Post-synthetic preparations of titanium-containing mesopore molecular sieves

• Published in: Applied catalysis. A, General Vol. 181; no. 1; pp. 39 - 49
• Main Authors: Ahn, W.S, Lee, D.H, Kim, T.J, Kim, J.H, Seo, G, Ryoo, R
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 03.05.1999; Elsevier
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; Ion-exchange; Mesoporous molecular sieves; Peroxide oxidation; Post-synthesis; Surface physical chemistry; Titanium; Zeolites: preparations and properties; Titanium; Peroxide oxidation; Post-synthesis; Mesoporous molecular sieves; Oxidation; Zeolite; Experimental study; X ray diffraction; Porous material; Physisorption; Fourier spectrometry; Mesoporosity; Molecular sieve; Titanium ion
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/S0926-860X(98)00384-6

Titanium-substituted mesoporous molecular sieves were prepared post-synthetically by applying Ti-butoxide in ethanol solutions of different concentrations to MCM-41, MCM-48, and KIT-1. The catalysts obtained were characterized by XRD, FT-IR, UV–Vis spectroscopies, XAS, and N 2 physisorption. Incorporation of Ti seems to promote further crosslinking of the mesoporous walls of the samples, and resulted in wall thickness increases. The post-synthetically prepared Ti-mesoporous derivatives using titanium butoxide grafting were catalytically active for the selective oxidation of 2,6-di- tert-butylphenol with H 2O 2. Their activities depended on the Ti concentration of the catalysts. Comparison works with hydrothermally prepared Ti-MCM-41, Ti-HMS or post-synthetically prepared Ti-mesopore catalysts, either using titanocene grafting or by TiCl 4 atom planting method, are also reported.