Adsorption of L-histidine over mesoporous carbon molecular sieves

Vinu, A., Hossain, K. Z., Kumar, G. Satish and Ariga, K. (2006) Adsorption of L-histidine over mesoporous carbon molecular sieves. Carbon, 44 3: 530-536. doi:10.1016/j.carbon.2005.08.004

Author Vinu, A.
Hossain, K. Z.
Kumar, G. Satish
Ariga, K.
Title Adsorption of L-histidine over mesoporous carbon molecular sieves
Journal name Carbon   Check publisher's open access policy
ISSN 0008-6223
Publication date 2006-03
Sub-type Article (original research)
DOI 10.1016/j.carbon.2005.08.004
Volume 44
Issue 3
Start page 530
End page 536
Total pages 7
Place of publication Oxford United Kingdom
Publisher Pergamon
Collection year 2006
Language eng
Formatted abstract
Mesoporous carbon, CMK-3, was prepared by large pore hexagonal mesoporous silica SBA-15. The structural order and textural properties of all the materials were studied by XRD, HRTEM, and nitrogen adsorption. Adsorption of l-histidine (His) over various porous adsorbents such as CMK-3, SBA-15, and activated carbon was studied from solutions with different pH. His adsorption was observed to be pH dependent with maximum adsorption near the isoelectric point of the amino acid. CMK-3 showed a larger amount of His adsorption as compared to SBA-15 and the conventional adsorbent, namely activated carbon. CMK-3 registers the total adsorption capacity of ca. 1350 μmol g-1 which is ca. 12 times higher than the adsorption capacity of SBA-15. This large difference could be mainly due to the stronger hydrophobic interaction between the non-polar side chains of amino acids and the hydrophobic surface of the mesoporous carbon as compared to mesoporous silica. The influence of ionic strengths on the adsorption of His was also studied and the results are discussed. Nitrogen adsorption of CMK-3 after His adsorption confirmed that His molecules are tightly packed inside the mesopores.
Keyword Porous carbon
X-ray diffraction BET surface area
Adsorption Properties
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
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