Ultrafine particles of bismuth(III) compounds in the phase of crosslinked polymers: Precursors for new sorbents and catalysts

Gutsanu Vasile; Cojocaru Ludmila D.; Lisă Gabriela Apreotesei; Volodina Galina

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GUTSANU, Vasile, COJOCARU, Ludmila D., LISĂ, Gabriela Apreotesei, VOLODINA, Galina. Ultrafine particles of bismuth(III) compounds in the phase of crosslinked polymers: Precursors for new sorbents and catalysts. In: Journal of Applied Polymer Science, 2010, vol. 118, pp. 2674-2681. ISSN 0021-8995. DOI: https://doi.org/10.1002/app.32615

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Journal of Applied Polymer Science

Volumul 118 / 2010 / ISSN 0021-8995 /ISSNe 1097-4628

Ultrafine particles of bismuth(III) compounds in the phase of crosslinked polymers: Precursors for new sorbents and catalysts

DOI:https://doi.org/10.1002/app.32615

Pag. 2674-2681

Gutsanu Vasile¹, Cojocaru Ludmila D.¹, Lisă Gabriela Apreotesei², Volodina Galina³

¹ Moldova State University,
² Gheorghe Asachi Technical University of Iasi,
³ Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 14 decembrie 2023

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In this article, we show that strongly basic anion exchangers (AV-17 and Purolite A-400) are able to retain Bi(III)-containing cations from Bi(NO ₃)₃ solutions. The sorption isotherms of the cations at 30 and 50°C were obtained. The sorption increased with increasing temperature. Scanning electron microscopy showed that in the polymer phase, ultrafine particles of Bi(III)-containing compounds were formed. On heating (87°C) in water and in an Na²SO⁴ solution, Bi(III)-containing ultrafine particles became relatively massive. Powder X-ray diffraction showed the existence of the crystalline phase of BiOCl and Bi₂O₃ on the surface and in the volume of the polymer granules. The behavior of the Bi(III)-containing polymer in the HCl, HNO₃, and H₂SO ₄ solutions (pH 0-2.5) was investigated. The Bi(III)-containing compounds in the polymer phase were stable at pH > 2. The desorption degree of Bi³⁺ in the HNO₃ solution was much greater than in the HCl or H²SO⁴ solutions. Thermogravimetric investigation (in an N² atmosphere) in the range 25-1000°C of the Bi(III)-containing polymer was also carried out. The Bi(III)-containing polymer was stable up to 120°C.

Cuvinte-cheie
adsorption, Bismuth, desorption, hydrochloric acid, ion exchangers, Polymers, Positive ions, scanning electron microscopy, thermodynamic properties, thermogravimetric analysis, X ray diffraction, X rays

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<cfAbstr cfLangCode='EN' cfTrans='o'><p>In this article, we show that strongly basic anion exchangers (AV-17 and Purolite A-400) are able to retain Bi(III)-containing cations from Bi(NO&nbsp;<sub>3</sub>)<sub>3</sub>&nbsp;solutions. The sorption isotherms of the cations at 30 and 50&deg;C were obtained. The sorption increased with increasing temperature. Scanning electron microscopy showed that in the polymer phase, ultrafine particles of Bi(III)-containing compounds were formed. On heating (87&deg;C) in water and in an Na<sup>2</sup>SO<sup>4</sup>&nbsp;solution, Bi(III)-containing ultrafine particles became relatively massive. Powder X-ray diffraction showed the existence of the crystalline phase of BiOCl and Bi<sub>2</sub>O<sub>3</sub>&nbsp;on the surface and in the volume of the polymer granules. The behavior of the Bi(III)-containing polymer in the HCl, HNO<sub>3</sub>, and H<sub>2</sub>SO&nbsp;<sub>4</sub>&nbsp;solutions (pH 0-2.5) was investigated. The Bi(III)-containing compounds in the polymer phase were stable at pH &gt; 2. The desorption degree of Bi<sup>3+</sup>&nbsp;in the HNO<sub>3</sub>&nbsp;solution was much greater than in the HCl or H<sup>2</sup>SO<sup>4</sup>&nbsp;solutions. Thermogravimetric investigation (in an N<sup>2</sup>&nbsp;atmosphere) in the range 25-1000&deg;C of the Bi(III)-containing polymer was also carried out. The Bi(III)-containing polymer was stable up to 120&deg;C.&nbsp;</p></cfAbstr>
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