Interaction between adsorbed molecules and tailor made large chelating ligands grafted on SBA-15 studied by means of thermoporometry
| Autor: | Dariusz Cież, Michał Skiba, Marcelina Radko, Wojciech Stawiński, Agnieszka Węgrzyn, Dorota Majda |
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| Přispěvatelé: | Repositório Científico do Instituto Politécnico do Porto |
| Rok vydání: | 2018 |
| Předmět: |
heavy metal ions
Organic dyes 02 engineering and technology 010402 general chemistry mesoporous SBA-15 adsorbents 01 natural sciences Mesoporous SBA-15 adsorbents chemistry.chemical_compound organic functionalization Adsorption Methyl orange Molecule General Materials Science Chelation organic dyes Organic functionalization Cationic polymerization General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Congo red Chemical engineering chemistry Heavy metal ions Mechanics of Materials thermoporometry Thermoporometry 0210 nano-technology Mesoporous material Hybrid material |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1387-1811 |
| Popis: | Modified mesoporous silicas were examined as adsorbents for efficient removal of model pollutants from wastewaters. Functionalized SBA-15 materials for capture of cationic pollutants such as metal cations and anionic dyes were obtained using post-synthesis grafting method. Large organic ligands containing acetyloacetone, 2-aminopyridine, 2-aminothiazole and 2-aminobenzothiazole groups were incorporated into the adsorbents' structure. The adsorption capacities reached levels of 38.6, 43.1, 64.3, 68.6 and 88.9 mg g−1 for Cu2+, Rose Bengal, Congo Red, Levafix Amber CA gran and Methyl Orange, respectively. Moreover, the adsorption efficiency depended on a type of the model molecule and a type of the surface chelating group. The pores' size and the pores' volume of the hybrid materials before and after adsorption was determined in hydrated state using thermoporometry. For the first time, by means of this methodology, it was possible to propose a model of interactions between the adsorbed molecules and the grafted organosilanes. Adsorption of organic dyes resulted in most cases in formation of J-aggregates. Part of the research was carried out with the equipment purchased thanks to the financial support of the European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program (contract no. POIG.02.01.00-12-023/08) and within the scope of the project of Labóratorio Associado para Química Verde – Technologia e Processos Limpos – UID/QUI/50006, is financed by national founds of FCT/MEC and co-financed by Fundos FEDER (POCI-01-0145-FEDER-007265) within the scope of the partnership agreement PT2020. To all financing sources the authors are greatly indebted. |
| Databáze: | OpenAIRE |
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