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New boron selective sorbents for sorption – membrane hybrid system

Dach Barbara, Bryjak Marek, Bryjak Jolanta, Łużny Rafał

Polimery

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2022

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Vol. 67, nr 4

158--161

EN

The synthesis and properties of core-shell sorbents dedicated to the removal of borates from aqueous solutions were described. By modification of polymer matrices with vinylbenzyl chloride followed by its derivatization with N-methyl glucamine a new kind of sorbents were obtained. The testing of boron sorption reviled that the process efficiency was related to the pore diameter and the content of ligand in the sorbent. The best material for use in a hybrid system, where boron is absorbed by fine particles and removed in microfiltration, was Poropak Q with a specific surface area of 300 m2/g.

PL

Opisano syntezę i właściwości sorbentów typu rdzeń-otoczka przeznaczonych do usuwania boranów z roztworów wodnych. Poprzez modyfikację matryc polimerowych chlorkiem winylobenzylu, a następnie ich derywatyzację za pomocą N-metyloglukaminy otrzymano nowy rodzaj sorbentów. Badania sorpcji boru wykazały zależność wydajności procesu od średnicy porów i zawartości ligandu w sorbencie. Najlepszym materiałem do zastosowania w systemie hybrydowym, w którym bor jest absorbowany przez drobne cząstki i usuwany w procesie mikrofiltracji, okazał się Poropak Q o powierzchni właściwej 300 m2/g.

2

Synthesis and characterization of double phase metal nickelates/borates

Çelik Gül G., Kurtuluş F.

Journal of Achievements in Materials and Manufacturing Engineering

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2016

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Vol. 76, nr 1

5--8

EN

Purpose: Purpose of this research is obtaining of metal nickelates and borates as double phase. These types of compounds display extraordinary structural diversity caused by boron and nickel which applicable in flame retardant, detergent, ceramic and such industries. Design/methodology/approach: Double phase metal nickelates and borates were weighed in an appropriate molar ratio and homogenized in an agate mortar. The mixture placed into a porcelain crucible to heat in conventional high temperature furnace. After the material was exposed to heat treatment at 900°C for 4 hours, and cooled down to room temperature with many grindings. Then, final products were analyzed by powder X-ray Diffractometer (XRD) using PANanalytical X’ Pert PRO Diffractometer (XRD) with Cu Kα (1.5406 Å, 45 kV and 30 mA) radiation. Fourier transform infrared spectroscopy (FTIR) was achieved on a Perkin Elmer Spectrum 100 FTIR Spectrometer from 4000 to 650 cm-1. Scanning electron microscopy was achieved in SEM JEOL 6390-LV. Luminescence properties were performed by Andor Solis Sr 500i spectrophotometer. Conventional solid state syntheses were done in Protherm furnace. Findings: Ni3B2O6/YBO3 and MoNiO4/Ni3B2O6 compounds as double phase were identified by powder XRD patterns and phase analysis of these compounds were completed by High Score Plus program. Vibrations of B-O and Ni-O bonds of functional groups were determined in FTIR spectrum benefiting from literature. Research limitations/implications: Implication of the synthesis method has some disadvantages such as low homogeneity, non-uniform product etc. We tried to minimize these negative aspects in our research and succeeded. Practical implications: Double phase Ni3B2O6/YBO3 and MoNiO4/Ni3B2O6 compounds were synthesized by high temperature solid state synthesis route. Structural properties and phase composition analysis were realized using powder X-ray diffraction patterns. Originality/value: Value of the paper is first time conventional synthesis of double phase Ni3B2O6/YBO3 and MoNiO4/Ni3B2O6 compounds, characterization of the structures, and investigation of morphological and luminescent properties.

3

Control of optical active borates nanocrystals agglomeration

Cieślik I., Węgłowski R., Żmija J., Kurzydłowski K., Płocińska M., Oćwieja M.

Journal of Achievements in Materials and Manufacturing Engineering

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2013

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Vol. 61, nr 2

163--168

EN

Purpose: The purposes of this study explore the possibility of total control the agglomeration of nanoborates powders. The great potential of PDLCs can be enhanced by using dye-doped or nanoparticles-doped materials, such as borates [1]. It is important to know how to prepare nanoparticles in order to obtain a high level of dispersion in the composites. Otherwise, even small an agglomeration does not give a possibility on the appropriate characteristic of properties and interpretation of the results. The deagglomeration methods applied until now give the decrease of agglomeration to a lesser extent than our method. Characteristic size and shape of particles made with sol-gel process is difficult to perform. Design/methodology/approach: Nanopowders samples of YAB and LCBO were prepared with sol-gel method. Deagglomeration process was carried out using acetic acid. The morphology and size of nanopowders were investigated by scanning electron microscopy (SEM). The crystallite sizes were determinated with IPS UA method. Findings: It was confirmed that the acetic acid influence on the decrease of agglomeration. It was also determined of conditions for preparation borates nanopowders samples (concentration acetic acind time and temperature of drying prepared samples). We have proved that a reagent used for deagglomeration process does not affect the structure of the investigated nanoborates used in an experimental. Research limitations/implications: The results can be used to the prepared of nanocompades of borates to observe a morphology and reliable assessment of nanocrystalline size. Originality/value: Our study shows how to prepare a sample of particles to observe morphology and measure the size of nanograins. In our study we found excellent solution, the medium, which not influence the inorganic nanomaterial structure. Result seems to be excellent and very perspective. We have showed as that measurement type influence the results of particles size.