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Novel Synthesis of Ordered MCM‐41 Titanosilicates with Very High Titanium Content via Ultrasound Radiation
Author(s) -
Tang Xianghai,
Wen Xin,
Huang Weiping,
Liu Suwen,
Wang Yanqin,
Palchik Oleg,
Koltypin Yuri,
Pickup David M.,
Van Eck Ernst R.H.,
Gedanken Aharon
Publication year - 2004
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/q9pv-blgj-uhnf-a9uj
Subject(s) - titanium , chemistry , sonication , condensation , crystallization , chemical engineering , desorption , adsorption , hydrolysis , dispersion (optics) , organic chemistry , chromatography , physics , optics , engineering , thermodynamics
A novel synthetic strategy has been developed for the fabrication of mesostructured titanosilicate with very high titanium content. By the combination of ultrasound radiation and a separate hydrolysis procedure, highly ordered MCM‐41 titanosilicates can be synthesized within 3 h from gels with Ti/Si ratios up to 1. The physicochemical properties of the materials were characterized by means of XRD, TEM, FT‐IR, UV‐Vis DRS, 29 Si MAS NMR, and liquid nitrogen adsorption‐desorption measurements. The results suggested that during crystallization, sonication re‐dispersed and accelerated the condensation of inorganic species, and resulted in more condensed pore walls compared to those synthesized with the conventional methods. The presence of silica and ultrasound radiation remarkably suppressed the aggregation of titanium species, thus, at the medium titanium level, a relatively homogeneous dispersion of titanium within the MCM‐41 framework was attained.