx-NiFe-NC derived from bimetallic Prussian blue supported on
  • structure. As shown in the inset of Figure 2d, the main diffraction peaks of the Ni–Fe PBA precursor are consistent with the standard patterns of Ni3[Fe(CN)6]2 (JCPDS: 51-1897). During a hydrothermal pretreatment, the ion-exchange reaction of OH−/[Fe(CN)6]3− occurred at the interface between NiFe-PBA cubes
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Published 02 Dec 2020

A self-powered, flexible ultra-thin Si/ZnO nanowire photodetector as full-spectrum optical sensor and pyroelectric nanogenerator

  • Liang Chen,
  • Jianqi Dong,
  • Miao He and
  • Xingfu Wang

Beilstein J. Nanotechnol. 2020, 11, 1623–1630, doi:10.3762/bjnano.11.145

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  • deposited onto 45 μm p-Si by radio frequency (RF) magnetron sputtering. Next, the sample was placed into a solution of 0.877 g hexamethylenetetramine, 1.372 g Zn(CH3COO)2, and 13 mL ammonium hydroxide to grow ZnO NWs for half an hour via a hydrothermal method in a mechanical convection oven at 90 °C
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Published 27 Oct 2020

High-responsivity hybrid α-Ag2S/Si photodetector prepared by pulsed laser ablation in liquid

  • Raid A. Ismail,
  • Hanan A. Rawdhan and
  • Duha S. Ahmed

Beilstein J. Nanotechnol. 2020, 11, 1596–1607, doi:10.3762/bjnano.11.142

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  • hydrothermal methods, chemical bath deposition, laser ablation in liquid reverse microemulsion, electrospinning, sol–gel, electrochemical method, template method, sonochemical method, and hydrochemical bath deposition [10][11][12][13]. The size of Ag2S NPs depends on the preparation conditions [14]. Ag2S NPs
  • bromide (CTAB) surfactant-assisted hydrothermal method [15]. Zhang et al. synthesized monodisperse Ag2S NPs using thermolysis of harmless silver xanthates as a single-source molecular precursor and controlled the particle size by changing the alkyl chain length in the precursors [16]. Recently, Kang et al
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Published 21 Oct 2020

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

  • Matías Guerrero Correa,
  • Fernanda B. Martínez,
  • Cristian Patiño Vidal,
  • Camilo Streitt,
  • Juan Escrig and
  • Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

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  • , chemical vapor deposition, electrochemical anodization method, hydrolysis, hydrothermal method, precipitation–hydrothermal method, reverse micellar route, sol–gel method, solution-based synthesis, solvothermal synthesis, and the sonochemical method. The most relevant ones, along with the typical resulting
  • temperature well above their boiling point, facilitating the interaction of the precursors during synthesis. Some examples are Y2O3 [58] and ZnO [59] nanoparticles with different morphologies and sizes. When water is used as the solvent, the method is called the hydrothermal technique, which is an easy and
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Published 25 Sep 2020

One-step synthesis of carbon-supported electrocatalysts

  • Sebastian Tigges,
  • Nicolas Wöhrl,
  • Ivan Radev,
  • Ulrich Hagemann,
  • Markus Heidelmann,
  • Thai Binh Nguyen,
  • Stanislav Gorelkov,
  • Stephan Schulz and
  • Axel Lorke

Beilstein J. Nanotechnol. 2020, 11, 1419–1431, doi:10.3762/bjnano.11.126

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  • as solvothermal and hydrothermal synthesis [9]. In these processes, long ultrasonication as well as reduction/heating procedures are required [6][10], both of which will impede industrial production. In contrast, physical approaches for the synthesis of electrocatalysts (such as plasma-assisted
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Published 17 Sep 2020

Magnetic-field-assisted synthesis of anisotropic iron oxide particles: Effect of pH

