Journal
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
Volume 27, Issue 2, Pages 232-236Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2006.05.012
Keywords
mesoporous silica; SBA-15; MCM-41; myoglobin; adsorption
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The present work describes the adsorption of myoglobin over mesoporous materials with different pore diameters (SBA-15 and MCM-41) from buffered solutions. The Langmuir-type adsorption of myoglobin occurs with monolayer coverage on the inner surface of the mesoporous channels. These adsorbents were thoroughly characterized by X-ray diffraction, nitrogen adsorption/desorption and FT-IR spectroscopy before and after the myoglobin adsorption. The amount of myoglobin adsorbed significantly depends on the specific pore volume and/or the pore diameter of the mesoporous silica adsorbents. These experimental results were analyzed using pore-filling models, suggesting that myoglobin molecules are well-packed in the SBA-15 pores. FT-IR spectra before and after the adsorption confirm the structural stability of the adsorbed myoglobin. (c) 2006 Elsevier B.V. All rights reserved.
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