Synthesis of highly active ETS-10-based titanosilicate for heterogeneously catalyzed transesterification of triglycerides

• Muhammad A. Zaheer,
• David Poppitz,
• Khavar Feyzullayeva,
• Marianne Wenzel,
• Jörg Matysik,
• Radomir Ljupkovic,
• Aleksandra Zarubica,
• Alexander A. Karavaev,
• Andreas Pöppl,
• Roger Gläser and
• Muslim Dvoyashkin

Beilstein J. Nanotechnol. 2019, 10, 2039–2061, doi:10.3762/bjnano.10.200

• (DRIFT) study in [31]. After calcination, the peak below 600 K slightly increases and becomes broad. The high-temperature range for all three titanosilicates is characterized by notable desorption from the strong Brønsted basic sites. For Na,K-ETS-10, these are the oxygen atoms shared between Si and Ti

• to the expected surface dehydroxylation resulting from the high-temperature treatment. The obtained surface basic site density and corresponding intrinsic adsorption capacity are presented in Table 2. Surface characterization of the ETS-10-based titanosilicates by 29Si MAS NMR For quantitative

• -synthetic treatment to titanosilicates can change the state of titanium atoms from Ti(IV) to catalytically active Ti(III) [50]. Such a reduction to paramagnetic Ti in ETS-10 titanosilicates can occur as a result of high-temperature treatment under vacuum [51], treatment with H2 or CO at moderate to high

Nanostructured and oriented metal–organic framework films enabling extreme surface wetting properties

• Andre Mähringer,
• Julian M. Rotter and
• Dana D. Medina

Beilstein J. Nanotechnol. 2019, 10, 1994–2003, doi:10.3762/bjnano.10.196

• Information File 1). This confirms that the observed superhydrophilic and superoleophobic behavior arises from the MOF film. To illustrate the stability of the MOF under harsh conditions, the films were subjected to an acidic environment (pH 5, 12 h), a basic environment (pH 9, 12 h), high temperature (150 °C

• properties while maintaining transparency (see Figure S5.9, Supporting Information File 1). In addition, we found that these MOF films are stable in acidic (pH 5, 12 h) and basic conditions and at high temperature (150 °C, 12 h) (see Figure S8.3, Supporting Information File 1). To test the antifog properties

Processing nanoporous organic polymers in liquid amines

• Jeehye Byun,
• Damien Thirion and
• Cafer T. Yavuz

Beilstein J. Nanotechnol. 2019, 10, 1844–1850, doi:10.3762/bjnano.10.179

• granules were covered with organic layers, presumably excess EDA. The solution was transferred on a silicon wafer to analyze the morphology changes by SEM as function of the heating time. When treated at high temperature for a short period of time (ca. 1 min), the granules were combined in a heap to form a

• no drastic change in the nitrile region (2200 cm−1). Moreover, the addition of an amine on a nitrile group cannot be achieved in a few seconds without catalyst despite the high temperature. The existence of carbonyl units at around 1700 cm−1 in COP-100 drew our attention. The carbonyl groups could

• the hydrophobic nanoporous polymer at high temperature [27]. The COP-100-Film was formed much slower when the temperature was below 80 °C, supporting that the amide formation by the condensation reaction was crucial for processing the nanoporous polymer. The quick amide formation made the COP-100

The impact of crystal size and temperature on the adsorption-induced flexibility of the Zr-based metal–organic framework DUT-98

• Simon Krause,
• Volodymyr Bon,
• Hongchu Du,
• Rafal E. Dunin-Borkowski,
• Ulrich Stoeck,
• Irena Senkovska and
• Stefan Kaskel

Beilstein J. Nanotechnol. 2019, 10, 1737–1744, doi:10.3762/bjnano.10.169

• of a high-temperature (DUT-98ht) phase was proposed. Although the structure of this phase could not be refined from PXRD and single crystal diffraction data, the obtained PXRD patterns were found to be very similar to the cp phase. In addition, DRIFT analysis indicates that the transition is

Upcycling of polyurethane waste by mechanochemistry: synthesis of N-doped porous carbon materials for supercapacitor applications