  • Andrey V. Shibaev,
  • Petr V. Shvets,
  • Darya E. Kessel,
  • Roman A. Kamyshinsky,
  • Anton S. Orekhov,
  • Sergey S. Abramchuk,
  • Alexei R. Khokhlov and
  • Olga E. Philippova

Beilstein J. Nanotechnol. 2020, 11, 1230–1241, doi:10.3762/bjnano.11.107

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  • ][30][31][32], solvothermal [33] and hydrothermal [34] reactions, the polyol method [35], dehydration or reduction of precursor rod-like particles [8][11], sonochemical oxidation [36], thermal decomposition [23][26], sol–gel reactions [37], synthesis in worm-like surfactant micellar solutions [38][39
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Published 17 Aug 2020

Gas sorption porosimetry for the evaluation of hard carbons as anodes for Li- and Na-ion batteries

  • Yuko Matsukawa,
  • Fabian Linsenmann,
  • Maximilian A. Plass,
  • George Hasegawa,
  • Katsuro Hayashi and
  • Tim-Patrick Fellinger

Beilstein J. Nanotechnol. 2020, 11, 1217–1229, doi:10.3762/bjnano.11.106

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  • originating from adsorption inside micropores. Herein, two different types of HCs prepared with different procedures are compared regarding their morphological characteristics as well as their electrochemical properties. Six samples were prepared via hydrothermal carbonization (HT) followed by pyrolytic
  • the hydrothermal carbonization of saccharides [30][31]. Despite the slightly different preparation protocols, morphological differences between the hydrothermally obtained HCs are not significant (Figure 1). The two RF carbon samples showed well-defined monolithic macrostructures obtained by spinodal
  • by the secondary catalytic effect of borax during the hydrothermal carbonization of sugars [32]. Gas sorption porosimetry of hard carbons N2 sorption porosimetry of the HT samples turned out to be problematic, since the equilibrium conditions were not reached (exemplarily shown in Supporting
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Published 14 Aug 2020

Influence of the magnetic nanoparticle coating on the magnetic relaxation time

  • Mihaela Osaci and
  • Matteo Cacciola

Beilstein J. Nanotechnol. 2020, 11, 1207–1216, doi:10.3762/bjnano.11.105

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  • additional step in which the hydrothermal method or thermal decomposition technique are used. The method used to obtain nanoparticles by thermal decomposition of an iron precursor in the presence of NaBH4 in a polyol was found to be suitable for size control in both chemical approaches [1][2][3][4][6]. Since
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Published 12 Aug 2020

High permittivity, breakdown strength, and energy storage density of polythiophene-encapsulated BaTiO3 nanoparticles

  • Adnanullah Khan,
  • Amir Habib and
  • Adeel Afzal

Beilstein J. Nanotechnol. 2020, 11, 1190–1197, doi:10.3762/bjnano.11.103

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  • dioxide (TiO2 Tronox, 99.5%, Tronox Pigments GmbH) are used as Ba and Ti precursors for the hydrothermal synthesis of BTO nanoparticles. Ba(OH)2·8H2O also acts as the mineralizer and prevents the use of NaOH or KOH for controlling the pH value of the reaction mixture [12]. Equimolar amounts of Ba and Ti
  • precursors are added to the double-distilled water in a PTFE-lined pressure vessel. The hydrothermal reaction is carried out in an autoclave (Berghof Instruments GmbH) at 120 °C and autogenous pressure for 24 h under stirring. The product is washed with dilute formic acid solution and double-distilled water
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Published 10 Aug 2020

Gram-scale synthesis of splat-shaped Ag–TiO2 nanocomposites for enhanced antimicrobial properties

  • Mohammad Jaber,
  • Asim Mushtaq,
  • Kebiao Zhang,
  • Jindan Wu,
  • Dandan Luo,
  • Zihan Yi,
  • M. Zubair Iqbal and
  • Xiangdong Kong

