One-Pot Separation of Tea Components through Selective Adsorption on Pore-Engineered Nanocarbon, Carbon Nanocage

Simple, economical, and toxic-solvent-free one-pot separation of tea components, such as catechin and tannic acids, has been demonstrated using the novel pore-engineered nanocarbon, carbon nanocage (CNC), with regularly arranged cage-type mesopores. The CNC materials possess larger specific surface...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2007-09, Vol.129 (36), p.11022-11023
Main Authors: Ariga, Katsuhiko, Vinu, Ajayan, Miyahara, Masahiko, Hill, Jonathan P, Mori, Toshiyuki
Format: Article
Language:English
Subjects:
Adsorption
Caffeine - analysis
Catechin - analysis
Molecular Structure
Nanostructures - chemistry
Tannins - analysis
Tea - chemistry
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Summary:Simple, economical, and toxic-solvent-free one-pot separation of tea components, such as catechin and tannic acids, has been demonstrated using the novel pore-engineered nanocarbon, carbon nanocage (CNC), with regularly arranged cage-type mesopores. The CNC materials possess larger specific surface areas and pore volumes than conventional mesoporous carbon, CMK-3, and also exhibit excellent adsorption capacities for a typical dye (Alizarin Yellow) and tea components (catechin and tannic acids) relative to activated carbon, CMK-3, and mesoporous silica SBA-15. Competitive adsorption of catechin and tannic acid to the CNC material results in highly selective adsorption of tannic acid (ca. 95%) using a very simple one-pot process.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja074870t