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1

Synthesis and mechanism of aluminum silicate mesoporous materials by F108 template

Ma Zhijun, Gao Jing, Weng Xingyuan, Yang Shuai, Peng Kai

Materials Science Poland

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2020

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Vol. 38, No. 4

566-576

EN

Aluminosilicate mesoporous materials were synthesized using F108 template (polyethylene glycol-polypropylene glycol-polyethylene glycol) at a concentration of 0.034 g/ml and the molar ratio of Al2O3 to SiO2 was 0.09. The products were then characterized using nitrogen adsorption/desorption tests, scanning electron microscopy (SEM), and X-ray diffraction (XRD). The effects of various crystallization temperatures as well as sodium hydroxide concentrations on the average diameter, pore volume, surface area, and morphology of the synthetic material were analyzed. Results showed that a sodium hydroxide concentration of 11 mol/L and a crystallization temperature of 130 °C produced a synthetic material with regular pore size and homogeneous arrangement including a specific surface area of 137.62 m2/g, an average pore volume of 0.27 cm3/g, along with an average pore size of 15.33 nm.

2

Dekoracja ceramiczna w przestrzeni industrialnej – dawny browar „Brauerei Pfeifferhof Carl Scholtz” we Wrocławiu (1895-1910)

Łukaszewicz-Jędrzejewska E.

Szkło i Ceramika

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2017

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R. 68, nr 1

19--22

PL

Dawny Browar Scholtza we Wrocławiu, powstały w latach 1893–95, jest przykładem dużego zespołu industrialnego zlokalizowanego na obrzeżu miasta. Jego cechą charakterystyczną jest nawiązanie w układzie przestrzennym, architekturze i dekoracji ceramicznej do wizerunku wielkomiejskich budowli użyteczności publicznej – szkół i szpitali, a także do typowej dla Wrocławia estetyki ceglanej ściany ze szkliwionym detalem architektonicznym, promowanej przez architekta miejskiego Richarda Plüddemanna (1885–1910). Browar jest przykładem obiektu przemysłowego trzeciego ćwierćwiecza XIX w., w którym harmonia funkcji i formy ma także wymiar estetyczny. W artykule omówiono dekorację elewacji budynków zespołu browaru w kontekście nowych technologii produkcji kształtek i pustaków ceramicznych oraz zaprezentowano wybór wzorników dla detalu ceglanego z lat 1864–1900. Poruszono także kontekst dokumentacji i funkcjonowania technofaktu w środowisku kulturowym.

EN

The former Scholtz brewery building in Wroclaw, constructed around 1893–1895, is an example of a large industrial complex located on the outskirts of the city. The characteristic feature of this building is the spatial layout, architecture and ceramics decorations, which tend to imitate public utility buildings - schools and hospitals, as well as the aesthetics of a brick wall with colorful glazes detail, promoted by the city architect Richard Plüddemann (1885–1910). The Brewery is a typical example of an industrial facility build during the third quater of 19th century, in which the harmony of form and function also has an aesthetic dimension. The article discusses the decorations of facades of the brewery in the context of new technologies in the production of fittings and ceramic blocks, as well as presents a selection of templates for brick details between 1864–1900. The aspect of documentation and functioning of the “aesthetics of industry boulding” in the cultural environment, has also been discused.

3

Analysis of the Inhomogeneity of an Electrospun Mat Produced Using Static and Dynamic Collectors of Different Template Design, Including its Mitigation

Pathalamuthu P., Shahana S. T., Nivedha U., Siddharthan A., Giridev V. R.

Fibres & Textiles in Eastern Europe

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2017

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Vol. 25, no. 3 (123)

53--61

EN

In an electrospinning process, as the deposition of fibres occurs randomly over the collector, the mats produced are generally expected to have homogeneous properties throughout the mat. This study compares the ultimate tensile strength, porosity, thickness and morphology of the different portions of mats sectioned at various angular locations. The influence of the template design and mode of operation of the collectors on the properties of electrospun mats were investigated. The inhomogeneity in the properties of the electrospun mat produced using stationary collectors was significant, irrespective of the different template design of the collectors. However, the collectors operated in the dynamic mode decrease variations in the properties among the different sections of the electrospun mats. By choosing a particular template design and mode of operation of the collector, an electrospun mat of desired orientation can be achieved.