• Christina Schneidermann,
• Pascal Otto,
• Desirée Leistenschneider,
• Sven Grätz,
• Claudia Eßbach and
• Lars Borchardt

Beilstein J. Nanotechnol. 2019, 10, 1618–1627, doi:10.3762/bjnano.10.157

• to 670 m2·g−1 and to 0.27 cm3·g−1, while the nitrogen content increases to 6.3 wt % (Table 1). This observation is related to an intensified chemical activation process due to the high amount of urea and the formation of ammonia during the high-temperature treatment, leading to a higher consumption

Kelvin probe force microscopy work function characterization of transition metal oxide crystals under ongoing reduction and oxidation

• Dominik Wrana,
• Karol Cieślik,
• Wojciech Belza,
• Christian Rodenbücher,
• Krzysztof Szot and
• Franciszek Krok

Beilstein J. Nanotechnol. 2019, 10, 1596–1607, doi:10.3762/bjnano.10.155

• show the properties of a bulk-like crystalline rock-salt TiO phase, unlike previous studies on the crystallography and electronic structure of TiO, which were based on defective thin films formed on various surfaces, e.g., TiC(100) [23] or TiO2(110) [24]. γ-TiO is the high-temperature phase with a NaCl

• reached on the STO surface (below 10−20 mbar). As a result of the high-temperature reduction (1150 °C, 1 h) under such conditions, a macroscopic network of nanowires was formed. After slow cooling down to room temperature, the samples were transferred in situ to the microscope chamber of an Omicron RT STM

Materials nanoarchitectonics at two-dimensional liquid interfaces

• Katsuhiko Ariga,
• Michio Matsumoto,
• Taizo Mori and
• Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

• molecules. The one-dimensional carbon materials prepared through high-temperature carbonization of C70 crystalline assemblies showed high specific capacitances at a high current density and scan rate [243]. These nano-engineered one-dimensional carbon materials might be useful as electrode materials for

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

• Vadim B. Platonov,
• Marina N. Rumyantseva,
• Alexander S. Frolov,
• Alexey D. Yapryntsev and
• Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

• high temperatures in the range of 300–800 °C. The development of high-temperature gas sensors requires the creation of new materials that are stable under these conditions. The stability of nanostructured semiconductor oxides at high temperature can be enhanced by creating composites with highly

• an n–n heterojunction at the ZnO/SiC interface. Keywords: electrospinning; high temperature gas sensor; n–n heterojunction; ZnO/SiC nanocomposite; Introduction The risk of air pollution is growing due to the development of new technologies in the chemical, metallurgical and food industries, the use

• –800 °C. The composition of the main components of exhaust gas includes CO2, CO, SO2, H2S, NOx, CnH2n+2, and NH3. The ratio of these components depends primarily on the technology features and fuel type. High-temperature gas sensors are needed for local monitoring of pollution emissions, as well as for

Rapid thermal annealing for high-quality ITO thin films deposited by radio-frequency magnetron sputtering

• Petronela Prepelita,
• Ionel Stavarache,
• Doina Craciun,
• Florin Garoi,
• Catalin Negrila,
• Beatrice Gabriela Sbarcea and
• Valentin Craciun

Beilstein J. Nanotechnol. 2019, 10, 1511–1522, doi:10.3762/bjnano.10.149

• morphological techniques to analyze the ITO thin films, we could report improvements in film quality following the RTA treatment. These properties are clearly evidenced by XRD in Figure 2. The investigated XRD patterns for the as-deposited ITO films showed a cubic nanocrystalline structure. Due to the high

• temperature used during RTA, the films became polycrystalline. An increase of the peak intensity with the increase in film thickness to 370 nm can also be noticed (Figure 2), as well as a structural reorientation (decrease of the main peak intensity and the appearance of other peaks in the film structure

Gas sensing properties of individual SnO₂ nanowires and SnO₂ sol–gel nanocomposites

