Synthesis and structural investigations on aluminium-free Ti-Beta/SBA-15 composite

详细信息    查看全文

• 作者：Matjaž ; Mazaj ; Wesley J.J. Stevens ; Nataš ; a Zabukovec Logar ; Alenka Ristić ; Nataš ; a Novak Tuš ; ar ; Iztok Arč ; on ; Nina Daneu ; Vera Meynen ; Pegie Cool ; Etienne F. Vansant
• 关键词：Microporous/mesoporous composite ; Plugged hexagonal templated silica ; PHTS ; Ti-Beta/SBA-15 ; N₂-sorption ; Ti EXAFS ; Ti XANES
• 刊名：Microporous and Mesoporous Materials
• 出版年：2009
• 出版时间：1 January 2009
• 年：2009
• 卷：117
• 期：1-2
• 页码：458-465
• 全文大小：516 K

文摘

An aluminium-free Ti-Beta/SBA-15 composite material was prepared by the post-synthesis incipient wetness-deposition of different amounts of Ti-Beta nanoparticles solution on the SBA-15 matrix. The presence of crystalline nanoparticles in the solution, used for impregnation on SBA-15, was confirmed by HRTEM measurements. The hexagonal arrangement of the mesopores of SBA-15 was proven by XRD and TEM measurements. The presence and the deposition of Ti-incorporated zeolitic nanoparticles on the mesopore walls of SBA-15 were proven by nitrogen sorption analysis, IR spectroscopy and TG analysis. The X-ray absorption spectroscopy analysis of local environment of titanium incorporated in the new composite material showed that the product contained five fold coordinated framework titanium. These Ti sites can be oxidation titanium sites.