Abstract
Surface-modified mesoporous silicas (MSs) were investigated for recyclable adsorption of an endocrine disrupter, bisphenol A (BPA). Surface-modified MSs were prepared by (i) post-synthesis surface modification of MSs using surface hydroxyl groups and organosilanes (m-MS) and by (ii) co-condensation of tetraethoxysilane and the corresponding organosilanes (d-MS). Infrared measurements indicated that organic groups mainly existed on the surface of m-MS, which resulted in a surface characterized by high hydrophobicity. Both organic groups and isolated hydroxyl groups existed on the surface of d-MS, resulting in both hydrophobicity and hydrophilicity on the surface. The amount of BPA adsorbed on surface-modified MSs per organic group was similar for m-MS and d-MS, however, the d-MS established equilibrium for BPA adsorption faster than m-MS, as measured by UV-vis spectra. A larger amount of BPA per surface area could be adsorbed on carbon materials than on the surface-modified MSs, however, the regeneration of carbon materials by washing could not be done easily. The surface-modified MSs retain adsorption capacity for BPA after several regeneration cycles, demonstrating that the surface-modified MSs are effective recyclable adsorbents of the endocrine disrupter, bisphenol A.
| Original language | English |
|---|---|
| Pages (from-to) | 1689-1694 |
| Number of pages | 6 |
| Journal | Journal of Nanoscience and Nanotechnology |
| Volume | 6 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2006 Jun |
| Externally published | Yes |
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Keywords
- Adsorption Property
- Bisphenol A
- Endocrine Disrupter
- Recyclable Adsorbent
- Surface-Modified Mesoporous Silica
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Materials Science (miscellaneous)
- Engineering (miscellaneous)
Cite this
Surface-modified mesoporous silicas as recyclable adsorbents of an endocrine disrupter, bisphenol A. / Yamaguchi, Aritomo; Awano, Terumasa; Oyaizu, Kenichi; Yuasa, Makoto.
In: Journal of Nanoscience and Nanotechnology, Vol. 6, No. 6, 06.2006, p. 1689-1694.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Surface-modified mesoporous silicas as recyclable adsorbents of an endocrine disrupter, bisphenol A
AU - Yamaguchi, Aritomo
AU - Awano, Terumasa
AU - Oyaizu, Kenichi
AU - Yuasa, Makoto
PY - 2006/6
Y1 - 2006/6
N2 - Surface-modified mesoporous silicas (MSs) were investigated for recyclable adsorption of an endocrine disrupter, bisphenol A (BPA). Surface-modified MSs were prepared by (i) post-synthesis surface modification of MSs using surface hydroxyl groups and organosilanes (m-MS) and by (ii) co-condensation of tetraethoxysilane and the corresponding organosilanes (d-MS). Infrared measurements indicated that organic groups mainly existed on the surface of m-MS, which resulted in a surface characterized by high hydrophobicity. Both organic groups and isolated hydroxyl groups existed on the surface of d-MS, resulting in both hydrophobicity and hydrophilicity on the surface. The amount of BPA adsorbed on surface-modified MSs per organic group was similar for m-MS and d-MS, however, the d-MS established equilibrium for BPA adsorption faster than m-MS, as measured by UV-vis spectra. A larger amount of BPA per surface area could be adsorbed on carbon materials than on the surface-modified MSs, however, the regeneration of carbon materials by washing could not be done easily. The surface-modified MSs retain adsorption capacity for BPA after several regeneration cycles, demonstrating that the surface-modified MSs are effective recyclable adsorbents of the endocrine disrupter, bisphenol A.
AB - Surface-modified mesoporous silicas (MSs) were investigated for recyclable adsorption of an endocrine disrupter, bisphenol A (BPA). Surface-modified MSs were prepared by (i) post-synthesis surface modification of MSs using surface hydroxyl groups and organosilanes (m-MS) and by (ii) co-condensation of tetraethoxysilane and the corresponding organosilanes (d-MS). Infrared measurements indicated that organic groups mainly existed on the surface of m-MS, which resulted in a surface characterized by high hydrophobicity. Both organic groups and isolated hydroxyl groups existed on the surface of d-MS, resulting in both hydrophobicity and hydrophilicity on the surface. The amount of BPA adsorbed on surface-modified MSs per organic group was similar for m-MS and d-MS, however, the d-MS established equilibrium for BPA adsorption faster than m-MS, as measured by UV-vis spectra. A larger amount of BPA per surface area could be adsorbed on carbon materials than on the surface-modified MSs, however, the regeneration of carbon materials by washing could not be done easily. The surface-modified MSs retain adsorption capacity for BPA after several regeneration cycles, demonstrating that the surface-modified MSs are effective recyclable adsorbents of the endocrine disrupter, bisphenol A.
KW - Adsorption Property
KW - Bisphenol A
KW - Endocrine Disrupter
KW - Recyclable Adsorbent
KW - Surface-Modified Mesoporous Silica
UR - http://www.scopus.com/inward/record.url?scp=33750175676&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33750175676&partnerID=8YFLogxK
U2 - 10.1166/jnn.2006.229
DO - 10.1166/jnn.2006.229
M3 - Article
C2 - 17025072
AN - SCOPUS:33750175676
VL - 6
SP - 1689
EP - 1694
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
SN - 1533-4880
IS - 6
ER -