Ethane-bridged periodic mesoporous organosilicas functionalized with high loadings of carboxylic acid groups: Synthesis, bifunctionalization, and fabrication of metal nanoparticles

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题名:	Ethane-bridged periodic mesoporous organosilicas functionalized with high loadings of carboxylic acid groups: Synthesis, bifunctionalization, and fabrication of metal nanoparticles
作者:	高憲明;Deka, Juti Rani;Kao, Hsien-Ming;Huang, Shu-Ying;Chang, Wei-Chieh;Ting, Chun-Chiang;Rath, Purna Chandra;Chen, Ching-Shiun
贡献者:	理學院化學學系
关键词:	Carboxylic acids;Channels;Chemistry;Diffraction;Ethane;Fabrication;mesoporous materials;Nanoparticles;NMR;Nuclear magnetic resonance;Platinum;Silica;Silver;Sodium salts;X-ray diffraction;X-rays
日期:	2014-01-13
上传时间:	2026-04-21 14:23:00 (UTC+8)
出版者:	Wiley-VCH Verlag;Weinheim: WILEY-VCH Verlag
摘要:	摘要： Well‐ordered periodic mesoporous organosilicas (PMOs) functionalized with high contents of carboxylic acid (COOH) groups, up to 85 mol % based on silica, were synthesized by co‐condensation of 1,2‐bis(triethoxysilyl)ethane (BTEE) and carboxyethylsilanetriol sodium salt (CES) under acidic conditions by using alkyl poly(oxyethylene) surfactant Brij 76 as a structure‐directing agent. A variety of techniques including powder X‐ray diffraction (XRD), nitrogen adsorption/desorption, Fourier‐transformed infrared (FTIR), transmission electron microscopy (TEM), 13C‐ and 29Si solid‐state nuclear magnetic resonance (NMR) were used to characterize the products. The materials thus obtained were used as an effective support to synthesize metal nanoparticles (Ag and Pt) within the channel of 2D hexagonal mesostructure of PMOs. The size and distribution of the nanoparticles were observed to be highly dependent on the interaction between the carboxylic acid functionalized group and the metal precursors. The size of Pt nanoparticles reduced from 3.6 to 2.5 nm and that of Ag nanoparticles reduced from 5.3 to 3.4 nm with the increase in the COOH loading from 10 to 50 %. Control by functionalization! Highly ordered ethane‐bridged periodic mesoporous organosilicas functionalized with exceptionally high loadings of COOH groups were synthesized and used to fabricate Pt and Ag nanoparticles (see figure). The particle sizes were highly dependent on the COOH content. 其他題名： Chem. Eur. J 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2014-01-13 出處： Chemistry : a European journal, 2014-01, Vol.20 (3), p.894-903 資源來源： Alma/SFX Local Collection 版權： Copyright © 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 版權： Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 版權： Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 識別號： ISSN: 0947-6539 識別號： ISSN: 1521-3765 識別號： EISSN: 1521-3765 識別號： DOI: 10.1002/chem.201303167 識別號： PMID: 24338957 識別號： CODEN: CEUJED
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