One-pot preparation of poly(styrene-co-divinylbenzene)/silver nanoparticles composite microspheres with tunable porosity and their catalytic degradation of methylene blue in aqueous solution
| Autor: | Franziska Griesing, Werner Pauer, Sun Yushan, Bin Sun, Meifang Zhu, Hans-Ulrich Moritz, Ruijia Yan, Ji Xiaohuan |
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| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science Scanning electron microscope General Chemical Engineering Dispersity 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Divinylbenzene 01 natural sciences Silver nanoparticle 0104 chemical sciences Styrene chemistry.chemical_compound Chemical engineering chemistry Polymerization Polymer chemistry Polystyrene 0210 nano-technology |
| Zdroj: | RSC Adv.. 7:50176-50187 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c7ra10111b |
| Popis: | A series of poly(styrene-co-divinylbenzene)/silver nanoparticle (P(St-DVB)/AgNP) composite microspheres with tunable porosity were synthesized by seed swelling polymerization in one pot using linear polystyrene seeds as templates and nanosized organic soluble AgNPs as the silver source. The polymerization of styrene and divinylbenzene took place inside the seed particles and AgNPs were dispersed directly into the mixture of styrene and divinylbenzene during the polymerization. The morphology properties of P(St-DVB)/AgNPs microspheres were characterized by optical microscope, scanning electron microscope (SEM) and nitrogen adsorption/desorption. The influencing parameters on the morphology of the microspheres, including feed ratio of styrene (monomer) and divinylbenzene (crosslinker), addictive amount of AgNPs and the variety of the porogens were systematically investigated. The porosity of the composite microspheres could be tuned from nonporous to mesoporous and to macroporous by control over these parameters. Meanwhile, AgNPs loading dispersity of the composite microspheres was characterized by transmission electron microscope (TEM), energy-dispersive X-ray spectroscopy (EDS), SEM and thermogravimetric analysis (TGA). TEM, EDS and SEM results demonstrated that the AgNPs had been loaded both inside and on the surface of the microspheres. The sizes of the loaded AgNPs were influenced by the addictive amount of AgNPs and the kinds of porogens used in the polymerization. Moreover, compared to the P(St-DVB) microspheres, the Ag-loading composite microspheres synthesized in this paper exhibited excellent catalytic activity and reusability in the degradation of methylene blue in the presence of NaBH4. |
| Databáze: | OpenAIRE |
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