Beilstein J. Nanotechnol. 2020, 11, 1119–1125, doi:10.3762/bjnano.11.96

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  • , magnetron sputtering, molecular precursor techniques and photo-deposition techniques have been applied to the preparation of nanocomposites [6][21][22]. However, these techniques are very sophisticated and not optimized for synthesis on a large scale. Herein, a simple hydrothermal process was employed to
  • activity of the as-prepared nanocomposites was investigated against Gram-positive S. aureus and Gram-negative E. coli. Experimental Synthesis of the Ag–TiO2 nanocomposite A hydrothermal method was used to prepare the Ag–TiO2 nanocomposite on a gram-scale. 1.25 mol/L of a 16.0 mL titanium sulfate solution
  • addition to Ag and TiO2, indicating that the formation of the Ag–TiO2 nanocomposite was comparable to previously reported studies. The synthesis of the TiO2 and Ag–TiO2 nanocomposites using the polyvinylpyrrolidone (PVP)-assisted hydrothermal method is illustrated in Scheme 1. In the growth process, the
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Published 29 Jul 2020

Gas-sensing features of nanostructured tellurium thin films

  • Dumitru Tsiulyanu

Beilstein J. Nanotechnol. 2020, 11, 1010–1018, doi:10.3762/bjnano.11.85

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  • grow Te nanoflakes. In order to synthesize Te nanowires, Liang and collaborators [13] performed chemical reactions of Na2TeO3, in aqueous solution, via hydrothermal treatment, whereas Ma and colleagues [14] used a solvothermal approach on glass substrates. To synthesize Te nanotubes, techniques such as
  • hydrothermal recrystallization [23]. The response time range of NH3 gas sensors based on such nanocomponents was 5–18 s but the recovery time ranged between 170–720 s. From comparison with state-of-the-art devices, it can be observed that the physically nanostructured Te thin films exhibit great potential for
  • applications in development in advanced gas sensors and, so far, are the only Te-based nanostructured sensors tested with this purpose. Besides, it can also be observed that nanostructuring is mostly performed via phase transformations, such as hydrothermal recrystallization and growth of Te nanocrystals
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Published 10 Jul 2020

Band tail state related photoluminescence and photoresponse of ZnMgO solid solution nanostructured films

  • Vadim Morari,
  • Aida Pantazi,
  • Nicolai Curmei,
  • Vitalie Postolache,
  • Emil V. Rusu,
  • Marius Enachescu,
  • Ion M. Tiginyanu and
  • Veaceslav V. Ursaki

Beilstein J. Nanotechnol. 2020, 11, 899–910, doi:10.3762/bjnano.11.75

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  • (MOCVD) [18][19], hydrothermal [4], chemical bath deposition (CBD) [20], sol–gel spin coating [21][22][23][24][25][26][27][28][29], and spray pyrolysis [28][29][30][31][32][33][34]. Among these techniques, the sol–gel spin coating method has the advantage of ensuring easy control and handling of
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Published 12 Jun 2020

Effect of Ag loading position on the photocatalytic performance of TiO2 nanocolumn arrays

  • Jinghan Xu,
  • Yanqi Liu and
  • Yan Zhao

Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59

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  • preparation of 1D TiO2 nanostructures is mainly performed by using anodization [17], hydrothermal [18] and template [19] methods. Meanwhile, the most common methods for the combination with precious metals are chemical deposition [20] and physical deposition [21]. The development of anodized aluminum oxide
  • of the 1D TiO2–Ag nanostructures prepared to date are Ag-nanoparticle-coated TiO2 (ACT), in which the catalytic efficiency of the catalyst is greatly decreased when the Ag loading is increased to a certain extent. Wang et al. [29] used the hydrothermal method to prepare an array of TiO2 nanocolumns
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Published 05 May 2020

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

  • Wei Fang,
  • Liang Yu and
  • Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50

