Ordered cubic mesoporous silica KIT-5 functionalized with carboxylic acid groups for dye removal

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题名:	Ordered cubic mesoporous silica KIT-5 functionalized with carboxylic acid groups for dye removal
作者:	高憲明;Deka, Juti Rani;Lin, Yu-Hsuan;Kao, Hsien-Ming
贡献者:	理學院化學學系
关键词:	acid orange 7;adsorbents;Adsorption;Carboxylic acids;Dyes;electrostatic interactions;Fourier transform infrared spectroscopy;Mass transfer;methylene blue;nitrogen;nuclear magnetic resonance spectroscopy;Pluronic F127;porous media;rhodamines;silica;Silicon dioxide;sodium;Sodium salts;Sorption;thermogravimetry;titration;transmission electron microscopy;X-ray diffraction
日期:	2014-01-01
上传时间:	2026-04-21 14:21:07 (UTC+8)
出版者:	Royal Society of Chemistry
摘要:	摘要： Cubic cage-type KIT-5 mesoporous silica functionalized with carboxylic acid (-COOH) groups, ranging from 0 to 45 mol% based on silica, were synthesized viaco-condensation of tetraethyl orthosilicate (TEOS) and carboxyethylsilanetriol sodium salt (CES) in the presence of Pluronic F127 in acidic media. The materials thus obtained were characterized by powder X-ray diffraction, nitrogen sorption, transmission electron microscopy, FTIR, thermogravimetric analysis, acid-base titration, and solid-state NMR measurements. The -COOH functionalized KIT-5 was used to adsorb different types of dyes such as phenosafranine (PF), methylene blue (MB), orange II (OII) and rhodamine B (RhB). The -COOH functionalized KIT-5 materials exhibited excellent adsorption capacities for cationic PF and MB, and amphoteric RhB in comparison to pure silica KIT-5, but the opposite for anionic OII. The adsorption was highly dependent on the electrostatic interaction between the adsorbent and the dye molecules. External mass transfer and intra-particle diffusion collectively control the adsorption process. 出版日期： 2014-01-01 出處： RSC advances, 2014-01, Vol.4 (90), p.49061-49069 資源來源： Royal Society of Chemistry 識別號： ISSN: 2046-2069 識別號： EISSN: 2046-2069 識別號： DOI: 10.1039/C4RA08819K
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