Details

Autor(en) / Beteiligte

• Wu, Hao-Yiang
• Shieh, Fa-Kuen
• Kao, Hsien-Ming
• Chen, Yi-Wen
• Deka, Juti Rani
• Liao, Shih-Hsiang
• Wu, Kevin C.-W.

Titel

Synthesis, Bifunctionalization, and Remarkable Adsorption Performance of Benzene-Bridged Periodic Mesoporous Organosilicas Functionalized with High Loadings of Carboxylic Acids

Ist Teil von

• Chemistry : a European journal, 2013-05, Vol.19 (20), p.6358-6367

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2013

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• Highly ordered benzene‐bridged periodic mesoporous organosilicas (PMOs) that were functionalized with exceptionally high loadings of carboxylic acid groups (COOH), up to 80 mol % based on silica, have been synthesized and their use as adsorbents for the adsorption of methylene blue (MB), a basic dye pollutant, and for the loading and release of doxorubicin (DOX), an anticancer drug, is demonstrated. These COOH‐functionalized benzenesilicas were synthesized by the co‐condensation of 1,4‐bis(triethoxysilyl) benzene (BTEB) and carboxyethylsilanetriol sodium salt (CES), an organosilane that contained a carboxylic acid group, in the presence of non‐ionic oligomeric surfactant Brij 76 in acidic medium. The materials thus obtained were characterized by a variety of techniques, including powder X‐ray diffraction (XRD), nitrogen‐adsorption/desorption isotherms, TEM, and 13C and 29Si solid‐state NMR spectroscopy. Owing to the exceptionally high loadings of COOH groups, their high surface areas, and possible ππ‐stacking interactions, these adsorbents have very high adsorption capacities and extremely rapid adsorption rates for MB removal and for the controlled loading/release of DOX, thus manifesting their great potential for environmental and biomedical applications. Functionalization matters! Highly ordered benzene‐bridged periodic mesoporous silicas with extremely high loadings (up to 80 mol %) of COOH groups have been synthesized and used as adsorbents for the removal of methylene blue (MB) and the delivery of an anticancer drug, doxorubicin (DOX). These materials exhibited high adsorption capacities, rapid adsorption rates for methylene blue removal, and an excellent loading/release profile for doxorubicin.