| 학회 | 한국공업화학회 |
| 학술대회 | 2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 | 19권 1호 |
| 발표분야 | 환경에너지_포스터 |
| 제목 | Synthesis and amine-grafted on mesoporous silica, SBA-15 |
| 초록 | Conventional adsorbents such as chitosan, pumice and activated carbons, have been used in removing nitrates from water ways. However, in general, it falls short of expectations when they are applied in actual field because of their low adsorption capacities for nitrates. Therefore it is important to make high-quality adsorbents that have not only physical and chemical stability but also high adsorption capacity. It has been known that mesoporous silica materials such as SBA-15 and MCM-48 can give a solution to overcome demerits of existing absorbents, especially when they are grafted with amines. In this work P123, poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol), was used as a structure directing agent and TEOS, tetraethyl orthosilicate, was used as silica source for the synthesis of SBA-15. The SBA-15 was also post-grafted with a grafting agent, 3-aminopropyltriethoxysilane (APTES). All silica samples obtained were carefully characterized using XRD, SEM and TEM images to check their structure. Whether the grafting was done well or not was checked by FT-IR spectra. The specific surface area and pore size distribution of the mesoporous silica materials were measured from nitrogen adsorption isotherms. Furthermore kinetic and equilibrium experiments for the removal of nitrates were carried out and it was proven that the grafting of the SBA-15 greatly enhances the adsorption capacity of pristine SBA-15. |
| 저자 | 류성철, 김지윤, 심왕근, 문희 |
| 소속 | 전남대 |
| 키워드 | SBA-15; Synthesis of mesoporous silica; Adsorbents; Adsorption capacity; Amine grafting; Nitrates |
