Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant
The purpose of the present study was to synthesize and characterize nanosilica from alkali-extraction of silica fume under controlled conditions using poly (vinyl alcohol) (PVA) as a dispersing agent. The dissolution efficiency of silica fume was affected by various factors such as concentration of...
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| Format: | Article |
| Language: | English |
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University of Tehran
2014-12-01
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| Series: | Journal of Ultrafine Grained and Nanostructured Materials |
| Subjects: | |
| Online Access: | http://jufgnsm.ut.ac.ir/article_52801_ee3cc003fdae2f3b5263593bc072bcb6.pdf |
| _version_ | 1818009878006857728 |
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| author | Vajihe Jafari Ali Allahverdi |
| author_facet | Vajihe Jafari Ali Allahverdi |
| author_sort | Vajihe Jafari |
| collection | DOAJ |
| description | The purpose of the present study was to synthesize and characterize nanosilica from alkali-extraction of silica fume under controlled conditions using poly (vinyl alcohol) (PVA) as a dispersing agent. The dissolution efficiency of silica fume was affected by various factors such as concentration of the reagent, reaction time and temperature. A maximum dissolution efficiency of 91% was achieved at the sodium hydroxide solution concentration of 2.5 M, after areaction time of 30 minutes and at areaction temperature of 80°C. The microstructure and morphology of the obtained nanosilica powder at the optimum conditions were characterized using scanning electron microscopy (SEM). SEM images confirmed the formation of smaller and less agglomerated nanosilica particles due to the existence of the surfactant. Further, the synthesized nanosilica was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRF) and X-ray diffraction (XRD). The results show that the synthesized nanosilica consisted of pure silica particles. |
| first_indexed | 2024-04-14T05:48:30Z |
| format | Article |
| id | doaj.art-58106ea301ac404b9eb12fdb697b8dd9 |
| institution | Directory Open Access Journal |
| issn | 2423-6845 2423-6837 |
| language | English |
| last_indexed | 2024-04-14T05:48:30Z |
| publishDate | 2014-12-01 |
| publisher | University of Tehran |
| record_format | Article |
| series | Journal of Ultrafine Grained and Nanostructured Materials |
| spelling | doaj.art-58106ea301ac404b9eb12fdb697b8dd92022-12-22T02:09:13ZengUniversity of TehranJournal of Ultrafine Grained and Nanostructured Materials2423-68452423-68372014-12-0147210511210.7508/jufgnsm.2014.02.00752801Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactantVajihe Jafari0Ali Allahverdi1Cement Research Center, School of Chemical Engineering, Iran University of Science and Technology, Narmak 16846-13114, Tehran, IranCement Research Center, School of Chemical Engineering, Narmak 16846-13114, Teharn, IranThe purpose of the present study was to synthesize and characterize nanosilica from alkali-extraction of silica fume under controlled conditions using poly (vinyl alcohol) (PVA) as a dispersing agent. The dissolution efficiency of silica fume was affected by various factors such as concentration of the reagent, reaction time and temperature. A maximum dissolution efficiency of 91% was achieved at the sodium hydroxide solution concentration of 2.5 M, after areaction time of 30 minutes and at areaction temperature of 80°C. The microstructure and morphology of the obtained nanosilica powder at the optimum conditions were characterized using scanning electron microscopy (SEM). SEM images confirmed the formation of smaller and less agglomerated nanosilica particles due to the existence of the surfactant. Further, the synthesized nanosilica was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRF) and X-ray diffraction (XRD). The results show that the synthesized nanosilica consisted of pure silica particles.http://jufgnsm.ut.ac.ir/article_52801_ee3cc003fdae2f3b5263593bc072bcb6.pdfnanosilicasilica fumedissolution efficiencySurfactantPVA |
| spellingShingle | Vajihe Jafari Ali Allahverdi Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant Journal of Ultrafine Grained and Nanostructured Materials nanosilica silica fume dissolution efficiency Surfactant PVA |
| title | Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant |
| title_full | Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant |
| title_fullStr | Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant |
| title_full_unstemmed | Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant |
| title_short | Synthesis of nanosilica from silica fume using an acid-base precipitation technique and PVA as a nonionic surfactant |
| title_sort | synthesis of nanosilica from silica fume using an acid base precipitation technique and pva as a nonionic surfactant |
| topic | nanosilica silica fume dissolution efficiency Surfactant PVA |
| url | http://jufgnsm.ut.ac.ir/article_52801_ee3cc003fdae2f3b5263593bc072bcb6.pdf |
| work_keys_str_mv | AT vajihejafari synthesisofnanosilicafromsilicafumeusinganacidbaseprecipitationtechniqueandpvaasanonionicsurfactant AT aliallahverdi synthesisofnanosilicafromsilicafumeusinganacidbaseprecipitationtechniqueandpvaasanonionicsurfactant |