• Alexey V. Shaposhnik,
• Dmitry A. Shaposhnik,
• Sergey Yu. Turishchev,
• Olga A. Chuvenkova,
• Stanislav V. Ryabtsev,
• Alexey A. Vasiliev,
• Xavier Vilanova,
• Francisco Hernandez-Ramirez and
• Joan R. Morante

Beilstein J. Nanotechnol. 2019, 10, 1380–1390, doi:10.3762/bjnano.10.136

• reaction as Metallic tin forms on the surface nanodrops, dissolving tin dioxide and the products of the incomplete oxidation of tin (SnO, Sn2O3, Sn3O4) from the argon flow. This dissolution leads finally to the saturation of tin with tin dioxide that is stable at high temperature. After this saturation

Highly ordered mesoporous silica film nanocomposites containing gold nanoparticles for the catalytic reduction of 4-nitrophenol

• Mohamad Azani Jalani,
• Leny Yuliati,
• Siew Ling Lee and
• Hendrik O. Lintang

Beilstein J. Nanotechnol. 2019, 10, 1368–1379, doi:10.3762/bjnano.10.135

• by a calcination method at high temperature in the presence of air [1][14][15][16][17]. However, this process can also lead to structural damage due to the removal of organic components from the template at high temperature [18]. Since the high quality of mesoporous silica nanomaterials can increase

• very interesting to utilize this nanocomposite for the growth of AuNPs in the silicate nanochannels. Recently, mesoporous silica nanomaterials were not only used as a support to control the size of the AuNPs [28], but also to enhance the thermal stability after heat treatment at high temperature [29

• heating at high temperature. Figure 4a,b shows the XRD patterns of [Au3Pz3]C10TEG/silicahex in the range of 190 to 450 °C (plots (a)–(e)). In both methods, the diffraction peaks for d100 were still preserved due to good thermal stability and the well-ordered pore structure of [Au3Pz3]C10TEG/silicahex

Alloyed Pt₃M (M = Co, Ni) nanoparticles supported on S- and N-doped carbon nanotubes for the oxygen reduction reaction

• Stéphane Louisia,
• Yohann R. J. Thomas,
• Pierre Lecante,
• Marie Heitzmann,
• M. Rosa Axet,
• Pierre-André Jacques and
• Philippe Serp

Beilstein J. Nanotechnol. 2019, 10, 1251–1269, doi:10.3762/bjnano.10.125

• treatment can be used to improve the carbon corrosion resistance of the CNT. In fact, annealing at high temperature (above 1000 °C) is used to remove structural defects from the CNT in order to obtained more stable [36] and more conductive [37] structures. In the case of the N-CNTs, the thermal annealing

• (and lower LD) for the N-CNT sample, which is in accordance with the TEM observations. The N-CNTHT sample shows a decrease in the number of defects compared to N-CNT, as expected after the high temperature treatment. S-CNTs constitute an intermediate situation. The d002 inter-planar spacing results

• at a binding energy of 781.1 and 796.2 eV [95]. However, the CoN4 single atoms are usually prepared by high temperature pyrolysis, and in our case, the synthesis is conducted at room temperature. It is very unlikely that CoN4 species will be formed under these conditions. The results of the XPS

Playing with covalent triazine framework tiles for improved CO₂ adsorption properties and catalytic performance

• Giulia Tuci,
• Andree Iemhoff,
• Housseinou Ba,
• Lapo Luconi,
• Andrea Rossin,
• Vasiliki Papaefthimiou,
• Regina Palkovits,
• Jens Artz,
• Cuong Pham-Huu and
• Giuliano Giambastiani

Beilstein J. Nanotechnol. 2019, 10, 1217–1227, doi:10.3762/bjnano.10.121

• (caution: after high-temperature treatment the ampules are under pressure, which is released during opening) and the monolithic solids were ground and thoroughly washed with water and diluted HCl (0.1 M). Finally, the solids were finely ground using a laboratory ball mill (Fritsch Pulverisette 23, 5 min

Green fabrication of lanthanide-doped hydroxide-based phosphors: Y(OH)₃:Eu³⁺ nanoparticles for white light generation