PL

W pracy porównano wytrzymałość na rozciąganie, porowatość, grubość i morfologię różnych fragmentów włóknin wytworzonych przy użyciu kolektorów statycznych i dynamicznych. Zbadano wpływ sposobu działania kolektorów na właściwości otrzymanych włóknin. Zaobserwowano znaczącą niejednorodność właściwości włóknin wytworzonych przy użyciu kolektorów statycznych. Stwierdzono, że kolektory pracujące w trybie dynamicznym zmniejszają odchylenia właściwości pomiędzy różnymi sekcjami włóknin. Poprzez wybranie odpowiedniego sposobu działania kolektora, można uzyskać włókninę o pożądanej orientacji.

4

Synthesis of polyaniline nanotubes through UV light catalytic method

Sun C., Wang Y.

Materials Science Poland

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2015

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Vol. 33, No. 1

193--197

EN

In this study, nitrocellulose (NC) fiber blanket prepared by electrostatic spinning method has been used as a template, and copper nitrate (Cu(NO3)2)) as an oxidant to synthesise polyaniline nanotubes doped with heteropolyacid (H4)SiW12)O40), SiW12) using UV light catalytic method. Infrared spectroscopy (IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) technologies were applied to characterize the prepared samples of polyaniline nanotubes. The results show that the external diameter of the tube is about 200 nm, and the internal diameter about 170 nm. We also give a reasonable speculation and explanation about the formation mechanism of the nanotubes.

5

Catalyst free growth of single-crystalline bismuth nanorods by closed space sublimation technique

Usman W., Maqsood A.

Materials Science Poland

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2015

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Vol. 33, No. 2

381--390

EN

In the present study, bismuth (Bi) thin films having thickness of 335 nm have been deposited onto a glass substrate by closed space sublimation (CSS) technique. Besides this, spontaneous growth of Bi nanorods has also been investigated for the first time, without template and catalyst assistance in a substrate temperature range of 380 to 430 degrees C using CSS technique. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to investigate microstructure, morphology and roughness of the Bi nanorods. The diameter and length ranges of Bi nanorods were 80 to 400 nm and 3 to 5 mu m, respectively. Moreover, they exhibited a rhombohedral structure with a dominant peak indexed at (012), (104), and (110). The mass percentage of Bi, determined by energy dispersive X-ray (EDX), was 99.93 %. The studies of electrical resistivity, Hall coefficient, magnetoresistivity, hole mobility and carrier concentration of Bi thin films were performed at 300 to 350 K and the electrical properties were found to be a function of temperature. The basic aim was to investigate the spectacular evolution of Bi nanostructures on as-deposited thin films and effects of thickness on their structural, electrical and dielectric properties. Detailed examination of SEM micrographs eliminated all other growth modes except self-catalytic tip growth by Vapor-Solid (VS) growth process which is believed to provide the driving force for spontaneous nanorod growth at high substrate temperature. Deposition of thinner Bi films provided a new possibility for fabrication of Bi nanorods of high quality.

6

Nanoporowata struktura tlenku aluminium w anodyzacji jedno i dwuetapowej

Juchim S.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 7

155--157

PL

W artykule porównano parametry fizyczne nanoporowatej matrycy z tlenku aluminium wykonanej w technice dwuetapowej, z parametrami podobnej matrycy uzyskanej w uproszczonej technologii jednoetapowej. Analizie poddano przebieg zmian parametrów elektrycznych obwodu anodyzacji w obu technologiach a także przeprowadzono obrazowanie powierzchni za pomocą mikroskopu typu FE-SEM.

