Reversible adsorption and storage of secondary explosives from water using a Tröger's base-functionalised polymer
| العنوان: | Reversible adsorption and storage of secondary explosives from water using a Tröger's base-functionalised polymer |
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| المؤلفون: | Aramballi J. Savyasachi, Manuel Ruether, Graeme W. Watson, Kevin P. Byrne, Deivasigamani Umadevi, Thorfinnur Gunnlaugsson, Sankarasekaran Shanmugaraju, Wolfgang Schmitt |
| المصدر: | Journal of Materials Chemistry A. 5:25014-25024 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | chemistry.chemical_classification, Thermogravimetric analysis, Renewable Energy, Sustainability and the Environment, Inorganic chemistry, Langmuir adsorption model, Picric acid, 02 engineering and technology, General Chemistry, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, symbols.namesake, chemistry.chemical_compound, Adsorption, chemistry, Polymerization, 13. Climate action, symbols, Organic chemistry, General Materials Science, Naked eye, Dimethoxymethane, 0210 nano-technology |
| الوصف: | A Troger's base-functionalised covalent organic polymer (TB-COP) was synthesised and used as an adsorbent for the efficient removal of picric acid (PA) from water through the use of weak and reversible supramolecular interactions such as hydrogen bonding and π–π interactions. TB-COP was readily synthesised in quantitative yield using a one-pot metal-free polymerisation reaction strategy between a semi-flexible aromatic triamine [L; benzene-1,3-5-tricarboxylic acid-tris-(4-amino-phenyl-amide)] and dimethoxymethane. The molecular structure, physicochemical and morphological characteristics of TB-COP were analysed by using various spectroscopic and imaging techniques. Thermogravimetric analysis showed TB-COP to be thermally stable up to 380 °C; while the calculated Brunauer–Emmett–Teller (BET) surface area was found to be 34 m2 g−1 at 273 K. The picric acid adsorption study of the activated TB-COP showed an excellent adsorption capacity of ca. 90% within 60 minutes of contact time at 298 K (Langmuir isotherm model: KL = 0.0541 ± 6 L mg−1, R2 = 0.9962); the adsorption efficiency being shown to improve with increasing temperature. The extraction of PA was also clearly visible to the naked eye, where the yellow colored PA solution became transparent upon addition of TB-COP. Other interfering phenolic organic pollutants showed poor to moderate adsorption efficiency. Importantly, TB-COP could be used to store PA over a long period of time in a safe manner, without any leakage or any significant loss in extraction efficiency. Moreover, the polymer could be reused for several adsorption cycles, as PA could be released back into the solution by simply changing the pH of the aqueous media. This makes TB-COP an extremely promising material for the selective and efficient removal of picric acid from water, and TB-COP can be considered as being a ‘fast’ and naked eye colorimetric indicator for such analytes. |
| تدمد: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c7ta07292a |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::dbb30db13a1c19ef645a1a8b4d725abb https://doi.org/10.1039/c7ta07292a |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........dbb30db13a1c19ef645a1a8b4d725abb |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
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| DOI: | 10.1039/c7ta07292a |