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  • environmental monitoring, industry, aviation, and transportation. In this paper, heterostructured CuO–ZnO-loaded CNF membranes (CNFMs) were prepared successfully by a combination of electrospinning, heat treatment, and hydrothermal synthesis. The influence of the synthesis parameters on morphology, structure
  • three times, and the degradation rate remained above 90%. Keywords: electrospinning; composite nanofibers; heterostructured CuO–ZnO; hydrothermal synthesis; photocatalysis; semiconductor oxide; Introduction Water remediation is one of the main scientific research subjects regarding environmental
  • work [37], bubble-electrospinning was used to prepare Cu(Ac)2/Zn(Ac)2/PVDF/PAN on a large scale. Subsequently, PVDF/PAN CNFMs loaded with CuO and ZnO nanocrystals were prepared using heat treatment and hydrothermal synthesis. However, the diameter distribution of CNFMs obtained by bubble
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Published 15 Apr 2020

Soybean-derived blue photoluminescent carbon dots

  • Shanshan Wang,
  • Wei Sun,
  • Dong-sheng Yang and
  • Fuqian Yang

Beilstein J. Nanotechnol. 2020, 11, 606–619, doi:10.3762/bjnano.11.48

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  • residuals to synthesize carbon nanoparticles by hydrothermal carbonization (HTC), annealing at high temperature, and laser ablation (LA) in a NH4OH solution. The carbon nanoparticles synthesized with the HTC process (HTC-CDs) exhibit photoluminescent characteristics with strong blue emission. The annealing
  • to introduce N-surface-functional groups to carbon nanoparticles made from biomass and biowaste and to produce stable photoluminescent CDs with excellent water-wettability. Keywords: biomass; carbon dots; hydrothermal process; laser ablation; N-doping; photoluminescence; Introduction Carbon-based
  • synthesizing CDs, including oxidation and reduction [13][14][15], laser ablation [16], microwave irradiation [9], pyrolysis [17], and hydrothermal treatment [18]. Some of these methods are tedious and time consuming and use strong acids and/or surface treatment to improve their water solubility and
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Published 09 Apr 2020

Identification of physicochemical properties that modulate nanoparticle aggregation in blood

  • Ludovica Soddu,
  • Duong N. Trinh,
  • Eimear Dunne,
  • Dermot Kenny,
  • Giorgia Bernardini,
  • Ida Kokalari,
  • Arianna Marucco,
  • Marco P. Monopoli and
  • Ivana Fenoglio

Beilstein J. Nanotechnol. 2020, 11, 550–567, doi:10.3762/bjnano.11.44

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  • (CNPs) were produced starting from glucose using a one-step hydrothermal process as previously described by Kokalari et al. 2019 [24]. Briefly, glucose was dissolved in 50 mL of ultrapure water followed by the addition of 15 mg of sodium polyacrilate. The solution was introduced in a pressure reactor
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Published 03 Apr 2020

Synthesis and enhanced photocatalytic performance of 0D/2D CuO/tourmaline composite photocatalysts

  • Changqiang Yu,
  • Min Wen,
  • Zhen Tong,
  • Shuhua Li,
  • Yanhong Yin,
  • Xianbin Liu,
  • Yesheng Li,
  • Tongxiang Liang,
  • Ziping Wu and
  • Dionysios D. Dionysiou

Beilstein J. Nanotechnol. 2020, 11, 407–416, doi:10.3762/bjnano.11.31

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  • nontoxic products. In this work, a CuO/tourmaline composite with zero-dimensional/two-dimensional (0D/2D) CuO architecture was successfully obtained via a facile hydrothermal process, and its photocatalytic activity was evaluated by the degradation of methylene blue (MB). Surface element valence state and
  • functional mineral material for accepting the photogenerated e− due to its special electric field. Herein, we report the successful synthesis of the CuO/tourmaline composite photocatalyst with 0D/2D CuO geometric structure by a facile precipitation–hydrothermal process. This work firstly highlights a simple
  • ., China. Photocatalyst synthesis A hydrothermal process was employed to synthesize the CuO/tourmaline composite. In detail, 0.50 g of the tourmaline powder and 40 mL of distilled water were added into a beaker followed by 20 min of magnetic stirring, and the obtained suspension was sonicated for 20 min to
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Published 02 Mar 2020