EN

In the paper is presented a comparison of physical parameters of alumina template made by use of one (simplified) and two-step anodisation. The analyze was taken on the electrical parameters of anodisation circuits of both of the technologies and the visualization of surface was carried on by means of FE-SEM microscope.

7

The concept of application for intelligent building management on a "SaaS" platform

Petvaldsky P., Bilik P.

Zeszyty Naukowe. Elektryka / Politechnika Opolska

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2012

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z. 68

91--98

EN

The new concept of software systems Solutions based on Web services is becoming more popular in information technology. The concept of „SaaS“ provides cost savings and eliminatcs the need tor installation and operation of software on the user side. Especially for end-users this concept brings significant benefits. In engincering software applications it offers the possibility to use this conccpt for widc layer of users. One industry that is undergo- ing a dynamie expansion is the area of building management systems. Implementation of applications based on a "SaaS" can bring distinct advantagcs against common software Solutions.

8

Soft chemical synthesis of nanosized zinc aluminate spinel from the thermolysis of different organic precursors

Kuttypv M., Dasgupta S., Bandyopadhyay S.

Materials Science Poland

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2011

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Vol. 29, No. 2

121--126

EN

A new method of preparation of nanocrystalline zinc aluminate (ZnAl2O4) powder is described in this paper. Different organic acids are used as template material and nitric acid as an oxidant. Single phase ZnAl2O4 spinel can be formed at a much lower temperature through this route which gives nanocrystalline powder with uniform particle size and morphology. The powders are characterized by thermo gravimetric analysis (TGA), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FT-IR), BET surface area analysis and field emission scanning electron microscopy (FE-SEM). The average crystallite size of the single phase material was of 20 to 30 nm and the surface area was found to be 21 to 27 m2g-1.

9

Probabilistic Issues in Biometric Template Design

Pacut A.

Journal of Telecommunications and Information Technology

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2010

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nr 4

75-85

EN

Since the notion of biometric template is not well defined, various concepts are used in biometrics practice. In this paper we present a systematic view on a family of template concepts based on the L1 or L2 dissimilarities. In particular, for sample vectors of independent components we find out how likely it is for the median code to be a sample vector.

10

Template Assisted Growth of Molybdenum Oxide Nanocrystals Through Hydrothermal Process

Farzaneh F., Najafi M.

Polish Journal of Chemistry

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2009

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Vol. 83, nr 9

1523-1528

EN

Rod shaped MoO3 nanocrystals were prepared from ammonium heptamolybdate tetra - hydrate (AHM) and ethylene diamine (en) as template agent in water via a hydrothermal process at 180 graduate C. The prepared nanocrystals were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The range size of nanorods are from a few nanometers (nm) to micrometers in length and 50 to 200 nm in diameter. It was also found that nanostructures of varied dimensionality such as plates and helical plates are formed using citric acid (CA), and starch as template respectively.

11

Macrocycles in Supramolecular Chemistry: from Dynamic Combinatorial Chemistry to Catalysis

Lüning U.

Polish Journal of Chemistry

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2008

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Vol. 82, nr 6

1161-1174

EN

Macrocycles can be synthesized under kinetic or thermodynamic control, the latter leading to mixtures in equilibrium. Their composition can be controlled by addition of templates. Alkaline earth metal ions have been used to synthesize imine macrocycles of different sizes from dialdehydes and diamines specifically. In addition, the competition between the formation of a macrocycle or a bimacrocyclic cage compound can be controlled by a proper template ion. Also organic templates such as polyols can be used to stabilize a resulting macrocycle. As recognition reaction, the formation of boronic esters is presented, the macrocyclization was achieved by ring-closing metathesis. Due to the templates, endo-functionalized macrocycles are achieved, such as concave acids or bases, metal ion complexes and even N-heterocyclic carbenes. All of these can be part of a concave structure which determines their reactivity and selectivity in reactions such as acid/base catalysis, metallo-or-organocatalysis.