J. Phys. Chem. C 2008, 112, 19367–19371
19367
Design and Synthesis of Microporous and Micro/Mesoporous Silica Materials with Excellent Adsorption Properties via Self-Assembly of Silica Species with Tetraethyl Ammonium in Acidic Aqueous Media Yanyan Ji,† Chunyu Wang,‡ Yongcun Zou,† Jiangwei Song,† Jingyuan Wang,† Fei Li,*,‡ and Feng-Shou Xiao*,† State Key Laboratory of Inorganic Synthesis and PreparatiVe Chemistry, and State Key Laboratory of Supramolecular Structure and Materials, Jilin UniVersity, Changchun 130012, People’s Republic of China ReceiVed: August 07, 2008; ReVised Manuscript ReceiVed: September 30, 2008
The concentration dependence of tetraethyl ammonium cations (TEA+) in strongly acidic media was investigated through a pulsed field gradient nuclear magnetic resonance (PFG-NMR) technique. The results indicated that TEA+ is monodispersed in aqueous solution at relatively low concentration (