Formation of nanoripples on ZnO flat substrates and nanorods by gas cluster ion bombardment

  • Xiaomei Zeng,
  • Vasiliy Pelenovich,
  • Bin Xing,
  • Rakhim Rakhimov,
  • Wenbin Zuo,
  • Alexander Tolstogouzov,
  • Chuansheng Liu,
  • Dejun Fu and
  • Xiangheng Xiao

Beilstein J. Nanotechnol. 2020, 11, 383–390, doi:10.3762/bjnano.11.29

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  • ., Ltd.) by means of a two-step hydrothermal (HT) growth process. The first step is the synthesis of a seed layer and the second step is the ZnO nanorod growth. To prepare the seed layer solution we stirred 5 mM Zn(CH3COO)2·2H2O (zinc acetate dehydrate, 99.9%, Sinopharm Chemical Reagent Co., Ltd) in 10
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Published 24 Feb 2020

Facile biogenic fabrication of hydroxyapatite nanorods using cuttlefish bone and their bactericidal and biocompatibility study

  • Satheeshkumar Balu,
  • Manisha Vidyavathy Sundaradoss,
  • Swetha Andra and
  • Jaison Jeevanandam

Beilstein J. Nanotechnol. 2020, 11, 285–295, doi:10.3762/bjnano.11.21

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  • literature that synthetic and conventional Hap has been prepared by various chemical procedures such as hydrothermal, sol–gel, mechanochemical, reverse microemulsion and precipitation methods, and the resulting material has been proposed to be highly beneficial in hard tissue treatments [3][4][5]. However
  • loading capacity and slow drug release in drug delivery systems for progressive advancement in osteoporosis and bone tumor treatments [17]. Various studies have reported the synthesis procedure of Hap nanoparticles from annealed cuttlefish bone using a hydrothermal method, which yields calcium oxide (CaO
  • ), and analyzed their physical and biological properties [18][19][20]. However, the hydrothermal method requires expensive autoclaves to maintain high temperature and pressure and uses toxic chemicals to yield different morphologies of Hap, especially nanorods [21]. These Hap nanorods possess enhanced
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Published 04 Feb 2020

High-performance asymmetric supercapacitor made of NiMoO4 nanorods@Co3O4 on a cellulose-based carbon aerogel

  • Meixia Wang,
  • Jing Zhang,
  • Xibin Yi,
  • Benxue Liu,
  • Xinfu Zhao and
  • Xiaochan Liu

Beilstein J. Nanotechnol. 2020, 11, 240–251, doi:10.3762/bjnano.11.18

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  • new nanoporous material comprising NiMoO4 nanorods and Co3O4 nanoparticles derived from ZIF-67 supported by a cellulose-based carbon aerogel (CA) has been successfully synthesized using a two-step hydrothermal method. Due to its chemical composition, the large specific surface and the hierarchical
  • , which exhibited a capacitance of 3.6 F/cm2 at 3 mA/cm2, a capacitance retention of 82% and an increase of the current density from 3 to 15 mA/cm2 [21]. Cai et al. reported a facile two-step hydrothermal method to synthesize unique 3D Co3O4/NiMoO4 core/shell nanowire arrays on Ni foam, and the resulting
  • aerogel precursor, which was produced from microcrystalline cellulose (MC). Second, the produced CA was used as the backbone for the growth of NiMoO4 nanorods employing a hydrothermal method followed by heat treatment. By this approach, NiMoO4/CA composites were obtained, in which the NiMoO4 nanorods
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Published 21 Jan 2020
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