• Tugrul Guner,
• Anilcan Kus,
• Mehmet Ozcan,
• Aziz Genc,
• Hasan Sahin and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 1200–1210, doi:10.3762/bjnano.10.119

• . However, they are typically produced under harsh synthesis conditions such as high temperature, high pressure, and/or by employing a large amount of solvent. In this work, a facile, water-based, rapid method has been proposed to fabricate lanthanide-doped hydroxide-based phosphors. In this sense, sub

• , numerous methods for obtaining phosphors to be used either over blue LED or UV LED have been reported. However, these materials require harsh synthesis conditions such as high temperature and high pressure, and water-free solvents, which can restrict their commercialization. In this context, several

A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water

• Binjing Hu,
• Qiang Sun,
• Chengyi Zuo,
• Yunxin Pei,
• Siwei Yang,
• Hui Zheng and
• Fangming Liu

Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115

• aqueous solutions of ZnO and CZO-4 (8 ppm) were used to measure the specific chemical compositions. Conclusion In this study, we synthesized spherical ZnO and a series of rod-like Ce/ZnO catalysts via high temperature pyrolysis to investigate their photocatalytic performance using RhB as a model pollutant

Quantitative analysis of annealing-induced instabilities of photo-leakage current and negative-bias-illumination-stress in a-InGaZnO thin-film transistors

• Dapeng Wang and
• Mamoru Furuta

Beilstein J. Nanotechnol. 2019, 10, 1125–1130, doi:10.3762/bjnano.10.112

• bulk, whereas high-temperature annealing causes a quality degradation of the adjacent interfaces. Light of short wavelengths below 460 nm induces defect generation in the forward measurement and the leakage current increases in the reverse measurement, especially for the low-temperature-annealed device

• irrespective of treatment temperature. NBIS-induced critical instability occurs in the high-temperature-annealed TFT. Keywords: metal oxide; photo-induced instabilities; photon energy; thermal annealing; thin-film transistor (TFT) device; Introduction The rapid process of industrialization and

• this work, we investigate the impact of annealing temperature on the initial electrical characteristics and photo-induced instabilities in a-IGZO TFTs. The obtained electrical parameters imply that low- and high-temperature annealing leverage the generation of defects in the active layer as well as its

Synthesis and characterization of quaternary La(Sr)S–TaS₂ misfit-layered nanotubes

• Marco Serra,
• Erumpukuthickal Ashokkumar Anumol,
• Dalit Stolovas,
• Iddo Pinkas,
• Ernesto Joselevich,
• Reshef Tenne,
• Andrey Enyashin and
• Francis Leonard Deepak

Beilstein J. Nanotechnol. 2019, 10, 1112–1124, doi:10.3762/bjnano.10.111

• ]. Typically, these nanostructures are synthesized by means of high-temperature reactions that allow the formation of different metal sulfide nanotubes [4][5]. Another type of hollow nanostructure, inorganic fullerene-like structures (IFs), is the result of bending of a 2D layer of WS2 or any other 2D material

Glucose-derived carbon materials with tailored properties as electrocatalysts for the oxygen reduction reaction

• Rafael Gomes Morais,
• Natalia Rey-Raap,
• José Luís Figueiredo and
• Manuel Fernando Ribeiro Pereira

Beilstein J. Nanotechnol. 2019, 10, 1089–1102, doi:10.3762/bjnano.10.109

• milling method is similar to that obtained by the conventional method. However, the incorporation of oxygen and nitrogen in the activated structures is lower than in carbonized samples. Activation at high temperature results in a structure with higher chemical stability and lower amount of defects in

Direct growth of few-layer graphene on AlN-based resonators for high-sensitivity gravimetric biosensors

• Jimena Olivares,
• Teona Mirea,
• Lorena Gordillo-Dagallier,
• Bruno Marco,
• José Miguel Escolano,
• Marta Clement and
• Enrique Iborra

Beilstein J. Nanotechnol. 2019, 10, 975–984, doi:10.3762/bjnano.10.98

• for on-wafer contacting. In order to verify whether the high-temperature process affected the performance of the devices, the SMRs were carefully assessed before and after the growth of the graphene layer. For in-liquid measurements, we used a fluidic system made of PMMA that includes a PDMS chamber

