Number of the records: 1
The Influence of Pyrolytic Temperature on Sorption Ability of Carbon Xerogel Based on 3-Aminophenol-formaldehyde Polymer for Cu(II) Ions and Phenol.
- 1.
SYSNO ASEP 0472469 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The Influence of Pyrolytic Temperature on Sorption Ability of Carbon Xerogel Based on 3-Aminophenol-formaldehyde Polymer for Cu(II) Ions and Phenol. Author(s) Veselá, P. (CZ)
Slovák, V. (CZ)
Zelenka, T. (CZ)
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Mucha, M. (CZ)Source Title Journal of Analytical and Applied Pyrolysis. - : Elsevier - ISSN 0165-2370
Roč. 121, SEP (2016), s. 29-40Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords temperature of pyrolysis ; sorption mechanism ; Cu(II) ions Subject RIV CI - Industrial Chemistry, Chemical Engineering Institutional support UCHP-M - RVO:67985858 UT WOS 000384851500004 EID SCOPUS 84990867071 DOI 10.1016/j.jaap.2016.06.016 Annotation The carbonaceous samples based on 3-aminophenol-formaldehyde polymer were prepared by pyrolysis at different temperatures (400-900 degrees C). The obtained trends for sorption of phenol (similar to 0.03-0.4 mmol g(-1)) and Cu(II) ions (similar to 0.03-0.2 mmol g(-1)) were explained by a detailed study of pyrolysis and surface characteristics. The surface charge of the samples during phenol sorption (pH similar to 7.3) was not changed; however, uptake of Cu(II) (pH similar to 5.7) is partially reflected by the different surface charge of the samples. The changes in surface functionalities (obtained by TGA-MS, XPS, FTIR and elemental analysis) and also trend in microporosity during pyrolysis can also explain sorption behaviour of phenol and Cu(II). Based on the results, the following sorption mechanisms were postulated. Sorption of Cu(II) ions is complex and can be explained by complexation of Cu(II) with pyridinic and pyridonic nitrogen together with physical sorption in micropores (up 700 degrees C). Sorption is also affected by positively charged surface at 800 degrees C and 900 degrees C. Precipitation of Cu(II) is minor mechanism. For sorption of phenol, the combination of chemisorption on surface groups and physical sorption in micropores seems reasonable for the samples pyrolysed at 400-600 degrees C. Only physisorption prevails for the samples pyrolysed at higher temperatures. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2017
Number of the records: 1