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![]() LUPASCU, Tudor, NASTAS, Raisa, IVANETS, Andrei, POSTOLACHI, Larisa, AZAROVA, Tatyana, RUSU, Vasile, KUZNETSOVA, Tatyana F., PETUHOV, Oleg, CEBAN (GÎNSARI), Irina, GOREACIOC (ARAPU), Tatiana. Porous structure of active carbons modified with manganese compounds. In: Chemistry, physics and technology of surface : Devoted to the 30th anniversary of the founding of Chuiko Institute of Surface Chemistry of NAS of Ukraine. Workshop "Nanostructured biocompatible / bioactive materials", 17-18 mai 2016, Kyiv. Kyiv, Ukraine: Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 2016, p. 69. ISBN 978-966-02-7921-6. |
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Chemistry, physics and technology of surface 2016 | |||||||
Conferința "Chemistry, physics and technology of surface" Kyiv, Ucraina, 17-18 mai 2016 | |||||||
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Pag. 69-69 | |||||||
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Active carbons have a distinguished ability for removing wide ranges of |
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<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'> <dc:creator>Lupaşcu, T.G.</dc:creator> <dc:creator>Nastas, R.I.</dc:creator> <dc:creator>Ivanets, A.I.</dc:creator> <dc:creator>Postolachi, L.V.</dc:creator> <dc:creator>Azarova, T.A.</dc:creator> <dc:creator>Rusu, V.I.</dc:creator> <dc:creator>Kuzneţova, T.</dc:creator> <dc:creator>Petuhov, O.M.</dc:creator> <dc:creator>Ceban (Gînsari), I.N.</dc:creator> <dc:creator>Goreacioc (Arapu), T.L.</dc:creator> <dc:date>2016</dc:date> <dc:description xml:lang='en'><p>Active carbons have a distinguished ability for removing wide ranges of<br />compounds from gas, aqueous and organic phases. The high adsorptive capacity<br />of active carbons is due to the high density of surface functional groups, large<br />porosity and intense specific surface area. Surface modification of active<br />carbons by metals for better selectivity in catalytic activity is also an interesting<br />research area.<br />The aim of this work was to obtain modified active carbons with<br />manganese compounds and to study the relationship between the impregnation<br />used conditions (e.g., concentration of manganese solutions, thermal treatment,<br />time, atmosphere) on the manganese loading and porous texture of final<br />samples. Two active carbons with different surface chemistry have been used as<br />carbonaceous support, one with basic surface (pH 9.5) and other with acidic<br />surface (pH 4.0). The structural changes caused by modification were estimated<br />on the basis of nitrogen adsorption-desorption isotherms. Obtained results show<br />that depending on thermal treatment conditions samples synthesised from the<br />carbonaceous support with basic surface have an increase of BET surface area<br />by about 13-26%, and a significant increase of mesopore volume (by 2 times).<br />This effect can be explained by additional activation at 300 °C due to salts used<br />for impregnation. Modified samples, synthesised from the carbonaceous support<br />with acidic surface, are more stable to thermal treatment. The insignificant<br />reduction of BET surface area by about 5-10% is in good agreement with<br />obtaining yield of samples.<br />Acknowledgements<br />The present work was performed within Joint Moldova-Belarus Project “Metal supported<br />catalysts for water treatment: synthesis, properties and using” (Project Nos.<br />15.820.18.02.04/B and X15МЛД -021).</p></dc:description> <dc:source>Chemistry, physics and technology of surface () 69-69</dc:source> <dc:title>Porous structure of active carbons modified with manganese compounds</dc:title> <dc:type>info:eu-repo/semantics/article</dc:type> </oai_dc:dc>