Rapid, ultraviolet-induced, reversibly switchable wettability of superhydrophobic/superhydrophilic surfaces

• Yunlu Pan,
• Wenting Kong,
• Bharat Bhushan and
• Xuezeng Zhao

Beilstein J. Nanotechnol. 2019, 10, 866–873, doi:10.3762/bjnano.10.87

• –CF3 groups) undergo no obvious changes either under UV illumination or high temperature exposure. The change in transmittance for selected transitions are listed in Figure 3b, which shows that the change of –OH in TiO2 is much larger than the change of –CF2- or –CF3 in PFOS. The change of –CF2- or

Synthesis of MnO₂–CuO–Fe₂O₃/CNTs catalysts: low-temperature SCR activity and formation mechanism

• Yanbing Zhang,
• Lihua Liu,
• Yingzan Chen,
• Xianglong Cheng,
• Chengjian Song,
• Mingjie Ding and
• Haipeng Zhao

Beilstein J. Nanotechnol. 2019, 10, 848–855, doi:10.3762/bjnano.10.85

• °C. A series of Cu-based [12][13] and (Mn + Fe)-based [14][15] catalysts have been applied in the SCR reaction and presented good catalytic activity. Nevertheless, the preparation procedures of the catalysts always need high-temperature calcination or high-pressure hydrothermal reactions, which are

• 165, 267 and 391 °C. These values are higher than those of Mn–Cu–FeOx/CNTs-IWIM catalyst (158, 259 and 387 °C), which means that the acid sites are stronger in 4% MnO2–CuO–Fe2O3/CNTs catalyst [11]. In addition, the number of Brønsted acid sites and Lewis acid sites at low and high temperature of the 4

On the transformation of “zincone”-like into porous ZnO thin films from sub-saturated plasma enhanced atomic layer deposition

• Alberto Perrotta,
• Julian Pilz,
• Stefan Pachmajer,
• Antonella Milella and
• Anna Maria Coclite

Beilstein J. Nanotechnol. 2019, 10, 746–759, doi:10.3762/bjnano.10.74

• absorptions have been previously reported for both low-temperature and high-temperature PE-ALD processes [51][57] and as intermediates in in situ FTIR studies [58]. The absence of IR absorption in the region of 3000–2800 cm−1 points out the complete oxidation or partial removal of the ethyl groups present in

Outstanding chain-extension effect and high UV resistance of polybutylene succinate containing amino-acid-modified layered double hydroxides

• Adam A. Marek,
• Vincent Verney,
• Christine Taviot-Gueho,
• Grazia Totaro,
• Laura Sisti,
• Annamaria Celli and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 684–695, doi:10.3762/bjnano.10.68

• (DSC) using a Perkin-Elmer DSC6 apparatus. The analyses were carried out under nitrogen, and firstly, the samples (≈10 mg) were heated from 40–150 °C at 20 °C min−1, then kept at high temperature for 2 min, and then cooled down to −60 °C at 10 °C min−1. After that, the thermal history of the samples

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

• equilibrium [25]. Despite the progress made in obtaining PNCs, in general, inert conditions, high temperature and pre-synthesized precursors are required for hot injection. In addition, RT methods were mostly carried out by mixing a polar solvent with a large amount of nonpolar solvent. Since PNCs are

Direct observation of the CVD growth of monolayer MoS₂ using in situ optical spectroscopy

• Claudia Beatriz López-Posadas,
• Yaxu Wei,
• Wanfu Shen,
• Daniel Kahr,
• Michael Hohage and
• Lidong Sun

Beilstein J. Nanotechnol. 2019, 10, 557–564, doi:10.3762/bjnano.10.57

• , the DT signal at a higher energy of 3.2 eV begins to dominate. Based on its energy position, this feature can be attributed to the absorption of MoO3 [32][33]. As a semiconductor, MoO3 shows a bandgap around 3 eV. Considering the high temperature of the substrate, we can exclude the possibility that